Chromatographic analysis of products from the cracking and dehydrogenation of paraffin hydrocarbons
Conclusions For the analysis by displacement chromatography of the products from the cracking and dehydrogenation of paraffinic hydrocarbons boiling up to 240°C the following can be recommended: medium porosity KSS-4 silica gel (subjected to preliminary chemical treatment), grain size 100 to 200 mes...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Zakupra, V. A. [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
1965 |
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| Schlagwörter: |
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| Anmerkung: |
© Consultants Bureau 1966 |
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| Übergeordnetes Werk: |
Enthalten in: Chemistry and technology of fuels and oils - Kluwer Academic Publishers-Plenum Publishers, 1966, 1(1965), 2 vom: Feb., Seite 124-130 |
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| Übergeordnetes Werk: |
volume:1 ; year:1965 ; number:2 ; month:02 ; pages:124-130 |
| Links: |
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| DOI / URN: |
10.1007/BF00731418 |
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| Katalog-ID: |
OLC2049528795 |
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| 245 | 1 | 0 | |a Chromatographic analysis of products from the cracking and dehydrogenation of paraffin hydrocarbons |
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| 520 | |a Conclusions For the analysis by displacement chromatography of the products from the cracking and dehydrogenation of paraffinic hydrocarbons boiling up to 240°C the following can be recommended: medium porosity KSS-4 silica gel (subjected to preliminary chemical treatment), grain size 100 to 200 mesh;a two-stage glass microcolumn of 100 cm length and 20 $ cm^{3} $ volume, which, with an adsorbate: adsorbent ratio of 0.6-0.1, ensures a sufficiently sharp separation of the paraffinic, olefinic, and aromatic hydrocarbons.Under these conditions, it is not necessary to keep the overpressure above 1.4 atm in the glass delivery bottle in order to maintain the optimum flowrate of hydrocarbon mixture through the adsorbent (from 5 to 10 mm/min).The possible appearance of the “boundary” effect is almost completely excluded (when the column is carefully packed) also when a small quantity of chemically treated silica gel dust is added to the above-mentioned material.Artificial mixtures of hydrocarbons containing olefins can be analyzed chromatographically (refractometric identification of the drops eluted) by a graphical method in which the surface tension is taken into account, giving a deviation from the calculated compositions of ±1.6% for mixtures 1, 2, and 3 and ±2.4% for mixture 4 (5).The agreement between parallel determinations, by elution and displacement chromatography, of the functional group composition of the products from the dehydrocracking of paraffinic hydrocarbons, is the basis for recommending the method described for evaluating the chromatograms by using averaged correction factors for treating the results of separating, by adsorption, small quantities of these products (initial loading from 1.0 to 2.0 $ cm^{3} $).By tests on individual hydrocarbons it was shown that by chemical treatment silica gels can be obtained which do not give rise to isomerization of straight-chain and substituted monoolefins under the conditions of displacement chromatography, even when the temperature during the separation is raised to 20°C. Industrial and experimental grades of silica gel not given a preliminary chemical treatment catalyze the isomerization of the aforementioned hydrocarbons under displacement chromatography conditions. | ||
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| 650 | 4 | |a Dehydrogenation | |
| 650 | 4 | |a Cracking | |
| 650 | 4 | |a Experimental Grade | |
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| 700 | 1 | |a Lebedev, E. V. |4 aut | |
| 700 | 1 | |a Manza, I. A. |4 aut | |
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10.1007/BF00731418 doi (DE-627)OLC2049528795 (DE-He213)BF00731418-p DE-627 ger DE-627 rakwb eng 660 VZ Zakupra, V. A. verfasserin aut Chromatographic analysis of products from the cracking and dehydrogenation of paraffin hydrocarbons 1965 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Consultants Bureau 1966 Conclusions For the analysis by displacement chromatography of the products from the cracking and dehydrogenation of paraffinic hydrocarbons boiling up to 240°C the following can be recommended: medium porosity KSS-4 silica gel (subjected to preliminary chemical treatment), grain size 100 to 200 mesh;a two-stage glass microcolumn of 100 cm length and 20 $ cm^{3} $ volume, which, with an adsorbate: adsorbent ratio of 0.6-0.1, ensures a sufficiently sharp separation of the paraffinic, olefinic, and aromatic hydrocarbons.Under these conditions, it is not necessary to keep the overpressure above 1.4 atm in the glass delivery bottle in order to maintain the optimum flowrate of hydrocarbon mixture through the adsorbent (from 5 to 10 mm/min).The possible appearance of the “boundary” effect is almost completely excluded (when the column is carefully packed) also when a small quantity of chemically treated silica gel dust is added to the above-mentioned material.Artificial mixtures of hydrocarbons containing olefins can be analyzed chromatographically (refractometric identification of the drops eluted) by a graphical method in which the surface tension is taken into account, giving a deviation from the calculated compositions of ±1.6% for mixtures 1, 2, and 3 and ±2.4% for mixture 4 (5).The agreement between parallel determinations, by elution and displacement chromatography, of the functional group composition of the products from the dehydrocracking of paraffinic hydrocarbons, is the basis for recommending the method described for evaluating the chromatograms by using averaged correction factors for treating the results of separating, by adsorption, small quantities of these products (initial loading from 1.0 to 2.0 $ cm^{3} $).By tests on individual hydrocarbons it was shown that by chemical treatment silica gels can be obtained which do not give rise to isomerization of straight-chain and substituted monoolefins under the conditions of displacement chromatography, even when the temperature during the separation is raised to 20°C. Industrial and experimental grades of silica gel not given a preliminary chemical treatment catalyze the isomerization of the aforementioned hydrocarbons under displacement chromatography conditions. Hydrocarbon Dehydrogenation Cracking Experimental Grade Hydrocarbon Mixture Lebedev, E. V. aut Manza, I. A. aut Enthalten in Chemistry and technology of fuels and oils Kluwer Academic Publishers-Plenum Publishers, 1966 1(1965), 2 vom: Feb., Seite 124-130 (DE-627)129592196 (DE-600)240238-5 (DE-576)015084906 0009-3092 nnns volume:1 year:1965 number:2 month:02 pages:124-130 https://doi.org/10.1007/BF00731418 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_11 GBV_ILN_70 GBV_ILN_2015 AR 1 1965 2 02 124-130 |
| spelling |
10.1007/BF00731418 doi (DE-627)OLC2049528795 (DE-He213)BF00731418-p DE-627 ger DE-627 rakwb eng 660 VZ Zakupra, V. A. verfasserin aut Chromatographic analysis of products from the cracking and dehydrogenation of paraffin hydrocarbons 1965 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Consultants Bureau 1966 Conclusions For the analysis by displacement chromatography of the products from the cracking and dehydrogenation of paraffinic hydrocarbons boiling up to 240°C the following can be recommended: medium porosity KSS-4 silica gel (subjected to preliminary chemical treatment), grain size 100 to 200 mesh;a two-stage glass microcolumn of 100 cm length and 20 $ cm^{3} $ volume, which, with an adsorbate: adsorbent ratio of 0.6-0.1, ensures a sufficiently sharp separation of the paraffinic, olefinic, and aromatic hydrocarbons.Under these conditions, it is not necessary to keep the overpressure above 1.4 atm in the glass delivery bottle in order to maintain the optimum flowrate of hydrocarbon mixture through the adsorbent (from 5 to 10 mm/min).The possible appearance of the “boundary” effect is almost completely excluded (when the column is carefully packed) also when a small quantity of chemically treated silica gel dust is added to the above-mentioned material.Artificial mixtures of hydrocarbons containing olefins can be analyzed chromatographically (refractometric identification of the drops eluted) by a graphical method in which the surface tension is taken into account, giving a deviation from the calculated compositions of ±1.6% for mixtures 1, 2, and 3 and ±2.4% for mixture 4 (5).The agreement between parallel determinations, by elution and displacement chromatography, of the functional group composition of the products from the dehydrocracking of paraffinic hydrocarbons, is the basis for recommending the method described for evaluating the chromatograms by using averaged correction factors for treating the results of separating, by adsorption, small quantities of these products (initial loading from 1.0 to 2.0 $ cm^{3} $).By tests on individual hydrocarbons it was shown that by chemical treatment silica gels can be obtained which do not give rise to isomerization of straight-chain and substituted monoolefins under the conditions of displacement chromatography, even when the temperature during the separation is raised to 20°C. Industrial and experimental grades of silica gel not given a preliminary chemical treatment catalyze the isomerization of the aforementioned hydrocarbons under displacement chromatography conditions. Hydrocarbon Dehydrogenation Cracking Experimental Grade Hydrocarbon Mixture Lebedev, E. V. aut Manza, I. A. aut Enthalten in Chemistry and technology of fuels and oils Kluwer Academic Publishers-Plenum Publishers, 1966 1(1965), 2 vom: Feb., Seite 124-130 (DE-627)129592196 (DE-600)240238-5 (DE-576)015084906 0009-3092 nnns volume:1 year:1965 number:2 month:02 pages:124-130 https://doi.org/10.1007/BF00731418 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_11 GBV_ILN_70 GBV_ILN_2015 AR 1 1965 2 02 124-130 |
| allfields_unstemmed |
10.1007/BF00731418 doi (DE-627)OLC2049528795 (DE-He213)BF00731418-p DE-627 ger DE-627 rakwb eng 660 VZ Zakupra, V. A. verfasserin aut Chromatographic analysis of products from the cracking and dehydrogenation of paraffin hydrocarbons 1965 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Consultants Bureau 1966 Conclusions For the analysis by displacement chromatography of the products from the cracking and dehydrogenation of paraffinic hydrocarbons boiling up to 240°C the following can be recommended: medium porosity KSS-4 silica gel (subjected to preliminary chemical treatment), grain size 100 to 200 mesh;a two-stage glass microcolumn of 100 cm length and 20 $ cm^{3} $ volume, which, with an adsorbate: adsorbent ratio of 0.6-0.1, ensures a sufficiently sharp separation of the paraffinic, olefinic, and aromatic hydrocarbons.Under these conditions, it is not necessary to keep the overpressure above 1.4 atm in the glass delivery bottle in order to maintain the optimum flowrate of hydrocarbon mixture through the adsorbent (from 5 to 10 mm/min).The possible appearance of the “boundary” effect is almost completely excluded (when the column is carefully packed) also when a small quantity of chemically treated silica gel dust is added to the above-mentioned material.Artificial mixtures of hydrocarbons containing olefins can be analyzed chromatographically (refractometric identification of the drops eluted) by a graphical method in which the surface tension is taken into account, giving a deviation from the calculated compositions of ±1.6% for mixtures 1, 2, and 3 and ±2.4% for mixture 4 (5).The agreement between parallel determinations, by elution and displacement chromatography, of the functional group composition of the products from the dehydrocracking of paraffinic hydrocarbons, is the basis for recommending the method described for evaluating the chromatograms by using averaged correction factors for treating the results of separating, by adsorption, small quantities of these products (initial loading from 1.0 to 2.0 $ cm^{3} $).By tests on individual hydrocarbons it was shown that by chemical treatment silica gels can be obtained which do not give rise to isomerization of straight-chain and substituted monoolefins under the conditions of displacement chromatography, even when the temperature during the separation is raised to 20°C. Industrial and experimental grades of silica gel not given a preliminary chemical treatment catalyze the isomerization of the aforementioned hydrocarbons under displacement chromatography conditions. Hydrocarbon Dehydrogenation Cracking Experimental Grade Hydrocarbon Mixture Lebedev, E. V. aut Manza, I. A. aut Enthalten in Chemistry and technology of fuels and oils Kluwer Academic Publishers-Plenum Publishers, 1966 1(1965), 2 vom: Feb., Seite 124-130 (DE-627)129592196 (DE-600)240238-5 (DE-576)015084906 0009-3092 nnns volume:1 year:1965 number:2 month:02 pages:124-130 https://doi.org/10.1007/BF00731418 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_11 GBV_ILN_70 GBV_ILN_2015 AR 1 1965 2 02 124-130 |
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10.1007/BF00731418 doi (DE-627)OLC2049528795 (DE-He213)BF00731418-p DE-627 ger DE-627 rakwb eng 660 VZ Zakupra, V. A. verfasserin aut Chromatographic analysis of products from the cracking and dehydrogenation of paraffin hydrocarbons 1965 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Consultants Bureau 1966 Conclusions For the analysis by displacement chromatography of the products from the cracking and dehydrogenation of paraffinic hydrocarbons boiling up to 240°C the following can be recommended: medium porosity KSS-4 silica gel (subjected to preliminary chemical treatment), grain size 100 to 200 mesh;a two-stage glass microcolumn of 100 cm length and 20 $ cm^{3} $ volume, which, with an adsorbate: adsorbent ratio of 0.6-0.1, ensures a sufficiently sharp separation of the paraffinic, olefinic, and aromatic hydrocarbons.Under these conditions, it is not necessary to keep the overpressure above 1.4 atm in the glass delivery bottle in order to maintain the optimum flowrate of hydrocarbon mixture through the adsorbent (from 5 to 10 mm/min).The possible appearance of the “boundary” effect is almost completely excluded (when the column is carefully packed) also when a small quantity of chemically treated silica gel dust is added to the above-mentioned material.Artificial mixtures of hydrocarbons containing olefins can be analyzed chromatographically (refractometric identification of the drops eluted) by a graphical method in which the surface tension is taken into account, giving a deviation from the calculated compositions of ±1.6% for mixtures 1, 2, and 3 and ±2.4% for mixture 4 (5).The agreement between parallel determinations, by elution and displacement chromatography, of the functional group composition of the products from the dehydrocracking of paraffinic hydrocarbons, is the basis for recommending the method described for evaluating the chromatograms by using averaged correction factors for treating the results of separating, by adsorption, small quantities of these products (initial loading from 1.0 to 2.0 $ cm^{3} $).By tests on individual hydrocarbons it was shown that by chemical treatment silica gels can be obtained which do not give rise to isomerization of straight-chain and substituted monoolefins under the conditions of displacement chromatography, even when the temperature during the separation is raised to 20°C. Industrial and experimental grades of silica gel not given a preliminary chemical treatment catalyze the isomerization of the aforementioned hydrocarbons under displacement chromatography conditions. Hydrocarbon Dehydrogenation Cracking Experimental Grade Hydrocarbon Mixture Lebedev, E. V. aut Manza, I. A. aut Enthalten in Chemistry and technology of fuels and oils Kluwer Academic Publishers-Plenum Publishers, 1966 1(1965), 2 vom: Feb., Seite 124-130 (DE-627)129592196 (DE-600)240238-5 (DE-576)015084906 0009-3092 nnns volume:1 year:1965 number:2 month:02 pages:124-130 https://doi.org/10.1007/BF00731418 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_11 GBV_ILN_70 GBV_ILN_2015 AR 1 1965 2 02 124-130 |
| allfieldsSound |
10.1007/BF00731418 doi (DE-627)OLC2049528795 (DE-He213)BF00731418-p DE-627 ger DE-627 rakwb eng 660 VZ Zakupra, V. A. verfasserin aut Chromatographic analysis of products from the cracking and dehydrogenation of paraffin hydrocarbons 1965 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Consultants Bureau 1966 Conclusions For the analysis by displacement chromatography of the products from the cracking and dehydrogenation of paraffinic hydrocarbons boiling up to 240°C the following can be recommended: medium porosity KSS-4 silica gel (subjected to preliminary chemical treatment), grain size 100 to 200 mesh;a two-stage glass microcolumn of 100 cm length and 20 $ cm^{3} $ volume, which, with an adsorbate: adsorbent ratio of 0.6-0.1, ensures a sufficiently sharp separation of the paraffinic, olefinic, and aromatic hydrocarbons.Under these conditions, it is not necessary to keep the overpressure above 1.4 atm in the glass delivery bottle in order to maintain the optimum flowrate of hydrocarbon mixture through the adsorbent (from 5 to 10 mm/min).The possible appearance of the “boundary” effect is almost completely excluded (when the column is carefully packed) also when a small quantity of chemically treated silica gel dust is added to the above-mentioned material.Artificial mixtures of hydrocarbons containing olefins can be analyzed chromatographically (refractometric identification of the drops eluted) by a graphical method in which the surface tension is taken into account, giving a deviation from the calculated compositions of ±1.6% for mixtures 1, 2, and 3 and ±2.4% for mixture 4 (5).The agreement between parallel determinations, by elution and displacement chromatography, of the functional group composition of the products from the dehydrocracking of paraffinic hydrocarbons, is the basis for recommending the method described for evaluating the chromatograms by using averaged correction factors for treating the results of separating, by adsorption, small quantities of these products (initial loading from 1.0 to 2.0 $ cm^{3} $).By tests on individual hydrocarbons it was shown that by chemical treatment silica gels can be obtained which do not give rise to isomerization of straight-chain and substituted monoolefins under the conditions of displacement chromatography, even when the temperature during the separation is raised to 20°C. Industrial and experimental grades of silica gel not given a preliminary chemical treatment catalyze the isomerization of the aforementioned hydrocarbons under displacement chromatography conditions. Hydrocarbon Dehydrogenation Cracking Experimental Grade Hydrocarbon Mixture Lebedev, E. V. aut Manza, I. A. aut Enthalten in Chemistry and technology of fuels and oils Kluwer Academic Publishers-Plenum Publishers, 1966 1(1965), 2 vom: Feb., Seite 124-130 (DE-627)129592196 (DE-600)240238-5 (DE-576)015084906 0009-3092 nnns volume:1 year:1965 number:2 month:02 pages:124-130 https://doi.org/10.1007/BF00731418 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_11 GBV_ILN_70 GBV_ILN_2015 AR 1 1965 2 02 124-130 |
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Enthalten in Chemistry and technology of fuels and oils 1(1965), 2 vom: Feb., Seite 124-130 volume:1 year:1965 number:2 month:02 pages:124-130 |
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A.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Chromatographic analysis of products from the cracking and dehydrogenation of paraffin hydrocarbons</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">1965</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">ohne Hilfsmittel zu benutzen</subfield><subfield code="b">n</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Band</subfield><subfield code="b">nc</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="500" ind1=" " ind2=" "><subfield code="a">© Consultants Bureau 1966</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Conclusions For the analysis by displacement chromatography of the products from the cracking and dehydrogenation of paraffinic hydrocarbons boiling up to 240°C the following can be recommended: medium porosity KSS-4 silica gel (subjected to preliminary chemical treatment), grain size 100 to 200 mesh;a two-stage glass microcolumn of 100 cm length and 20 $ cm^{3} $ volume, which, with an adsorbate: adsorbent ratio of 0.6-0.1, ensures a sufficiently sharp separation of the paraffinic, olefinic, and aromatic hydrocarbons.Under these conditions, it is not necessary to keep the overpressure above 1.4 atm in the glass delivery bottle in order to maintain the optimum flowrate of hydrocarbon mixture through the adsorbent (from 5 to 10 mm/min).The possible appearance of the “boundary” effect is almost completely excluded (when the column is carefully packed) also when a small quantity of chemically treated silica gel dust is added to the above-mentioned material.Artificial mixtures of hydrocarbons containing olefins can be analyzed chromatographically (refractometric identification of the drops eluted) by a graphical method in which the surface tension is taken into account, giving a deviation from the calculated compositions of ±1.6% for mixtures 1, 2, and 3 and ±2.4% for mixture 4 (5).The agreement between parallel determinations, by elution and displacement chromatography, of the functional group composition of the products from the dehydrocracking of paraffinic hydrocarbons, is the basis for recommending the method described for evaluating the chromatograms by using averaged correction factors for treating the results of separating, by adsorption, small quantities of these products (initial loading from 1.0 to 2.0 $ cm^{3} $).By tests on individual hydrocarbons it was shown that by chemical treatment silica gels can be obtained which do not give rise to isomerization of straight-chain and substituted monoolefins under the conditions of displacement chromatography, even when the temperature during the separation is raised to 20°C. 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A.</subfield><subfield code="4">aut</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Chemistry and technology of fuels and oils</subfield><subfield code="d">Kluwer Academic Publishers-Plenum Publishers, 1966</subfield><subfield code="g">1(1965), 2 vom: Feb., Seite 124-130</subfield><subfield code="w">(DE-627)129592196</subfield><subfield code="w">(DE-600)240238-5</subfield><subfield code="w">(DE-576)015084906</subfield><subfield code="x">0009-3092</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:1</subfield><subfield code="g">year:1965</subfield><subfield code="g">number:2</subfield><subfield code="g">month:02</subfield><subfield code="g">pages:124-130</subfield></datafield><datafield tag="856" ind1="4" ind2="1"><subfield code="u">https://doi.org/10.1007/BF00731418</subfield><subfield code="z">lizenzpflichtig</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_OLC</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-TEC</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-CHE</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-PHA</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-DE-84</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_11</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_70</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2015</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">1</subfield><subfield code="j">1965</subfield><subfield code="e">2</subfield><subfield code="c">02</subfield><subfield code="h">124-130</subfield></datafield></record></collection>
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Zakupra, V. A. |
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Zakupra, V. A. ddc 660 misc Hydrocarbon misc Dehydrogenation misc Cracking misc Experimental Grade misc Hydrocarbon Mixture Chromatographic analysis of products from the cracking and dehydrogenation of paraffin hydrocarbons |
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660 VZ Chromatographic analysis of products from the cracking and dehydrogenation of paraffin hydrocarbons Hydrocarbon Dehydrogenation Cracking Experimental Grade Hydrocarbon Mixture |
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ddc 660 misc Hydrocarbon misc Dehydrogenation misc Cracking misc Experimental Grade misc Hydrocarbon Mixture |
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ddc 660 misc Hydrocarbon misc Dehydrogenation misc Cracking misc Experimental Grade misc Hydrocarbon Mixture |
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ddc 660 misc Hydrocarbon misc Dehydrogenation misc Cracking misc Experimental Grade misc Hydrocarbon Mixture |
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Chromatographic analysis of products from the cracking and dehydrogenation of paraffin hydrocarbons |
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Chromatographic analysis of products from the cracking and dehydrogenation of paraffin hydrocarbons |
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Zakupra, V. A. |
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Chemistry and technology of fuels and oils |
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Chemistry and technology of fuels and oils |
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1965 |
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Zakupra, V. A. Lebedev, E. V. Manza, I. A. |
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Zakupra, V. A. |
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10.1007/BF00731418 |
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660 |
| title_sort |
chromatographic analysis of products from the cracking and dehydrogenation of paraffin hydrocarbons |
| title_auth |
Chromatographic analysis of products from the cracking and dehydrogenation of paraffin hydrocarbons |
| abstract |
Conclusions For the analysis by displacement chromatography of the products from the cracking and dehydrogenation of paraffinic hydrocarbons boiling up to 240°C the following can be recommended: medium porosity KSS-4 silica gel (subjected to preliminary chemical treatment), grain size 100 to 200 mesh;a two-stage glass microcolumn of 100 cm length and 20 $ cm^{3} $ volume, which, with an adsorbate: adsorbent ratio of 0.6-0.1, ensures a sufficiently sharp separation of the paraffinic, olefinic, and aromatic hydrocarbons.Under these conditions, it is not necessary to keep the overpressure above 1.4 atm in the glass delivery bottle in order to maintain the optimum flowrate of hydrocarbon mixture through the adsorbent (from 5 to 10 mm/min).The possible appearance of the “boundary” effect is almost completely excluded (when the column is carefully packed) also when a small quantity of chemically treated silica gel dust is added to the above-mentioned material.Artificial mixtures of hydrocarbons containing olefins can be analyzed chromatographically (refractometric identification of the drops eluted) by a graphical method in which the surface tension is taken into account, giving a deviation from the calculated compositions of ±1.6% for mixtures 1, 2, and 3 and ±2.4% for mixture 4 (5).The agreement between parallel determinations, by elution and displacement chromatography, of the functional group composition of the products from the dehydrocracking of paraffinic hydrocarbons, is the basis for recommending the method described for evaluating the chromatograms by using averaged correction factors for treating the results of separating, by adsorption, small quantities of these products (initial loading from 1.0 to 2.0 $ cm^{3} $).By tests on individual hydrocarbons it was shown that by chemical treatment silica gels can be obtained which do not give rise to isomerization of straight-chain and substituted monoolefins under the conditions of displacement chromatography, even when the temperature during the separation is raised to 20°C. Industrial and experimental grades of silica gel not given a preliminary chemical treatment catalyze the isomerization of the aforementioned hydrocarbons under displacement chromatography conditions. © Consultants Bureau 1966 |
| abstractGer |
Conclusions For the analysis by displacement chromatography of the products from the cracking and dehydrogenation of paraffinic hydrocarbons boiling up to 240°C the following can be recommended: medium porosity KSS-4 silica gel (subjected to preliminary chemical treatment), grain size 100 to 200 mesh;a two-stage glass microcolumn of 100 cm length and 20 $ cm^{3} $ volume, which, with an adsorbate: adsorbent ratio of 0.6-0.1, ensures a sufficiently sharp separation of the paraffinic, olefinic, and aromatic hydrocarbons.Under these conditions, it is not necessary to keep the overpressure above 1.4 atm in the glass delivery bottle in order to maintain the optimum flowrate of hydrocarbon mixture through the adsorbent (from 5 to 10 mm/min).The possible appearance of the “boundary” effect is almost completely excluded (when the column is carefully packed) also when a small quantity of chemically treated silica gel dust is added to the above-mentioned material.Artificial mixtures of hydrocarbons containing olefins can be analyzed chromatographically (refractometric identification of the drops eluted) by a graphical method in which the surface tension is taken into account, giving a deviation from the calculated compositions of ±1.6% for mixtures 1, 2, and 3 and ±2.4% for mixture 4 (5).The agreement between parallel determinations, by elution and displacement chromatography, of the functional group composition of the products from the dehydrocracking of paraffinic hydrocarbons, is the basis for recommending the method described for evaluating the chromatograms by using averaged correction factors for treating the results of separating, by adsorption, small quantities of these products (initial loading from 1.0 to 2.0 $ cm^{3} $).By tests on individual hydrocarbons it was shown that by chemical treatment silica gels can be obtained which do not give rise to isomerization of straight-chain and substituted monoolefins under the conditions of displacement chromatography, even when the temperature during the separation is raised to 20°C. Industrial and experimental grades of silica gel not given a preliminary chemical treatment catalyze the isomerization of the aforementioned hydrocarbons under displacement chromatography conditions. © Consultants Bureau 1966 |
| abstract_unstemmed |
Conclusions For the analysis by displacement chromatography of the products from the cracking and dehydrogenation of paraffinic hydrocarbons boiling up to 240°C the following can be recommended: medium porosity KSS-4 silica gel (subjected to preliminary chemical treatment), grain size 100 to 200 mesh;a two-stage glass microcolumn of 100 cm length and 20 $ cm^{3} $ volume, which, with an adsorbate: adsorbent ratio of 0.6-0.1, ensures a sufficiently sharp separation of the paraffinic, olefinic, and aromatic hydrocarbons.Under these conditions, it is not necessary to keep the overpressure above 1.4 atm in the glass delivery bottle in order to maintain the optimum flowrate of hydrocarbon mixture through the adsorbent (from 5 to 10 mm/min).The possible appearance of the “boundary” effect is almost completely excluded (when the column is carefully packed) also when a small quantity of chemically treated silica gel dust is added to the above-mentioned material.Artificial mixtures of hydrocarbons containing olefins can be analyzed chromatographically (refractometric identification of the drops eluted) by a graphical method in which the surface tension is taken into account, giving a deviation from the calculated compositions of ±1.6% for mixtures 1, 2, and 3 and ±2.4% for mixture 4 (5).The agreement between parallel determinations, by elution and displacement chromatography, of the functional group composition of the products from the dehydrocracking of paraffinic hydrocarbons, is the basis for recommending the method described for evaluating the chromatograms by using averaged correction factors for treating the results of separating, by adsorption, small quantities of these products (initial loading from 1.0 to 2.0 $ cm^{3} $).By tests on individual hydrocarbons it was shown that by chemical treatment silica gels can be obtained which do not give rise to isomerization of straight-chain and substituted monoolefins under the conditions of displacement chromatography, even when the temperature during the separation is raised to 20°C. Industrial and experimental grades of silica gel not given a preliminary chemical treatment catalyze the isomerization of the aforementioned hydrocarbons under displacement chromatography conditions. © Consultants Bureau 1966 |
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