Chemistry of hydrocarbon compounds – Purification – separation – or recovery – By contact with solid sorbent
Patent
1992-09-22
1994-09-06
McFarlane, Anthony
Chemistry of hydrocarbon compounds
Purification, separation, or recovery
By contact with solid sorbent
585826, 208310R, C07C 712, C10G 2500
Patent
active
053450299
ABSTRACT:
Hydrocarbon oils such as diesel fuels, turbine fuels and intermediate distillates may be subjected to quantitative analysis of their saturate, aromatic and polar components by supercritical fluid chromatography using carbon dioxide as the solvent. A sample of the oil is passed into a packed column of silica or the like whereby the respective fractions are separated and retained on the column. Supercritical carbon dioxide at selected pressure and temperature conditions is passed through the column to extract, separately, each of the fractions retained on the column. The extracted fraction and solvent are passed through a restrictor and expanded down to a pressure which will allow the solvent to evaporate and to permit retention or collection of the extracted fraction in a collector arrangement including a selector valve and plural collection containers. Supercritical carbon dioxide is supplied to the column through an injector valve by way of a pump which may be operated to provide the solvent fluid at a selected pressure in accordance with the fraction to be extracted.
REFERENCES:
patent: 4124528 (1978-11-01), Modell
patent: 4375387 (1983-03-01), de Filippi et al.
"Standard Test Method for Characteristic Groups in Rubber Extender and Processing Oils and Other Petroleum Derived Oils by the Clay-Gel Absorption Chromatographic Method", American Society for Testing and Materials, Designation: D 2007--91, 1991. (page unavailable).
"Standard Test Method for Separation of Representative Aromatics and Nonaromatics Fractions of High-Boiling Oils by Elution Chromatography", American Society for Testing and Materials, Designation: D 2549--91, 1991. (page unavailable).
"Standard Test Method for Determination of Aromatic Content of Diesel Fuels by Supercritical Fluid Chromatography", American Society for Testing and Materials, Designation: D 5186--91,1991. (page unavailable).
Atlantic Richfield Company
Martin Michael E.
McFarlane Anthony
Phan Nhat D.
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