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4,466,923 78 TABLE II-continued Solubility(wt.%)“ 40' C. 50' C. 55' C. 60° C. 70° C. 80° C. (Ex.1-7) (Ex.3-17) (Ex.18-20) (Ex.21-31) (Ex.3242) (Ex.43-48) Pressure (bar) 551 sea - —- — __ 620 2.21 3.13 - 665 - - 3.93 3_‘93 689 _ 3'47 “ 4.90 7“ _ “ '“ - 7582.583.83_ b 5.39 189 _ _ 517 ' 132 6_'61 6.51 8.75 - 1442 ‘ 8.08 _ 1.95 2.70 _ 331 802-———- b - 30.95 ‘B _ 812 - — — _ 1376 — 827 _ _ 5'13 6.70” 354 — _ _ _ 20.70 _ 4329'“ - _' __ _ __ _ _ s95 _ 964 _ 1033 2.94 4.821’ -_ 4.61" 5.82 4.731’ - 7 59,, 1b 06,, 14‘i6,, 'l‘he solubilities within the enclosure represent extraction conditions corresponding to the scope of the invention. bFlow of CO2 solvent was upward through the extractor. ‘These values represent the weight relationship between extracted oil and CO2 solventI but not necessarily the actual solubility. Iclaim: 1.A methodfortheextractionofalipidfromalipid containing material by means of a carbon dioxide sol vent under supercritical conditions, said method com prising: a.contactingsaidlipid-containingmaterialwithcar bon dioxide at a pressure within the range of at least 550 bar and a temperature within the range of about 60° to 100° C. in order to dissolve the lipid in the carbon dioxide, whereby the combination of pressure and temperature is sufficient for the solu bility of said lipid in said carbon dioxide to be at leastabout5%byweight;and b. separating said carbon dioxide with the dissolved lipid from said material. 45 55 65 2.A methodasdescribedinclaim1whereinsaidlipid is a vegetable oil and said lipid-containing material is a vegetable seed or vegetable seed component. 3. A method as described in claim 2 wherein said lipid-containing material isan oilseed. 4.A methodasdescribedinclaim2whereinsaid lipid-containing material isa cereal seed germ. 5.A methodasdescribedinclaim1whereinsaidlipid is an animal fat and said lipid-containing material is of animal origin. 6. A method as described in claim 1 wherein said pressure is in the range of 700-1200 bar. 7.A methodasdescribedinclaim1whereinsaid temperature is in the range of 60°—80° C. * * * l! * 25 30 35PDF Image | SUPERCRITICAL CO2 EXTRACTION OF LIPIDS
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