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SUPERCRITICAL CO2 EXTRACTION OF LIPIDS

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SUPERCRITICAL CO2 EXTRACTION OF LIPIDS ( supercritical-co2-extraction-lipids )

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UnitedStatesPatent [19] Friedrich [54] SUPERCRITICALCO2EXTRACTIONOF LIPIDSFROMLIPID-CONTAINING‘ MATERIALS [75] Inventor: JohnP.Friedrich,GreenValley,Il. [73] Assignee: TheUnitedStatesofAmericaas represented by the Secretary of Agriculture, Washington, DC. [21] Appl.No.: 364,290 [22] Filed: Apr.1,1982 4,466,923 [51] Int.01.1.............................................(311B11/00 Johnstonetal.,“AnAnalyticalCarnahan-Starling-van [52] US.Cl...260/4124;260/4107; derWallsModelforSolubilityofHydrocarbonSolids 260/4128;260/4285 inSupercriticalFluids,”AIChEJournal27(5):773-779, [58] FieldofSearch..260/4107,412.4,412.8, 260/4285 [56] ReferencesCited U.S.PATENTDOCUMENTS (Sep.1981). I Hubert et al., “Extraction with Supercritical Gases,” G. M. Schneider/E. Stahl/G. Wilke, eds, Verlag Chemie, Deer?eld Beach, FL, 1980, pp. 27-28. Stahl et al., “A Quick Method for the Microanalytical Evaluation of the Dissolving Power of Supercritical Gases,” Angew, Chem. Int. Ed. Engl. 17: 731-738, (1978). Primary Examiner—Thomas A. Waltz Attorney,Agent,orFirm-M. Howard Silverstein; DavidG.McConnell;CurtisP.Ribando [57] ABSTRACT In the extraction of lipid-containing substances with supercriticalCO2, triglyceridesolubilitiesofup to20% or more are obtainable by the simultaneous application of temperatures in excess of about 60° C. and pressures of at least 550 bar. 7 Claims, 2 Drawing Figures 3,843,824 10/1974 3,939,281 2/1976 4,168,324 9/1979 4,280,961 7/1981 4,331,695 5/1982 4,367,178 1/1983 Roseliuseta1.....................426/386 Schwengers ................. 426/11 Roseliuseta1.................426/312 Schneider et al. . ..... 260/4128 Zosel ................. .260/4128 X Heigeletal...260/4124X FOREIGN PATENT DOCUMENTS 2709033 9/1978 Fed. Rep. ofGermany . 1356749 6/1974 United Kingdom . 1356750 6/1974 United Kingdom . 2091292 7/1982 United Kingdom ..260/4124 OTHER PUBLICATIONS Stahl et al., “Extraktion von Lupinentil mit iiberkritis chem Kohlendioxid,” Fette, Seifen, Anstrichmittel 83(12):472-474,(1981). Stahl et al., “Extraction of Seed Oils with Liquid and [1] PatentNumber: [45] DateofPatent: Aug.21,1984 SupercriticalCarbonDioxide,”J.Agr.FoodChem. 28(6):1153-1157,(1980). Caragayetal.,“SupercriticalFluidExtractionforPuri ?cation and Fractionation of Fats and Oils,” presented at 72nd Annual Meeting of American Oil Chemists Society,NewOrleans,LA,May 18,1981,pp.1,18-24, & 27-32. Brunner et al., “The State of the Art of Extraction with Compressed Gases,” Lecture presented at Annual Meeting of Process Engineers, Strassburg, Oct. 1-3, 1980,pp.1,8-12,14,34,& 35.

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