Solvent fractionation of fatty material

Claim 1

A METHOD OF PRODUCING A RELATIVELY NONREVERTING SOYBEAN OIL HAVING SUBSTANTIALLY IMPROVED ODOR AND FLAVOR CHARACTERISTICS, WHICH COMPRISES: CONTACTING IN A FRACTIONATING ZONE A CRUDE SOYBEAN OIL HAVING POOR FLAVOR AND ODOR STABILITY AND CONTAINING COLOR BODIES AND OTHER NONSAPONIFIABLE IMPURITIES WITH FROM 10 TO 20 TIMES ITS VOLUME OF LIQUEFIED NORMALLY GASEOUS HYDROCARBON AT A TEMPERATURE OF BETWEEN APPROXIMATELY 155* AND 170* F. AND AT A PRESSURE OF BETWEEN APPROXIMATELY 400 AND 475 POUNDS PER SQUARE INCH TO FORM UPPER AND LOWER PHASES, THE LOWER OF SAID PHASES CONTAINING BETWEEN 2 AND 5 PER CENT OF THE CRUDE SOYBEAN OIL HAVING INCLUDED THEREIN SUBSTANTIALLY ALL THE COLOR BODY IMPURITIES, AND THE UPPER OF SAID PHASES COMPRISING THE REMAINDER OF THE UNIMPROVED SOYBEAN OIL SUBSTANTIALLY FREE OF COLOR BODIES; CONTACTING THE UPPER OF SAID PHASES WITH ADDITIONAL LIQUEFIED NORMALLY GASEOUS HYDROCARBON IN A FRACTIONATING ZONE TO INCREASE THE HYDROCARBON-OIL RATIO OF BETWEEN 15:1 AND 100:1 AND AT A PRESSURE OF BETWEEN APPROXIMATELY 540 TO 630 POUNDS PER SQUARE INCH AT A TEMPERATURE BETWEEN ABOUT 185* AND 207*F. TO FORM UPPER AND LOWER PHASES, THE UPPER OF SAID PHASES COMPRISING APPROXIMATELY 1 TO 2 PER CENT OF THE SOYBEAN OIL, AND THE LOWER OF SAID PHASES CONTAINING THE REMAINDER OF THE SOYBEAN OIL INCLUDING THEREIN SUBSTANTIAL AMOUNTS OF THE UNSAPONIFIABLE IMPURITIES; CONTACTING THE LOWER OF SAID PHASES CONTAINING THE MAJOR PROPORTION OF THE SOYBEAN OIL WITH ADDITIONAL LIQUEFIED NORMALLY GASEOUS HYDROCARBON SUFFICIENT TO INCREASE THE HYDROCARBON-OIL RATIO TO BETWEEN APPROXIMATELY 15:1 AND 30:1 AT A TEMPERATURE OF BETWEEN APPROXIMATELY 180* AND 195*F. AND A PRESSURE OF BETWEEN APPROXIMATELY 510 AND 590 POUNDS PER SQUARE INCH TO FORM UPPER AND LOWER PHASES, THE UPPER OF SAID PHASES COMPRISING A HYDROCARBON SOLUTION OF BETWEEN 7 TO 15 PER CENT OF THE SOYBEAN OIL HAVING INCLUDED THEREIN SUBSTANTIALLY ALL THE NONSAPONIFIABLE IMPURITIES REMAINING IN THE SOYBEAN OIL, AND THE LOWER OF SAID FRACTIONS COMPRISING A RELATIVELY NONREVERTING SOYBEAN OIL SUBSTANTIALLY FREE OF NONSAPONIFIABLE IMPURITIES; AND RECOVERING THE LOWER OF SAID PHASES SUBSTANTIALLY FREE OF HYDROCARBON AND IMPURITIES, WHEREBY A RELATIVELY NONREVERTING SOYBEAN OIL HAVING GREATLY IMPROVED FLAVOR AND ODOR CHARACTERISTICS IS OBTAINED.

Claim 2

A METHOD OF PRODUCING A RELATIVELY NONREVERTING SOYBEAN OIL HAVING SUBSTANTIALLY IMPROVED ODOR AND FLAVOR CHARACTERISTICS, WHICH COMPRISES: CONTACTING IN A FRACTIONATING ZONE A CRUDE SOYBEAN OIL HAVING POOR FLAVOR AND ODOR STABILITY AND CONTAINING COLOR BODIES AND OTHER NONSAPONIFIABLE IMPURITIES WITH FROM 10 TO 20 TIMES ITS VOLUME OF LIQUEFIED NORMALLY GASEOUS HYDROCARBON AT A TEMPERATURE OF BETWEEN APPROXIMATELY 155* AND 170* F. AND AT A PRESSURE OF BETWEEN APPROXIMATELY 400 AND 475 POUNDS PER SQUARE INCH TO FORM UPPER AND LOWER PHASES, THE LOWER OF SAID PHASES CONTAINING BETWEEN 2 AND 5 PER CENT OF THE CRUDE SOYBEAN OIL HAVING INCLUDED THEREIN SUBSTANTIALLY ALL THE COLOR BODY IMPURITIES, AND THE UPPER OF SAID PHASES COMPRISING THE REMAINDER OF THE UNIMPROVED SOYBEAN OIL SUBSTANTIALLY FREE OF COLOR BODIES; CONTACTING THE UPPER OF SAID PHASES WITH ADDITIONAL LIQUEFIED NORMALLY GASEOUS HYDROCARBON IN A FRACTIONATING ZONE TO INCREASE THE HYDROCARBON-OIL RATIO OF BETWEEN 15:1 AND 100:1 AND AT A PRESSURE OF BETWEEN APPROXIMATELY 540 TO 630 POUNDS PER SQUARE INCH AT A TEMPERATURE BETWEEN ABOUT 185* AND 207*F. TO FORM UPPER AND LOWER PHASES, THE UPPER OF SAID PHASES COMPRISING APPROXIMATELY 1 TO 2 PER CENT OF THE SOYBEAN OIL, AND THE LOWER OF SAID PHASES CONTAINING THE REMAINDER OF THE SOYBEAN OIL INCLUDING THEREIN SUBSTANTIAL AMOUNTS OF THE UNSAPONIFIABLE IMPURITIES; CONTACTING THE LOWER OF SAID PHASES CONTAINING THE MAJOR PROPORTION OF THE SOYBEAN OIL WITH ADDITIONAL LIQUEFIED NORMALLY GASEOUS HYDROCARBON SUFFICIENT TO INCREASE THE HYDROCARBON-OIL RATIO TO BETWEEN APPROXIMATELY 15:1 AND 30:1 AT A TEMPERATURE OF BETWEEN APPROXIMATELY 180* AND 195*F. AND A PRESSURE OF BETWEEN APPROXIMATELY 510 AND 590 POUNDS PER SQUARE INCH TO FORM UPPER AND LOWER PHASES, THE UPPER OF SAID PHASES COMPRISING A HYDROCARBON SOLUTION OF BETWEEN 7 TO 15 PER CENT OF THE SOYBEAN OIL HAVING INCLUDED THEREIN SUBSTANTIALLY ALL THE NONSAPONIFIABLE IMPURITIES REMAINING IN THE SOYBEAN OIL, AND THE LOWER OF SAID FRACTIONS COMPRISING A RELATIVELY NONREVERTING SOYBEAN OIL SUBSTANTIALLY FREE OF NONSAPONIFIABLE IMPURITIES; AND RECOVERING THE LOWER OF SAID PHASES SUBSTANTIALLY FREE OF HYDROCARBON AND IMPURITIES, WHEREBY A RELATIVELY NONREVERTING SOYBEAN OIL HAVING GREATLY IMPROVED FLAVOR AND ODOR CHARACTERISTICS IS OBTAINED.