Method of treating soybean oil

• US 3,069,443 A
• Filed: 09/17/1959
• Issued: 12/18/1962
• Est. Priority Date: 09/17/1959
• Status: Expired due to Term

• Current Assignee: Endre Sipos, Norman H. Witte
• Original Assignee: Endre Sipos, Norman H. Witte
• Inventors: Witte, Norman H., ENDRE SIPOS
• Application Number:
  US03/840,718
• Time in Patent Office: 1,188 Days
• US Class Current: 554/206
• CPC Class Codes: A23K 20/179 Colouring agents, e.g. pigmenting or dyeing agents
• CPC Class Codes: A23L 5/44 using carotenoids or xanthophylls
• CPC Class Codes: C11B 3/006 by extraction

Claims

1. THE METHOD OF TREATING SOYBEAN OIL TO IMPROVE ITS QUALITY AND TO RECOVER A XANTHOPHYLL CONCENTRATE AS A BY-PRODUCT, COMPRISING EXTRACTING CRUDE DEGUMMED SOYBEAN OIL CONTAINING XANTHOPHYLL WITH METHANOL AT A TEMPERATURE ABOVE 40*F, UP TO ABOUT 140*F., THE EXTRACTION SYSTEM INCLUDING SAID METHANOL AND SAID SOYBEAN OIL CONTAINING LESS THAN 1 PERCENT WATER BY WEIGHT DURING SAID EXTRACTION, CONTINUING SAID EXTRACTION UNTIL AT LEAST A MAJOR PORTION OF THE XANTHOPHYLL HAS BEEN EXTRACTED INTO THE METHANOL PHASE WHILE SAID METHANOL PHASE CONTAINS LESS THAN 2% BY WEIGHT OF THE TRIGLYCERIDES OF SAID SOYBEAN OIL, SEPARATING THE XANTHOPHYLL-CONTAINING METHANOL PHASE FROM THE OIL PHASE, REMOVING THE METHANOL FROM THE EXTRACTED MATERIAL IN SAID METHANOL PHASE TO OBTAIN A XANTHOPHYLL CONCENTRATE, AND ALSO REMOVING THE METHANOL FROM THE OIL PHASE TO OBTAIN A SOYBEAN OIL PRODUCT OF IMPROVED QUANLITY.