发明公开
- 专利标题: RECOVERY OF TOCOPHEROLS
- 专利标题(中): 生殖细胞的恢复
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申请号: EP96945568.0申请日: 1996-12-06
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公开(公告)号: EP0866789A1公开(公告)日: 1998-09-30
- 发明人: HUNT, Tracy, K. , SCHWARZER, Joerg
- 申请人: HENKEL CORPORATION
- 申请人地址: 140 Germantown Avenue, Suite 150 Plymouth Meeting, PA 19462 US
- 专利权人: HENKEL CORPORATION
- 当前专利权人: HENKEL CORPORATION
- 当前专利权人地址: 140 Germantown Avenue, Suite 150 Plymouth Meeting, PA 19462 US
- 代理机构: von Kreisler, Alek, Dipl.-Chem., et al
- 优先权: US19950008762P 19951213; US19960753460 19961125
- 国际公布: WO1997021697 19970619
- 主分类号: C07D311
- IPC分类号: C07D311
摘要:
Starting from a mixture containing tocopherol, fats and/or fat derivatives, more particularly fatty acids, and optionally sterol and/or sterol derivatives, the free fatty acids present in the mixture are esterified with an alcohol and fatty glycerides are transesterified with an alcohol in the presence of a zinc oxide and/or zinc hydroxide catalyst. After the esterifications, the excess lower alcohol is distilled off from the reaction mixture. The transesterification catalyst and the glycerol present, if any, are removed and the fatty acid alkyl ester is distilled off from the mixture. Distillation of fatty acid alkyl esters can be accomplished with a packed column in sequence with a wiped film evaporator. The simultaneous recovery of tocopherol and sterol is possible. Tocopherols and sterols can be separated by the crystallization of sterols from a blend of organic solvents.
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