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Method for manufacturing high quality fatty acid esters

  • US 4,371,470 A
  • Filed: 02/18/1981
  • Issued: 02/01/1983
  • Est. Priority Date: 02/28/1980
  • Status: Expired due to Fees
First Claim
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1. A method for the preparation of a high-quality lower alkyl ester of a fatty acid which comprises the steps of(a) esterifying a fatty acid glyceride by a first alcoholysis reaction with a lower alcohol in the presence of an alkali catalyst to form a first crude esterification product and glycerine,(b) separating the glycerine from the first crude esterification product,(c) esterifying the first crude esterification product by a second alcoholysis reaction with the lower alcohol in the presence of an alkali catalyst to form a second esterification product containing the unreacted lower alcohol and glycerine as dissolved or dispersed therein,(d) admixing the second crude esterification product with water in an amount from 30% to 150% by weight based on the amount of the lower alcohol contained in the second crude esterification product,(e) subjecting the second crude esterification product admixed with water to phase separation into the aqueous layer and layer of the lower alkyl ester of fatty acid,(f) stripping the lower alkyl ester of fatty acid of the water and unreacted lower alcohol contained therein,(g) admixing the thus stripped lower alkyl ester of fatty acid with from 1 to 10% by weight of an adsorbent to effect decolorization, and(h) removing the adsorbent from the thus decolorized lower alkyl ester of fatty acid.

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