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Studies in soap crystallization processes. Part III. Acid soap crystallization in the segregation of tall oil fatty acids
Author(s) -
Meade Edwin M.
Publication year - 1962
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02631699
Subject(s) - chemistry , oleic acid , crystallization , acetone , organic chemistry , solvent , methanol , linoleic acid , fatty acid , biochemistry
Tall oil fatty acids have been fractionated into 80舑90% oleic acid, and 60舑80% linoleic acid fractions, by precipitation of the oleic acid as acid soap from polar solvents. Sodium and potassium acid soaps are equally effective, but ammonium acid soaps require lower operating temperatures. The choice of solvent is not critical as regards degree of separation, but technically attractive filtration rates have been obtained only with methanol and acetone. Acidulation gives colorless oleic acid of very low rosin acid and unsaponifiable content, but with 5舑10% of conjugated linoleic acid.