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Selective reduction of the unsaturated compounds
Author(s) -
Khan N. A.
Publication year - 1953
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/bf02639919
Subject(s) - autoxidation , induction period , oleic acid , distillation , chemistry , impurity , crystallization , organic chemistry , unsaturated fatty acid , isolation (microbiology) , fatty acid , chromatography , catalysis , biochemistry , biology , microbiology and biotechnology
Summary Oleic acid and methyl oleate, free of the offending dienoic and trienoic impurities, have been obtained by synthesis and isolation from natural sources. The synthetic method involved selective hydrogenation of stearolic acid and its methyl ester. An isolation method combining the usual crystallization and fractional distillation procedures with a mild and selective hydrogenation step has been developed. These substances exhibited consistent properties. Autoxidation studies showed that the induction period is characteristic of these pure fatty materials and markedly affected by the traces of dienoic and trienoic impurities. An explanation for such induction period has also been offered.