Chemistry: natural resins or derivatives; peptides or proteins; – Natural resins or derivatives – Recovery of tall oil or derivatives from papermaking waste,...
Patent
1989-11-01
1991-07-23
Elmore, Carolyn S.
Chemistry: natural resins or derivatives; peptides or proteins;
Natural resins or derivatives
Recovery of tall oil or derivatives from papermaking waste,...
260419, 260420, 562494, 562593, C09F 102, C11B 500, C07C 6306, C07C 5514
Patent
active
050345095
ABSTRACT:
The invention relates to a method for improving the color and the stability of the color of carboxylic acid or a mixture of the same by treating the carboxylic acid or its mixture with a hydride-yielding substance at an elevated temperature and by distilling the mixture thus obtained. The color and the stability of the color of the distillate thus obtained are better than the corresponding quantities of a distillate of untreated carboxylic acid or an untreated mixture of the same. Sodium borohydride and lithium aluminum hydride are preferred hydride-yielding substances. The method according to the invention can be applied to all carboxylic acids, advantageously to fatty acids and resin acids.
REFERENCES:
patent: 2374975 (1945-05-01), Borglin
patent: 3168569 (1965-02-01), Matell
patent: 3377333 (1968-04-01), Ciesielski et al.
patent: 3551404 (1970-12-01), Watkins
patent: 3804819 (1974-04-01), Wengrow et al.
patent: 4126604 (1978-11-01), Alford et al.
patent: 4222933 (1980-09-01), Alford
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