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AssigneeYoshikawa Oil & Fat Co., Ltd.
InventorsToshiyuki Kawasaki, Isao Kato, Kenji Noda, Masakatsu Osaki, Katsuhiko Miyazaki, Hidekazu Nayeshiro, Hideya Ando
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The invention provides a process comprising treating a lanolin fatty acid with boric acid to convert hydroxy fatty acids therein to boric acid esters, subjecting the reaction mixture to vacuum distillation to fractionate the boric acid esters of hydroxy fatty acids from non-hydroxy fatty acids, hydrolyzing the boric acid esters, and subjecting the hydrolysate to vacuum distillation to provide .alpha.-hydroxy fatty acids and .omega.-hydroxy fatty acids, the resultant respective lanolin fatty acids and esters, and cosmetic products and drug products for external use containing them. According to the invention, pale-colored, substantially odor-free lanolin fatty acids can be obtained easily and with high efficiency and these compounds can be effectively utilized in the pharmaceutical and cosmetic field.
A process for producing purified hydroxy fatty acids or C.sub.1-4 lower alcohol esters thereof and purified non-hydroxy fatty acids or C.sub.1-4 lower alcohol esters thereof from lanolin fatty acids comprising the steps of:
A composition comprising non-hydroxy fatty acids or C.sub.1-4 lower alcohol esters thereof obtained from lanolin fatty acids, having a hydroxy fatty acid content of less than 10% by weight, comprising 30-45% by weight of C.sub.10-30 iso-fatty acids or C.sub.1-4 lower alcohol esters thereof, 30-50% by weight of C.sub.11-31 anteiso-fatty acids or C.sub.1-4 lower alcohol esters thereof and 10-30% by weight of C.sub.10-30 normal-fatty acids or C.sub.1-4 lower alcohol esters thereof, the amount of the iso-fatty acids or C.sub.1-4 lower alcohol esters thereof and anteiso-fatty acids or C.sub.1-4 lower alcohol esters thereof being at least 60% by weight of the composition.
A composition comprising hydroxy fatty acids or C.sub.1-4 lower alcohol esters thereof obtained from lanolin fatty acids, having an .omega.-hydroxy fatty acid content of 0-15%, and at least 60% by weight of .alpha.-hydroxy fatty acids or C.sub.1-4 lower alcohol esters thereof having not less than 14 carbon atoms;
Dependencies are inferred from the claim text.