公开(公告)号：US4371470A

公开(公告)日：1983-02-01

申请号：US235577

申请日：1981-02-18

申请人： Tadaaki Matsukura ,  Yukio Nakagawa

发明人： Tadaaki Matsukura ,  Yukio Nakagawa

IPC分类号： C11C3/10 ,  C07C67/03 ,  C07C67/56 ,  C07C69/003 ,  C07C69/24 ,  C11C3/02 ,  C09F5/08

CPC分类号： C11C3/003 ,  C07C67/03 ,  C07C67/56 ,  C07C67/58

摘要： The invention provides a novel and very efficient method for the preparation of a high-quality lower alkyl, e.g. methyl, ester of a fatty acid in respects of color and odor which is suitable for the manufacture of high-grade soaps even without further purification by salting-out considered indispensable in the prior art processes. The inventive method utilizes a natural oil or fat as the starting material which is subjected to a two-step transesterification with methyl alcohol into a methyl ester of the fatty acid, from which the trace amounts of the colored or chromogenic impurities are removed by admixing an adsorbent. The types of the adsorbent as well as the temperature and the time for the adsorption are important for the effective decolorization. Best results were obtained with a mixture of an activated clay and an active carbon in a specified weight proportion.

摘要翻译： 本发明提供了一种制备高质量低级烷基的新型和非常有效的方法，例如， 甲基，脂肪酸的酯在颜色和气味方面，其适用于制造高级肥皂，甚至不需要通过现有技术方法中必不可少的盐析进一步纯化。 本发明的方法利用天然油或脂肪作为原料，将其与甲醇进行两步酯交换反应，制成脂肪酸的甲基酯，通过混合痕量的有色或显色杂质 吸附剂。 吸附剂的类型以及吸附的温度和时间对于有效的脱色是重要的。 用特定重量比例的活性粘土和活性炭的混合物获得最佳结果。