Direct synthesis of tin (II) carboxylates and tin(IV) carboxylates from elemental tin or tin oxides
申请人:Crompton Corporation
公开号:US06303808B1
公开(公告)日:2001-10-16
A process for making a product containing tin (II) carboxylates of the formula (RCOO)2−n(OOCR′)n, where each R, which may be the same or different, is hydrogen or a C1-C40 hydrocarbyl group, each R′, which may be the same or different, is a C1-C40 hydrocarbyl group, and n is 0, 1, or 2 the process comprising:
(a) forming a reaction mixture by combining elemental tin, a promoter, and one or more carboxylate-containing compounds of the formula R(CO)X, where R is hydrogen or a C1-C40 hydrocarbyl group and X is a hydroxyl group, a halogen atom, or O(CO)R′, where R′ is a C1-C40 hydrocarbyl group;
(b) heating the reaction mixture to form heated reaction mixture;
(c) oxidizing the heated reaction mixture using an oxygen-containing gas to form an oxidized reaction mixture containing tin (II) carboxylates as well as tin (IV) carboxylates; and
(d) reducing the oxidized reaction mixture with elemental tin to convert at least a portion of the tin (IV) carboxylates to tin (II) carboxylates to form the product containing tin (II) carboxylates.
一种制备含有配方为(RCOO)2−n(OOCR′)n的二价锡羧酸盐的产品的方法,其中每个R(可以相同或不同)是氢或C1-C40烃基,每个R’(可以相同或不同)是C1-C40烃基,n为0、1或2,该方法包括:(a)通过将元素锡、促进剂和一个或多个含有配方为R(CO)X的羧酸盐化合物组合而成反应混合物,其中R是氢或C1-C40烃基,X是羟基、卤素原子或O(CO)R′,其中R′是C1-C40烃基;(b)加热反应混合物以形成加热后的反应混合物;(c)使用含氧气体氧化加热后的反应混合物以形成含有二价锡羧酸盐和四价锡羧酸盐的氧化反应混合物;以及(d)使用元素锡还原氧化反应混合物,将至少一部分四价锡羧酸盐转化为二价锡羧酸盐,以形成含有二价锡羧酸盐的产品。