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Rhodium-catalyzed carbonylation using non-acetate lithium, sodium and potassium inorganic salts as promoters to produce carboxylic acids
Rhodium-catalyzed carbonylation using non-acetate lithium, sodium and potassium inorganic salts as promoters to produce carboxylic acids
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机译：铑催化的羰基化反应，使用非乙酸锂，钠和钾无机盐作为促进剂，可生产羧酸
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摘要
The present invention relates to an improved process for producing an organic carboxylic acid having (n+1) carbon atoms by reacting an alcohol having n carbon atoms with carbon monoxide in the presence of a rhodium catalyst system. More particularly, the present invention relates to carbonylation of alcohol such as methanol catalyzed by a rhodium system to produce acetic acid. The characteristic of the present invention is the addition of a catalyst stabilizer in the reaction medium to avoid or to alleviate the precipitation of the catalyst in the liquid phase. The catalyst as used herein is a an inorganic salt of alkaline metal having the following formula (A):; ;X=Li+, Na+, K+;;M=CO3−2, HCO3−, PO4−3, HPO4−2, H2PO4−, SO4−2, HSO4−, C2O4−2, HC2O4−, B(C6Y5)4−1;;Y=H, F or CF3.
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机译：本发明涉及一种改进的方法，该方法通过在铑催化剂体系的存在下使具有n个碳原子的醇与一氧化碳反应来生产具有（n + 1）个碳原子的有机羧酸。更具体地，本发明涉及由铑系统催化的醇例如甲醇的羰基化以产生乙酸。本发明的特征是在反应介质中添加催化剂稳定剂以避免或减轻催化剂在液相中的沉淀。本文所用的催化剂是具有下式（A）的碱金属的无机盐： <数学> <！[CDATA [ X n M < HIL> m ＆emsp;＆emsp;（A） ]]> ; X＆equals; Li ＆plus; ，Na ＆plus; ，K ＆plus; ;; M＆equals; CO 3 ＆minus; 2 ，HCO 3 ＆minus; ，PO 4 ＆minus; 3 ，HPO < Sub> 4 ＆minus; 2 ，H 2 PO 4 ＆minus; ，SO 4 ＆minus; 2 ，HSO 4 ＆minus; ，C 2 O 4 < / Sub> ＆minus; 2 ，HC 2 O 4 ＆minus; ，B（C 6 < / Sub> Y 5 ） 4 ＆minus; 1 ;; Y＆equals; H，F或CF 3 。
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