A process for the co-production of acetic anhydride and acetic acid which process comprises introducing a carbonylatable feedstock comprising methyl acetate and/or dimethyl ether and optionally also comprising methanol and/or water, to a carbonylation reactor in which there is maintained a liquid reaction composition comprising acetic anhydride, acetic acid, rhodium carbonylation catalyst, alkyl iodide co-catalyst and an iodide salt promoter consisting essentially of an alkali metal iodide and/or alkaline earth metal iodide, contacting said carbonylatable feedstock with carbon monoxide in said liquid reaction composition to produce acetic anhydride and acetic acid, and introducing to the carbonylation reactor methyl formate and/or formic acid in the range from 0.1 to 20% by weight of the total feed of liquid components to the reactor.
一种制备乙酰酸酐和
乙酸的共生产工艺,该工艺包括将可羰化原料引入羰化反应器中,该可羰化原料包括
乙酸甲酯和/或二
甲醚,并且还可以包括
甲醇和/或
水,反应器中保持液态反应组成物,该液态反应组成物包括
乙酸酐、
乙酸、
铑羰基催化剂、烷基
碘辅催化剂和
碘化物盐
促进剂,所述
碘化物盐
促进剂基本上由碱
金属
碘化物和/或碱土
金属
碘化物组成,将该可羰化原料与
一氧化碳在该液态反应组成物中接触以产生
乙酸酐和
乙酸,并将
甲酸甲酯和/或
甲酸引入羰化反应器,其占总液态组分进料的重量范围为0.1至20%。