A method of making acid anhydrides from epoxide and carbon monoxide feedstocks is presented. In various aspects, the method includes steps of reacting the contents of a feed stream comprising an epoxide, a solvent, a carbonylation catalyst and carbon monoxide to produce a first carbonylation product stream comprising a beta-lactone, then reacting the contents of the first carbonylation product stream with additional carbon monoxide to produce a second carbonylation product stream comprising an acid anhydride, and separating at least a portion of the acid anhydride from the second carbonylation product stream to produce: i) an acid anhydride product stream comprising the separated portion of acid anhydride; and ii) a recycling stream comprising the carbonylation catalyst, and finally adding the recycling stream to the feed stream.
提供一种从
环氧化物和
一氧化碳原料制备酸酐的方法。在各个方面中,该方法包括以下步骤:将包括
环氧化物、溶剂、羰化催化剂和
一氧化碳的进料流的内容反应,以产生第一羰化产物流,其中包括β-内酰胺,然后将第一羰化产物流的内容与额外的
一氧化碳反应,以产生第二羰化产物流,其中包括酸酐,并从第二羰化产物流中分离至少一部分酸酐,以产生:i)包括分离部分酸酐的酸酐产品流; 和ii)包括羰化催化剂的回收流,最后将回收流添加到进料流中。