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发明公开
CN104254512A 在高级羧酸和均相催化剂存在下的甲醛的氢羧基化 有权

在高级羧酸和均相催化剂存在下的甲醛的氢羧基化
摘要：
公开了一种用于通过在均相酸催化剂和羧酸存在下的甲醛的羰基化生产和纯化乙醇酸或乙醇酸衍生物的方法。本发明公开了氢羧基化以及相应的均相酸催化剂和乙醇酸的分离。所述均相酸催化剂容易从氢羧基化反应流出物中分离和再循环，而且所述羧酸容易从乙醇酸中除去并且所述羧酸被再循环。
摘要（英）：

Disclosed is a process for the production and purification of glycolic acid or glycolic acid derivatives by the carbonylation of formaldehyde in the presence of a homogeneous acid catalyst and a carboxylic acid. This invention discloses hydrocarboxylations and corresponding homogeneous acid catalyst and glycolic acid separations. The homogeneous acid catalyst is readily separated from the hydrocarboxylation reaction effluent and recycled and the carboxylic acid is readily removed from the glycolic acid and the carboxylic acid is recycled.

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