Disclosed herein is a novel process for preparing 3-hydroxyesters, comprising: (a) reacting an epoxide derivative with carbon monoxide and alcohol in a solvent at a temperature of 30∼150°C under a pressure of 50∼3000psig by using a catalyst system consisting of a catalytic amount of a cobalt compound and optionally an effective amount of a promoter to produce a 3-hydroxyester or a derivative thereof; (b) separating the resulting product and the solvent from the cobalt compound and the promoter in a stripping column at a temperature of -30∼200°C in an atmosphere of a stabilizing gas; and (c) recycling a part or all of the separated cobalt compound and promoter to the step (a) and repeating the steps (a) through (c).
本文公开了一种制备 3-羟基酯的新工艺,包括(a) 使用由催化量的
钴化合物和可选有效量的
促进剂组成的催化剂体系,使环氧衍
生物与溶剂中的
一氧化碳和醇在温度 30∼150°C 压力 50∼3000psig 下反应,生成 3-羟基酯或其衍
生物;(b) 在-30∼200°C 的温度下,在稳定气体的气氛中,在汽提柱中将生成物和溶剂与
钴化合物和
促进剂分离;以及 (c) 将部分或全部分离的
钴化合物和
促进剂回收至步骤(a),并重复步骤(a)至(c)。