申请人:DOW GLOBAL TECHNOLOGIES LLC
公开号:WO2016061760A1
公开(公告)日:2016-04-28
Disclosed is a process for preparing a hydroxyalkyl sorbate comprising the steps of of: a) contacting together in a reaction vessel a solvent, sorbic acid, a transition metal halide catalyst, an anti-oxidant, and an alkylene oxide under conditions sufficient to form the hydroxyalkyl sorbate; b) removing the solvent in vacuo, wherein the anti-oxidant is characterized by the following formula or a carboxylic acid salt thereof: wherein Y, x, and R1 are defined herein. The process provides a convenient way of preparing hydroxyalkyl sorbates in high yield and purity without complicated workup steps.
本发明揭示了一种制备羟基烷基山梨酸酯的方法,包括以下步骤:a)在反应容器中将溶剂、山梨酸、过渡金属卤化物催化剂、抗氧化剂和烷氧基在足够的条件下接触以形成羟基烷基山梨酸酯;b)在真空下去除溶剂,其中抗氧化剂具有以下公式或其羧酸盐:其中Y、x和R1在此定义。该方法提供了一种方便的方式,以高收率和高纯度制备羟基烷基山梨酸酯,而无需复杂的工艺步骤。