申请人:Celanese Chemicals Europe GmbH
公开号:US06423856B1
公开(公告)日:2002-07-23
The present invention relates to a process for preparing ester plasticizers from ethylene glycol or the dimers, trimers or tetramers of this compound and linear or branched aliphatic monocarboxylic acids having from 3 to 20 carbon atoms. The reaction is carried out in the presence of organic substances having a boiling point of <112° C., in particular cyclohexane, as azeotrope formers (entrainers) for removing the water of reaction.
本发明涉及一种从乙二醇或该化合物的二聚体、三聚体或四聚体以及具有从3到20个碳原子的线性或支链脂肪族一元羧酸制备酯类增塑剂的过程。在有机物质存在下进行反应,该有机物质具有沸点<112°C,特别是环己烷,作为共沸剂(协助剂)以去除反应水。