申请人:UNILEVER N.V.
公开号:EP0475512A1
公开(公告)日:1992-03-18
A process is reported for preparation of quaternary ammonium-type carbonate esters which are useful as bleach precursors in detergent compositions. The process involves transesterification of low molecular weight carbonates, e.g. diphenyl carbonate, with quaternary ammonium functionalized alcohols, e.g. choline chloride. Preferably the reaction is run in a high dielectric constant aprotic solvent such as acetonitrile. The reaction may also be conducted neat utilizing liquefied carbonate reactant as a solvent medium.
报告了一种制备季铵型碳酸酯的工艺,这种碳酸酯可用作洗涤剂组合物中的漂白剂前体。该工艺包括低分子量碳酸酯(如碳酸二苯酯)与季铵官能化醇(如氯化胆碱)的酯交换反应。反应最好在高介电常数的非沸腾溶剂(如乙腈)中进行。也可以不使用液化碳酸盐反应物作为溶剂介质进行反应。