申请人:Monsanto Company
公开号:US05028723A1
公开(公告)日:1991-07-02
There is disclosed an improved process for preparing 1-hydroxy-3-oxa-1,2,4,5-pentane tetracarboxylic acid and 3,6-dioxa-1,2,4,5,7,8-octane hexacarboxylic acid wherein the reaction mixture has a solids concentration of above about 60%, by weight whereby the amount of by-product fumarate is reduced.
本发明公开了一种改进的制备1-羟基-3-氧杂-1,2,4,5-戊烷四羧酸和3,6-二氧杂-1,2,4,5,7,8-辛烷六羧酸的方法,其中反应混合物的固体浓度高于约60%,重量,从而减少了副产物富马酸的量。