专利检索 ap:("John H. Blumbergs" OR "Michael J. McCarthy" OR "Joseph H. Finley" OR "John M. Polkowski") AND inv:"John M. Polkowski" 第 1 页

1.

发明授权
Method of producing carboxymethyloxysuccinic acid 失效
标题翻译：产生羧甲氧基琥珀酸的方法

公开(公告)号：US3948985A

公开(公告)日：1976-04-06

申请号：US514018

申请日：1974-10-11

申请人： John H. Blumbergs , Michael J. McCarthy , Joseph H. Finley , John M. Polkowski

发明人： John H. Blumbergs , Michael J. McCarthy , Joseph H. Finley , John M. Polkowski

IPC分类号： C07C51/367 , C07F3/00 , C07C59/23

CPC分类号： C07F3/003 , C07C51/367

摘要： Carboxymethyloxysuccinic acid is prepared by acidifying the calcium salt of carboxymethyloxysuccinic acid with sulfuric acid at a temperature of 40.degree.C to 80.degree.C; filtering off the CaSO.sub.4 .2H.sub.2 O by-product and concentrating the filtrate to give the purified acid. The calcium salt of carboxymethoxysuccinic acid is formed by reacting maleic acid and glycolic acid in aqueous media containing excess calcium hydroxide.

摘要翻译： 羧甲氧基琥珀酸是通过在40〜80℃的温度下用硫酸酸化羧甲氧基琥珀酸的钙盐来制备的; 滤除CaSO 4·2H 2 O副产物并浓缩滤液得到纯化的酸。羧甲氧基琥珀酸的钙盐通过马来酸和乙醇酸在含有过量氢氧化钙的水性介质中反应而形成。