申请人:Henkel & Cie G.m.b.H.
公开号:US03965171A1
公开(公告)日:1976-06-22
A process for the production of ether polycarboxylic acids comprising reacting alkali metal salts of ether carboxylic acids with carbon dioxide in the presence of a silicon compound selected from the group of alkali metal alkoxy-silanolates and alkali metal alkoxy-polysiloxanolates and, optionally, inert diluents at temperatures of 200.degree. to 350.degree.C under pressure, acidify the resulting alkali metal salt of an ether polycarboxylic acid and recovering said ether polycarboxylic acid.
一种生产醚多羧酸的方法,包括在碱金属醚羧酸盐与二氧化碳在硅化合物的存在下反应,所述硅化合物选择自碱金属烷氧基硅醇酸盐和碱金属烷氧基多硅氧烷酸盐组中,并且在温度为200℃至350℃,压力下,可选地加入惰性稀释剂,酸化所得的醚多羧酸的碱金属盐,并回收所述醚多羧酸。