公开(公告)号：US20200095189A1

公开(公告)日：2020-03-26

申请号：US16484016

申请日：2018-02-20

Applicant: BASF SE

Inventor： Somnath Shivaji KADAM ,  Frank JAEKAL ,  Feelly RUETHER ,  Lothar KARRER

IPC: C07C227/42 ,  C07C229/16 ,  C11D3/33 ,  C11D3/39 ,  B01D9/00

Abstract: Process for making solid methylglycine diacetate (MGDA) alkali metal salt (a), said process comprising the steps of (A) providing a 35 to 60% by weight aqueous solution of said MGDA salt having a temperature in the range of from 50 to 90° C., (B) adding 0.01 to 2% by weight of a particulate solid with a pore volume in the range of from 0.25 to 0.75 cm3/g, determined by nitrogen adsorption in accordance with 66134:1998-02 (b), the percentage referring to the content of (a), (C) crystallizing (a), (D) removing said crystalline (a) from the mother liquor.