公开(公告)号：US20230092844A1

公开(公告)日：2023-03-23

申请号：US17800758

申请日：2021-02-11

Applicant: BASF SE

Inventor： Matthias VOGES ,  Lothar SEIDEMANN ,  Anika RITTER ,  Astrid SCHMIDT ,  Markus HARTMANN ,  Hartmut KOENIG ,  Frank JAEKEL ,  Rou Hua CHUA ,  Michael Klemens MUELLER

IPC: C07C227/42

Abstract: Process for making solid methylglycine diacetate (MGDA) alkali metal salt (A), said process comprising the steps of (a) providing a 40 to 60% by weight aqueous solution of said salt (A) having a temperature in the range of from 50 to 90° C., (b) crystallizing salt (A), (c) removing said crystalline salt (A) from the mother liquor by filtration, and (d) subjecting the water containing filter cake from step (c) to an extrusion step.