Invention Grant
- Patent Title: Process for making solid methylglycine diacetate (MGDA) alkali metal salt, and solid particles
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Application No.: US16484016Application Date: 2018-02-20
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Publication No.: US11208375B2Publication Date: 2021-12-28
- Inventor: Somnath Shivaji Kadam , Frank Jaekel , Feelly Ruether , Lothar Karrer
- Applicant: BASF SE
- Applicant Address: DE Ludwigshafen am Rhein
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE Ludwigshafen am Rhein
- Agency: Arent Fox LLP
- Priority: EP17157850 20170224
- International Application: PCT/EP2018/054185 WO 20180220
- International Announcement: WO2018/153876 WO 20180830
- Main IPC: C11D7/32
- IPC: C11D7/32 ; C11D7/02 ; C07C227/42 ; B01D9/00 ; C07C229/16 ; C11D3/33 ; C11D3/39

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.
Public/Granted literature
- US20200095189A1 PROCESS FOR MAKING SOLID METHYLGLYCINE DIACETATE (MGDA) ALKALI METAL SALT, AND SOLID PARTICLES Public/Granted day:2020-03-26
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