- 专利标题： Process for making solid methylglycine diacetate (MGDA) alkali metal salt, and solid particles
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申请号： US17059540申请日： 2019-05-21
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公开(公告)号： US12006277B2公开(公告)日： 2024-06-11
- 发明人: Frank Jaekel , Michael Klemens Mueller
- 申请人： BASF SE
- 申请人地址： DE Ludwigshafen am Rhein
- 专利权人： BASF SE
- 当前专利权人： BASF SE
- 当前专利权人地址： DE Ludwigshafen am Rhein
- 代理机构： Armstrong Teasdale LLP
- 优先权： EP 175104 2018.05.30
- 国际申请： PCT/EP2019/063042 2019.05.21
- 国际公布： WO2019/228849A 2019.12.05
- 进入国家日期： 2020-11-30
- 主分类号： C07C227/42
- IPC分类号： C07C227/42 ; C07C229/12
摘要：
A process for making solid methylglycine diacetate (MGDA) alkali metal salt (a) includes:
(A) providing a 40 to 60% by weight aqueous solution of the MGDA salt having a temperature in the range of from 50 to 90° C.,
(B) adding solid salt (a),
(C) heating the resultant slurry until the salt (a) added in step (B) has dissolved at least partially,
(D) allowing salt (a) to crystallize, and
(E) removing crystalline salt (a) from the mother liquor.
(A) providing a 40 to 60% by weight aqueous solution of the MGDA salt having a temperature in the range of from 50 to 90° C.,
(B) adding solid salt (a),
(C) heating the resultant slurry until the salt (a) added in step (B) has dissolved at least partially,
(D) allowing salt (a) to crystallize, and
(E) removing crystalline salt (a) from the mother liquor.
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