Invention Grant
US09227915B2 Process for the preparation of a crystalline L-MGDA trialkali metal salt
有权
制备结晶L-MGDA三碱金属盐的方法
- Patent Title: Process for the preparation of a crystalline L-MGDA trialkali metal salt
- Patent Title (中): 制备结晶L-MGDA三碱金属盐的方法
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Application No.: US13463446Application Date: 2012-05-03
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Publication No.: US09227915B2Publication Date: 2016-01-05
- Inventor: Alfred Oftring , Maxim Weber , Gerold Braun , Arnulf Lauterbach
- Applicant: Alfred Oftring , Maxim Weber , Gerold Braun , Arnulf Lauterbach
- Applicant Address: DE Ludwigshafen
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE Ludwigshafen
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Main IPC: C07C227/42
- IPC: C07C227/42
Abstract:
A process is proposed for the preparation of a crystalline L-MGDA trialkali metal salt by crystallization from an aqueous solution thereof which has been obtained by Strecker synthesis, starting from L-α-alanine, by reaction with formaldehyde and hydrocyanic acid to give L-α-alanine-N,N-diacetonitrile and subsequent alkaline saponification of the L-α-alanine-N,N-diacetonitrile to give the L-MGDA trialkali metal salt, wherein a temperature of 150° C. is not exceeded during the alkaline saponification.
Public/Granted literature
- US20120283473A1 PROCESS FOR THE PREPARATION OF A CRYSTALLINE L-MGDA TRIALKALI METAL SALT Public/Granted day:2012-11-08
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