发明授权
- 专利标题： Method for extracting an amino acid ester from a hydrous solution of a mineral acid salt thereof
- 专利标题（中）： 从其无机酸盐的含水溶液中提取氨基酸酯的方法
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申请号： US015931申请日： 1993-01-19
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公开(公告)号： US5374765A公开(公告)日： 1994-12-20
- 发明人: Tomoko Kamashita , Hiroyuki Yamashita , Teruyuki Nagata , Masanobu Ajioka
- 申请人： Tomoko Kamashita , Hiroyuki Yamashita , Teruyuki Nagata , Masanobu Ajioka
- 申请人地址： JPX Tokyo
- 专利权人： Mitsui Toatsu Chemicals, Incorporated
- 当前专利权人： Mitsui Toatsu Chemicals, Incorporated
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX2-230643 19900903
- 主分类号： C07C227/40
- IPC分类号： C07C227/40 ; C07C709/00
摘要：
Disclosed is a method for extracting an amino acid ester from a hydrous solution which comprises adding thereto a water-insoluble organic solvent and then an amount of a base effective to liberate only a portion of the amino acid ester in free base form, and transferring the thus liberated amino acid ester in the free base form into the organic layer, and repeating the neutralization-extraction steps until all of the amino acid ester has been extracted.