发明公开
EP0770054A1 A METHOD FOR PRODUCING [S,S]-ETHYLENEDIAMINE-N,N'-DISUCCINIC ACID FROM ITS CALCIUM SALT
失效
用于生产[S，S] - 乙二胺-N，N-二琥珀酸从他的钙盐
- 专利标题： A METHOD FOR PRODUCING [S,S]-ETHYLENEDIAMINE-N,N'-DISUCCINIC ACID FROM ITS CALCIUM SALT
- 专利标题（中）： 用于生产[S，S] - 乙二胺-N，N-二琥珀酸从他的钙盐
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申请号： EP95920603.0申请日： 1995-05-23
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公开(公告)号： EP0770054A1公开(公告)日： 1997-05-02
- 发明人: LIN, Ronny, W. , ATKINSON, Eldon, E., Jr. , LAYMAN, William, J., Jr.
- 申请人： ALBEMARLE CORPORATION
- 申请人地址： 451 Florida Boulevard Baton Rouge, Louisiana 70801 US
- 专利权人： ALBEMARLE CORPORATION
- 当前专利权人： ALBEMARLE CORPORATION
- 当前专利权人地址： 451 Florida Boulevard Baton Rouge, Louisiana 70801 US
- 代理机构： UEXKÜLL & STOLBERG
- 优先权： US19940272469 19940711
- 国际公布： WO1996001801 19960125
- 主分类号： C07B53
- IPC分类号： C07B53 ; C07C227 ; C07C229
摘要：
This invention relates to a method for converting calcium salts of [S,S]-ethylenediamine-N,N'-disuccinic acid to an easily filterable precipitate of [S,S]-ethylenediamine-N,N'-disuccinic acid comprising: co-feeding, to a volume of water, calcium [S,S]-ethylenediamine-N,N'-disuccinic acid salt and aqueous mineral acid, the mineral acid having a dissociation constant within the range of from about 1.0 x 10-5 to about 1.0 x 1010, wherein the feed rates of the calcium salt and the aqueous mineral acid are controlled so that the volume of water has a pH within the range of from about 1.4 to about 7 at least substantially throughout the co-feed period.
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