发明授权
- 专利标题: Preparation of polyaspartic acid
- 专利标题(中): 聚天冬氨酸的制备
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申请号: US776706申请日: 1997-02-12
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公开(公告)号: US5830985A公开(公告)日: 1998-11-03
- 发明人: Matthias Kroner , Gunnar Schornick , Hans-Jacob Feindt , Thomas Meyer , Alfons Ludwig , Udo Metzmann
- 申请人: Matthias Kroner , Gunnar Schornick , Hans-Jacob Feindt , Thomas Meyer , Alfons Ludwig , Udo Metzmann
- 申请人地址: DEX Ludwigshafen
- 专利权人: BASF Aktiengesellschaft
- 当前专利权人: BASF Aktiengesellschaft
- 当前专利权人地址: DEX Ludwigshafen
- 优先权: DEX4428639.2 19940812
- 主分类号: C02F5/12
- IPC分类号: C02F5/12 ; C08G69/10 ; C08G73/10 ; C11D3/37
摘要:
A process for preparing polyaspartic acid by polycondensation of fine-particle aspartic acid at temperatures above 150.degree. C. in the presence of acidic catalysts, wherein first contact between the acidic catalysts and the fine-particle aspartic acid takes place in the reaction zone where the polycondensation takes place.
公开/授权文献
- US4703367A Recording disk data playback apparatus 公开/授权日:1987-10-27
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