发明授权
- 专利标题: Process for the preparation of oxy-diphthalic anhydrides
- 专利标题(中): 氧基二邻苯二甲酸酐的制备方法
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申请号: US914955申请日: 1986-10-03
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公开(公告)号: US4697023A公开(公告)日: 1987-09-29
- 发明人: Willis T. Schwartz , Joseph A. Pawlak
- 申请人: Willis T. Schwartz , Joseph A. Pawlak
- 申请人地址: NY Niagara Falls
- 专利权人: Occidental Chemical Corporation
- 当前专利权人: Occidental Chemical Corporation
- 当前专利权人地址: NY Niagara Falls
- 主分类号: C07D307/89
- IPC分类号: C07D307/89 ; C07C51/347 ; C07C51/567 ; C07C65/24
摘要:
Oxy-diphthalic anhydrides are prepared by reacting a halophthalic anhydride with water and an alkali metal compound such as KF, CsF or K.sub.2 CO.sub.3 in the presence of a polar, aprotic solvent.
公开/授权文献
- US5840189A Beverage filter cartridge 公开/授权日:1998-11-24
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