发明公开
- 专利标题： METHOD FOR REFINING ACETIC ANHYDRIDE
- 专利标题（中）： PROCEDURE FOR CLEANING乙酸酐。
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申请号： EP93922409.0申请日： 1993-09-27
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公开(公告)号： EP0664785A1公开(公告)日： 1995-08-02
- 发明人: LOWERY, Houston, Ford, III , COOK, Steven, Leroy , PINTO, Vicky, Kraher
- 申请人： EASTMAN CHEMICAL COMPANY
- 申请人地址： 100 North Eastman Road Kingsport, TN 37660 US
- 专利权人： EASTMAN CHEMICAL COMPANY
- 当前专利权人： EASTMAN CHEMICAL COMPANY
- 当前专利权人地址： 100 North Eastman Road Kingsport, TN 37660 US
- 代理机构： Wibbelmann, Jobst, Dr., et al
- 优先权： US19920959956 19921013
- 国际公布： WO1994008938 19940428
- 主分类号： C07C51
- IPC分类号： C07C51 ; C07C53
摘要：
Disclosed is a continuous method for refining acetic anhydride produced by the reaction of ketene and acetic acid by means of a vacuum distillation system to provide a refined material comprised of at least 99.5 weight percent acetic anhydride, not more than 0.5 weight percent acetic acid and not more than 90 parts per million (ppm) diketene.
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