发明授权
- 专利标题： Process for purifying methyl methacrylate
- 专利标题（中）： 纯化甲基丙烯酸甲酯的方法
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申请号： US364508申请日： 1989-06-09
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公开(公告)号： US5034558A公开(公告)日： 1991-07-23
- 发明人: Teruhiko Yoshioka , Kouhei Okamura , Masao Kobayashi
- 申请人： Teruhiko Yoshioka , Kouhei Okamura , Masao Kobayashi
- 申请人地址： JPX Tokyo
- 专利权人： Mitsubishi Rayon Co., Ltd.
- 当前专利权人： Mitsubishi Rayon Co., Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX63-127952 19880525
- 主分类号： B01J27/02
- IPC分类号： B01J27/02 ; B01J31/10 ; C07C67/56 ; C07C67/58 ; C07C69/54
摘要：
A process for purifying methyl methacrylate which comprises treating methyl methacrylate having a purity of 99.5% or more containing a trace of impurities with a sulfonic acid group-containing compounds. According to the present invention, there can be obtained highly purified methyl methacrylate which exhibits an absorbance of 0.02 or less in a range of wavelength of 400-500 nm according to the sulfuric acid color method and is free of even a trace of furan-type compounds.
公开/授权文献
- US06161470A Permanent filter for the preparation of tea in pots or cups 公开/授权日：2000-12-19
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