发明授权
- 专利标题： Method of purifying glyoxylic esters and distillation equipment for purifying glyoxylic esters
- 专利标题（中）： 纯化乙醛酸酯的方法和纯化乙醛酸酯的蒸馏设备
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申请号： US51302申请日： 1998-04-10
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公开(公告)号： US6037489A公开(公告)日： 2000-03-14
- 发明人: Hideyuki Baba , Satoru Miura , Masanori Nonoguchi , Noboru Saito
- 申请人： Hideyuki Baba , Satoru Miura , Masanori Nonoguchi , Noboru Saito
- 申请人地址： JPX
- 专利权人： Nippon Shokubai Co., Ltd.
- 当前专利权人： Nippon Shokubai Co., Ltd.
- 当前专利权人地址： JPX
- 优先权： JPX8-235529 19960905
- 主分类号： C07C67/54
- IPC分类号： C07C67/54 ; C07C69/67 ; C07C69/66 ; C07C51/46
摘要：
A method for purifying glyoxylates includes (1) a coarse distillation process in which a crude glyoxylate in which water coexists is, in a film form, continuously subjected to coarse distillation, and (2) an azeotropic dehydration process in which the crude glyoxylate purified through the coarse distillation process is subjected to azeotropic dehydration in the presence of an azeotropic agent such as propyl acetate. By this method, high-purity glyoxylates can be efficiently and easily obtained at lower costs.
公开/授权文献
- USD385094S Shoe upper 公开/授权日：1997-10-21