发明授权
- 专利标题： Process for purifying oxalic acid diamide
- 专利标题（中）： 草酸二酰胺的纯化方法
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申请号： US129843申请日： 1987-12-08
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公开(公告)号： US5047587A公开(公告)日： 1991-09-10
- 发明人: Loreno Lorenzoni , Giuseppe Messina , Vittorio Bruzzi
- 申请人： Loreno Lorenzoni , Giuseppe Messina , Vittorio Bruzzi
- 申请人地址： ITX Palermo
- 专利权人： Enichem Anic S.p.A.
- 当前专利权人： Enichem Anic S.p.A.
- 当前专利权人地址： ITX Palermo
- 优先权： ITX22638A/86 19861211
- 主分类号： B01J38/00
- IPC分类号： B01J38/00 ; B01J23/94 ; C07C67/00 ; C07C231/00 ; C07C231/24 ; C07C233/56 ; C07C235/00
摘要：
A process is disclosed for the purification of the diamide of oxalic acid obtained by means a process wherein copper catalysts are used, by means of the washing with aqueous solutions of an ammonium salt of an organic or inorganic acid, operating at a pH value comprised within the range of from 2 to 8, and at a temperature comprised within the range of from 40.degree. to 150.degree. C.
公开/授权文献
- US5375271A Bath mat having temperature related indicia 公开/授权日：1994-12-27
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