发明授权
US4754020A Process for preparing aromatic diazonium salts by diazotation of amines
失效
通过胺的重氮化制备芳族重氮盐的方法
- 专利标题： Process for preparing aromatic diazonium salts by diazotation of amines
- 专利标题（中）： 通过胺的重氮化制备芳族重氮盐的方法
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申请号： US837490申请日： 1986-03-07
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公开(公告)号： US4754020A公开(公告)日： 1988-06-28
- 发明人: Joachim Wolff , Karlheinz Wolf , Reinhold M. Klipper , Peter M. Lange
- 申请人： Joachim Wolff , Karlheinz Wolf , Reinhold M. Klipper , Peter M. Lange
- 申请人地址： DEX Leverkusen
- 专利权人： Bayer Aktiengesellschaft
- 当前专利权人： Bayer Aktiengesellschaft
- 当前专利权人地址： DEX Leverkusen
- 优先权： DEX3511752 19850330
- 主分类号： C07C245/20
- IPC分类号： C07C245/20 ; C09B29/00 ; C09B41/00 ; C09B67/26 ; C09B29/033 ; C09B62/24 ; C09B67/44
摘要：
A new method of diazotization consists in using as the diazotizing agent in an aqueous, aqueous organic or organic medium the system comprising salt of nitrous acid+acid insoluble in the reaction medium, in particular organic or inorganic cation exchangers having acid groups. The diazonium salt solutions thus prepared are immediately reacted with coupling components to give azo dyestuffs, the insoluble acid and/or its salt being separated off before or after the coupling.
公开/授权文献
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