发明授权
US4141892A Process for preparing p-[[p-(phenylazo)phenyl]azo]phenol
失效
制备p- {8 {对 - (苯基偶氮)苯基{9偶氮{9苯酚}的方法
- 专利标题: Process for preparing p-[[p-(phenylazo)phenyl]azo]phenol
- 专利标题(中): 制备p- {8 {对 - (苯基偶氮)苯基{9偶氮{9苯酚}的方法
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申请号: US821950申请日: 1977-08-04
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公开(公告)号: US4141892A公开(公告)日: 1979-02-27
- 发明人: Edgar E. Renfrew , Roy E. Smith
- 申请人: Edgar E. Renfrew , Roy E. Smith
- 申请人地址: NC Charlotte
- 专利权人: American Color & Chemical Corporation
- 当前专利权人: American Color & Chemical Corporation
- 当前专利权人地址: NC Charlotte
- 主分类号: C09B31/062
- IPC分类号: C09B31/062 ; C09B41/00 ; C09B31/06
摘要:
A process for preparing the compound, or dye, ##STR1## by forming aminoazobenzene employing a slight excess of sodium nitrite in the diazotization of aniline and, without isolation, diazotizing the monoazo base and coupling the diazonium salt into phenol.
公开/授权文献
- USD339035S Spatula holder 公开/授权日:1993-09-07
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