发明申请
- 专利标题： METHOD FOR PRODUCING LIQUID ADJUSTMENTS OF BASIC AZO DYES
- 专利标题（中）： 生产基础AZO染料液体调节方法
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申请号： US11568996申请日： 2005-05-18
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公开(公告)号： US20070213514A1公开(公告)日： 2007-09-13
- 发明人: Michael Schmitt , Jurgen Decker , Helmut Reichelt , Gerd Rollar , Armin Diefenbacher , Hartwig Voss
- 申请人： Michael Schmitt , Jurgen Decker , Helmut Reichelt , Gerd Rollar , Armin Diefenbacher , Hartwig Voss
- 申请人地址： DE Ludwigshafen 67056
- 专利权人： BASF Aktiengesellschaft
- 当前专利权人： BASF Aktiengesellschaft
- 当前专利权人地址： DE Ludwigshafen 67056
- 优先权： DE102004025444.3 20040519
- 国际申请： PCT/EP05/05393 WO 20050518
- 主分类号： C09B29/00
- IPC分类号： C09B29/00
摘要：
A process for producing a liquid formulation of a basic azo dye from a phenylenediamine I, which may be alkyl or alkoxy substituted, by diazotizing and coupling in acidic solution comprises diazotizing the phenylenediamine with sodium nitrite in the presence of at least two organic acids comprising at least one first acid (A) having a pkA value of ≦40 and at least a second acid (B) having a pKA value ≧4.1 and performing a nanofiltration after the coupling has ended.
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