发明授权
US4085097A Process for the manufacture of chromium complexes from metallizable azo
or azo methine dyes
失效
从金属化偶氮或偶氮次甲基染料制造铬络合物的方法
- 专利标题: Process for the manufacture of chromium complexes from metallizable azo or azo methine dyes
- 专利标题(中): 从金属化偶氮或偶氮次甲基染料制造铬络合物的方法
-
申请号: US647268申请日: 1976-01-07
-
公开(公告)号: US4085097A公开(公告)日: 1978-04-18
- 发明人: Fabio Beffa , Arthur Buhler , Peter Donath , Hans Ulrich Schutz , Gerhard Back
- 申请人: Fabio Beffa , Arthur Buhler , Peter Donath , Hans Ulrich Schutz , Gerhard Back
- 申请人地址: CH Basel
- 专利权人: Ciba-Geigy AG
- 当前专利权人: Ciba-Geigy AG
- 当前专利权人地址: CH Basel
- 优先权: CH18724/72 19721222; CH16848/73 19731130
- 主分类号: C09B45/01
- IPC分类号: C09B45/01 ; C09B45/16 ; C09B45/06 ; C09B45/34 ; C09B45/48 ; C09B55/00
摘要:
A process is described for the manufacture of chromium complexes of metallizable dyes in the form of solid dyestuff powders of low salt to salt-free content, or of concentrated solutions of low salt or salt-free content in which a metallizable dye, or a mixture of metallizable dyes, in an organic solvent which is immiscible or sparingly miscible with water, or reacted with a chromium compound, in the course of which any water which is liberated is removed by azeotropic distillation, and the resulting chromium complex, provided it is a 1:1 complex, is then optionally reacted in the presence of a base with a further mol of a metallizable dye, or of a colorless, complexforming compound, then isolated from undissolved constituents, and the resulting dye solution of low salt or salt-free content is optionally concentrated or evaporated to dryness, whereby it is possible the manufacture of 1:1 or 1:2 chromium complexes without the handicap of effluent pollution, and to isolate the dyes without using salt. The dyes obtained are especially suitable for the manufacture of concentrated solutions without the necessity of having to increase the solubility by means of extenders.
公开/授权文献
- US5052550A Spectacle case 公开/授权日:1991-10-01
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