公开(公告)号：US4310331A

公开(公告)日：1982-01-12

申请号：US237566

申请日：1981-02-23

申请人： Aime J. Arsac ,  Pierre Frank

发明人： Aime J. Arsac ,  Pierre Frank

IPC分类号： C09B56/04 ,  C09B67/26 ,  C09B69/04 ,  C07C105/00 ,  C09B67/02

CPC分类号： C09B67/0073 ,  C09B56/04 ,  C09B69/04

摘要： The invention relates to a process for the preparation of the dyestuff Direct Yellow 11 directly in the form of stable concentrated solutions, in which caustic soda in aqueous solution is reacted, at a temperature from 40.degree. to 90.degree. C., with a solution containing 4-nitro-toluene-2-sulfonic acid, one or more alkanolamines, one or more alcohols containing an etheroxide function or a second alcohol function, then the caustic soda is neutralized by addition of sulfuric acid and the sodium sulfate thus formed is separated by filtration. The solutions obtained by the process according to the invention are particularly suitable for dyeing cellulosic materials and leather.

摘要翻译： 本发明涉及直接以40℃至90℃的温度从水溶液中苛性钠反应的稳定浓缩溶液形式制备染料直接黄11的方法，该方法含有 4-硝基 - 甲苯-2-磺酸，一种或多种链烷醇胺，一种或多种含有羟基氧化物官能团或第二醇官能团的醇，然后通过加入硫酸将苛性钠中和，由此形成的硫酸钠由 过滤。 通过根据本发明的方法获得的溶液特别适用于染色纤维素材料和皮革。