公开(公告)号：DE59500108D1

公开(公告)日：1997-03-27

申请号：DE59500108

申请日：1995-05-11

Applicant: BASF AG

Inventor： BERMES RUDOLF DR ,  KEILHAUER HEINZ

IPC: C09B29/08 ,  C07D209/62 ,  C09B29/085 ,  C09B35/029 ,  C09B43/00

Abstract: Aminoazo dyes are prepared from the corresponding N-sulfomethylated aminoazo dyes by aqueous acid hydrolysis in the presence of amidosulfuric acid, urea or mixtures thereof.

公开(公告)号：DE2825296A1

公开(公告)日：1979-12-13

申请号：DE2825296

申请日：1978-06-09

Applicant: BASF AG

Inventor： BERMES RUDOLF DIPL CHEM DR ,  KEILHAUER HEINZ

IPC: C09B44/00 ,  C09B43/00 ,  C07C3/50

Abstract: Organic dye bases are quaternised in absence of solvent and in presence of solid acid acceptor, with subsequent destruction of excess alkylating agent by addn. of ammonia or (NH4)2CO3, and removal of excess basic material by addn. of solid acid and mixing. Pref. 0.5-3(1-1.5) equivs. acid acceptor (pref. MgO) is used per equiv. dye base, which may be of azo, methine or azamethine type. Up to twice, pref. 1.05-1.25 times, the stoichiometric amt. of alkylating agent, esp. dimethyl or diethyl sulphate, is used. The process is applicable and esp. weak, dye bases and the reaction proceeds quickly and quantitatively, the prods. being completely water-soluble.