[EN] RING FLUORINATED REACTIVE DYES<br/>[FR] COLORANTS RÉACTIFS FLUORÉS À NOYAU
申请人:DYSTAR COLOURS DEUTSCHLAND GMB
公开号:WO2010057830A1
公开(公告)日:2010-05-27
The present invention claims dyestuffs of the formula (I) wherein a, is 1 or 2; X1, X2, RG, R1, R2, R3, R4, a, b, c and M are defined as given in claim 1, a method for their preparation and their use.
[EN] FLUORINE CONTAINING REACTIVE DYES<br/>[FR] COLORANTS RÉACTIFS CONTENANT DU FLUOR
申请人:DYSTAR COLOURS DEUTSCHLAND GMB
公开号:WO2010094415A1
公开(公告)日:2010-08-26
The present invention claims dyestuffs of the formula (I) wherein X1, RG, R1, R2, Z1, a, b and M are defined as given in claim 1, a method for their preparation and their use.
A compound represented by a free acid of the formula:
wherein D is
(R, and R2 independently represent hydrogen atom, methyl group or methoxy group) or
(n is 0 or 1, the mark * signifies the position of linkage to -N=N- and the mark # signifies the position of linkage to Q mentioned below); Q is-SO2CH=CH2 or -SO2CH2CH2R (R is a group capable of being split off by the action of alkali); one of X, and X2 is hydrogen atom and the other is sulfonic acid group; and m is 0 or 1, which is useful for dyeing cellulose fibers a blue-back color with good dyeability and excellent fastnesses, particularly chlorine fastness.
METHOD FOR CONTINUOUSLY PREPARING WATER-SOLUBLE AZO DYE BY COUPLING A NEBULIZER WITH A PIPELINE
申请人:DALIAN UNIVERSITY OF TECHNOLOGY
公开号:US20150073132A1
公开(公告)日:2015-03-12
Disclosed is a method for continuously preparing a water-soluble azo dye by coupling a nebulizer with a pipeline. According to the method, the nebulizer is coupled with a pipeline with an interception tower plate, atomized and mixed reaction liquid flow flows through the pipeline with the interception tower plate, and mixing and reacting are further enhanced through turbulent mixing on the tower plate, so that instant separation of reaction heat generated in an atomizing contact reaction from a reactant is achieved, and normal-temperature rapid continuous production of the water-soluble azo dye is achieved. Fog drops which are atomized by using the nebulizer have small particle diameter and large specific surface area, so that a diazo salt and a coupling component are sprayed separately, move face to face and can be fully contacted, and mixing and reacting speeds are increased. The preparation method is simple, and compared with preparation of a dye of the same kind with a batch reactor, in the reparation process of the water-soluble azo dye, a cold source is not required to be added additionally for cooling, thereby reducing energy consumption and improving production quality and efficiency.