CAS: 2832-40-8; N-(4-((2-Hydroxy-5-Methylphenyl)Diazenyl)Phenyl)Acetamide

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CAS号106-44-5 对甲酚 | CAS号122-80-5 对氨基乙酰苯胺

对甲酚,4'-氨基乙酰苯胺置于盐酸,Sodium Nitrite体系中,化学反应生成分散黄 3
参考文献:Masoud,Mamdouh S.; Osman,M. M.; Salem,T. M.,Indian Journal Of Chemistry,Section A: Inorganic,Physical,Theoretical And Analytical,1981,Vol. 20,# 6,P. 584-587
标题:Masoud,Mamdouh S.; Osman,M. M.; Salem,T. M.,Indian Journal Of Chemistry,Section A: Inorganic,Physical,Theoretical And Analytical,1981,Vol. 20,# 6,P. 584-587

专利信息

专利号:US-5852179-A
优先权日:1998-05-27
标 题 :Preparation of disperse azo dyestuffs in the presence of alkoxylated acetylenic diols
发明人：DADO GREGORY PAUL
权利人:AIR PROD & CHEM
摘要:The use of alkoxylated acetylenic diol surfactants in the aqueous synthesis of disperse azo dyes provides a simple process for improving filtration properties of dyestuff. The surfactants may be added prior to the coupling step of the synthesis or prior to heat treatment of the dye slurry. Advantages that are realized by incorporation of the surfactants into the synthesis include decreased filtration time, increased solid content in filter cake, improved washing properties of filter cake, and increased dye yield. In addition, for azo dyes that are synthesized as non-heat-stable crystal modifications, the presence of alkoxylated acetylenic diol surfactants in the dye slurry is effective in promoting the conversion of the dye to the desired thermally stable crystal modification.