CAS: 603-40-7; 4,4'-(Phenylmethylene)Dianiline

上下游产品

CAS号100-52-7 苯甲醛 | CAS号98-87-3 二氯苄 | CAS号142-04-1 苯胺盐酸盐 | CAS号542-16-5 苯胺硫酸盐(2:1) | CAS号82-87-1 4-[(4-Amino-3-m... | CAS号1144-74-7 4-硝基二苯甲酮 | CAS号5089-33-8 4-溴-N,N-双(三甲基甲硅烷基)苯胺 | CAS号538-51-2 N-苄叉苯胺 | CAS号21112-02-7 1-nitro-4-[(4-n... | CAS号82-87-1 4-[(4-Amino-3-m... | CAS号4081-02-1 4,4-(苯基亚甲基)二苯酚 | CAS号519-73-3 三苯基甲烷 | CAS号7664-41-7 氨

4,4'-Dihydroxy-Triphenylmethylcarbinol置于乙醇,氨体系中,化学反应生成 4,4'-二氨基三苯基甲烷
参考文献:Meyer,R.; Gerloff,Chemische Berichte,1924,Vol. 57,P. 597
标题:Meyer,R.; Gerloff,Chemische Berichte,1924,Vol. 57,P. 597

专利信息

专利号:US-4035350-A
优先权日:1975-01-30
标 题:Process for the preparation of water-soluble azo dyestuffs by reacting an aromatic amine and a coupling component with alkali metal nitrite or alkyl nitrite in the absence of acid
发明人：LANDLER JOSEF; WORFEL ERHARD
权利人:HOECHST AG
摘要:A new and very advantageous Process had been found for the preparation of azo dyestuffs by diazotation and coupling in which the synthesis is carried out without the hitherto usual addition of an acid, with the proviso that at least one of the diazo and coupling components contains at least one acid group. Besides the saving of reaction material and subsequently of alkali for neutralization of the reaction medium and isolation of the dyestuff, highly concentrated solutions of the dyestuff and salt-free or practically salt-free dyestuffs can be obtained, and waste-water is no longer charged with big amounts of salts.