CAS: 12217-79-7; 1,5-Diamino-2-Chloro-4,8-Dihydroxyanthracene-9,10-Dione

2,8-Dichloro-1,5-Dinitroanthraquinone置于硫化氢,硼酸,氯体系中,化学反应生成1,5-二羟基-4,8-二氨基蒽醌溴化物
参考文献:Us4045457
标题:Us4045457

专利信息

专利号:US-4045457-A
优先权日:1974-10-23
标题:Anthraquinone dyestuffs
发明人：GEHRKE GUNTER; SCHMITZ REINOLD; BIEN HANS-SAMUEL; HERZOG HELMUT
权利人:BAYER AG
摘要:The invention relates to a process for the preparation of water-insoluble chlorine-containing diaminodihydroxyanthraquinone dyestuffs. The process consists in that 2,8-dichloro-1,5-dinitroanthraquinone and/or 2,5-dichloro-1,8-dinitroanthraquinone is warmed with sulphur in concentrated sulphuric acid having a maximum SO 3 content of 20% - possibly in the presence of boric acid - the resulting compounds are, if appropriate, post-halogenated and/or alkylated, preferably in the same reaction batch. n The main advantage of this process is that it starts from 1,6- and/or 1,7-dichloroanthraquinone, for which there was hitherto no industrial use, but which unavoidably also arise during the synthesis 1,5- and 1,8-dichloroanthraquinones.