Wang Zhou-xing
2008
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Journal
Henan Chemical Industry
Abstract
The method of converting the waste residue of 1-amino anthraquinone production into valuable dispersible reddish brown E-3R is introduced in this paper.The main constituents of this waste residue are not only the unreacted anthraquinone and 1-nitro anthraquinone,but also byproduct of 1,5(or 1,8)-dinitroanthraquinone.The anthraquinone and 1-nitro anthraquinone in the waste residue were first converted into 1,5(or 1,8)-dinitroanthraquinone by nitration,and then the(1,5 or 1,8)-dinitroanthraquinone was reduced into the corresponding 1,5(or 1,8)-diaminoanthraquinones,and then the chlorinated dye was obtained by chlorination.One kind of dispersing dyes,dispersing reddish brown E-3R can be produced by adding dispersant into the original dye and then processing.