Technique for synthesizing improved disperse red 191

Abstract

The invention relates to a synthesis technique improvement of disperse red 191 which takes the disperse red 60 and hexanediol monobenzyl ether of hydioquinone as raw materials, uses potassium carbonate or potassium hydroxide as an acid binding agent and uses an emulsifier of OP series as a catalyst; after the raw materials are condensed at high temperature to the terminal, the product can be segregated by methanol (or ethanol) when the temperature is cooled, and at last the product is filtrated and separated. The mother liquid is rectified to recycle the methanol (or ethanol), phenol and hexanediol monobenzyl ether of hydioquinone, and the technique improves the product quality.

Description

Technical field: [0001] The invention relates to an improved synthesis process for preparing Disperse Red 191 (C.I. Disperse Red 191). Background technique: [0002] Disperse Red 191 (C.I.Disperse Red 191) is used in the dyeing and printing of polyester and its blended fabrics. It has good light fastness and is widely used in the dyeing of fabrics in high-end places such as automobiles. General information is introduced with 1-aminoanthraquinone bromination , The hydrolyzate is condensed with ethylene glycol monophenyl ether. However, in actual production, the product quality obtained by this route is often not recognized. Invention content: [0003] Disperse Red 60 and ethylene glycol monophenyl ether are used as raw materials, potassium carbonate or potassium hydroxide is used as an acid-binding agent, and OP series emulsifiers are used as a catalyst. , and the product was isolated by filtration. Mother liquor rectification recovers respectively methanol (or ethanol),...

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Problems solved by technology

However, in actual production, the product quality obtained by this route is often not recognized.

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