New process for synthesizing reduced olive T dye

Abstract

The invention discloses a reducing olive T dye synthesizing novel technique. The technique comprises the following steps: firstly, 3, 9-dibromo benzanthrone, 1-aminoanthraquinone, calcined soda and copper oxides are placed into a solid-phase condensation device; after mixing, dehydration, temperature rise, heat preservation, condensation reaction and crushing, condensation compound T imine is obtained; secondly, the ring-closure reaction of the condensation compound T imine is generated in a ring-formed medium and then a reducing olive T filter mass is obtained after dilution, oxidation, waterscrubbing in a filter and blowing; thirdly, after remixing, sand grinding, standardization and drying of raw dye through addition agent, a commodity is prepared, wherein, the ring-closure reaction isto use reducing deep-blue BO raw dye mother solution after evaporation and concentration as ring forming agent and to perform ring forming reaction with the imine. The reducing olive T dye synthesizing novel technique has the advantages that: the reducing deep-blue BO mother solution which is produced by the company is recycled and used for ring closure of the reducing olive T, thereby not only greatly reducing the production cost of the raw dye and improving the product quality but also reducing pollution and emission of the three wastes. Moreover, the olive T imine also can be cycled and concentrated for use after passing through filter mass washing mother solution after ring closure.

Description

technical field

[0001] The invention belongs to the technical field of dyes. Specifically, it is a new technique for synthesizing vat olive T dye. Background technique

[0002] Reduced olive T is a black powder. The original dye is a dark brown filter cake. It is green when dissolved in concentrated sulfuric acid. After dilution, it becomes a black precipitate. When it is reduced to a leuco body in an alkaline medium, it is gray, and in an acidic state, it is dark olive green. Mainly used for cotton fiber dyeing, generally not used for printing, suitable for suspension pad dyeing, can match color with other vat dyes, used for dyeing cotton and polyester-cotton khaki, and can also be used for dyeing silk and wool. Excellent light performance and washing fastness.

[0003] Its traditional production process is:

[0004] 1. Condensation reaction: 3,9-dibromobenzothrone, 1-aminoanthraquinone, soda ash, and copper oxide are in the solid-phase condenser. After mixing, dehydrati...