High-purity active black printing dye

Abstract

The invention provides a high-purity active black printing dye. The dye comprises the following components in percentage by weight: 65-75% of active black 5, 12-22% of active orange 7, 11-16% of active orange 72 and 1-6% of a cosolvent, wherein the cosolvent is inorganic salt electrolyte; the active black 5, the active orange 7 and the active orange 72 are raw powder dyes prepared by nanofiltering, desalting, atomizing and drying reaction liquid after synthesizing the dyes. The dyes used by the high-purity active black printing dye are vinyl sulfone dyes and are the same in aging time and temperature after printing; the color fixation is sufficient; the color fixation rate is increased; the desalination rate of the nanofiltered and desalted dyes is greater than 98%; the dye is high in purity, low in content of salt and excellent in printing levelling property; the salt emission amount in wastewater can be reduced.

Description

technical field [0001] The invention relates to a high-purity reactive black dye for printing, which belongs to the technical field of dyes. Background technique [0002] Reactive dye printing has the characteristics of bright color, simple and convenient preparation of color paste, convenient printing process, complete color samples, low cost, simple process, and good wet fastness. It has become one of the dyes widely used in fabric printing. A large amount of inorganic salts will be generated during the synthesis of reactive dyes, and inorganic salts will also be added during the commercialization process, resulting in low dye purity and high salt content. Most of the salt in the dye enters the water circulation system, resulting in high salt content in the sewage of printing and dyeing factories. , Biochemical treatment is difficult. [0003] Black reactive dyes are the most widely used reactive dyes and are hot products in the market. The ideal reactive black dyes requi...

AI Technical Summary

Problems solved by technology

[0005] The raw materials used in the reactive black combination for printing introduced in the above patents are mostly reactive red and reactive yellow or a single dye reactive orange. The absorption peaks of reactive red and reactive yellow are relatively sharp, and the single dye reactive orange or two dyes reactive red and reactive yellow Combination with reactive black can not achieve particularly uniform absorption in the visible absorption light region, which has a certain impact on the blackness of reactive black

In addition, a large amount of salt is produced in the synthesis of dyes, the purity of the dye is low, and the salt content is high. A large amount of salt enters the sewage, resulting in high COD of sewage and difficult biochemical treatment.