Oxidant for dyeing of sulfide dye

Abstract

An oxidant for dyeing of a sulfide dye comprises components of sodium chlorate, sodium vanadate or ammonium vanadate, sodium chloride and water for adjusting concentration. The part of weight of each component is that sodium chlorate 10-80 parts, sodium vanadate or ammonium vanadate 0.5-10 parts, sodium chloride 1-60 parts, the remaining part is water, wherein the use environment of the oxidant is that a dye vat of a jig dyeing machine contains 0.5-4% (o.w.f) of oxidant, 98% of acetic acid or 30% of sulfuric acid 1-6% (o.w.f) and four to six paths (note: the distance of one path is from one end of a roll of dye cloth to the other end of the roll of dye cloth in the dye vat), and temperature is 60-65DEG C. The oxidant for dyeing of the sulfide dye selects chlorate with low price to serve as an oxidation treatment agent, solves the problem of serious environment pollution caused by traditional sodium dichromate oxidation treatment, color fastness and hydrophilism are good, convenient conditions are provided for treatment after dyeing, repeated water washing and multiple soaping and color toning are not needed after oxidation treatment, and the problems of cloth surface sour, rough touch and dark color and light are solved.

Description

technical field [0001] The invention relates to an oxidizing agent for sulfur dyeing. Background technique [0002] Sulfur dyes are favored by printing and dyeing factories because of their pure shade, high color yield and low price. There are many oxidants that can be used as sulfur dyes, such as sodium dichromate + acetic acid (sulfuric acid), hydrogen peroxide, sodium perborate, sodium bromate, sodium iodate + acetic acid, etc. The process of using hydrogen peroxide and sodium perborate is not easy to master, and it is easy to cause peroxidation or insufficient oxidation, which leads to inconsistent color and light and poor wet fastness of dyeing; the method of sodium iodate + acetic acid is easy to control and has good reproducibility, but the cost is high. Value in use: The sodium bromate + acetic acid method is also easy to control the reproducibility, but the cost is relatively high and bromine gas pollution is likely to be generated during the use process, which...

AI Technical Summary

Problems solved by technology

The process of using hydrogen peroxide and sodium perborate is not easy to master, and it is easy to cause peroxidation or insufficient oxidation, which leads to inconsistent color and light and poor wet fastness of dyeing; the method of sodium iodate + acetic acid is easy to control and has good reproducibility, but the cost is high. Use value: it is easy to control the reproducibility with sodium bromate + acetic acid method, the cost is relatively high and bromine gas pollution is easy to be generated during the use process, which will cause great harm to people and the environment

Therefore, for a long time, dyeing factories have adopted the traditional potassium dichromate + acetic acid (sulfuric acid) method for oxidation treatment. This oxidation bath has stable color and light, is fast and complete, and will not cause excessive oxidation; the disadvantage is that black gas will be generated on the cloth surface after treatment. (Dark shade) Feels rough, if the follow-up washing water is not clean, it will easily form chromium soap, resulting in poor hydrophilicity and sour taste on the cloth surface; its fatal weakness is its high toxicity, and the produced sewage contains a certain amount of hexavalent chromium toxic compounds , hexavalent chromium has a great harmful effect on crops, microorganisms and other organisms

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