Non-aqueous solvent composition with temperature control separation performance for active dye

Abstract

The invention provides a non-aqueous solvent composition with temperature control separation performance for active dye. The composition comprises good solvent of the active dye and poor solvent of active dye, wherein the volume ratio of the good solvent to the poor solvent is 1: (3-20); the good solvent of the active dye is the non-aqueous solvent capable of dissolving the active solvent and not having chemical reaction with the active dye; the poor solvent of the active dye is the non-aqueous solvent not capable of dissolving the active dye and not having chemical reaction with the active dye. The solvent system has advantages that after one dye period is ended, a purpose for separating the solvent can be achieved only by reducing the temperature of the solvent, the two solvents can be automatically separated after the temperature is lowered and can be recycled, and the mixture of the solvent does not need to be separated by adopting the energy-consuming and time-consuming distilling procedure, so that the cycling time is greatly reduced, the energy consumption is reduced, and the dyeing cost is remarkably reduced.

Description

technical field [0001] The invention relates to a non-aqueous solvent composition with temperature-controlled separation performance for reactive dye solvent dyeing, belonging to the technical field of textile dyeing and finishing. Background technique [0002] At present, reactive dyes are mostly used in the dyeing of cotton fabrics. During the dyeing process, due to the hydrolysis of the active groups in the water medium, not only a large amount of reactive dyes are wasted, but also a large amount of water is consumed and a large amount of high-color dyes that are difficult to handle are discharged during the dyeing process. High-degree sewage, which is also an insurmountable bottleneck for reactive dyes. [0003] In order to avoid the hydrolysis reaction of reactive dyes and improve the utilization rate of reactive dyes, scientists have paid attention to and studied the dyeing of reactive dyes in non-aqueous media very early. The advantage of dyeing with non-aqueous medi...

AI Technical Summary

Problems solved by technology

Although there are many difficulties in the dyeing of reactive dyes in non-aqueous media, the cost of water is gradually rising at the current stage, people pay more and more attention to environmental protection, and the dyeing of reactive dyes in non-aqueous media has attracted more and more attention due to its good application prospects.