Method for preparing bright yellow active dye stuff K-6G

Abstract

The related preparation method for bright-yellow reactive dyes K-6G for dyeing and printing to cotton, hair, silk, leather, polyamide synthetic fabric and other fibre mix-fabric comprises: with 2, 4-sodium biaminobenzoic sulfonate, cyanuric chloride, NaNO2, HCl, 3-carbamoyl-4-methyl-6- hydroxyl-N-acetaldehydepyridone, and sodium p-anilinesulfonate as materials; dissolving, first condensing, neutralizing, coupling, second condensing, spray drying, blending, and obtaining the target. This invention can reduce pollution and cost, and has high yield fit to industrial production.

Description

Technical field [0001] The invention relates to a preparation method of a bright yellow reactive dye K-6G suitable for dyeing and printing cotton, wool, silk, leather, polyamide synthetic fiber and other blended fiber fabrics. Background technique [0002] Reactive dyes have outstanding characteristics such as bright color, excellent application performance, convenient use and strong applicability. In the past 20 years, due to environmental and ecological constraints and economic factors, the requirements for the production and preparation of reactive dyes, dye uptake, fixation rate, and dyeing wastewater have become higher and higher. In patent applications related to reactive dyes, the salting out The preparation process is no longer common, and the research and development of reactive dyes in various countries has evolved from the salting-out process to the spray drying process. At present, there is a bright yellow reactive dye whose molecular structure is shown in formula I: ...

AI Technical Summary

Problems solved by technology

The fastness to chlorine bleaching is poor, so it is not suitable for fabrics that require chlorine bleaching or high chlorine bleaching resistance after dyeing. It can also be used for printing, and the products produced by the salting out process have low color yield, color fixation rate and solubility.

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