Liquid substitution alkali and preparation method thereof

Abstract

The invention relates to the technical field of dyeing and finishing, particularly to a liquid substitution alkali and a preparation method thereof. The liquid substitution alkali is composed of, by weight percentage, 13-23% of tripotassium phosphate, 15-25% of potassium hydroxide, 1-3.5% of sodium hydroxide, 4-10% of sodium silicate, 1-3% of hydroxyethylidene diphosphonic acid and 35.5-67% of distilled water. The liquid substitution alkali is high in color fixation efficiency and effects, good in solubility, easy to wash and environmentally friendly.

Description

Technical field [0001] This field relates to the technical field of dyeing and finishing, in particular to a liquid substitute alkali and a preparation method thereof. Background technique [0002] Reactive dyes are mainly used in the dyeing of cotton, linen, viscose, silk, wool and other fibers and their blended fabrics. They have the advantages of bright colors, good level dyeing, and simple dyeing methods. Soda ash is a commonly used fixing agent in the dyeing process, but it has the following shortcomings: (1) The fixing efficiency is not high, and a concentration of more than 20g / L is generally required to obtain a good fixing effect; (2) The solubility of soda ash is low, resulting in The chemical material is inconvenient and it is easy to form alkali spots on the cloth sample; (3) After the dyeing is completed, the alkali agent concentration in the residual liquid is relatively high, and the waste water treatment cost is high. [0003] Existing substitute bases such as subs...

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Problems solved by technology

Soda ash is a commonly used color fixing agent in the dyeing process, but it has the following disadvantages: (1) the color fixing efficiency is not high, generally a concentration of more than 20g / L is required to obtain a good color fixing effect; (2) the solubility of soda ash is low, resulting in The chemical is inconvenient, and it is easy to form alkali spots on the cloth sample; (3) After the dyeing is completed, the concentration of alkali agent in the residual liquid is high, and the cost of wastewater treatment is high

However, these alternative alkalis have poor buffering performance, unstable pH value or crystallization phenomenon, which may easily lead to problems such as unstable color fixing effect, light color, uneven dyeing, etc.; some products have high cost

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