Method for decoloring textile materials

By treating textile materials with anionic polyelectrolytes in alkaline solutions, the problem of low decolorization efficiency in existing technologies has been solved, achieving efficient separation of cellulose fibers and polyester fibers in textile material decolorization and recycling processes.

CN116917103BActive Publication Date: 2026-06-09瑟德拉斯科格萨加纳经济学会
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
瑟德拉斯科格萨加纳经济学会
Filing Date
2022-02-28
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing textile decolorization processes are inefficient and complex, especially when combined with textile recycling processes, making it difficult to effectively remove dyes and pigments.

Method used

Textile materials are treated with an alkaline solution containing anionic polyelectrolytes at a temperature of 100°C to 180°C for at least 10 minutes. The anionic polyelectrolytes, such as CMC, in the alkaline solution disperse and solubilize pigments and dyes, thereby achieving decolorization of the textile materials.

Benefits of technology

It significantly improves the decolorization efficiency of textile materials, effectively removes dyes and pigments, and is suitable for the separation of cellulose fibers and polyester fibers in the recycling process of textile materials.

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Abstract

The invention relates to a method for decolorizing a textile material, the method comprising the steps of: providing a textile material; providing an alkaline solution containing one or more anionic polyelectrolytes; treating the textile material in the alkaline solution during a treatment period; recovering at least a portion of the textile material from the alkaline solution.
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Citation Information

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