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US 12,247,348 B2Granted
Method for decoloring of a textile material
AssigneeSöDra SkogsäGarna Ekonomisk FöRening
InventorsJim Parkås, Anna Palme, Harald Brelid
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Abstract
Described is a method for decoloring of a textile material, the method includes 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; and recovering at least some of the textile material from the alkaline solution.
Claims15
A method for recycling and decoloring of a textile material, the method comprising the steps of:
- providing a textile material comprising polyester fibers and cellulosic fibers, at least a portion of the textile material being colored;
- providing an alkaline solution containing one or more anionic polyelectrolytes selected from the group consisting of:
- carboxymethyl cellulose (CMC), a carboxyalkyl ether of cellulose, a carboxyalkyl ether of starch, a carboxyalkyl ether of amylose, a carboxyalkyl ether of amylopectin and a carboxyalkyl ether of a natural gum, or a combination thereof;
- treating the textile material in the alkaline solution during a treatment period of at least 10 minutes at a temperature in the range of from 100° C. to 180° C.;
- separating the cellulosic fibers from the textile material;
- and
- recovering the cellulosic fibers from the alkaline solution after the treatment period,
- wherein the method comprises a step of mechanically disintegrating the textile material before treating it in the alkaline solution.
5 more elements
Dependencies are inferred from the claim text.