Method of reusing a mixed textile comprising cellulose and synthetic plastic

Patent metadata

Field	Value
Publication number	US-11987906-B2
Application number	US-201916962498-A
Country	US
Kind code	B2
Filing date	Jan 14, 2019
Priority date	Jan 15, 2018
Publication date	May 21, 2024
Grant date	May 21, 2024

Abstract

A method of recycling a mixed textile, wherein the method comprises: i) supplying the mixed textile, wherein the mixed textile comprises cellulosic fibers and synthetic fibers, wherein the synthetic fibers comprise at least one synthetic plastic, ii) at least partially depleting the synthetic plastic from the cellulose, and iii) further processing the depleted mixed textile after depleting.

First claim

The invention claimed is:

1. A method of recycling a mixed textile, wherein the method comprises:
supplying the mixed textile, wherein the mixed textile comprises cellulosic fibers and synthetic fibers, wherein the synthetic fibers comprise at least two synthetic plastics;
selectively depleting a first synthetic plastic from the mixed textile;
partially retaining a second synthetic plastic in the mixed textile; and
after selectively depleting the mixed textile, further processing the depleted mixed textile which comprises the cellulose and the second synthetic plastic.

2. The method according to claim 1 , wherein the first synthetic plastic and/or the second synthetic plastic is at least one of the group which is consisting of polyester, polyamide, polyurethane, polyether, and elastane.

3. The method according to claim 1 , wherein the mixed textile comprises or consists of cellulose in form of cotton.

4. The method according to claim 1 , wherein the mixed textile completely or partially comprises remains from a clothing manufacture and/or used clothes.

5. The method according to claim 1 , further comprising:
cleaning the cellulose, wherein the cleaning takes place between the selectively depleting and the further processing.

6. The method according to claim 1 , wherein the first synthetic plastic comprises:
at least one of polyamide, polyester, polypropylene, polyurethane, or elastane.

7. The method according to claim 1 , wherein the selectively depleting further comprises:
completely removing at least one of the two synthetic plastics from the mixed textile.

8. The method according to claim 1 , wherein the second synthetic plastic comprises at least one of polyamide, polyester, polyurethane, or elastane.

9. The method according to claim 1 , wherein the first synthetic plastic is polyamide and/or polyurethane;
wherein the second synthetic plastic is polyethylene terephthalate, PET, and/or polypropylene; and
wherein the selectively depleting further comprises:
depleting the first synthetic plastic to a first concentration value;
depleting the second synthetic plastic to a second concentration value, wherein the first concentration value is different from the second concentration value.

10. The method according to claim 1 , wherein the selectively depleting further comprises at least one of:
mechanically separating; and/or
chemically separating.

11. The method according to claim 1 , further comprising:
supplying at least one further mixed textile which comprises cellulose and at least one synthetic plastic,
wherein the portion of synthetic plastic in the mixed textile and in the further mixed textile is different, such that an obtained plastic-composition comprises at least one predetermined property.

12. The method according to claim 1 , wherein the further processing comprises a lyocell-method or a viscose-method for generating a regenerated cellulosic molded body.

Assignees

• Chemiefaser Lenzing Ag

Inventors

• Klaus-Nietrost Christoph
• Herchl Richard
• Weilach Christian

Classifications

• D01F13/02 Primary

  of cellulose, cellulose derivatives or proteins {(recovery of sodium sulfate from coagulation baths C01D5/006)} · CPC title

• B29B17/04

  Disintegrating plastics, {e.g. by milling}(B29B9/02, B29B11/02, B29B13/10, {B29B17/02} take precedence) · CPC title

• D01F2/08

  Composition of the spinning solution or the bath · CPC title

• D01F2/22

  by the dry spinning process · CPC title

• D01F13/04

  of synthetic polymers · CPC title