Title:
METHOD FOR RECYCLING BLENDED FABRIC CONTAINING POLYESTER
Document Type and Number:
WIPO Patent Application WO/2023/155367
Kind Code:
A1
Abstract:
The present invention relates to the recycling of textiles, and in particular, to a method for recycling a blended fabric containing polyester. The method comprises: treating a starting material to be treated containing polyester, subjecting the material to polyester degradation in the presence of a catalyst at 40-120 °C for 0.5-8 hours to achieve complete depolymerization, separating, and recycling the separated polyester component and other blended fabric components for reuse. The method of the present invention achieves 100% depolymerization of the polyester in a low-temperature condition, and can easily separate the depolymerized polyester component from other components, thus achieving complete separation of the polyester and other thermosensitive fiber components in the blended fabric. The depolymerized polyester monomer obtained by the recycling can also be used for the synthesis of a new polyester, thus achieving closed-loop recycling of different fiber components in the waste blended fabric containing polyester. The method has great significance in protecting the ecological environment and reducing the cost of regenerated fibers.
Inventors:
LIU HONGGANG (CN)
GUO QING (CN)
GUO CAIHONG (CN)
MAO DEBIN (CN)
HU WENJIAN (CN)
WAN XIAOBO (CN)
MU YOUBING (CN)
GUO QING (CN)
GUO CAIHONG (CN)
MAO DEBIN (CN)
HU WENJIAN (CN)
WAN XIAOBO (CN)
MU YOUBING (CN)
Application Number:
PCT/CN2022/104576
Publication Date:
August 24, 2023
Filing Date:
July 08, 2022
Export Citation:
Assignee:
QINGDAO AMINO MATERIAL TECH CO LTD (CN)
International Classes:
C07C69/82; C07C67/62; C08J11/18; C08J11/28; C08L67/00
Domestic Patent References:
| WO2021126661A1 | 2021-06-24 |
Foreign References:
| CN103930395A | 2014-07-16 | |||
| US20110004014A1 | 2011-01-06 | |||
| CN105658611A | 2016-06-08 | |||
| CN102250379A | 2011-11-23 | |||
| CN108602974A | 2018-09-28 |
Attorney, Agent or Firm:
SHENYANG PATENT & TRADEMARK AGENCY ACADEMIA SINICA (CN)
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