Title:
METHOD AND SYSTEM FOR RECOVERING FIBERS FROM FIBROUS PRODUCTS
Document Type and Number:
WIPO Patent Application WO/2020/252683
Kind Code:
A1
Abstract:
For recycling, fibers are recovered from fibrous products by using two or more hydrothermal reactors to conduct hydrolysis. The fibrous products are divided into batches. A batch to be hydrolyzed is fed to a selected reactor under atmospheric pressure. A superheated reaction solution containing subcritical water and one or more organic acids is transferred alternately and/or successively among the reactors to hydrolyze respective batches in the reactors. By using two or more reactors to carry out the heat treatment, it is possible to reuse the organic acid-containing reaction solution without discarding. Since the reaction solution, maintained at a high temperature, can be recycled without discarding and cooling, high material-utilization efficiency and high energy efficiency is achievable. Furthermore, a system for recovering the fibers is realizable compactly to occupy a small space since the cooling equipment is not required and only two reactors need to be installed.
Inventors:
KEH EDWIN YEE MAN (CN)
YAO LEI (CN)
CHAN ALEX HOK CHUNG (CN)
LIU YANG (CN)
LEUNG JOHN KIN MING (CN)
CHAN JASON LAP HUNG (CN)
CHEN COLLIN XIN (CN)
CHAN PHILIP YUN NGOK (CN)
KAJIWARA KANJI (CN)
SUZUOKA AKIHIRO (CN)
YAO LEI (CN)
CHAN ALEX HOK CHUNG (CN)
LIU YANG (CN)
LEUNG JOHN KIN MING (CN)
CHAN JASON LAP HUNG (CN)
CHEN COLLIN XIN (CN)
CHAN PHILIP YUN NGOK (CN)
KAJIWARA KANJI (CN)
SUZUOKA AKIHIRO (CN)
Application Number:
PCT/CN2019/091846
Publication Date:
December 24, 2020
Filing Date:
June 19, 2019
Export Citation:
Assignee:
HONG KONG RES INST TEXTILES & APPAREL LTD (CN)
International Classes:
C08J11/06; C08J11/02; D01F2/00
Domestic Patent References:
| WO2016198781A1 | 2016-12-15 | |||
| WO2011114909A1 | 2011-09-22 |
Foreign References:
| CN106674588A | 2017-05-17 | |||
| CN102974593A | 2013-03-20 | |||
| CN107629245A | 2018-01-26 | |||
| CN109467740A | 2019-03-15 |
Attorney, Agent or Firm:
BEIJING PAT SF INTELLECTUAL PROPERTY AGENCY CO. LTD (CN)
Download PDF: