Title:
POLYESTER DEGRADATION METHOD
Document Type and Number:
WIPO Patent Application WO/2022/171029
Kind Code:
A1
Abstract:
Disclosed in the present invention is a polyester degradation method. Specifically, the polyester degradation method disclosed in the present invention comprises the following steps: degrading a polyester under the action of a carboxylic acid and a catalyst, the polyester containing repeating units formed by a dicarboxylic acid and diol, and the catalyst being a Lewis acid and/or a sulfonic organic acid. The degradation method of the present invention has a wide application range, a resulting product dicarboxylic acid is easy to separate and can be used in resynthesis of the polyester, the catalyst can be recycled and reused, a resulting product diol dicarboxylic acid ester can be reduced by hydrogenation to form a carboxylic acid that can be repeatedly used for polyester degradation with the catalyst in a degradation liquid, so that the industrial benefits of polyester degradation are maximized.
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Inventors:
LI ZHI (CN)
SUN JIAYIN (CN)
LUO YUJI (CN)
SUN JIAYIN (CN)
LUO YUJI (CN)
Application Number:
PCT/CN2022/074943
Publication Date:
August 18, 2022
Filing Date:
January 29, 2022
Export Citation:
Assignee:
UNIV SHANGHAI TECH (CN)
International Classes:
C07C27/00; C07C29/00; C07C31/20; C07C51/00; C07C51/09; C07C53/00; C07C63/00; C07C63/26; C07C67/00; C07C69/00
Foreign References:
| CN111777489A | 2020-10-16 | |||
| CN106588628A | 2017-04-26 | |||
| CN110590534A | 2019-12-20 | |||
| CN104326907A | 2015-02-04 | |||
| CN107417492A | 2017-12-01 | |||
| CN1560108A | 2005-01-05 | |||
| CN108947798A | 2018-12-07 | |||
| US5413681A | 1995-05-09 | |||
| EP1134211A1 | 2001-09-19 | |||
| US6545061B1 | 2003-04-08 |
Attorney, Agent or Firm:
SHANGHAI BESHINING LAW OFFICE (CN)
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