US 2025/0145790 A1 · METHOD FOR REGENERATING BIODEGRADABLE POLYMERS

Abstract

The present invention relates to a method for regenerating biodegradable polymers. According to the method for regenerating biodegradable polymers, by reacting specific biodegradable polymers or a combination thereof with a depolymerization composition comprising a specific solvent and an acid catalyst, the specific biodegradable polymers or the combination thereof are monomerized with high yield at a relatively low temperature and thus could easily be regenerated as a raw material for initial polymer synthesis.

Claims14

Dependent claims

A process for regenerating a biodegradable polymer, which comprises:

reacting a biodegradable polymer with a composition for depolymerization to obtain a monomer mixture,
wherein the biodegradable polymer comprises a polylactic acid (PLA), a polyhydroxyalkanoate (PHA), or a combination thereof,
the composition for depolymerization comprises a primary alcohol, a non-polar aprotic solvent, and a Brønsted-Lowry acid catalyst, and
the reaction is carried out at 90° C. or higher.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

18/835,604Filed 15 Feb 2023

Priority

KR 10-2022-002020016 Feb 2022

Published

8 May 2025

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

C08J 11/24
By treatment with organic oxygen-containing compounds: containing hydroxyl groups
B01D 3/10
Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping: vacuum distillation
B01D 11/04
Solvent extraction: of solutions which are liquid
C08J 11/28
By treatment with organic material: by treatment with organic compounds containing nitrogen, sulfur or phosphorus

Method for regenerating biodegradable polymers

Life of this patent

Method for regenerating biodegradable polymers

Life of this patent

Abstract

Claims14