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Method for recovering caprolactone from poly(epsilon-caprolactone) waste

A caprolactone polymer, caprolactone technology, applied in the direction of organic chemistry, can solve the problem of high temperature, achieve the effects of good universality, enhanced production efficiency, and economical production cost

Active Publication Date: 2022-02-11
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also some literatures on the pyrolysis of polyε-caprolactone (PolymerDegradation and Stability 80(2003) 11-16), but the temperature used therein is too high and the product formed is not caprolactone

Method used

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  • Method for recovering caprolactone from poly(epsilon-caprolactone) waste
  • Method for recovering caprolactone from poly(epsilon-caprolactone) waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Double (double trimethylsilicide) amine magnesium-involved poly ε-caprolactone depolymerization.

[0027]

[0028] The experiment process includes the following steps:

[0029] Poly ε-hexyxer was added (11.4 g, 1000equiv.) Was added to the three flasks, and then bis (double trimethylsilicide-based) amine magnesium phasing reagent (0.138 g, 4equiv.) Was added to the glove box. The temperature was heated to 180 ° C while the decompression (0.3 mbar) was distilled off 7 h to obtain the ethylene derivative product. The monomer hexhane is obtained. The yield was 85%.

Embodiment 2

[0031] Double (double trimethylsilicide) amine magnesium-involved poly ε-caprolactone depolymerization.

[0032] The experiment process includes the following steps:

[0033] Add poly ε-hexyxerry waste (114.0 g, 1000equiv.) In a three flask (114.0 g, 1000equiv.) And then added a bis (double trimethylsilicide) amine magnesium polymerization reagent (1.38 g, 4equiv.). The temperature was heated to 180 ° C while the decompression (0.3 mbar) was distilled 8h to obtain the erythoxide of the polymerized product. The monomer-caprolactone 112 g was obtained. The yield was 98%.

Embodiment 3

[0035] Double (double trimethylsilicide) amine magnesium-involved poly ε-caprolactone depolymerization.

[0036] The experiment process includes the following steps:

[0037] Add poly ε-adiponic waste (11.4 g, 1000equiv.) In three flasks, and then added a double (double trimethylsilicide) amine magnesium polymerization reagent (34.5 mg, 1equiv.) In a glove box. The temperature was heated to 180 ° C while the decimination of the decompression (0.3 mbar) was evaporated. The monomer hexhane is obtained from 9.5 g. The yield was 83%.

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PUM

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Abstract

The invention discloses a method for recovering caprolactone from poly(epsilon-caprolactone) waste, and belongs to the technical field of polyester waste material depolymerization. According to the method, an economical metal catalyst is adopted for catalysis, the poly(epsilon-caprolactone) waste is subjected to depolymerization reaction recovery under the heating and vacuum conditions to obtain the polymeric monomer caprolactone, and directional recovery of the poly(epsilon-caprolactone) waste is achieved. The recycled monomer caprolactone can be directly reutilized, so that the industrial production steps are reduced, the production efficiency is enhanced, the industrial cost is reduced, the sustainable development principle is met, and the environmental pollution is reduced.

Description

Technical field [0001] The present invention relates to a method of recovering hexylolide from poly ε-caprolactone waste, belonging to the field of polyester waste materials. Background technique [0002] Aliphatic polyester biomass material as a perfect alternative to petroleum derived materials, can be produced by bio-photocharging by carbon dioxide, water and sunlight, which can be produced by bioplasmic, and has carbon emissions. Target for zero. The polyester material is widely used in packaging materials, 3D printing industries, biomedical fields and tissue projects due to their biocompatibility and degradation, especially polysyl ε-caprolactone materials. The more attention. However, a large number of poly ε-caprolactone materials also triggered the post-treatment of discarded polyester. Although poly ε-caprolactone can be degraded as carbon dioxide and water as a degradable polymer, this usually requires a particular harsh environmental condition, and time consuming. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D313/04
CPCC07D313/04Y02W30/62
Inventor 王庆刚徐广强苏家丰
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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