Method for recycling plastic products

A technology for plastic products and recycling, which is applied in the field of depolymerizing at least one polymer of plastic products and recovering the obtained monomers, and can solve problems such as inefficiency

Active Publication Date: 2015-09-23
卡比欧斯公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, to date, this recycling method has only been performed on purified polymers and has not been effective on raw plastics consisting of mixtures of crystalline and amorphous polymers with additives

Method used

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  • Method for recycling plastic products
  • Method for recycling plastic products
  • Method for recycling plastic products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0088] A] Aliphatic polyester recycling using enzymes

[0089] Thanks to the method of the invention, plastic articles comprising aliphatic polyesters such as PLA can be recycled. This experiment shows the recovery of lactic acid by treating plastic articles composed of semi-crystalline PLA with proteinase K.

[0090] Plastics and pretreatment

[0091] PLA pellets were purchased from NaturePlast (PLLA 001) and ground to a powder with a particle size of less than 500 μm using a universal mill Condux CUM 100.

[0092] In an aluminum pan, from -50°C to 300°C under a nitrogen atmosphere (50mL / min) at a scan rate of 10°C / min, using a Q 100TA-RCS 90 instrument, for approximately 8 mg of sample, using a differential scan Calorimetry (DSC) tests to determine the glass transition temperature (Tg) and crystallinity of polymers in plastic articles.

[0093] PLA powder has a Tg of 59°C and is semi-crystalline with a crystallinity of 14.9%.

[0094] Hydrolysis reaction

[0095] Hydr...

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Abstract

The invention relates to a method for recycling at least one plastic product, the method comprising degrading at least one polymer of the plastic product to monomers using an enzyme and recovering the resulting monomers. The method of the invention may be used for degrading, simultaneously or sequentially at least two different polymers of the plastic product, and / or for recycling at least two plastic products.

Description

technical field [0001] The present invention relates to a method for recycling plastic articles such as waste plastic. More particularly, the present invention relates to a biological process for depolymerizing at least one polymer of a plastic article and recovering the resulting monomers, which can be further reprocessed to synthesize new polymers and manufacture new plastic articles. Background technique [0002] Plastic is an inexpensive and durable material that can be used to manufacture a wide variety of products for a wide range of applications, resulting in a dramatic increase in the manufacture of plastics over the past decade. About 40% of these plastics are used in single-use applications such as packaging, agricultural films, single-use consumer products or for short-term products that are discarded within a year of manufacture. Because of the durability of the polymers involved, large quantities of plastics accumulate in landfills and natural habitats around t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/10
CPCC08J2377/00C08J2367/04C08J11/105Y02W30/702Y02W30/62B29B17/00B29B17/0412B29K2101/12B29K2105/26C12P7/44C12P7/56
Inventor 赛德利克·布瓦萨尔特埃曼努埃尔·迈莱
Owner 卡比欧斯公司
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