A recycling method for multi-component mixed plastic waste

A waste, multi-component technology, applied in the recycling and reuse of microplastics in water bodies, and the recycling and reuse of multi-component mixed plastic waste Secondary pollution of the environment and other problems, to achieve the effect of easy operation, good commercial value, and protection of the living environment

Active Publication Date: 2022-05-13
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned existing technologies are only aimed at plastic wastes with one or two components. In the actual industrial recycling process of plastic wastes, the collected plastic wastes usually have multi-components mixed characteristics, but the existing technology does not have a proven and reasonable treatment method in the face of multi-component mixing of plastic waste and changes in the proportion of components.
If the above existing technologies are adopted, it is still necessary to sort and process multi-component mixed plastic waste
[0007] However, the microplastics in the water body show the characteristics of small particles, many components and mixed components after enrichment treatment, which cannot be recycled and reused through sorting treatment. cause secondary pollution

Method used

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  • A recycling method for multi-component mixed plastic waste
  • A recycling method for multi-component mixed plastic waste
  • A recycling method for multi-component mixed plastic waste

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Effect test

Embodiment 1

[0101] In this embodiment, a method for recycling multi-component mixed plastic waste mainly includes the following steps:

[0102] (1) Mix the collected plastic waste according to the following ratio:

[0103] Polypropylene waste 60%,

[0104] Polyethylene waste 5%,

[0105] Polyethylene terephthalate waste 15%,

[0106] Nylon 6 waste 20%,

[0107] The mixed plastic waste obtained after mixing, after washing and drying, is processed into plastic film strips with a long diameter of no more than 1 to 5 cm as recycling mixtures;

[0108] (2) Add the recovered mixed material obtained in step (1) into a millstone-type solid-phase mechanochemical reactor for grinding and pulverization. After the milling is completed, an ultrafine hybrid powder is collected; The process parameters of the device are: 20 cycles of grinding, the grinding pressure of the 1st to 5th cycle grinding is 5MPa, the grinding pressure of the 6th to 20th cycle of grinding is 8MPa, the speed of the grinding d...

Embodiment 2

[0112] In this embodiment, a method for recycling multi-component mixed plastic waste mainly includes the following steps:

[0113] (1) Mix the collected plastic waste according to the following ratio:

[0114] Polypropylene waste 60%,

[0115] Polyethylene waste 5%,

[0116] Polyethylene terephthalate waste 15%,

[0117] Nylon 6 waste 20%,

[0118] The mixed plastic waste obtained after mixing, after washing and drying, is processed into plastic film strips with a long diameter of no more than 1 to 5 cm as recycling mixtures;

[0119] (2) Add the recovered mixed material obtained in step (1) into a millstone-type solid-phase mechanochemical reactor for grinding and pulverization. After the milling is completed, an ultrafine hybrid powder is collected; The process parameters of the device are: 30 cycles of grinding, the grinding pressure of the 1st to 5th cycle grinding is 5MPa, the grinding pressure of the 6th to 30th cycle of grinding is 8MPa, the speed of the grinding d...

Embodiment 3

[0134] In this embodiment, a method for recycling multi-component mixed plastic waste mainly includes the following steps:

[0135] (1) Mix the collected plastic waste according to the following ratio:

[0136] Polypropylene waste 60%,

[0137] Polyethylene waste 5%,

[0138] Polyethylene terephthalate waste 15%,

[0139] Nylon 6 waste 20%,

[0140] The mixed plastic waste obtained after mixing, after washing and drying, is processed into plastic film strips with a long diameter of no more than 1 to 5 cm as recycling mixtures;

[0141] (2) Add the recovered mixed material obtained in step (1) into a millstone-type solid-phase mechanochemical reactor for grinding and pulverization. After the milling is completed, an ultrafine hybrid powder is collected; The process parameters of the device are: 30 cycles of grinding, the grinding pressure of the 1st to 5th cycle grinding is 5MPa, the grinding pressure of the 6th to 30th cycle of grinding is 9MPa, the speed of the grinding d...

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Abstract

The invention provides a method for recycling multi-component mixed plastic waste, wherein the components of the mixed plastic waste mainly include polypropylene, polyethylene, polyethylene terephthalate, nylon 6, and The above-mentioned multi-component mixed plastic waste is circulated and ground for 20 to 30 times in a disc type solid-phase force chemical reactor, and the collected ultrafine mixed powder is used to prepare recycled products or recycled materials. For multi-component mixed plastic waste, especially microplastics in water, this method can achieve good solid-phase compatibilization, viscosity matching, increase the reactivity between multi-component plastic polymers, and prepare a microplastic with good performance. Recycled products or recycled materials realize the high-value recycling and reuse of multi-component mixed plastic waste.

Description

technical field [0001] The invention belongs to the technical field of recovery and reuse of multi-component mixed plastic waste, and in particular relates to a method for recycling and reuse of multi-component mixed plastic waste, especially for the recovery and reuse of microplastics in water bodies. Background technique [0002] As an important part of polymer materials, plastic products have been widely used in various sectors of the national economy due to their advantages of low price, light weight, corrosion resistance, and easy processing, mainly in packaging, transportation, medical , national defense and military industry and other fields, plastic products are almost involved in all aspects of human production and life. The global output of plastic products has been increasing rapidly year by year, with a total output of about 400 million tons in 2019. However, while plastics bring great convenience to human production and life, they also bring huge environmental p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29B17/04B29B7/00B29C35/02C08L23/12C08L23/06C08L67/02C08L77/02B29L7/00
CPCB29B17/0412B29B7/005B29C35/02B29C35/002C08L23/12C08L2205/035B29B2017/0484B29L2007/002C08L23/06C08L67/02C08L77/02Y02W30/62
Inventor 李莉郭武刘兆港
Owner SICHUAN UNIV
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