Plastic processing method and processing system

The fluidized decomposition method addresses inefficiencies in waste plastic recycling by liquefying, reducing viscosity, and catalytically cracking plastics to produce valuable products, enhancing scalability and efficiency.

JP2025527543APending Publication Date: 2025-08-22CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Application Number
JP2025508929
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2022-10-27
Filing Date
2023-08-17
Publication Date
2025-08-22

AI Technical Summary

Technical Problem

Existing recycling technologies face challenges in efficiently processing waste plastics due to issues such as the formation of chlorinated hydrocarbons from polyvinyl chloride, slow heat transfer leading to excessive cracking, and low density affecting reactor entry, limiting their scalability and efficiency.

Method used

A method and system for fluidized decomposition of waste plastics involving liquefaction, viscosity reduction, catalytic cracking, and regeneration, which includes steps like melting, dechlorination, and separation to produce valuable products while removing impurities.

Benefits of technology

The method enables efficient, large-scale, and continuous recycling of waste plastics, reducing coke generation and increasing oil and gas production, with improved thermal conductivity and adaptability to various plastic types.

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Abstract

The present invention discloses a plastic processing method and processing system. The processing method includes the following steps: (S1) sending the plastic to be processed to a liquefaction unit and liquefying it to produce a liquefied substance; (S2) heat-treating the liquefied substance in a viscosity reduction unit to reduce the viscosity and produce a viscosity-reduced liquefied substance; (S3) sending the viscosity-reduced liquefied substance to a decomposition reaction unit and decomposing it to produce a reaction product; and (S4) sending the reaction product to a separation unit and separating it. The system includes a liquefaction unit, a viscosity reduction unit, a decomposition reaction unit, and a separation unit.
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Citation Information

Patent Citations

  • Method for catalytically cracking waste plastics and apparatus for catalytically cracking waste plastics

    CN101374930A

  • CN10461030

  • Harmless waste plastic treatment equipment and method

    CN106118707A

  • Method and device for preparing gasoline and diesel oil through cracking of waste plastics

    CN107746722A

  • Waste plastic continuous thermal cracking system and cracking method thereof

    CN109401774A