METHOD FOR TREATING USED PLASTICS BY DISSOLVING THE POLYMERS AND PURIFYING THEM BY WASHING

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United States of America Patent

APP PUB NO 20240042650A1
SERIAL NO

18266646

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Abstract

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The present invention relates to a process for treating a plastic feedstock comprising polymers, comprising:

    a) a dissolution step involving placing the plastic feedstock in contact with a dissolution solvent, at a dissolution temperature of between 100° C. and 300° C. and a dissolution pressure of between 1 and 20.0 MPa abs, to dissolve at least a portion of the polymers of the plastic feedstock and to obtain a crude polymer solution;b) a step of washing by placing the crude polymer solution in contact with a dense solution, at a temperature of between 100° C. and 300° C., a pressure of between 1 and 20.0 MPa abs and at a mass ratio between the dense solution and the crude polymer solution of between 0.05 and 20.0, to obtain a washed polymer solution and a washing effluent; and thenc) a step of recovering the polymers, to obtain a solvent fraction and a purified polymer fraction. FIG. 1 to be published

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Patent Owner(s)

Patent OwnerAddress
IFP ENERGIES NOUVELLES1 & 4 AVENUE DU BOIS PREAU RUEIL-MALMAISON CEDEX 92852

International Classification(s)

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  • 2021 Application Filing Year
  • B29B Class
  • 415 Applications Filed
  • 163 Patents Issued To-Date
  • 39.28 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances202120222023202420250255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
AHMADI-MOTLAGH, Amir Hossein Rueil Malmaison Cedex, FR 6 0
HAROUN, Yacine Rueil Malmaison Cedex, FR 36 252
LEINEKUGEL, LE COCQ Damien Rueil Malmaison Cedex, FR 42 74
WEISS, Wilfried Rueil Malmaison Cedex, FR 61 909

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Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges294701 - 10020406080100120140160180200220240260280300320

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