METHOD FOR TREATING USED PLASTICS BY DISSOLVING THE POLYMERS AND PURIFYING THEM BY WASHING
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United States of America Patent
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Feb 8, 2024
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Dec 2, 2021
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Dec 14, 2020
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Abstract
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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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
IFP ENERGIES NOUVELLES | 1 & 4 AVENUE DU BOIS PREAU RUEIL-MALMAISON CEDEX 92852 |
International Classification(s)

- 2021 Application Filing Year
- B29B Class
- 415 Applications Filed
- 163 Patents Issued To-Date
- 39.28 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
AHMADI-MOTLAGH, Amir Hossein | Rueil Malmaison Cedex, FR | 6 | 0 |
# of filed Patents : 6 Total Citations : 0 | |||
HAROUN, Yacine | Rueil Malmaison Cedex, FR | 36 | 252 |
# of filed Patents : 36 Total Citations : 252 | |||
LEINEKUGEL, LE COCQ Damien | Rueil Malmaison Cedex, FR | 42 | 74 |
# of filed Patents : 42 Total Citations : 74 | |||
WEISS, Wilfried | Rueil Malmaison Cedex, FR | 61 | 909 |
# of filed Patents : 61 Total Citations : 909 |
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- B29B Class
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Full Text
US Patent Application No: 2024/0042,650
METHOD FOR TREATING USED PLASTICS BY DISSOLVING THE POLYMERS AND PURIFYING THEM BY WASHING
Abstract
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
Description
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