Hydrothermal treatment and partial oxidation of plastic...

C - Chemistry – Metallurgy – 01 – B

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C01B 3/32 (2006.01) C08J 11/00 (2006.01) C10G 1/00 (2006.01) C10J 3/46 (2006.01)

Patent

CA 2173246

A process for upgrading plastic material containing inorganic filler or reinforcement material for use as feedstock in a partial oxidation gas generator for the production of raw synthesis gas, fuel gas, or reducing gas. The plastic material is granulated and mixed with water to produce the plastic sludge. The plastic sludge is preheated at a temperature of about 350 °F to 475 °F in the absence of air in a closed system. The preheated plastic sludge is then hydrothermally treated at a temperature of about 450 °F to 650 °F and at a pressure above the vapor pressure of water at that temperature. The hydrothermally treated plastic sludge is cooled, degassed, and mixed with carbonaceous fuel, to produce a slurry. The slurry is then reacted by partial oxidation to produce said synthesis gas, fuel gas, or reducing gas.

Procédé de valorisation de plastiques, comportant des charges non organiques ou des matériaux de renfort, qu'on utilise comme matière première alimentant un générateur de gaz à oxydation partielle en vue de la production de gaz brut de synthèse, de gaz combustible ou de gaz réducteur. Les plastiques sont broyés puis mélangés à de l'eau pour produire une solution épaisse qui est préchauffée en l'absence d'air puis traitée hydrothermiquement à une température comprise entre 450 et 650 ~F et à une pression dépassant la pression de vapeur à cette température. La suspension ainsi traitée est refroidie, dégraissée et mélangée à un combustible carboné pour produire une boue, laquelle subit une oxydation partielle d'où résultent les susdits gaz brut de synthèse, gaz combustible ou gaz réducteur.

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