Process for recycling contaminated solid materials and purification of gases
OwnerSherif Farag, Mai Attiainventors
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Abstract
A process for recycling contaminated solid material is provided. The process comprises heating the material yielding a solid phase, an oil phase, and a gas phase. Prior to being heated, the material is subjected to a pre-treatment involving a dehalogenation agent (DHA). The gas phase obtained is further subjected to a purification treatment. The DHA agent used is regenerated using a regeneration agent (RGA) and further re-used in the process.
Claims11
A process for recycling contaminated plastic material, comprising heating the material yielding a solid phase, an oil phase, and a gas phase, wherein:
- the plastic material is subjected to a pre-treatment involving an emulsion containing organophosphorus compound (ECOC) at a temperature of about 25° C. to about 60° C. for a time period of up to 6 hours, thereby removing chemicals of concern (CoCs) and dehalogenating halogenated compounds, to obtain the pre-treated plastic material which is substantially free of CoCs and halogenated compounds;
- and
- the heating is performed using microwave-pyrolysis, and a chemically inert microwave absorber which is SiC is added to the pre-treated plastic material, thereby thermally decomposing the plastic.
A process for recycling a contaminated plastic material, comprising the steps of:
- (a) subjecting the material to a pre-treatment involving an emulsion containing organophosphorus compound (ECOC) to yield a pre-treated plastic material;
- (b) subjecting the pre-treated plastic material to a heating process to yield a solid phase, an oil phase, and a gas phase;
- (c) separating the solid phase, the oil phase, and the gas phase;
- (d) subjecting the gas phase to a purification treatment involving a further ECOC to yield a purified gas and a reacted ECOC;
- (e) separating the purified gas and the reacted ECOC;
- (f) subjecting the reacted ECOC DHA to a regeneration process to yield a regenerated ECOC;
- and
- (g) directing the regenerated ECOC for use at steps (a) and/or step (d),
- wherein step (a) is performed at a temperature of about 25° C. to about 60° C. for a time period of up to 6 hours, thereby removing chemicals of concern (CoCs) and dehalogenating halogenated compounds, to obtain the pre-treated plastic material which is substantially free of CoCs and halogenated compounds;
- and wherein the heating is performed using microwave-pyrolysis, and a chemically inert microwave absorber which is SiC is added to the pre-treated plastic material, thereby thermally decomposing the plastic.
Dependencies are inferred from the claim text.