Other

Arkema France

Pyrovac

Daniel Blanchette

Jean-Luc Dubois

Bruno De Caumia

Christian Roy

A process for treating a gaseous effluent obtained from a pyrolytic decomposition of one or more polymers, including: a condensation step, in a condensation chamber maintained at a first pressure, of a gaseous effluent placed in contact with an absorbent liquid, the temperature of the absorbent liquid being below the temperature of the gaseous effluent, a step of partial vaporization, by expansion of the condensate in a chamber maintained at a second pressure below the first pressure, a reinjection step which includes at least partly redirecting a first liquid or vapor fraction, obtained on conclusion of the partial vaporization step, to the condensation chamber, and a recovery step including purification of a second liquid or vapor fraction, obtained on conclusion of the partial vaporization step and charged with monomer(s).

Process for treating a gaseous effluent from pyrolytic decomposition of a polymer

In the water purification process, apparatus, and method, contaminated water vapor is exposed to liquid solvent, which causes a transfer of contaminants from the contaminated water vapor to the liquid solvent. In an advantageous embodiment, this latter step is followed by a second purification step where the decontaminated water in liquid phase is exposed to water vapor which causes a transfer of solvent remaining in the decontaminated water to the water vapor. The energy freed during the condensation of the vapor can advantageously be used for evaporation of the liquids, optionally by compressing the vapors prior to condensation thereof within heat exchangers.

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Lévis, Canada

Daniel Blanchette