Enhanced volatilization of polychlorinated biphenyl compounds

Details Enhanced volatilization of polychlorinated biphenyl compounds Enhanced volatilization of polychlorinated biphenyl compounds

1994-09-08

1996-02-06

Suchfield, George A.

Hazardous or toxic waste destruction or containment

Containment

405128, 588209, A62D 300, B09C 106, B09C 108

Patent

active

054897386

ABSTRACT:
This invention provides a method or process for separating an organic chlorinated contaminant such as polychlorobiphenyl from an inert porous material which comprises admixing the material with an effective amount of a volatilizable organic liquid in which the contaminant is soluble, heating the admixture under vacuum to a temperature above the boiling point of the organic liquid but below the decomposition temperature of the organic liquid and the contaminant, while maintaining a flow of an inert sweep gas through the porous material, and collecting the vapors for further treatment which includes recovery of the organic liquid for reuse in the decontamination of soil and other porous materials. Recovery of the organic liquid is achieved by passing the vapors from the separation step through a bed of activated carbon at a temperature above the vaporization temperature of the organic liquid. The carbon selectively adsorbs and holds the contaminant while the organic liquid in vapor form passes through and is recovered by condensation and recirculated to enhance decontamination of additional material.

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patent: 5414203 (1995-05-01), Fox
patent: 5416248 (1995-05-01), Matsumoto et al.
patent: 5430232 (1995-07-01), El-Shoubary et al.

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