Process for the extraction of oil or polychlorinated biphenyl fr

Details Process for the extraction of oil or polychlorinated biphenyl fr Process for the extraction of oil or polychlorinated biphenyl fr

1988-05-04

1989-11-07

Manoharan, Virginia

Distillation: processes, separatory

Filming of distilland for vaporization

134 11, 134 12, 134 21, 134 31, 134105, 134109, 159 481, 159 49, 159901, 159DIG16, 202170, 202205, 202236, 203 90, 203 94, 203 98, 2082621, 2082625, 210909, B01D 122, B01D 310, B01D 1100

Patent

active

048790044

ABSTRACT:
In order to dissolve oil or PCB which exists in the electrical insulation of parts to be cleaned, a solvent is evaporated during a heating phase by an evaporator located with the parts in an autoclave. The solvent vapor condenses on the parts and penetrates into the electrical insulation to form an oil or PCB-solvent mixture. In the heating phase, a plurality of intermediate pressure reductions are carried out in the autoclave, and during each intermediate pressure reduction the solvent is simultaneously distilled out of the oil or PCB-solvent mixture, directly from the autoclave. That is, during each of the pressure reductions, the solvent supply is discontinued and the mixture circulated through a circulating line. Following the completion of each intermediate pressure reduction, the pure oil or PCB present in a condensate vessel is pumped out by an intermediately located feed pump through a connecting line and into a reservoir.

REFERENCES:
patent: 2669531 (1954-02-01), Petkus
patent: 3070463 (1962-12-01), Barday
patent: 3329528 (1967-07-01), Aldrich et al.
patent: 4292744 (1981-10-01), Nabholz
patent: 4424633 (1984-01-01), Bernhardt et al.
patent: 4425949 (1984-01-01), Rowe, Jr.
patent: 4430208 (1984-02-01), Pytlewski et al.
patent: 4483717 (1984-11-01), Olmsted et al.
patent: 4685972 (1987-08-01), Fowler
patent: 4699667 (1987-10-01), Walsh
patent: 4764256 (1988-08-01), Way

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