Chlorocarbon and halogen recovery from vent gas stream

Details Chlorocarbon and halogen recovery from vent gas stream Chlorocarbon and halogen recovery from vent gas stream

1981-02-09

1983-02-15

Yudkoff, Norman

Refrigeration

Processes

Circulating external gas

62 23, 570262, F25J 300

Patent

active

043739423

ABSTRACT:
Apparatus for recovering chlorocarbons from a vent gas stream which additionally contains a halogen, including an inlet means connected to a source of the gas stream and a heat exchanger means for receiving the stream from the inlet means. The heat exchange means has a cooling capacity sufficient to reduce the temperature of the stream to less than about -60.degree. F. at a pressure of at least 60 psig. Finally, separator means are provided for receiving the stream at the reduced temperature and include means for separating the liquid from the vapor at that point.
The apparatus and the method of using the same is particularly suited for use with vent gas streams containing at least 1000 ppm of carbon tetrachloride and approximately 0.2 to 20% of a halogen, particularly chlorine, based upon the weight of the carbon tetrachloride. Preferred operating conditions are from about -60.degree. F. to about -70.degree. F. at a pressure ranging from 80 to 90 psig.

REFERENCES:
patent: 4010017 (1977-03-01), Loyless
patent: 4128409 (1978-12-01), Bennett
patent: 4133663 (1979-01-01), Skinner

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