Process for the decontamination of soils, sediments, and sludges

Details Process for the decontamination of soils, sediments, and sludges Process for the decontamination of soils, sediments, and sludges

1990-07-03

1992-09-22

Dawson, Robert A.

Liquid purification or separation

Processes

Chemical treatment

210758, 210765, 210766, 210805, 210908, 210909, 210925, 134 50, 423DIG20, 405128, 405263, 405264, 2082625, B09B 300

Patent

active

051494442

ABSTRACT:
A method for the decontamination of a soil, sediment, or sludge containing toxic halogenated organic compound and containing water comprising the steps of mixing said soil, sediment, or sludge with a reagent capable of reacting with said halogenated compound and heating said mixture of soil, sediment, or sludge, and reagent in a reaction zone to an elevated temperature thereby forming a reaction zone vapor stream containing at least a portion of the water contained in said soil, sediment, or sludge and unreacted halogenated organic compound; condensing a portion of said reaction zone vapor stream under conditions suitable for the formation of a condensate stream containing substantially all of the halogenated organic compound in said reaction zone vapor stream, and a vapor stream containing water and trace amounts of said halogenated organic compound; recycling said condensate to said reaction zone; treating said vapor stream to remove trace halogenated organic compound and venting the so-treated stream to the atmosphere; and removing soil, sediment, or sludge containing less contaminant from said reaction zone.

REFERENCES:
patent: 4574013 (1986-03-01), Peterson
patent: 4844807 (1989-07-01), Manchak, Jr.
patent: 4864942 (1989-09-01), Fochtman et al.

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