Process for removing volatile contaminants from granular materia

Details Process for removing volatile contaminants from granular materia Process for removing volatile contaminants from granular materia

1991-10-01

1993-10-26

Morris, Theodore

Cleaning and liquid contact with solids

Processes

Work handled in bulk or groups

134 10, 134 19, 134 26, 134 30, 134 31, 405128, B08B 300

Patent

active

052562085

ABSTRACT:
Volatile organic compounds and other volatile contaminants are removed from soils and granular solids by contacting the soil with steam at superatmospheric pressure and thereafter rapidly reducing the pressure by flashing off steam and vaporized contaminants leaving a cleaned soil product. The steam fraction containing the contaminant compounds is condensed and the contaminants can then be separated from the water for recovery or disposal.

REFERENCES:
patent: 4818297 (1989-04-01), Holzmuler et al.
patent: 4892664 (1990-01-01), Miller
patent: 4974528 (1990-12-01), Barcell
patent: 5094012 (1992-03-01), Rosenstock et al.
Alperin et al., "Batch steam distillation/metal extraction treatment process" paper No. 91-22.6; Air and Waste Management Assoc., Jun., 1991.
U.S. EPA, "The Superfund Innovative Technology Evaluation Program", EPA/540/5-89/013, Nov., 1989, p. 109.
Sims, R. C., "Soil Remediation Technniques at Uncontrolled Hazardous Waste Sites", J. Air Waste Manage Assoc., vol. 40, No. 5, May, 1990, pp. 704-732.

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