Method for removing chemical contaminants from material and appa

Details Method for removing chemical contaminants from material and appa Method for removing chemical contaminants from material and appa

1993-06-11

1995-08-08

Dawson, Robert A.

Liquid purification or separation

Processes

Separating

210776, 210799, 210781, 210800, 2102421, 2102423, 210DIG5, 2101951, 2102571, 210521, 134 251, 134 65, B01D 6700

Patent

active

054395976

ABSTRACT:
A method for removing petroleum contaminants from larger-size and smaller-size petroleum-bearing earth-like materials using a movable apparatus. The method includes the steps of loading larger-size and smaller-size petroleum-bearing earth-like materials onto the movable apparatus, screening larger-size petroleum-bearing earth-like material from smaller-size petroleum-bearing earth-like material, spraying larger-size petroleum-bearing earth-like materials with an aqueous cleansing solution having a biodegradable emulsifier therein to remove petroleum contaminants therefrom and to substantially cleanse the larger-size earth-like material and discharging substantially cleansed larger-size earth-like material from the movable apparatus, mixing an aqueous cleansing solution having a biodegradable emulsifier therein with smaller-size petroleum-bearing earth-like material to form a slurry, agitating the slurry, washing smaller-size petroleum-bearing earth-like material remaining in the slurry to remove petroleum contaminants therefrom and to substantially cleanse said smaller-size earth-like material, removing substantially cleansed smaller-size earth-like material from aqueous cleansing solution and petroleum contaminants in the slurry, dewatering substantially cleansed smaller-size earth-like material, discharging substantially cleansed smaller-size earth-like material from the movable apparatus, removing petroleum contaminants from aqueous cleansing solution and discharging petroleum contaminants from the movable apparatus.

REFERENCES:
patent: 4400274 (1983-08-01), Protos
patent: 4836302 (1989-06-01), Heilhecker et al.
patent: 5015393 (1991-05-01), Russell et al.
patent: 5047149 (1991-10-01), Vion
patent: 5080721 (1992-01-01), Flanigan et al.
patent: 5160605 (1992-11-01), Noestheden
patent: 5199997 (1993-04-01), Stowe
patent: 5252138 (1993-10-01), Guymon
Unique Products, Inc., "Oil Contamination Cleanup", Jan. 30, 1992.

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