PROPANE EXTRACTION TREATS REFINERY WASTES TO BDAT STANDARDS

Richard de Filippi, John Markiewicz CF Systems Woburn, Mass. The first commercial solvent-extraction unit for treatment of refinery hazardous wastes has been operating successfully since Mar. 17. The full-scale unit is continuously treating hazardous-waste sludges to meet U.S. Environmental Protection Agency (EPA) specifications for land-disposable wastes at a major Gulf Coast refinery at Port Arthur, Tex. (Fig. 1). The unit, based on solvent extraction, uses liquid propane as the solvent. The

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