Conversion of Hazardous Chromium Plating Sludge Into Aluminothermic Chromium Metal

EPA Contract Number: 68D50098
Title: Conversion of Hazardous Chromium Plating Sludge Into Aluminothermic Chromium Metal
Investigators: Whelan, Edward P.
Small Business: Climax Research Services
EPA Contact: Manager, SBIR Program
Phase: I
Project Period: September 1, 1995 through March 1, 1996
Project Amount: $65,000
RFA: Small Business Innovation Research (SBIR) - Phase I (1996) RFA Text |  Recipients Lists
Research Category: Hazardous Waste/Remediation , SBIR - Waste , Small Business Innovation Research (SBIR)


Chromium plating sludge waste from hard and decorative chromium plating operations is classified as a hazardous waste and its disposal is a major environmental concern. Climax Research Services (CRS) will develop techniques to recycle the chromium metal values in the sludge back into the domestic metallurgical industry as purified aluminothermic chromium metal. This proposal addresses initially the hydrometallurgical treatment of chromium plating sludge to remove unacceptable impurity elements. Using fractional crystallization of chromium sulfate followed by calcination, a purified chromic oxide will be produced from the sludge. Pre-proposal work by CRS has demonstrated the technical validity of this approach. The chromic oxide will then be transformed by aluminothermic reaction into commercially-viable pure aluminothermic chromium metal, using procedures developed in a previous EPA research contract. Aluminothermic chromium metal sales will be directed at the national non-ferrous foundry industry. This transformation of an environmentally harmful, hazardous, sludge into an environmentally acceptable industrial product is technically feasible and commercially attractive. It responds directly to EPA concerns for hazardous waste disposal.

Supplemental Keywords:

small business, SBIR, engineering, chemistry., RFA, Scientific Discipline, Waste, Sustainable Industry/Business, cleaner production/pollution prevention, Environmental Chemistry, Analytical Chemistry, Hazardous Waste, Chemistry and Materials Science, Hazardous, Environmental Engineering, hazardous substance disposal, hazardous waste disposal, hazardous liquid waste, hazardous waste recycling, industrial waste, waste minimization, waste reduction, aluminothermic chromium metal, non-ferrous foundry industry, conversion of chromium plating sludge, chromic oxide, electroplating, metal recovery , engineering, hazardous sludge, innovative technology, hazardous chemicals, chromium plating sludge, pollution prevention, sludge, chromium recycling, hydrometallurgical treatment

Progress and Final Reports:

  • Final