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Corrosion inhibiting composition for treating asbestos containing materials

United States Patent

5,741,358
April 21, 1998
View the Complete Patent at the US Patent & Trademark Office
Brookhaven National Laboratory - Visit the Office of Technology Commercialization and Partnerships Website
A composition for transforming a chrysotile asbestos-containing material into a non-asbestos material is disclosed, wherein the composition comprises water, at least about 30% by weight of an acid component, optionally a source of fluoride ions, and a corrosion inhibiting amount of thiourea, a lower alkylthiourea, a C.sub.8 -C.sub.15 alkylpyridinium halide or mixtures thereof. A method of transforming an asbestos-containing building material, while part of a building structure, into a non-asbestos material by using the present composition also is disclosed.
Hartman; Judithann Ruth (Columbia, MD)
W. R. Grace & Co.-Conn. (New York, NY)
08/ 721,853
September 27, 1996
This invention was made with Government support under contract DE-AC02-76CH00016 awarded by the Department of Energy. The Government has certain rights to this invention.