Compositions – Etching or brightening compositions
Patent
1992-04-02
1993-11-02
Straub, Gary P.
Compositions
Etching or brightening compositions
252 793, 588254, 588901, 4231671, 423335, 423659, A63D 300, C09K 1300, C09K 1308, C01F 100
Patent
active
052581314
ABSTRACT:
Treatment solutions for removing asbestos containing materials from substrates and for converting asbestos-containing materials to a non-asbestos material, which comprises an aqueous solution containing about 1 to 25% by weight of an acid and 1 to 10% by weight of a source of fluoride ions, such as ammonium fluoride. The acid solution hydrolyses the magnesium oxide units in asbestos while the fluoride ions attack the interleaved silica layers in the crystal structure of asbestos, thereby destroying the fibrous nature of the asbestos.
REFERENCES:
patent: 112650 (1871-03-01), Stevens
patent: 1094505 (1914-04-01), Whitney
patent: 3297516 (1967-01-01), Naumann et al.
patent: 3551228 (1970-12-01), Meth
patent: 3867218 (1975-02-01), Henry
patent: 3965284 (1976-06-01), Xanthos et al.
patent: 4055458 (1977-10-01), Niederprum
patent: 4181623 (1980-01-01), Dillarstone et al.
patent: 4347150 (1982-08-01), Arpin
patent: 4376673 (1983-03-01), Cheung
patent: 4395304 (1983-07-01), Kern et al.
patent: 4401636 (1983-08-01), Flowers
patent: 4474742 (1984-10-01), Graceffa et al.
patent: 4555304 (1985-11-01), Salzle
patent: 4582624 (1986-04-01), Enjo et al.
patent: 4693755 (1987-09-01), Erzinger
patent: 4812204 (1989-03-01), Delvaux et al.
patent: 4921572 (1990-05-01), Roche
patent: 5041277 (1991-08-01), Mirick
patent: 5091053 (1992-02-01), Blonder et al.
"An environmentally acceptable treatment method for chrysotile asbestos wastes", G. Baldwin et al., Chemical Abstracts, vol. 109, No. 20, Nov. 14, 1988, p. 335.
"The destruction of chrysotile asbestos using waste acids", L. Heasman et al., Chemical Abstracts, vol. 105, No. 6 Aug. 11, 1986.
Ullman's Encyclopedia of Industrial Cheistry, 5th Edition, VCH Verlagsgesellschaft mbH, Weinehim, 1985, pp. 151-167.
"Asbestos", vol. 1, Michaels & Chissick (1979), pp. 82-86.
Forrister Walter B.
Mirick William
Austen-Chase Industries Inc.
Straub Gary P.
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