Hazardous or toxic waste destruction or containment – Containment
Patent
1992-10-05
1993-11-23
Straub, Gary P.
Hazardous or toxic waste destruction or containment
Containment
588254, 588901, 4231671, 423341, 252 793, A62D 300, A61L 1100, B09B 300
Patent
active
052646556
ABSTRACT:
A method for rendering asbestos in an asbestos-containing material harmless comprises wetting the material with an aqueous solution containing about 1 to 25% by weight of an organic acid, such as trifluoroacetic acid and at least 1% by weight of a source of fluoride ions, such as ammonium fluoride The acid 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. Wetting with the solutions also facilitates the removal of asbestos-containing material from the substrate on which it is installed.
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Forrister Walter B.
Mirick William
Austen-Chase Industries Inc.
Straub Gary P.
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