Hazardous or toxic waste destruction or containment – Containment
Patent
1992-04-02
1993-11-02
Straub, Gary P.
Hazardous or toxic waste destruction or containment
Containment
588254, 588901, 4231671, 423335, 423659, A62D 300, A61L 1100, B09B 300
Patent
active
052585620
ABSTRACT:
A method for treating asbestos-containing material for removing such material from a substrate where it is installed and for destroying the asbestos in such asbestos-containing material, comprising wetting the material with an aqueous solution containing about 1 to 25% by weight of a weak organic acid, such as trifluoroacetic acid. Optionally, the aqueous solution further comprises about 1 to 10% by weight of a source of fluoride ions, such as ammonium fluoride. The weak acid solution assists in the removal of the asbestos-containing material and 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.
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Forrister Walter B.
Mirick William
Austen-Chase Industries Inc.
Straub Gary P.
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