Cleaning and liquid contact with solids – Processes – Hollow work – internal surface treatment
Patent
1990-04-30
1991-02-26
Miller, Edward A.
Cleaning and liquid contact with solids
Processes
Hollow work, internal surface treatment
134 221, 134 2219, 252626, B08B 900
Patent
active
049959166
ABSTRACT:
The invention is a process for the recovery of hazardous wastes such as heavy metals and radioactive elements from phenolic resin filter by a circulating a solution of 8 to 16 molar nitric acid at a temperature of 110 to 190 degrees F. through the filter. The hot solution dissolves the filter material and releases the hazardous material so that it can be recovered or treated for long term storage in an environmentally safe manner.
REFERENCES:
patent: 3089167 (1963-05-01), Jahn et al.
patent: 4061480 (1977-12-01), Frye et al.
Bourne Gary L.
Burdge Bradley G.
McConnell, Jr. John W.
McFee John N.
Meikrantz David H.
Anderson Thomas G.
Mai Ngoclan
Miller Edward A.
Moser William R.
The United States of America as represented by the United States
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