Organic compounds -- part of the class 532-570 series – Organic compounds – Sulfate esters
Patent
1994-05-18
1995-10-10
Mai, Ngoclan
Organic compounds -- part of the class 532-570 series
Organic compounds
Sulfate esters
588 3, 588 4, 588 5, 588 19, 976DIG381, 976DIG385, G21F 900
Patent
active
054572665
ABSTRACT:
A process for treating radioactive waste in the form of contaminated powdery ionic exchange resin to make it suitable for final storage by reducing its volume as much as possible, includes mechanically dewatering the ion exchange resin. The dewatered ion exchange resin is mixed with a calcium compound. The mixture is dried at temperatures of up to 120.degree. C. and preferably about 50.degree. C. to 60.degree. C., and at a pressure of from 120 to 200 hPa, until a residual moisture content of less than 10% of the mass of the mixture is reached. The dry mixture is thermally treated at a pressure below atmospheric pressure by heating up to a temperature of from at least 120.degree. C. to at most 190.degree. C. The ion exchange resin thereby loses its water absorption and swelling capability. Ion exchange resins treated in this manner are processed with cement or bitumen to form blocks that are suitable for final storage.
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Derwent Abstract AN 89-180183 of Published European Application No. 321352.
Bege Dietmar
Grigat Robert
Kleinschroth Karl-Heinz
Greenberg Laurence A.
Lerner Herbert L.
Mai Ngoclan
Siemens Aktiengesellschaft
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