Method of preparing sodalite from chloride salt occluded zeolite

Details Method of preparing sodalite from chloride salt occluded zeolite Method of preparing sodalite from chloride salt occluded zeolite

1995-01-19

1997-03-18

Mai, Ngoclan

Hazardous or toxic waste destruction or containment

Destruction or containment of radioactive waste

By fixation in stable solid media

588 12, 588 14, 976DIG385, G21F 900

Patent

active

056132409

ABSTRACT:
A method for immobilizing waste chloride salts containing radionuclides and hazardous nuclear material for permanent disposal starting with a substantially dry zeolite and sufficient glass to form leach resistant sodalite with occluded radionuclides and hazardous nuclear material. The zeolite and glass are heated to a temperature up to about 1000.degree. K. to convert the zeolite to sodalite and thereafter maintained at a pressure and temperature sufficient to form a sodalite product near theoretical density. Pressure is used on the formed sodalite to produce the required density.

REFERENCES:
patent: 3262885 (1966-07-01), Rushbrook
patent: 4172807 (1979-10-01), Larker
patent: 4376792 (1983-03-01), Angelini et al.
Plodinec, M. J., Improved Glass Compositions For Immobilization of SRP Waste, Proceedings of the International Symposium on the Scientific Basis for Nuclear Waste Management, Nov. 27-30, 1979, pp. 223-229.

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