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Primary Examiner: Sebastian, Leland A.
Assistant Examiner: Kyle, Deborah L.
Attorney: Carlson; Dean E., Churm; Arthur A., Fisher; Robert J.

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Title: Cryolite process for the solidification of radioactive wastes

Abstract: An improved method is provided for solidifying liquid wastes containing significant quantities of sodium or sodium compounds by calcining in a fluidized-bed calciner. The formation of sodium nitrate which will cause agglomeration of the fluidized-bed particles is retarded by adding aluminum and a fluoride to the waste in order to produce cryolite during calcination. The off-gas of the calciner is scrubbed with a solution containing aluminum in order to complex any fluoride which may be liberated by subsequent dissolution of cryolite and prevent corrosion in the off-gas cleanup system.

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Inventors: Wielang, Joseph A. (Idaho Falls, ID, US)
Taylor, Larry L. (Fort Belvoir, VA, US)

Application Number: 469736
Filing Date: 1974-05-13
Publication_date: 1976-03-09
Assignee: The United States of America as represented by the United States Energy (Washington, DC)
Primary Class(es): 588/19 976/DIG385
Other Classes:
US Patent Ref:
Other Refs: 837,967

Jun, 1960	UK

Other References: ICP-1008 Newby, B. J. et al., "DTA-X-Ray Diffraction Examination . . . Potassium Nitrates".