Published March 9, 1976
| Version v1
Patent
Open
Cryolite process for the solidification of radioactive wastes
Creators
Description
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
Availability note (English)
MF available from INIS under the Report Number.Files
7273862.pdf
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(149.4 kB)
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Additional details
Additional titles
- Augmented title (English)
- Patent; fluidized-bed calcination
Publishing Information
- Imprint Pagination
- 4 p.
- IPC:
- Int. Cl.G21F9/16.
- IPC
- Int. Cl.G21F9/16.
- Patent number
- US patent document 3,943,062
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 7273862
- Subject category
- S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES;
- Descriptors DEI
- ALUMINIUM FLUORIDES; CALCINATION; FLUIDIZED BEDS; LIQUID WASTES; RADIOACTIVE WASTE PROCESSING; SODIUM FLUORIDES; SOLIDIFICATION
- Descriptors DEC
- ALKALI METAL COMPOUNDS; ALUMINIUM COMPOUNDS; CHEMICAL REACTIONS; DECOMPOSITION; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; MANAGEMENT; PYROLYSIS; SODIUM COMPOUNDS; WASTE MANAGEMENT; WASTE PROCESSING; WASTES
Optional Information
- Notes
- PAT-APPL-469,736.