Published May 31, 1984 | Version v1
Patent Open

Purifying phosphogypsum

Creators

Description

Phosphogypsum containing radioactive material is calcined to form hemihydrate crystals carrying the radioactive contaminants, and a portion of the crystals is converted to coarse substantially radiation-free gypsum crystals which are readily separated from the finer hemihydrate crystal relics containing substantially all of the radioactive contamination. (author)

Availability note (English)

MF available from INIS under the Report Number.

Files

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Additional details

Publishing Information

Imprint Pagination
5 p.
IPC:
Int. Cl. G21f9/30; C01f11/46.
IPC
Int. Cl. G21f9/30; C01f11/46.
Patent number
GB patent document 2130429/A/

INIS

Country of Publication
United Kingdom
Country of Input or Organization
United Kingdom
INIS RN
16003422
Subject category
S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES;
Descriptors DEI
CALCINED WASTES; CONTAMINATION; CRYSTALS; GYPSUM; HYDRATES; IMPURITIES; PHOSPHORIC ACID; PRODUCTION; PURIFICATION; RADIOACTIVE WASTE PROCESSING; RADIOACTIVE WASTES; SEPARATION PROCESSES
Descriptors DEC
HYDROGEN COMPOUNDS; INORGANIC ACIDS; MANAGEMENT; MATERIALS; MINERALS; OXYGEN COMPOUNDS; PHOSPHORUS COMPOUNDS; RADIOACTIVE MATERIALS; SULFATE MINERALS; WASTE MANAGEMENT; WASTE PROCESSING; WASTES

Optional Information

Secondary number(s)
US priority 427377.