METHOD OF DECOMPOSING MONAZITE

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FIELD : chemistry.SUBSTANCE : invention pertains to the technology of rare and radioactive elements; solves the problem of decomposing monazite. The method of decomposing monazite involves its treatment in molten salts at temperature ranging from 400°C to 900°C and phosphorous removal. The salts used during treatment are nitrates of alkaline metals (MeNO3), and phosphorous removal is done by separation of the clear phase of the smelt and/or lightening the phosphate of alkaline metal (Na or K) in a water solution.EFFECT : low treatment temperature and provision for separation of phosphorous as a commercial product.5 cl, 1 tbl, 6 ex