METHOD FOR LOW-TEMPERATURE IMMOBILISATION OF LIQUID RADIOACTIVE WASTES USING HYDROLYSATES OF ALKYL SILICATES AND CEMENT Russian patent published in 2011 - IPC G21F9/16 

FIELD: chemistry.

SUBSTANCE: method for low-temperature immobilisation of liquid radioactive wastes (LRW) involves converting LRW components into a solid glass-like phase via treatment thereof with chloride water-alcohol solutions of silicon- and boron-containing compounds and then holding the reaction mixture at temperature 5-60°C in a sol-gel process. Powdered cement is added to products of chloride water-alcohol hydrolysis of LRW and alkyl silicates. The reaction mixture is stirred until a solid gel-like matrix forms.

EFFECT: shorter duration of the hydrolysis step followed by formation of a self-packing glass-like solid mass.

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