METHOD OF PREPARING SILICA GEL-BASED GAS DRIER Russian patent published in 2006 - IPC B01D53/28 B01J20/10 B01J20/32 

FIELD: gas-treatment materials.

SUBSTANCE: invention relates to sorption engineering, particularly to process gas drying processes and to individual and collective respiratory apparatus protection systems. Proposed method comprises impregnation of silica gel with aqueous solution containing 380 g/L calcium chloride and 480 g/L lithium bromide at solution temperature 10-20°C and ratio of silica gel pore volume to solution volume 1:(0.9-1.0); stirring for 15-20 min; drying at 300-450°C for 0.8 h; screening and recovery of fraction with granule diameter 1.0-3.0 mm.

EFFECT: increased strength and workability of drier.

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