METHOD OF FIRE-EXTINGUISHING POWDER PRODUCING Russian patent published in 1997 - IPC

FIELD: fire-extinguishing materials. SUBSTANCE: mixture of wet-process phosphoric acid and sulfuric acid taken at ratio = (1.6-5.9):1 is neutralized with ammonia and a mixture of organosilicon liquid and sodium silicate taken at ratio = 1:(1-1.85) of sodium silicated added at the range 4-12 wt-% of salt solution dry matter is added to the salt solution. Precipitate is dried in the heated heat-carrier flow, powder is ground and mixed with the dispersed additions. EFFECT: improved method of producing. 2 cl, 1 tbl