METHOD FOR PRODUCING ALUMINIUM CHLORIDE-CONTAINING COAGULANTS Russian patent published in 1997 - IPC

FIELD: chemical industry, production of aluminium chloride-containing coagulants. SUBSTANCE: proposed method resides in chemically dissolving aluminium metal in 5- to 10%-hydrochloric acid solution, followed by electrolysis of resulting solution with aluminium electrodes, to which voltage is applied from alternating-current supply source, at frequency 50 Hz, current density 0.5-5.0 A/sq. dm, electrolysis duration 5-30 seconds. Electrolysis product thus-obtained is mixed with natural bischofite at ratio (0.8-0.2): (0.2-0.8) to thereby produce coagulant. EFFECT: effective approach for producing good-quality coagulants. 2 cl, 2 tbl