METHOD OF PREPARING ALUMINIUM CHLORIDE-CONTAINING COAGULATOR (VERSIONS) Russian patent published in 1997 - IPC

FIELD: electrolytic processes. SUBSTANCE: method is distinguished with that electrolysis process is carried out on aluminium electrodes at direct current density 0.82-4.1 a/sq.dm for 2-30 h in mixture of natural bischofite and 5-10% hydrochloric acid solution at their volume ratio (1-0.001): (0.001-1), or by way of preliminarily dissolving metal aluminium in the same hydrochloric acid solution followed by combining with natural bischofite at volume ratio (0.9-1):(0.1-0.9), or by way of preliminarily dissolving aluminium in 5-10% HCl-natural bischofite mixture with volume ratio (0.9-0.1): (0.1-0.9). EFFECT: improved procedure. 3 cl, 13 ex