METHOD OF RECOVERING COAGULANT FROM HYDROXIDE-CONTAINING WATER- TREATMENT SLUDGE

FIELD: waste water treatment. SUBSTANCE: invention relates to reagent treatment of industrial sewages followed by recovery of aluminum-containing coagulant from oil-hydroxide-containing sludge. The latter operation is effected by treatment with acidic aluminum- containing waste solution obtained fro...

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Bibliographische Detailangaben
Hauptverfasser:	POLUBENTSEVA M.F, DUGANOVA V.V, ELSHIN A.I, VORONINA V.M
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	CHEMISTRY COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS INORGANIC CHEMISTRY METALLURGY TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	FIELD: waste water treatment. SUBSTANCE: invention relates to reagent treatment of industrial sewages followed by recovery of aluminum-containing coagulant from oil-hydroxide-containing sludge. The latter operation is effected by treatment with acidic aluminum- containing waste solution obtained from water decomposition of catalyst complex used in industrial Friedel-Crafts-Gustavson process characterized by pH 0.6-1.0 and contents of free hydrochloric acid 0.94-2.20 wt.pts, aluminum chloride 0.79-1.86 wt.pts, and alkylaromatic hydrocarbons 200-500 mg/cu.dm. Secondary coagulant solution has good physico-chemical and coagulation properties. EFFECT: reduced operational expenses due to utilized waste. 2 cl