BASIC ALUMINUM CHLORIDE AND ITS PRODUCTION

BASIC ALUMINUM CHLORIDE AND ITS PRODUCTION

PROBLEM TO BE SOLVED: To obtain basic aluminum chloride, which is useful as a flocculating agent for water treatment, exhibits a flocculating performance in a wide pH range and is capable of reducing residual aluminum in treated clean water, and to provide a producing method for the basic aluminum c...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: HARAGUCHI TADASHI, KAKIO TOSHIHIKO
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS
INORGANIC CHEMISTRY
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To obtain basic aluminum chloride, which is useful as a flocculating agent for water treatment, exhibits a flocculating performance in a wide pH range and is capable of reducing residual aluminum in treated clean water, and to provide a producing method for the basic aluminum chloride. SOLUTION: This basic aluminum chloride is 0.04 to 1.80 in the molar ratio of M/Al (M is alkali metal or alkali earth metal), 0.50 to 1.95 in the molar ratio of Cl/Al and 65 to 83% of basicity. When this basic aluminum chloride is added to 500ml distilled water (20±2 deg.C) at 10ppm in terms of Al2 O3 , followed by adjusting the solution to pH7.8 to 8.2 using 5wt.% sodium bicarbonate (NaHCO3 ) solution, stirring it at 50rpm for 30 minutes and standing it still for 30 minutes, the amount of the residual aluminum(Al) in the filter after the above solution is passed through No.5 filter paper satisfies the following relationship: Y