PRODUCTION OF ALUMINUM SULFATE

PROBLEM TO BE SOLVED: To produce aluminum sulfate while reducing the water content of amorphous aluminum hydroxide sludge without changing its properties. SOLUTION: In this production, amorphous aluminum hydroxide is finely pulverized, and thereafter, the pulverized aluminum hydroxide is dispersed i...

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Bibliographische Detailangaben
1. Verfasser:	ITO SHIGETAKA
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS FERROUS OR NON-FERROUS ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INORGANIC CHEMISTRY METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To produce aluminum sulfate while reducing the water content of amorphous aluminum hydroxide sludge without changing its properties. SOLUTION: In this production, amorphous aluminum hydroxide is finely pulverized, and thereafter, the pulverized aluminum hydroxide is dispersed into a hot air stream to instantaneously evaporate water in the pulverized aluminum hydroxide. At this time, the temp. rise of the aluminum hydroxide is controlled so as to be within the range of 40 to 100 deg.C to reduce its water content to the same level as that of crystalline aluminum hydroxide while retaining the pulverized aluminum hydroxide in the amorphous state. Then, the fine-powdery dry amorphous aluminum hydroxide is allowed to react with sulfuric acid of an amount smaller than its neutralization equivalent to the amount of aluminum component in the amorphous aluminum hydroxide, to produce the objective aluminum sulfate.