Process for concentrating and purifying aqueous sulphuric acid solutions

Concentrated sulphuric acid aqueous solutions, stably clear through the time, are obtained starting from diluted sulphuric acid aqueous solutions containing Mg and possibly other impurities such as Fe, Al, Cr, V and Mn, by evaporation concentration. The process is characterized in that, before filte...

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Hauptverfasser: MORTIGLIENGO, MARIO, CAPPELLO, FRANCO, SCHMOLL, ERICH, KRATZ, EDUARD
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creator MORTIGLIENGO
MARIO
CAPPELLO
FRANCO
SCHMOLL
ERICH
KRATZ
EDUARD
description Concentrated sulphuric acid aqueous solutions, stably clear through the time, are obtained starting from diluted sulphuric acid aqueous solutions containing Mg and possibly other impurities such as Fe, Al, Cr, V and Mn, by evaporation concentration. The process is characterized in that, before filtering, the slurry obtained by evaporation concentration, is cooled down to 10 DEG -25 DEG C. and maintained at this temperature for not less than 12 hours.
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subjects CHEMISTRY
COMPOUNDS THEREOF
GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
TECHNICAL SUBJECTS COVERED BY FORMER USPC
TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS
title Process for concentrating and purifying aqueous sulphuric acid solutions
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