IMMOBLISIERUNG METALLISCHER VERUNREINIGUNGEN VON EINEM FLÜSSIGEN IN EIN FESTES MEDIUM

PCT No. PCT/GB92/02086 Sec. 371 Date May 4, 1994 Sec. 102(e) Date May 4, 1994 PCT Filed Nov. 11, 1992 PCT Pub. No. WO93/09849 PCT Pub. Date May 27, 1994.A method for the immobilization of heavy metal contaminant from a liquid medium containing sulfuric acid and one or more acids of phosphorus, for e...

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Main Authors JAMES, MICHAEL, LESLIE 2 JUNIPER GROVE, CUMBRIA CA28 6SL, GB, ROSE, MARK, ANTHONY SPRINGFIELD BRIDEKIRK, CUMBRIA CA13 0DE, GB
Format Patent
LanguageGerman
Published 10.07.1997
Edition6
Subjects
CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING ORPROTECTING AGAINST HARMFUL CHEMICAL AGENTS
CHEMISTRY
COMPOUNDS THEREOF
FIRE-FIGHTING
HUMAN NECESSITIES
INORGANIC CHEMISTRY
LIFE-SAVING
METALLURGY
NON-METALLIC ELEMENTS
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Summary:PCT No. PCT/GB92/02086 Sec. 371 Date May 4, 1994 Sec. 102(e) Date May 4, 1994 PCT Filed Nov. 11, 1992 PCT Pub. No. WO93/09849 PCT Pub. Date May 27, 1994.A method for the immobilization of heavy metal contaminant from a liquid medium containing sulfuric acid and one or more acids of phosphorus, for example in the treatment of acid raffinates generated during the purification of phosphoric acid. The method includes the steps of (i) neutralizing the liquid medium with a stoichiometric excess of an alkaline earth metal oxide to form agglomerates, and (ii) treating the agglomerates with water to form a solid cementitious material wherein the heavy metal contaminants are substantially chemically isolated.
Bibliography:Application Number: DE19926017985T