VERFAHREN ZUR DEKONTAMINIERUNG HEXAVALENTES CHROM ENTHALTENDER FEUERFESTMATERIALIEN

The invention relates to a method for decontaminating a material containing hexavalent chrome using a liquid. According to said method, the material is lixiviated in order to form a liquid phase and a solid phase. The invention is characterized in that lixivation occurs in an acid medium in the pres...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	AUVRAY, JEAN-MICHEL, DESCAMP, PHILIPPE, LUCION, THIERRY, TIRLOCQ, JACQUES
Format:	Patent
Sprache:	ger
Schlagworte:	CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING ORPROTECTING AGAINST HARMFUL CHEMICAL AGENTS CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F FERROUS OR NON-FERROUS ALLOYS FIRE-FIGHTING HUMAN NECESSITIES INORGANIC CHEMISTRY LIFE-SAVING METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	The invention relates to a method for decontaminating a material containing hexavalent chrome using a liquid. According to said method, the material is lixiviated in order to form a liquid phase and a solid phase. The invention is characterized in that lixivation occurs in an acid medium in the presence of a reducing agent such that the hexavelent chrome is transformed into trivalent chrome in a solution and such that the pH is increased in order to form chrome hydroxide in a solid state.