Process for decontamination of hardening salt residue

Decontamination of hardening salt residues is accomplished by treating the large pieces broken and slurried in water with an iron-II-chloride solution equivalent to the cyanide portion at a pH of 7-14, in the presence of at least the equivalent amount of alkali carbonate corresponding to the alkalin...

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Bibliographische Detailangaben
Hauptverfasser:	REINHARDT, HELMUT, TREBINGER, KARL, KALLRATH, GOTTFRIED, WEBER
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE
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Beschreibung
Zusammenfassung:	Decontamination of hardening salt residues is accomplished by treating the large pieces broken and slurried in water with an iron-II-chloride solution equivalent to the cyanide portion at a pH of 7-14, in the presence of at least the equivalent amount of alkali carbonate corresponding to the alkaline earth present, wherein the alkali carbonate does not exceed 30% based on the contaminated hardening salt residue.