Grid of precious metals for the recovery of platinum metals escaping from a catalyst during the reaction, and especially of platinum during oxidation of ammonia

The subject of the invention is a grid of precious metals for the recovery of platinum metals escaping from a catalyst during the reaction of oxidation of ammonia in the production process of nitric oxide. In the reactions conducted in the presence of the catalysts containing platinum metals at the...

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Bibliographische Detailangaben
Hauptverfasser:	MAREK, MIECZYSLAW, SKALSKI, ANDRZEJ, SKOWRONSKI, BOLESLAW, BRZESKI, ANDRZEJ, SPRINGWALD, ANTONI, BLASIAK, EUGENIUSZ, KOZLOWSKI, KAZIMIERZ, NYC, JANUSZ, WEGLARSKA-ZAGORNA, HENRYKA, POLAK, PAWEL, STUDENCKI, JERZY, RETMANIAK, TADEUSZ
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS COMPOUNDS THEREOF 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 NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The subject of the invention is a grid of precious metals for the recovery of platinum metals escaping from a catalyst during the reaction of oxidation of ammonia in the production process of nitric oxide. In the reactions conducted in the presence of the catalysts containing platinum metals at the incandesence temperature a loss in the mass of precious metals occurs, which disadvantageously effects the economy of the process. For the recovery of platinum escaping from a catalyst during the reaction of oxidation of ammonia the grids mainly used are those made of palladium-gold alloy, which, in order to increase their strength, are spot-welded into packs, or the separating grids of heat-resisting materials are used. The known methods of increasing the strength and the durability of the recovery grids are disadvantageous, as the flow of reactants through a pack of grids meets additional resistance, which causes a decrease of the process effectiveness. The grid according to the invention is characterized by a different thickness of wires in the weave of the grid made of the same precious metals which are used for the recovery of platinum metals. The wires of various thickness are applied, depending on the type of the catalytic process.