REGENERATION METHOD OF INACTIVATED AND POISONED PLATINUM CATALYST

PURPOSE: To provide a regenerating method for effectively recovering a noble metal used for synthesizing a hydroxylammonium salt by catalytic reduction of nitrogen oxide with hydrogen, particularly a platinum-supported catalyst without requiring an additional process. CONSTITUTION: This catalyst reg...

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Hauptverfasser:	FURANTSUUYOOZEFU BUAISU, FUUGO FUKUSU
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOUNDS THEREOF INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	PURPOSE: To provide a regenerating method for effectively recovering a noble metal used for synthesizing a hydroxylammonium salt by catalytic reduction of nitrogen oxide with hydrogen, particularly a platinum-supported catalyst without requiring an additional process. CONSTITUTION: This catalyst regenerating method is characterized by treating a noble metal catalyst used for catalytic reduction of nitrogen oxide with hydrogen in an aqueous alkaline solution having a pH higher than 9.