METHOD FOR ACTIVATING HYDROGENATION CATALYST AND METHOD FOR PRODUCING HYDROGEN PEROXIDE INCLUDING SAME

A method for restoring a hydrogenation catalyst and a method for preparing hydrogen peroxide containing the hydrogenation catalyst are provided to restore selectivity and activity of the hydrogenation catalyst without damaging the strength of the hydrogenation catalyst. Hydrogen peroxide is prepared...

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Bibliographische Detailangaben
Hauptverfasser:	IURA KATSUHIRO, HASEGAWA HIROSHI, HAGIWARA ISAO, SAWAMOTO SHINJIRO
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 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 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
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Beschreibung
Zusammenfassung:	A method for restoring a hydrogenation catalyst and a method for preparing hydrogen peroxide containing the hydrogenation catalyst are provided to restore selectivity and activity of the hydrogenation catalyst without damaging the strength of the hydrogenation catalyst. Hydrogen peroxide is prepared through an anthraquinone type by performing a reducing process and a catalyst restoring process. For performing the catalyst restoring process, firstly, a hydrogenation catalyst is treated with a first alkaline solution of more than pH 10 so that a catalyst immersion liquid, where pure water of 5 wt% is mixed into the hydrogen catalyst after restoration of 1 wt%, has a pH of 8.0 or more. The treated hydrogenation catalyst is cleaned by water or a second alkaline solution having a lower alkalinity than the first alkaline solution.