METHOD FOR MANUFACTURING OLEFIN OXIDE USING RHENIUM- CONTAINING CATALYST

PROBLEM TO BE SOLVED: To perform a reaction with high selectivity through a long time at the time of manufacturing olefin oxide by the vapor phase catalytic oxidation of olefin by using a catalyst with a support, which contains Ag, Re and an alkali metal as active ingredients. SOLUTION: The selectiv...

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1. Verfasser:	NAKADAI KATSUMI
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS GENERAL METHODS OF ORGANIC CHEMISTRY GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HETEROCYCLIC COMPOUNDS METALLURGY ORGANIC CHEMISTRY 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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Zusammenfassung:	PROBLEM TO BE SOLVED: To perform a reaction with high selectivity through a long time at the time of manufacturing olefin oxide by the vapor phase catalytic oxidation of olefin by using a catalyst with a support, which contains Ag, Re and an alkali metal as active ingredients. SOLUTION: The selectivity of the olefin oxide is monitored with time and when the selectivity is lowered by >=0.7 % per one week, the concentration of a halogen compound in a gaseous starting material is increased by >=0.15 vol. ppm as halogen molecule.