MANUFACTURING METHOD OF HETEROPOLY-ACID BASED CATALYST FOR MANUFACTURING METHACRYLIC ACID

PROBLEM TO BE SOLVED: To easily and inexpensively manufacture a heteropoly-acid based catalyst for manufacturing methacrylic acid from the used heteropoly-acid based catalyst for manufacturing methacrylic acid at a yield of 90% ore higher relative to an unused one. SOLUTION: The manufacturing method...

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1. Verfasser:	MASAKI TOMOHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS 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 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 easily and inexpensively manufacture a heteropoly-acid based catalyst for manufacturing methacrylic acid from the used heteropoly-acid based catalyst for manufacturing methacrylic acid at a yield of 90% ore higher relative to an unused one. SOLUTION: The manufacturing method of the heteropoly-acid based catalyst for manufacturing methacrylic acid has a separation step for contacting the used heteropoly-acid based catalyst containing one kind or more of elements selected from the group consisting of cesium, potassium, thallium and rubidium and molybdenum and used for manufacturing of methacrylic acid by vapor phase contact oxidation with an aqueous medium of pH 1 to less than pH 8, and solid/liquid-separating the obtained dispersion to a liquid component and a solid recovery component, and a catalyst preparation step for preparing the heteropoly-acid based catalyst for manufacturing methacrylic acid making the solid recovery component as a material. COPYRIGHT: (C)2008,JPO&INPIT