METHOD FOR MANUFACTURING CATALYST FOR SYNTHESIZING FORMALDEHYDE SYNTHESIS

PROBLEM TO BE SOLVED: To provide a method for manufacturing a ferrimolybdate catalyst for synthesis of formaldehyde by oxidizing methanol by an excess air method at a high conversion rate and a high selectivity and prolonging its service life. SOLUTION: An aqueous solution of iron (III) salt is adde...

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Hauptverfasser:	KOTANI KAZUHIRO, SEZAKI YOSHIHIRO, SUEHIRO MASAKO, TAKAHASHI KENTA, INOMATA MASASANE
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for manufacturing a ferrimolybdate catalyst for synthesis of formaldehyde by oxidizing methanol by an excess air method at a high conversion rate and a high selectivity and prolonging its service life. SOLUTION: An aqueous solution of iron (III) salt is added to an aqueous solution of a molybate to produce a slurry solution of a Mo/Fe molar ratio of 1.4-1.6. The slurry solution is subjected to a hydrothermal reaction at a temperature of 70 deg.C-boiling point for 2-10 h. Produced ferrimolybdate crystal is filtered, washed and dried, and it is molded, or carried on a carrier, and burned at 500-650 deg.C for 2-6 h to obtain an oxidation catalyst.