The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 20, 2020
Filed:
Mar. 24, 2016
Asahi Kasei Kabushiki Kaisha, Tokyo, JP;
Sho Tamura, Tokyo, JP;
Dai Nagata, Tokyo, JP;
ASAHI KASEI KABUSHIKI KAISHA, Tokyo, unknown;
Abstract
The present invention provides a method for producing a catalyst to be used for a gas-phase catalytic ammoxidation reaction of propane, the method comprising a preparation step of dissolving or dispersing a raw material to thereby obtain a prepared raw material liquid, a first drying step of drying the prepared raw material liquid to thereby obtain a dried material, a calcination step of calcining the dried material to thereby obtain a composite oxide having a predetermined composition, an impregnation step of impregnating the composite oxide with a solution containing at least one specific element selected from the group consisting of tungsten, molybdenum, tellurium, niobium, vanadium, boron, bismuth, manganese, iron, antimony, phosphorus and rare earth elements to thereby obtain an impregnated composite oxide, and a second drying step of drying the impregnated composite oxide, wherein at least one of the impregnation step o and the second drying step is a step of impregnating the composite oxide or drying the impregnated composite oxide while stirring by a specific stirring power.