Patent application number | Description | Published |
20110288325 | METHOD FOR PRODUCING SILICA-SUPPORTED CATALYST, AND METHOD FOR PRODUCING UNSATURATED CARBOXYLIC ACID OR UNSATURATED NITRILE - Disclosed is a silica-supported catalyst having excellent wear resistance, by which an object product can be obtained with excellent yield. Specifically disclosed is a method for producing a silica-supported catalyst which contains Mo, V, Nb and component X (that is Sb and/or Te), and is used in a vapor-phase catalytic oxidation reaction or vapor-phase catalytic ammoxidation reaction of propane. The method for producing a silica-supported catalyst comprises: (I) a step wherein Mo, V, Nb, component X, a silica sol and water are mixed, thereby preparing a starting material blended solution; (II) a step wherein the starting material blended solution is dried, thereby obtaining a dried powder; and (III) a step wherein the dried powder is tired, thereby obtaining a silica-supported catalyst. In the method for producing a silica-supported catalyst, the silica sol contains 10-270 ppm by weight of nitrate ions relative to SiO | 11-24-2011 |
20130053596 | MIXED CATALYST - It is an object of the present invention to provide a mixed catalyst for a vapor-phase catalytic oxidation or a vapor-phase catalytic ammoxidation reaction of propane or isobutane, capable of providing a corresponding unsaturated acid or unsaturated nitrile at high yield from propane or isobutane. A mixed catalyst for a vapor-phase catalytic oxidation reaction or a vapor-phase catalytic ammoxidation reaction of propane or isobutane comprises: | 02-28-2013 |
20130225862 | OXIDE CATALYST, PROCESS FOR PRODUCING OXIDE CATALYST, PROCESS FOR PRODUCING UNSATURATED ACID, AND PROCESS FOR PRODUCING UNSATURATED NITRILE - Disclosed is a process for producing an oxide catalyst for use in the gas-phase catalytic oxidation reaction or the like of propane or the like, the process comprising the steps of: (I) obtaining a preparation containing compounds of Mo, V, Nb, and Sb or Te at the predetermined atomic ratios; (II) drying the preparation to obtain a dry powder; and (III) calcining the dry powder, wherein the step (III) comprises the step of calcining the dry powder in the presence of a compound containing W in the form of a solid to obtain a pre-stage calcined powder or a mainly calcined powder, or the step of calcining the dry powder and calcining the obtained pre-stage calcined powder in the presence of the solid to obtain a mainly calcined powder, the solid satisfies the predetermined conditions, and the oxide catalyst comprises a catalytic component having the predetermined composition. | 08-29-2013 |
20130253216 | APPARATUS AND METHOD FOR PRODUCING CATALYST, AND METHOD FOR PRODUCING UNSATURATED ACID OR UNSATURATED NITRILE - An apparatus for producing a catalyst comprising a tank configured to prepare an aqueous mixed solution containing a Mo compound, a V compound and a Nb compound, a dryer configured to spray-dry the aqueous mixed solution, and a pipe for connecting the tank with the dryer so that the aqueous mixed solution can be supplied from the tank to the dryer, wherein a heater configured to heat the aqueous mixed solution is provided in the tank and/or the pipe, and a filter configured to filtrate the aqueous mixed solution is provided in the pipe. | 09-26-2013 |
20130253217 | COMPOSITE OXIDE CATALYST AND METHOD FOR PRODUCING THE SAME - A method for producing a complex oxide catalyst containing a complex oxide represented by the formula: | 09-26-2013 |
20130310593 | APPARATUS FOR PRODUCING MIXED SOLUTION AND METHOD FOR PREPARING MIXED SOLUTION - An apparatus for producing a mixed solution, comprising a mixing vessel for preparing an aqueous mixed solution containing a dicarboxylic acid and a Nb compound and a filter for the aqueous mixed solution connected to the mixing vessel via a pipe, the mixing vessel being anticorrosive and equipped with a stirring unit, a heating unit and a cooling unit for the aqueous mixed solution, wherein the aqueous mixed solution prepared in the mixing vessel is fed to the filter via the pipe and filtered in the filter under increased pressure. | 11-21-2013 |
20140256977 | Method for Producing Silica-Supported Catalyst, and Method for Producing Unsaturated Carboxylic Acid or Unsaturated Nitrile - To produce a silica-supported catalyst having an excellent yield of a target product and excellent catalyst attrition resistance. | 09-11-2014 |
20150231604 | COMPOSITE OXIDE CATALYST, METHOD FOR PRODUCING THE SAME, AND METHOD FOR PRODUCING UNSATURATED NITRILE - It is an object of the present invention to provide a composite oxide catalyst which can suppress the generation of CO | 08-20-2015 |