Patents by Inventor Nariyasu Kanuka
Nariyasu Kanuka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20220347659Abstract: A method is described for producing a catalyst having a high raw material conversion rate and a high product selectivity, as well as an excellent yield of unsaturated carboxylic acid, the catalyst being used in a vapor-phase catalytic oxidation reaction for producing an unsaturated carboxylic acid such as acrylic acid or methacrolein from an unsaturated aldehyde such as acrolein or methacrolein. The method includes a molding process of molding a powder containing a catalyst component element to produce a catalyst precursor, where a sulfur-containing inorganic compound is added to the powder, and the powder is molded in the molding process.Type: ApplicationFiled: July 7, 2022Publication date: November 3, 2022Applicant: Mitsubishi Chemical CorporationInventors: Yoshimune ABE, Nariyasu KANUKA, Shigeki OKADA, Souhei KOUNO
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Publication number: 20220177401Abstract: A method for producing a catalyst for unsaturated carboxylic acid synthesis is proposed. The method includes: obtaining a dried product by drying and heat-treating a starting material mixed liquid in which supply source compounds of respective catalyst component elements are integrated; and forming a catalyst precursor by supporting powder to be supported on a carrier in the form of a particle aggregate. The powder to be supported is either the dried product or obtained from the dried product. The method further includes calcining the catalyst precursor to form the catalyst. The mass loss rate of the powder to be supported at 300° C. is less than 5 percent by mass, and the difference between the mass loss rate of the powder at 370° C. and the mass loss rate of the powder at 300° C. is not less than 1 percent by mass and not more than 6 percent by mass.Type: ApplicationFiled: March 27, 2020Publication date: June 9, 2022Applicant: Mitsubishi Chemical CorporationInventors: Yoshimune ABE, Nariyasu KANUKA, Shigeki OKADA
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Publication number: 20120130137Abstract: The present invention relates to a process of producing a conjugated diene including a step of mixing a raw material gas containing a monoolefin having a carbon atom number of 4 or more with a molecular oxygen-containing gas and supplying the mixture into a reactor, and a step of obtaining a corresponding conjugated diene-containing product gas produced by the oxidative dehydrogenation reaction of the monoolefin having a carbon atom number of 4 or more in the presence of a catalyst, wherein the concentration of a combustible gas in the gas supplied to the reactor is not less than the upper explosion limit and the oxygen concentration in the product gas is from 2.5 to 8.0 vol %.Type: ApplicationFiled: November 28, 2011Publication date: May 24, 2012Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Souichi ORITA, Hiroshi Takeo, Masaru Utsunomiya, Takuma Nishio, Hiroyuki Yagi, Nariyasu Kanuka
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Patent number: 7632777Abstract: A composite oxide catalyst for the oxidation of an olefin containing Mo and Bi as essential components, characterized in that it has a specific surface area of 5 to 25 m2/g and a pore volume of 0.2 to 0.7 cc/g, and has a pore diameter distribution wherein the volume of the pores having a pore diameter of 0.03 to 0.1 ?m accounts for 30% or more of the total pore volume, the volume of the pores having a pore diameter of 0.1 to 1 ?m accounts for 20% or more of the total pore volume, and the volume of the pores having a pore diameter of less than 0.Type: GrantFiled: November 8, 2002Date of Patent: December 15, 2009Assignee: Mitsubishi Chemical CorporationInventors: Isao Teshigahara, Nariyasu Kanuka, Tomoatsu Iwakura
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Patent number: 7579501Abstract: A composite oxide catalyst for the oxidation of an olefin containing Mo and Bi as essential components, characterized in that it has a specific surface area of 5 to 25 m2/g and a pore volume of 0.2 to 0.7 cc/g, and has a pore diameter distribution wherein the volume of the pores having a pore diameter of 0.03 to 0.1 ?m accounts for 30% or more of the total pore volume, the volume of the pores having a pore diameter of 0.1 to 1 ?m accounts for 20% or more of the total pore volume, and the volume of the pores having a pore diameter of less than 0.Type: GrantFiled: December 5, 2007Date of Patent: August 25, 2009Assignee: Mitsubishi Chemical CorporationInventors: Isao Teshigahara, Nariyasu Kanuka, Tomoatsu Iwakura
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Publication number: 20080286186Abstract: A composite oxide catalyst for the oxidation of an olefin containing Mo and Bi as essential components, characterized in that it has a specific surface area of 5 to 25 m2/g and a pore volume of 0.2 to 0.7 cc/g, and has a pore diameter distribution wherein the volume of the pores having a pore diameter of 0.03 to 0.1 ?m accounts for 30% or more of the total pore volume, the volume of the pores having a pore diameter of 0.1 to 1 ?m accounts for 20% or more of the total pore volume, and the volume of the pores having a pore diameter of less than 0.Type: ApplicationFiled: December 5, 2007Publication date: November 20, 2008Inventors: Isao Teshigahara, Nariyasu Kanuka, Tomoatsu Iwakura
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Publication number: 20080119667Abstract: A composite oxide catalyst for the oxidation of an olefin containing Mo and Bi as essential components, characterized in that it has a specific surface area of 5 to 25 m2/g and a pore volume of 0.2 to 0.7 cc/g, and has a pore diameter distribution wherein the volume of the pores having a pore diameter of 0.03 to 0.1 ?m accounts for 30% or more of the total pore volume, the volume of the pores having a pore diameter of 0.1 to 1 ?m accounts for 20% or more of the total pore volume, and the volume of the pores having a pore diameter of less than 0.Type: ApplicationFiled: December 5, 2007Publication date: May 22, 2008Inventors: Isao Teshigahara, Nariyasu Kanuka, Tomoatsu Iwakura
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Publication number: 20080107583Abstract: A composite oxide catalyst for the oxidation of an olefin containing Mo and Bi as essential components, characterized in that it has a specific surface area of 5 to 25 m2/g and a pore volume of 0.2 to 0.7 cc/g, and has a pore diameter distribution wherein the volume of the pores having a pore diameter of 0.03 to 0.1 ?m accounts for 30% or more of the total pore volume, the volume of the pores having a pore diameter of 0.1 to 1 ?m accounts for 20% or more of the total pore volume, and the volume of the pores having a pore diameter of less than 0.Type: ApplicationFiled: December 5, 2007Publication date: May 8, 2008Inventors: Isao Teshigahara, Nariyasu Kanuka, Tomoatsu Iwakura
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Patent number: 7279442Abstract: A process for producing a catalyst which has a high mechanical strength and is capable of producing an unsaturated aldehyde and an unsaturated carboxylic acid constantly over a long period of time and in good yield; and, a method for producing an unsaturated aldehyde or carboxylic acid from catalytic oxidation of an olefin, a tertiary butyl alcohol, or a methyl tertiary butyl ether substrate with a gas that contains molecular oxygen and the produced catalyst.Type: GrantFiled: January 12, 2005Date of Patent: October 9, 2007Assignee: Mitsubishi Chemical CorporationInventors: Isao Teshigahara, Nariyasu Kanuka, Kazuharu Tazawa
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Patent number: 7262148Abstract: A catalyst for producing from an olefin the corresponding unsaturated aldehyde and unsaturated carboxylic acid in good yield, and a process for its production, are presented. It is a composite oxide catalyst containing at least molybdenum, bismuth and iron, to be used at the time of gas phase catalytic oxidation of an olefin with a molecular oxygen-containing gas to produce the corresponding unsaturated aldehyde and unsaturated carboxylic acid, wherein the loss on drying of the contained moisture, as represented by the following formula (1) (wherein W1 represents the weight when the catalyst is heated for two hours at 110±5° C., and W2 represents the weight of the catalyst prior to such heating), is at most 0.5 wt %: Loss on drying=(W2?W1)/W2×100.Type: GrantFiled: January 12, 2005Date of Patent: August 28, 2007Assignee: Mitsubishi Chemical CorporationInventors: Isao Teshigahara, Nariyasu Kanuka
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Patent number: 7132384Abstract: A process for producing a composite oxide catalyst to be used for gas phase oxidation of an olefin or unsaturated aldehyde with molecular oxygen to produce the corresponding unsaturated aldehyde and/or unsaturated carboxylic acid, which has a uniform constant high performance, in an industrial scale and efficiently and constantly, is presented. The process comprises a step of molding a catalyst component-containing powder and a step of calcining a molded product obtained in the molding step, wherein the molding step is a step wherein graphite particles having an average particle diameter D50 of from 10 to 50 ?m and having a combustion initiating temperature in a differential thermogravimetric analysis higher by at least 50° C. than the calcination temperature in the next calcination step, are added to the catalyst component-containing powder in an amount of from 0.Type: GrantFiled: January 28, 2005Date of Patent: November 7, 2006Assignee: Mitsubishi Chemical CorporationInventors: Isao Teshigahara, Nariyasu Kanuka
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Publication number: 20050165253Abstract: A new process for producing a catalyst which has a high mechanical strength and which is capable of producing an unsaturated aldehyde and an unsaturated carboxylic acid constantly over a long period of time and in good yield, is presented. A process for producing a catalyst for the production of an unsaturated aldehyde and an unsaturated carboxylic acid, which is a process for producing a catalyst containing at least molybdenum, bismuth and iron, to be used at the time of gas phase catalytic oxidation of an olefin, tertiary butyl alcohol or methyl tertiary butyl ether with a molecular oxygen-containing gas to produce the respectively corresponding unsaturated aldehyde and unsaturated carboxylic acid, characterized in that a mixed solution or aqueous slurry containing the above catalyst components, is dried, the moisture content of the obtained dried product is adjusted to be from 0.3 to 4 wt %, followed by tabletting.Type: ApplicationFiled: January 12, 2005Publication date: July 28, 2005Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Isao Teshigahara, Nariyasu Kanuka, Kazuharu Tazawa
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Publication number: 20050159620Abstract: A catalyst for producing from an olefin the corresponding unsaturated aldehyde and unsaturated carboxylic acid in good yield, and a process for its production, are presented. It is a composite oxide catalyst containing at least molybdenum, bismuth and iron, to be used at the time of gas phase catalytic oxidation of an olefin with a molecular oxygen-containing gas to produce the corresponding unsaturated aldehyde and unsaturated carboxylic acid, wherein the loss on drying of the contained moisture, as represented by the following formula (1) (wherein W1 represents the weight when the catalyst is heated for two hours at 110±5° C., and W2 represents the weight of the catalyst prior to such heating), is at most 0.Type: ApplicationFiled: January 12, 2005Publication date: July 21, 2005Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Isao Teshigahara, Nariyasu Kanuka
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Publication number: 20050131253Abstract: A process for producing a composite oxide catalyst to be used for gas phase oxidation of an olefin or unsaturated aldehyde with molecular oxygen to produce the corresponding unsaturated aldehyde and/or unsaturated carboxylic acid, which has a uniform constant high performance, in an industrial scale and efficiently and constantly, is presented. The process comprises a step of molding a catalyst component-containing powder and a step of calcining a molded product obtained in the molding step, wherein the molding step is a step wherein graphite particles having an average particle diameter D50 of from 10 to 50 ?m and having a combustion initiating temperature in a differential thermogravimetric analysis higher by at least 50° C. than the calcination temperature in the next calcination step, are added to the catalyst component-containing powder in an amount of from 0.Type: ApplicationFiled: January 28, 2005Publication date: June 16, 2005Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Isao Teshigahara, Nariyasu Kanuka
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Publication number: 20050033093Abstract: A composite oxide catalyst for the oxidation of an olefin containing Mo and Bi as essential components, characterized in that it has a specific surface area of 5 to 25 m2/g and a pore volume of 0.2 to 0.7 cc/g, and has a pore diameter distribution wherein the volume of the pores having a pore diameter of 0.03 to 0.1 ?m accounts for 30% or more of the total pore volume, the volume of the pores having a pore diameter of 0.1 to 1 ?m accounts for 20% or more of the total pore volume, and the volume of the pores having a pore diameter of less than 0.Type: ApplicationFiled: November 8, 2002Publication date: February 10, 2005Inventors: Isao Teshigahara, Nariyasu Kanuka, Tomoatsu Iwakura