Patents by Inventor Yasuteru Kajikawa

Yasuteru Kajikawa 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).

  • Patent number: 11040334
    Abstract: Provided is a catalyst for reduction reaction with which 1,4-butanediol or tetrahydrofuran can be obtained with higher selectivity than with the related art, using a raw material derived from biomass. The catalyst is used in a reduction reaction of 3,4-dihydroxytetrahydrofuran with hydrogen, wherein the catalyst contains metal catalysts (1) and (2) below; metal catalyst (1): a catalyst containing M1 and M2 below as metal species and supported on a carrier; and metal catalyst (2): a catalyst containing M1 below as a metal species and supported on a carrier; M1: one or more selected from the group consisting of iron and elements belonging to periods 4 to 6 and groups 5 to 7 of the periodic table; and M2: one or more selected from the group consisting of ruthenium, osmium, and elements belonging to periods 4 to 6 and groups 9 to 11 of the periodic table.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: June 22, 2021
    Assignee: DAICEL CORPORATION
    Inventors: Keiichi Tomishige, Yoshinao Nakagawa, Masazumi Tamura, Yuuichirou Hirai, Yasuteru Kajikawa, Keisuke Ono
  • Patent number: 10751704
    Abstract: A hydrogenation reaction catalyst used for a reaction of 1,4-anhydroerythritol and hydrogen to produce 3-hydroxytetrahydrofuran includes a carrier, at least one oxide selected from the group consisting of an oxide of a Group 6 element and an oxide of a Group 7 element, the oxide being supported on the carrier, and a metal other than a Group 6 element and a Group 7 element, the other metal being supported on the carrier. The amount of the oxide supported on the carrier in terms of a metal atom forming the oxide is 0.01 to 10% by weight based on the total amount of the oxide and the carrier being 100% by weight. The molar ratio in terms of metal of the other metal to the Group 6 element and Group 7 element forming the oxide [other metal/Group 6 element and Group 7 element] is 50/1 to 1/4.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: August 25, 2020
    Assignee: DAICEL CORPORATION
    Inventors: Keiichi Tomishige, Yoshinao Nakagawa, Yasuteru Kajikawa, Yuuichirou Hirai
  • Publication number: 20190366304
    Abstract: Provided is a catalyst for reduction reaction with which 1,4-butanediol or tetrahydrofuran can be obtained with higher selectivity than with the related art, using a raw material derived from biomass. The catalyst is used in a reduction reaction of 3,4-dihydroxytetrahydrofuran with hydrogen, wherein the catalyst contains metal catalysts (1) and (2) below; metal catalyst (1): a catalyst containing M1 and M2 below as metal species and supported on a carrier; and metal catalyst (2): a catalyst containing M1 below as a metal species and supported on a carrier; M1: one or more selected from the group consisting of iron and elements belonging to periods 4 to 6 and groups 5 to 7 of the periodic table; and M2: one or more selected from the group consisting of ruthenium, osmium, and elements belonging to periods 4 to 6 and groups 9 to 11 of the periodic table.
    Type: Application
    Filed: December 28, 2017
    Publication date: December 5, 2019
    Applicant: DAICEL CORPORATION
    Inventors: Keiichi TOMISHIGE, Yoshinao NAKAGAWA, Masazumi TAMURA, Yuuichirou HIRAI, Yasuteru KAJIKAWA, Keisuke ONO
  • Publication number: 20190276309
    Abstract: Provided is a method for generating hydrogen at a desired rate, using a hydrogen storage material that can be stored and transported safely and inexpensively. The method according to the present invention for producing a silanol compound and hydrogen includes subjecting a hydrosilane compound and water to a reaction with each other in the presence of a solid catalyst to give a silanol compound and hydrogen. The solid catalyst includes hydroxyapatite and gold particles supported on the hydroxyapatite, where the gold particles have an average particle size of 2.5 nm or less. The reaction in the method according to the present invention for producing a silanol compound and hydrogen is preferably performed in an air atmosphere. The reaction in the method according to the present invention for producing a silanol compound and hydrogen can be performed with application of substantially no heat and no activated energy rays.
    Type: Application
    Filed: September 8, 2017
    Publication date: September 12, 2019
    Applicants: OSAKA UNIVERSITY, DAICEL CORPORATION
    Inventors: Kiyotomi KANEDA, Takato MITSUDOME, Yasuteru KAJIKAWA, Yuuichirou HIRAI, Keisuke ONO
  • Publication number: 20190262805
    Abstract: A hydrogenation reaction catalyst used for a reaction of 1,4-anhydroerythritol and hydrogen to produce 3-hydroxytetrahydrofuran includes a carrier, at least one oxide selected from the group consisting of an oxide of a Group 6 element and an oxide of a Group 7 element, the oxide being supported on the carrier, and a metal other than a Group 6 element and a Group 7 element, the other metal being supported on the carrier. The amount of the oxide supported on the carrier in terms of a metal atom forming the oxide is 0.01 to 10% by weight based on the total amount of the oxide and the carrier being 100% by weight. The molar ratio in terms of metal of the other metal to the Group 6 element and Group 7 element forming the oxide [other metal/Group 6 element and Group 7 element] is 50/1 to 1/4.
    Type: Application
    Filed: May 10, 2019
    Publication date: August 29, 2019
    Applicant: DAICEL CORPORATION
    Inventors: Keiichi TOMISHIGE, Yoshinao NAKAGAWA, Yasuteru KAJIKAWA, Yuuichirou HIRAI
  • Publication number: 20150298101
    Abstract: An object of the present invention is to provide a method for producing 3-hydroxytetrahydrofuran that can be used as a raw material for 1,3-butane diol, using as a raw material a compound that can be derived from biomass. The present invention relates to a method for producing 3-hydroxytetrahydrofuran including a step of reacting 1,4-anhydroerythritol and hydrogen to produce 3-hydroxytetrahydrofuran. In the production method, the step of reacting 1,4-anhydroerythritol and hydrogen is preferably allowed to proceed in the presence of a catalyst comprising a carrier and at least one oxide selected from the group consisting of an oxide of a Group 6 element and an oxide of a Group 7 element, the oxide being supported on the carrier.
    Type: Application
    Filed: October 30, 2013
    Publication date: October 22, 2015
    Applicant: DAICEL CORPORATION
    Inventors: Keiichi TOMISHIGE, Yoshinao NAKAGAWA, Yasuteru KAJIKAWA, Yuuichirou HIRAI
  • Patent number: 8217182
    Abstract: A cyclic polycarboxylic acid anhydride, a polycarboxylic acid, or a mixture of them is allowed to react with hydroxylamine or a salt thereof in an organic solvent under dewatering conditions to yield a corresponding cyclic N-hydroxyimide compound. The cyclic polycarboxylic acid anhydride can be, for example, succinic anhydride or glutaric anhydride. The polycarboxylic acid can be, for example, succinic acid, glutaric acid, or adipic acid. In this process, the reaction is preferably carried out using an organic solvent capable of undergoing azeotropy with water as all or part of a reaction solvent while removing water from the reaction system by azeotropy with the organic solvent. This process produces a cyclic N-hydroxyimide compound in a good yield from any of a cyclic polycarboxylic acid anhydride and a polycarboxylic acid.
    Type: Grant
    Filed: July 28, 2009
    Date of Patent: July 10, 2012
    Assignee: Daicel Chemical Industries, LTD.
    Inventor: Yasuteru Kajikawa
  • Patent number: 7910749
    Abstract: A method oxidizes an organic compound with oxygen in the presence of a catalyst, in which the catalyst contains a N-hydroxy- or N-(substituted oxy)-imide compound derivable from at least one selected from a target product, a reaction intermediate, and a reaction byproduct, and the catalyst is produced from at least one component selected from the target product, reaction intermediate, and reaction byproduct each formed as a result of the reaction and is used in the oxidation reaction so as to make up for a loss of the catalyst due to denaturation in the reaction. The method can easily and inexpensively make up for a loss of the catalyst denaturated in the course of reaction.
    Type: Grant
    Filed: February 22, 2006
    Date of Patent: March 22, 2011
    Assignee: Daicel Chemical Industrial, Ltd.
    Inventors: Yasuteru Kajikawa, Naruhisa Hirai, Jun Kuwana
  • Publication number: 20090286993
    Abstract: A cyclic polycarboxylic acid anhydride, a polycarboxylic acid, or a mixture of them is allowed to react with hydroxylamine or a salt thereof in an organic solvent under dewatering conditions to yield a corresponding cyclic N-hydroxyimide compound. The cyclic polycarboxylic acid anhydride can be, for example, succinic anhydride or glutaric anhydride. The polycarboxylic acid can be, for example, succinic acid, glutaric acid, or adipic acid. In this process, the reaction is preferably carried out using an organic solvent capable of undergoing azeotropy with water as all or part of a reaction solvent while removing water from the reaction system by azeotropy with the organic solvent. This process produces a cyclic N-hydroxyimide compound in a good yield from any of a cyclic polycarboxylic acid anhydride and a polycarboxylic acid.
    Type: Application
    Filed: July 28, 2009
    Publication date: November 19, 2009
    Inventor: Yasuteru KAJIKAWA
  • Patent number: 7582774
    Abstract: A cyclic polycarboxylic acid anhydride, a polycarboxylic acid, or a mixture of them is allowed to react with hydroxylamine or a salt thereof in an organic solvent under dewatering conditions to yield a corresponding cyclic N-hydroxyimide compound. The cyclic polycarboxylic acid anhydride can be, for example, succinic anhydride or glutaric anhydride. The polycarboxylic acid can be, for example, succinic acid, glutaric acid, or adipic acid. In this process, the reaction is preferably carried out using an organic solvent capable of undergoing azeotropy with water as all or part of a reaction solvent while removing water from the reaction system by azeotropy with the organic solvent. This process produces a cyclic N-hydroxyimide compound in a good yield from any of a cyclic polycarboxylic acid anhydride and a polycarboxylic acid.
    Type: Grant
    Filed: March 28, 2005
    Date of Patent: September 1, 2009
    Assignee: Daicel Chemical Industries, Ltd.
    Inventor: Yasuteru Kajikawa
  • Publication number: 20080269507
    Abstract: A method oxidizes an organic compound with oxygen in the presence of a catalyst, in which the catalyst contains a N-hydroxy- or N-(substituted oxy)-imide compound derivable from at least one selected from a target product, a reaction intermediate, and a reaction byproduct, and the catalyst is produced from at least one component selected from the target product, reaction intermediate, and reaction byproduct each formed as a result of the reaction and is used in the oxidation reaction so as to make up for a loss of the catalyst due to denaturation in the reaction. The method can easily and inexpensively make up for a loss of the catalyst denaturated in the course of reaction.
    Type: Application
    Filed: February 22, 2006
    Publication date: October 30, 2008
    Inventors: Yasuteru Kajikawa, Naruhisa Hirai, Jun Kuwana
  • Patent number: 7371444
    Abstract: In the present invention, there are obtained aliphatic polyesters having a controlled thermal decomposing property, hydrolizability, and biodegradability, in which OH terminals and COOR terminals are decreased to 50% and 30%, respectively, through a ring-opening polymerization of a lactone and lactide by a mono alcohol having a high boiling point or a metal alkoxide, or by further decreasing both terminals through combining produced polymer terminals with a diisocyanate and, from a composition containing the polyesters, there is obtained a particle-state composition for agriculture and gardening in which a duration period of a fertilizing effect can be controlled, and which is not remained in soil by decomposition.
    Type: Grant
    Filed: November 18, 2004
    Date of Patent: May 13, 2008
    Assignee: Daicel Chemical Industries, Inc.
    Inventor: Yasuteru Kajikawa
  • Publication number: 20070197798
    Abstract: A cyclic polycarboxylic acid anhydride, a polycarboxylic acid, or a mixture of them is allowed to react with hydroxylamine or a salt thereof in an organic solvent under dewatering conditions to yield a corresponding cyclic N-hydroxyimide compound. The cyclic polycarboxylic acid anhydride can be, for example, succinic anhydride or glutaric anhydride. The polycarboxylic acid can be, for example, succinic acid, glutaric acid, or adipic acid. In this process, the reaction is preferably carried out using an organic solvent capable of undergoing azeotropy with water as all or part of a reaction solvent while removing water from the reaction system by azeotropy with the organic solvent. This process produces a cyclic N-hydroxyimide compound in a good yield from any of a cyclic polycarboxylic acid anhydride and a polycarboxylic acid.
    Type: Application
    Filed: March 28, 2005
    Publication date: August 23, 2007
    Inventor: Yasuteru Kajikawa
  • Patent number: 7220469
    Abstract: This invention relates to aliphatic polyesters having a controlled thermal decomposition, hydrolizability, and biodegradability, in which OH terminals and COOH terminals are decreased through a ring-opening polymerization of a lactone and lactide by a mono alcohol or a metal alkoxide, or by decreasing both terminals through combining polymer terminals with diisocyanate. From a composition containing the polyesters, this invention provides a controlled release composition for agriculture.
    Type: Grant
    Filed: November 18, 2004
    Date of Patent: May 22, 2007
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Masanori Sakane, Michiyo Nakai, Kunio Shimizu, Yasuteru Kajikawa, Masaaki Ito
  • Patent number: 7015356
    Abstract: A carboxylic acid is produced by oxidative cleavage of a cycloalkane with oxygen and performs a reaction in the presence of a catalyst including an imide compound and a metallic compound, the imide compound having a cyclic imide skeleton represented by the following Formula (I): wherein X is an oxygen atom or an —OR group, and wherein R is a hydrogen atom or a hydroxyl-protecting group, under conditions of a reaction temperature of 80° C. or higher and a concentration of the cycloalkane of 21% by weight or more.
    Type: Grant
    Filed: December 7, 2001
    Date of Patent: March 21, 2006
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Yasutaka Ishii, Yasuteru Kajikawa
  • Publication number: 20050153149
    Abstract: This invention relates to aliphatic polyesters having a controlled thermal decomposition, hydrolizability, and biodegradability, in which OH terminals and COOH terminals are decreased through a ring-opening polymerization of a lactone and lactide by a mono alcohol or a metal alkoxide, or by decreasing both terminals through combining polymer terminals with diisocyanate. From a composition containing the polyesters, this invention provides a controlled release composition for agriculture.
    Type: Application
    Filed: November 18, 2004
    Publication date: July 14, 2005
    Inventors: Masanori Sakane, Michiyo Nakai, Kunio Shimizu, Yasuteru Kajikawa, Masaaki Ito
  • Publication number: 20050090401
    Abstract: In the present invention, there are obtained aliphatic polyesters having a controlled thermal decomposing property, hydrolizability, and biodegradability, in which OH terminals and COOH terminals are decreased to 50% and 30%, respectively, through a ring-opening polymerization of a lactone and lactide by a mono alcohol having a high boiling point or a metal alkoxide, or by further decreasing both terminals through combining produced polymer terminals with a diisocyanate and, from a composition containing the polyesters, there is obtained a particle-state composition for agriculture and gardening in which a duration period of a fertilizing effect can be controlled, and which is not remained in soil by decomposition.
    Type: Application
    Filed: November 18, 2004
    Publication date: April 28, 2005
    Inventors: Masanori Sakane, Michiyo Nakai, Kunio Shimizu, Yasuteru Kajikawa, Masaaki Ito
  • Publication number: 20040024248
    Abstract: A process of the present invention produces a corresponding dicarboxylic acid by oxidative cleavage of a cycloalkane with oxygen and performs a reaction in the presence of a catalyst including an imide compound and a metallic compound, the imide compound having a cyclic imide skeleton represented by following Formula (I): 1
    Type: Application
    Filed: June 11, 2003
    Publication date: February 5, 2004
    Inventors: Yasutaka Ishii, Yasuteru Kajikawa
  • Patent number: 6509440
    Abstract: In the present invention, there are obtained aliphatic polyesters having a controlled thermal decomposing property, hydrolizability, and biodegradability, in which OH terminals and COOH terminals are decreased to 50% and 30%, respectively, through a ring-opening polymerization of a lactone and lactide by a mono alcohol having a high boiling point or a metal alkoxide, or by further decreasing both terminals through combining produced polymer terminals with a diisocyanate and, from a composition containing the polyesters, there is obtained a particle-state composition for agriculture and gardening in which a duration period of a fertilizing effect can be controlled, and which is not remained in soil by decomposition.
    Type: Grant
    Filed: September 14, 2000
    Date of Patent: January 21, 2003
    Assignee: Daicel Chemical Industries, Ltd
    Inventors: Masanori Sakane, Michiyo Nakai, Kunio Shimizu, Yasuteru Kajikawa, Masaaki Ito
  • Patent number: 5756836
    Abstract: The present invention relates to a process for producing a highly purified acetic acid characterized in that in the process for producing acetic acid comprising the step of continuously reacting methanol and/or an aqueous solution of methyl acetate with carbon monoxide in a reactor, a treatment is conducted to limit the concentration of unsaturated compounds in crude acetic acid obtained in the process to 5 ppm or lower, and the resultant crude acetic acid is ozonized. The present invention also relates to a process for producing a highly purified acetic acid, characterized by comprising the step of continuously reacting methanol and/or an aqueous solution of methyl acetate with carbon monoxide in a reactor while maintaining the concentration of acetaldehyde in a reaction fluid in the reactor at 1500 ppm or lower.
    Type: Grant
    Filed: January 23, 1996
    Date of Patent: May 26, 1998
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Masahiko Shimizu, Kazuyuki Akita, Yasuteru Kajikawa, Takashi Ueno, Yasuo Tsuji, Yoshiaki Morimoto