Patents by Inventor Toshiya Yasukawa

Toshiya Yasukawa 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: 10550046
    Abstract: Provided are: a catalyst for dehydration, with which isobutylene is able to be produced with high conversion and high selectivity through a dehydration reaction of isobutanol; and a method for producing isobutylene. This catalyst has a BET specific surface area within the range of from 210 m2/g to 350 m2/g (inclusive) as calculated from N2 adsorption/desorption isotherms. It is preferable that this catalyst is formed of at least one substance selected from among alumina, silica alumina, zeolite, and solid phosphoric acid. It is more preferable that this catalyst contains alumina, and it is especially preferable that this catalyst is formed of alumina. In this method for producing isobutylene, the isobutanol concentration in the starting material gas is preferably 20% by volume or more, more preferably 40% by volume or more, and especially preferably 60% by volume or more. In addition, the temperature of a catalyst layer is preferably from 230° C. to 370° C. (inclusive), and more preferably from 240° C.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: February 4, 2020
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Tatsuya Suzuki, Akio Takeda, Toshiya Yasukawa, Wataru Ninomiya, Ken Ooyachi
  • Patent number: 10464860
    Abstract: The purpose of the present invention is to provide a method that can produce, with high yield or high selectivity isobutylene by means of isobutanol dehydration-reaction. An isobutylene production method of a first embodiment of the present invention is a method for producing isobutylene by means of isobutanol dehydration-reaction, wherein isobutanol is reacted using a catalyst for which the BET specific surface area is within the range of 60 m2/g-175 m2/g, and the reaction is carried out under a reaction pressure of 50 kPa-750 kPa as the absolute pressure. An isobutylene production method of a second embodiment of the present invention includes: using a catalyst which is filled into a reaction chamber and for which the particle diameters of at least 90 mass % of the catalyst are within the range of 700 ?m-1000 ?m; setting the isobutanol concentration within a supplied reaction gas to 30 vol %-85 vol %; setting the weight hourly velocity (WHSV) of the isobutanol to 0.
    Type: Grant
    Filed: May 1, 2015
    Date of Patent: November 5, 2019
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Toshiya Yasukawa, Tatsuya Suzuki, Akio Takeda, Wataru Ninomiya, Kenichi Miyaki, Ken Ooyachi, Shuji Akihara
  • Publication number: 20180072636
    Abstract: Provided are: a catalyst for dehydration, with which isobutylene is able to be produced with high conversion and high selectivity through a dehydration reaction of isobutanol; and a method for producing isobutylene. This catalyst has a BET specific surface area within the range of from 210 m2/g to 350 m2/g (inclusive) as calculated from N2 adsorption/desorption isotherms. It is preferable that this catalyst is formed of at least one substance selected from among alumina, silica alumina, zeolite, and solid phosphoric acid. It is more preferable that this catalyst contains alumina, and it is especially preferable that this catalyst is formed of alumina. In this method for producing isobutylene, the isobutanol concentration in the starting material gas is preferably 20% by volume or more, more preferably 40% by volume or more, and especially preferably 60% by volume or more. In addition, the temperature of a catalyst layer is preferably from 230° C. to 370° C. (inclusive), and more preferably from 240° C.
    Type: Application
    Filed: April 20, 2016
    Publication date: March 15, 2018
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Tatsuya SUZUKI, Akio TAKEDA, Toshiya YASUKAWA, Wataru NINOMIYA, Ken OOYACHI
  • Patent number: 9840453
    Abstract: Provided is a method for producing isobutylene with a high selectivity by a dehydration reaction of isobutanol. There are provided a method for producing isobutylene by dehydration of isobutanol, in which the dehydration of isobutanol is performed in a state where at least one of an organic acid and an organic acid ester is present in a reaction system, and methods for producing methacrylic acid and methyl methacrylate from the obtained isobutylene.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: December 12, 2017
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Shuji Akihara, Tatsuya Suzuki, Toshiya Yasukawa, Akio Takeda, Kenichi Miyaki, Ken Ooyachi
  • Patent number: 9815748
    Abstract: Provided are a catalyst whereby isobutylene can be produced at high yield in a lower-temperature environment, and a method for producing isobutylene using the catalyst. The catalyst for producing isobutylene is an oxide including at least one element selected from molybdenum and tungsten, and at least one element selected from tantalum, niobium, and titanium.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: November 14, 2017
    Assignees: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY, Mitsubishi Chemical Corporation
    Inventors: Wataru Ueda, Toru Murayama, Ken Ooyachi, Wataru Ninomiya, Toshiya Yasukawa
  • Patent number: 9670111
    Abstract: Provided are a catalyst whereby isobutylene can be produced at high yield in a lower-temperature environment, and a method for producing isobutylene using the catalyst. The catalyst for producing isobutylene is an oxide including at least one element selected from molybdenum and tungsten, and at least one element selected from tantalum, niobium, and titanium.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: June 6, 2017
    Assignees: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY, MITSUBISHI RAYON CO., LTD.
    Inventors: Wataru Ueda, Toru Murayama, Ken Ooyachi, Wataru Ninomiya, Toshiya Yasukawa
  • Publication number: 20170129844
    Abstract: Provided is a method for producing isobutylene with a high selectivity by a dehydration reaction of isobutanol. There are provided a method for producing isobutylene by dehydration of isobutanol, in which the dehydration of isobutanol is performed in a state where at least one of an organic acid and an organic acid ester is present in a reaction system, and methods for producing methacrylic acid and methyl methacrylate from the obtained isobutylene.
    Type: Application
    Filed: June 26, 2015
    Publication date: May 11, 2017
    Applicant: MITSUBISHI RAYON CO., LTD.
    Inventors: Shuji AKIHARA, Tatsuya SUZUKI, Toshiya YASUKAWA, Akio TAKEDA, Kenichi MIYAKI, Ken OOYACHI
  • Publication number: 20170050896
    Abstract: The purpose of the present invention is to provide a method that can produce, with high yield or high selectivity isobutylene by means of isobutanol dehydration-reaction. An isobutylene production method of a first embodiment of the present invention is a method for producing isobutylene by means of isobutanol dehydration-reaction, wherein isobutanol is reacted using a catalyst for which the BET specific surface area is within the range of 60 m2/g-175 m2/g, and the reaction is carried out under a reaction pressure of 50 kPa-750 kPa as the absolute pressure. An isobutylene production method of a second embodiment of the present invention includes: using a catalyst which is filled into a reaction chamber and for which the particle diameters of at least 90 mass % of the catalyst are within the range of 700 ?m-1000 ?m; setting the isobutanol concentration within a supplied reaction gas to 30 vol %-85 vol %; setting the weight hourly velocity (WHSV) of the isobutanol to 0.
    Type: Application
    Filed: May 1, 2015
    Publication date: February 23, 2017
    Applicant: MITSUBISHI RAYON CO., LTD.
    Inventors: Toshiya YASUKAWA, Tatsuya SUZUKI, Akio TAKEDA, Wataru NINOMIYA, Kenichi MIYAKI, Ken OOYACHI, Shuji AKIHARA
  • Publication number: 20160340270
    Abstract: Provided are a catalyst whereby isobutylene can be produced at high yield in a lower-temperature environment, and a method for producing isobutylene using the catalyst. The catalyst for producing isobutylene is an oxide including at least one element selected from molybdenum and tungsten, and at least one element selected from tantalum, niobium, and titanium.
    Type: Application
    Filed: August 4, 2016
    Publication date: November 24, 2016
    Applicants: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY, MITSUBISHI RAYON CO., LTD.
    Inventors: Wataru UEDA, Toru MURAYAMA, Ken OOYACHI, Wataru NINOMIYA, Toshiya YASUKAWA
  • Patent number: 9393554
    Abstract: Provided is a method that produces a saturated aldehyde from a 1,2-alkanediol in high yield. Disclosed is a method for producing a saturated aldehyde from a 1,2-alkanediol in the presence of a regular mesoporous material.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: July 19, 2016
    Assignees: TOKUSHIMA UNIVERSITY, MITSUBISHI RAYON CO., LTD.
    Inventors: Shigeru Sugiyama, Yuuki Katou, Toshiya Yasukawa, Shuji Akihara, Wataru Ninomiya
  • Patent number: 9346735
    Abstract: A method for efficiently producing t-butanol as a raw material of a methacrylic resin from isobutanol is described, including a step (1) of dehydrating isobutanol to obtain butenes, and a step (2) of hydrating the butenes to obtain t-butanol. A method for producing methacrolein and methacrylic acid is also described, which further includes a step (3) of dehydrating and oxidizing the obtained t-butanol to obtain methacrolein and methacrylic acid. An apparatus for performing the steps (1) to (3) is also described.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: May 24, 2016
    Assignee: MITSUBISHI RAYON CO., LTD.
    Inventors: Ken Ooyachi, Toshiya Yasukawa, Shuji Akihara
  • Publication number: 20150343429
    Abstract: Provided is a method that produces a saturated aldehyde from a 1,2-alkanediol in high yield. Disclosed is a method for producing a saturated aldehyde from a 1,2-alkanediol in the presence of a regular mesoporous material.
    Type: Application
    Filed: February 4, 2014
    Publication date: December 3, 2015
    Applicant: MITSUBISHI RAYON CO., LTD.
    Inventors: Shigeru SUGIYAMA, Yuuki KATOU, Toshiya YASUKAWA, Shuji AKIHARA, Wataru NINOMIYA
  • Publication number: 20150202597
    Abstract: Provided are a catalyst whereby isobutylene can be produced at high yield in a lower-temperature environment, and a method for producing isobutylene using the catalyst. The catalyst for producing isobutylene is an oxide including at least one element selected from molybdenum and tungsten, and at least one element selected from tantalum, niobium, and titanium.
    Type: Application
    Filed: September 18, 2013
    Publication date: July 23, 2015
    Applicants: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY, MITSUBISHI RAYON CO., LTD.
    Inventors: Wataru Ueda, Toru Murayama, Ken Ooyachi, Wataru Ninomiya, Toshiya Yasukawa
  • Publication number: 20140357890
    Abstract: A method for efficiently producing t-butanol as a raw material of a methacrylic resin from isobutanol is described, including a step (1) of dehydrating isobutanol to obtain butenes, and a step (2) of hydrating the butenes to obtain t-butanol. A method for producing methacrolein and methacrylic acid is also described, which further includes a step (3) of dehydrating and oxidizing the obtained t-butanol to obtain methacrolein and methacrylic acid. An apparatus for performing the steps (1) to (3) is also described.
    Type: Application
    Filed: November 6, 2012
    Publication date: December 4, 2014
    Applicant: MITSUBISHI RAYON CO., LTD.
    Inventors: Ken Ooyachi, Toshiya Yasukawa, Shuji Akihara
  • Patent number: 8389760
    Abstract: Disclosed is a palladium-containing catalyst which enables to produce an ?,?-unsaturated carboxylic acid in high selectivity from an olefin or an ?,?-unsaturated aldehyde. Also disclosed are a method for producing such a catalyst and a method for producing an ?,?-unsaturated carboxylic acid using such a catalyst. Specifically disclosed is a palladium-containing catalyst containing 0.001 to 0.25 mole of antimony element to 1 mole of palladium element or a palladium-containing catalyst containing palladium element which composes a metal, tellurium element, and bismuth element.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: March 5, 2013
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Toshiya Yasukawa, Toshiki Matsui, Ken Ooyachi, Yoshiyuki Himeno, Wataru Ninomiya
  • Publication number: 20120053363
    Abstract: Disclosed is a palladium-containing catalyst which enables to produce an ?,?-unsaturated carboxylic acid in high selectivity from an olefin or an ?,?-unsaturated aldehyde. Also disclosed are a method for producing such a catalyst and a method for producing an ?,?-unsaturated carboxylic acid using such a catalyst. Specifically disclosed is a palladium-containing catalyst containing 0.001 to 0.25 mole of antimony element to 1 mole of palladium element or a palladium-containing catalyst containing palladium element which composes a metal, tellurium element, and bismuth element.
    Type: Application
    Filed: November 8, 2011
    Publication date: March 1, 2012
    Applicant: Mitsubishi Rayon Co., Ltd.
    Inventors: Toshiya YASUKAWA, Toshiki Matsui, Ken Ooyachi, Yoshiyuki Himeno, Wataru Ninomiya
  • Patent number: 8088945
    Abstract: Disclosed is a palladium-containing catalyst which enables to produce an ?,?-unsaturated carboxylic acid in high selectivity from an olefin or an ?,?-unsaturated aldehyde. Also disclosed are a method for producing such a catalyst and a method for producing an ?,?-unsaturated carboxylic acid using such a catalyst. Specifically disclosed is a palladium-containing catalyst containing 0.001 to 0.25 mole of antimony element to 1 mole of palladium element or a palladium-containing catalyst containing palladium element which composes a metal, tellurium element, and bismuth element.
    Type: Grant
    Filed: December 10, 2010
    Date of Patent: January 3, 2012
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Toshiya Yasukawa, Toshiki Matsui, Ken Ooyachi, Yoshiyuki Himeno, Wataru Ninomiya
  • Patent number: 7994091
    Abstract: Disclosed is a palladium-containing catalyst for producing an ?, ?-unsaturated carboxylic acid from an olefin or an ?, ?-unsaturated aldehyde in high productivity. Also disclosed are a method for producing such a catalyst, and a method for producing an ?, ?-unsaturated carboxylic acid in high productivity. Specifically, a palladium-containing catalyst is produced by a method containing a step in which palladium in an oxidation state is reduced by a compound (A) which is represented by the following formula (1).
    Type: Grant
    Filed: December 26, 2006
    Date of Patent: August 9, 2011
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Yoshiyuki Himeno, Ken Ooyachi, Toshiya Yasukawa
  • Publication number: 20110082315
    Abstract: Disclosed is a palladium-containing catalyst which enables to produce an ?,?-unsaturated carboxylic acid in high selectivity from an olefin or an ?,?-unsaturated aldehyde. Also disclosed are a method for producing such a catalyst and a method for producing an ?,?-unsaturated carboxylic acid using such a catalyst. Specifically disclosed is a palladium-containing catalyst containing 0.001 to 0.25 mole of antimony element to 1 mole of palladium element or a palladium-containing catalyst containing palladium element which composes a metal, tellurium element, and bismuth element.
    Type: Application
    Filed: December 10, 2010
    Publication date: April 7, 2011
    Applicant: Mitsubishi Rayon Co., Ltd.
    Inventors: Toshiya YASUKAWA, Toshiki Matsui, Ken Ooyachi, Yoshiyuki Himeno, Wataru Ninomiya
  • Publication number: 20100234639
    Abstract: Disclosed is a palladium-containing catalyst for producing an ?,?-unsaturated carboxylic acid from an olefin or an ?,?-unsaturated aldehyde in high productivity. Also disclosed are a method for producing such a catalyst, and a method for producing an ?,?-unsaturated carboxylic acid in high productivity. Specifically, a palladium-containing catalyst is produced by a method containing a step in which palladium in an oxidation state is reduced by a compound (A) which is represented by the following formula (1).
    Type: Application
    Filed: December 26, 2006
    Publication date: September 16, 2010
    Applicant: Mitsubishi Rayon Co., Ltd.
    Inventors: Yoshiyuki Himeno, Ken Ooyachi, Toshiya Yasukawa