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: 10550046Abstract: 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: GrantFiled: April 20, 2016Date of Patent: February 4, 2020Assignee: Mitsubishi Chemical CorporationInventors: Tatsuya Suzuki, Akio Takeda, Toshiya Yasukawa, Wataru Ninomiya, Ken Ooyachi
-
Patent number: 10464860Abstract: 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: GrantFiled: May 1, 2015Date of Patent: November 5, 2019Assignee: Mitsubishi Chemical CorporationInventors: Toshiya Yasukawa, Tatsuya Suzuki, Akio Takeda, Wataru Ninomiya, Kenichi Miyaki, Ken Ooyachi, Shuji Akihara
-
Publication number: 20180072636Abstract: 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: ApplicationFiled: April 20, 2016Publication date: March 15, 2018Applicant: Mitsubishi Chemical CorporationInventors: Tatsuya SUZUKI, Akio TAKEDA, Toshiya YASUKAWA, Wataru NINOMIYA, Ken OOYACHI
-
Patent number: 9840453Abstract: 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: GrantFiled: June 26, 2015Date of Patent: December 12, 2017Assignee: Mitsubishi Chemical CorporationInventors: Shuji Akihara, Tatsuya Suzuki, Toshiya Yasukawa, Akio Takeda, Kenichi Miyaki, Ken Ooyachi
-
Patent number: 9815748Abstract: 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: GrantFiled: August 4, 2016Date of Patent: November 14, 2017Assignees: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY, Mitsubishi Chemical CorporationInventors: Wataru Ueda, Toru Murayama, Ken Ooyachi, Wataru Ninomiya, Toshiya Yasukawa
-
Patent number: 9670111Abstract: 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: GrantFiled: September 18, 2013Date of Patent: June 6, 2017Assignees: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY, MITSUBISHI RAYON CO., LTD.Inventors: Wataru Ueda, Toru Murayama, Ken Ooyachi, Wataru Ninomiya, Toshiya Yasukawa
-
Publication number: 20170129844Abstract: 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: ApplicationFiled: June 26, 2015Publication date: May 11, 2017Applicant: MITSUBISHI RAYON CO., LTD.Inventors: Shuji AKIHARA, Tatsuya SUZUKI, Toshiya YASUKAWA, Akio TAKEDA, Kenichi MIYAKI, Ken OOYACHI
-
Publication number: 20170050896Abstract: 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: ApplicationFiled: May 1, 2015Publication date: February 23, 2017Applicant: MITSUBISHI RAYON CO., LTD.Inventors: Toshiya YASUKAWA, Tatsuya SUZUKI, Akio TAKEDA, Wataru NINOMIYA, Kenichi MIYAKI, Ken OOYACHI, Shuji AKIHARA
-
Publication number: 20160340270Abstract: 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: ApplicationFiled: August 4, 2016Publication date: November 24, 2016Applicants: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY, MITSUBISHI RAYON CO., LTD.Inventors: Wataru UEDA, Toru MURAYAMA, Ken OOYACHI, Wataru NINOMIYA, Toshiya YASUKAWA
-
Patent number: 9393554Abstract: 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: GrantFiled: February 4, 2014Date of Patent: July 19, 2016Assignees: TOKUSHIMA UNIVERSITY, MITSUBISHI RAYON CO., LTD.Inventors: Shigeru Sugiyama, Yuuki Katou, Toshiya Yasukawa, Shuji Akihara, Wataru Ninomiya
-
Patent number: 9346735Abstract: 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: GrantFiled: November 6, 2012Date of Patent: May 24, 2016Assignee: MITSUBISHI RAYON CO., LTD.Inventors: Ken Ooyachi, Toshiya Yasukawa, Shuji Akihara
-
Publication number: 20150343429Abstract: 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: ApplicationFiled: February 4, 2014Publication date: December 3, 2015Applicant: MITSUBISHI RAYON CO., LTD.Inventors: Shigeru SUGIYAMA, Yuuki KATOU, Toshiya YASUKAWA, Shuji AKIHARA, Wataru NINOMIYA
-
Publication number: 20150202597Abstract: 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: ApplicationFiled: September 18, 2013Publication date: July 23, 2015Applicants: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY, MITSUBISHI RAYON CO., LTD.Inventors: Wataru Ueda, Toru Murayama, Ken Ooyachi, Wataru Ninomiya, Toshiya Yasukawa
-
Publication number: 20140357890Abstract: 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: ApplicationFiled: November 6, 2012Publication date: December 4, 2014Applicant: MITSUBISHI RAYON CO., LTD.Inventors: Ken Ooyachi, Toshiya Yasukawa, Shuji Akihara
-
Patent number: 8389760Abstract: 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: GrantFiled: November 8, 2011Date of Patent: March 5, 2013Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Toshiya Yasukawa, Toshiki Matsui, Ken Ooyachi, Yoshiyuki Himeno, Wataru Ninomiya
-
Publication number: 20120053363Abstract: 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: ApplicationFiled: November 8, 2011Publication date: March 1, 2012Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Toshiya YASUKAWA, Toshiki Matsui, Ken Ooyachi, Yoshiyuki Himeno, Wataru Ninomiya
-
Patent number: 8088945Abstract: 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: GrantFiled: December 10, 2010Date of Patent: January 3, 2012Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Toshiya Yasukawa, Toshiki Matsui, Ken Ooyachi, Yoshiyuki Himeno, Wataru Ninomiya
-
Patent number: 7994091Abstract: 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: GrantFiled: December 26, 2006Date of Patent: August 9, 2011Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Yoshiyuki Himeno, Ken Ooyachi, Toshiya Yasukawa
-
Publication number: 20110082315Abstract: 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: ApplicationFiled: December 10, 2010Publication date: April 7, 2011Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Toshiya YASUKAWA, Toshiki Matsui, Ken Ooyachi, Yoshiyuki Himeno, Wataru Ninomiya
-
Publication number: 20100234639Abstract: 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: ApplicationFiled: December 26, 2006Publication date: September 16, 2010Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Yoshiyuki Himeno, Ken Ooyachi, Toshiya Yasukawa