Patents by Inventor Mitsuaki Yoshimitsu

Mitsuaki Yoshimitsu 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: 10556802
    Abstract: Provided is a method for producing an AEI zeolite without the use of a zeolite Y and a raw material containing fluorine and phosphorus, the method including a crystallization step of crystallizing a composition containing a structure directing agent, a sodium source, water, and a zeolite having at least one of the following structures as a silica alumina source.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: February 11, 2020
    Assignee: TOSOH CORPORATION
    Inventors: Yasuyuki Takamitsu, Tomoya Ishikawa, Mitsuaki Yoshimitsu
  • Patent number: 10513439
    Abstract: Provided is a production method by which an AEI zeolite is obtained without inducing a structural transformation in a crystalline aluminosilicate having a Y-structure and without using fluorine or phosphorus, the method including a crystallization step of crystallizing a composition containing an alumina source, a silica source, a structure directing agent, a sodium source, and water, a weight proportion of crystalline aluminosilicate relative to a total weight of the alumina source and the silica source being from 0 wt. % to 10 wt. %, and the crystallization step satisfying at least one of the following conditions: a molar ratio of hydroxide ion to silica in the composition is 0.45 or greater, the composition contains a cation represented by (CH3)3RN+ (R represents an alkyl group having from 1 to 4 carbons, and the alkyl group may contain at least one substituent), and the crystallization time is 80 hours or longer.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: December 24, 2019
    Assignee: TOSOH CORPORATION
    Inventors: Tomoya Ishikawa, Hidekazu Aoyama, Mitsuaki Yoshimitsu, Seiji Maehama, Takayoshi Mishima, Yasuyuki Takamitsu
  • Publication number: 20190009257
    Abstract: Provided is a method for producing an AEI zeolite without the use of a zeolite Y and a raw material containing fluorine and phosphorus, the method including a crystallization step of crystallizing a composition containing a structure directing agent, a sodium source, water, and a zeolite having at least one of the following structures as a silica alumina source.
    Type: Application
    Filed: August 26, 2016
    Publication date: January 10, 2019
    Applicant: TOSOH CORPORATION
    Inventors: Yasuyuki TAKAMITSU, Tomoya ISHIKAWA, Mitsuaki YOSHIMITSU
  • Publication number: 20180230017
    Abstract: Provided is a production method by which an AEI zeolite is obtained without inducing a structural transformation in a crystalline aluminosilicate having a Y-structure and without using fluorine or phosphorus, the method including a crystallization step of crystallizing a composition containing an alumina source, a silica source, a structure directing agent, a sodium source, and water, a weight proportion of crystalline aluminosilicate relative to a total weight of the alumina source and the silica source being from 0 wt. % to 10 wt. %, and the crystallization step satisfying at least one of the following conditions: a molar ratio of hydroxide ion to silica in the composition is 0.45 or greater, the composition contains a cation represented by (CH3)3RN+ (R represents an alkyl group having from 1 to 4 carbons, and the alkyl group may contain at least one substituent), and the crystallization time is 80 hours or longer.
    Type: Application
    Filed: August 9, 2016
    Publication date: August 16, 2018
    Applicant: TOSOH CORPORATION
    Inventors: Tomoya ISHIKAWA, Hidekazu AOYAMA, Mitsuaki YOSHIMITSU, Seiji MAEHAMA, Takayoshi MISHIMA, Yasuyuki TAKAMITSU
  • Patent number: 4731493
    Abstract: Process for producing condensed bromoacenaphthylene comprising:(A) a step of brominating and condensating acenaphthene with bromine in a halogenated hydrocarbon solvent in the presence of a Lewis acid catalyst;(B) a step of removing the Lewis acid catalyst and then continuing the bromination with bromine with an added radical initiator; and(C) a step of carrying out dehydrobromination reaction.In a modified process, the bromination is effected in a halogenated hydrocarbon solvent at a temperature not lower than 60.degree. C. using bromine at least 3 times as much in moles as acenaphthene in the presence of an iron catalyst.Further, the condensed bromoacenaphthylene is purified by bringing it into contact with an adsorbent in an organic solvent.
    Type: Grant
    Filed: January 16, 1986
    Date of Patent: March 15, 1988
    Assignee: Toyo Soda Manufacturing Co., Ltd.
    Inventors: Masashige Kubo, Mitsuaki Yoshimitsu, Yukihiro Tsutsumi
  • Patent number: 4393246
    Abstract: A side chain of m-phenoxytoluene is brominated with a polyhalogenated ethane having the formula ##STR1## wherein W and Z respectively represent Cl or Br and X and Y respectively represent Cl, Br or H, as a brominating agent in a liquid phase in the presence of an amorphous carbon.
    Type: Grant
    Filed: October 29, 1981
    Date of Patent: July 12, 1983
    Assignee: Toyo Soda Manufacturing Co., Ltd.
    Inventors: Masashige Kubo, Mitsuaki Yoshimitsu, Kanzi Katsuragawa