Patents by Inventor Norimasa Mizui

Norimasa Mizui 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).

  • Process for producing benzyl acetate and benzyl alcohol
    Patent number: 6057482
    Abstract: Benzyl alcohol of high purity is produced by supplying benzyl acetate, water and acetic acid to a hydrolysis reactor packed with a solid acid catalyst. The liquid reaction mixture produced, which contains benzyl acetate, water, benzyl alcohol and acetic acid, is supplied to an acetic acid-water recovery column, Benzyl alcohol and benzyl acetate are recovered while acetic acid is removed and returned to the hydrolysis reactor.
    Type: Grant
    Filed: November 9, 1998
    Date of Patent: May 2, 2000
    Assignee: Tosoh Corporation
    Inventors: Takashi Okada, Makoto Hanaya, Akitaka Hattori, Takanori Miyake, Nobuo Nagira, Shunya Ikumi, Takashi Hori, Norimasa Mizui
  • Process for producing benzyl acetate and benzyl alcohol
    Patent number: 5883290
    Abstract: The present invention relates to a process for producing benzyl acetate and benzyl alcohol.Benzyl acetate itself is useful as a solvent and a perfume. Benzyl alcohol which is derived from the benzyl acetate by hydrolysis or by transesterification with methanol is an important compound useful as a powerful solvent, a nontoxic medical additive, and an intermediate compound for agricultural chemicals and medicines.
    Type: Grant
    Filed: December 4, 1996
    Date of Patent: March 16, 1999
    Assignee: Tosoh Corporation
    Inventors: Takashi Okada, Makoto Hanaya, Akitaka Hattori, Hideyuki Hamaji, Takanori Miyake, Seiichi Tokumaru, Nobuo Nagira, Shunya Ikumi, Takashi Hori, Norimasa Mizui
  • Process for producing polyethylenepolyamine
    Patent number: 4980507
    Abstract: A process for producing polyethylenepolyamine from ethylene dichloride and aqueous ammonia which comprises reacting ethylene dichloride with ammonia, and then continuing the reaction in the presence of at least one kind of amine when the overall conversion of ethylene dichloride has become 25 to 85%.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: December 25, 1990
    Assignee: Tosoh Corporation
    Inventors: Norimasa Mizui, Keiji Mitarai, Yukihiro Tsutsumi