Patents by Inventor Makiko Tachikura

Makiko Tachikura 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 bisphenol compound
    Patent number: 8445731
    Abstract: Provided is a process for producing a bisphenol compound stably at a high conversion and with high selectivity over a long period. A process for producing a bisphenol compound by feeding a phenol compound and a carbonyl compound continuously to a reactor packed with an acid catalyst, characterized in that the acid catalyst is a sulfonic-acid-form cation-exchange resin in which part of the sulfo groups have been modified with at least any one of 2-pyridylalkanethiol compounds and 3-pyridylalkanethiol compounds.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: May 21, 2013
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Susumu Tsutsuminai, Kazuaki Kanno, Makiko Tachikura
  • PROCESS FOR PRODUCING BISPHENOL COMPOUND
    Publication number: 20120010434
    Abstract: Provided is a process for producing a bisphenol compound stably at a high conversion and with high selectivity over a long period. A process for producing a bisphenol compound by feeding a phenol compound and a carbonyl compound continuously to a reactor packed with an acid catalyst, characterized in that the acid catalyst is a sulfonic-acid-form cation-exchange resin in which part of the sulfo groups have been modified with at least any one of 2-pyridylalkanethiol compounds and 3-pyridylalkanethiol compounds.
    Type: Application
    Filed: July 20, 2011
    Publication date: January 12, 2012
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Susumu Tsutsuminai, Kazuaki Kanno, Makiko Tachikura