Patents by Inventor Seiji FUTAMURA

Seiji FUTAMURA 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).

  • 1,3-butadiene separation and recovery method and 1,3-butadiene separation and recovery apparatus
    Patent number: 10815172
    Abstract: Disclosed is a 1,3-butadiene separation and recovery method which can reduce the amount of 1,3-butadiene polymer produced when 1,3-butadiene is separated and recovered from a mixed fluid containing 1,3-butadiene. The method includes an extractive distillation step of performing extractive distillation of the mixed fluid to obtain a fraction containing crude 1,3-butadiene, and a dividing wall distillation step of performing dividing wall distillation of the fraction containing crude 1,3-butadiene to obtain a fraction containing an impurity having a higher boiling point than 1,3-butadiene, a fraction containing an impurity having a lower boiling point than 1,3-butadiene, and a fraction containing high-purity 1,3-butadiene.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: October 27, 2020
    Assignee: ZEON CORPORATION
    Inventors: Masanobu Kanauchi, Seiji Futamura, Kenichi Otsubo
  • 1,3-BUTADIENE SEPARATION AND RECOVERY METHOD AND 1,3-BUTADIENE SEPARATION AND RECOVERY APPARATUS
    Publication number: 20190337871
    Abstract: Disclosed is a 1,3-butadiene separation and recovery method which can reduce the amount of 1,3-butadiene polymer produced when 1,3-butadiene is separated and recovered from a mixed fluid containing 1,3-butadiene. The method includes an extractive distillation step of performing extractive distillation of the mixed fluid to obtain a fraction containing crude 1,3-butadiene, and a dividing wall distillation step of performing dividing wall distillation of the fraction containing crude 1,3-butadiene to obtain a fraction containing an impurity having a higher boiling point than 1,3-butadiene, a fraction containing an impurity having a lower boiling point than 1,3-butadiene, and a fraction containing high-purity 1,3-butadiene.
    Type: Application
    Filed: January 25, 2018
    Publication date: November 7, 2019
    Applicant: ZEON CORPORATION
    Inventors: Masanobu KANAUCHI, Seiji FUTAMURA, Kenichi OTSUBO