Patents by Inventor Mamoru Seino

Mamoru Seino 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 dihydroxybenzene and diisopropylbenzendicarbinol
    Patent number: 7557252
    Abstract: A process for simultaneously producing a dihydroxybenzene and a diisopropylbenzene dicarbinol, which contains subjecting a diisopropylbenzene with an oxygen containing gas to obtain an oxidation reaction mixture containing a diisopropylbenzene dihydroperoxide and a diisopropylbenzene hydroxy hydroperoxide followed by an extraction separation step, a decomposition step, a distillation separation step, a reduction step and a post-treatment step in this order, the process containing purifying the diisopropylbenzene dicarbinol from the liquid containing the diisopropylbenzene dicarbinol obtained in the reduction step through purification operations containing crystallization, filtration and subsequent drying, and supplying a filtrate obtained by the filtration to the decomposition step and/or distillation separation step.
    Type: Grant
    Filed: February 12, 2007
    Date of Patent: July 7, 2009
    Assignee: Sumitomo Chemical Company, Limited
    Inventor: Mamoru Seino
  • PROCESS FOR PRODUCING DIHYDROXYBENZENE AND DIISOPROPYLBENZENDICARBINOL
    Publication number: 20070197838
    Abstract: A process for simultaneously producing a dihydroxybenzene and a diisopropylbenzene dicarbinol, which contains subjecting a diisopropylbenzene with an oxygen containing gas to obtain an oxidation reaction mixture containing a diisopropylbenzene dihydroperoxide and a diisopropylbenzene hydroxy hydroperoxide followed by an extraction separation step, a decomposition step, a distillation separation step, a reduction step and a post-treatment step in this order, the process containing purifying the diisopropylbenzene dicarbinol from the liquid containing the diisopropylbenzene dicarbinol obtained in the reduction step through purification operations containing crystallization, filtration and subsequent drying, and supplying a filtrate obtained by the filtration to the decomposition step and/or distillation separation step.
    Type: Application
    Filed: February 12, 2007
    Publication date: August 23, 2007
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventor: Mamoru SEINO
  • Method for treating tar
    Patent number: 6960698
    Abstract: A method for treating tar separated from a liquid containing an aromatic hydroxybenzene obtained by acidolysis of a liquid containing an aromatic hydroperoxide, which comprises dissolving the tar with an alkaline aqueous solution.
    Type: Grant
    Filed: March 20, 2003
    Date of Patent: November 1, 2005
    Assignee: Sumitomo Chemical Compnay, Limted
    Inventors: Mamoru Seino, Shigefumi Tokumasu
  • Method for treating tar
    Publication number: 20030183557
    Abstract: A method for treating tar separated from a liquid containing an aromatic hydroxybenzene obtained by acidolysis of a liquid containing an aromatic hydroperoxide, which comprises dissolving the tar with an alkaline aqueous solution.
    Type: Application
    Filed: March 20, 2003
    Publication date: October 2, 2003
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Mamoru Seino, Shigefumi Tokumasu