Patents by Inventor Hideaki Kakimoto

Hideaki Kakimoto 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).

  • Method for reproducing lithium sulfide and method for producing polyarylene sulfide
    Publication number: 20050118093
    Abstract: A method for reproducing lithium sulfide, including the steps of reacting lithium halide generated as a byproduct during the production of a polyarylene sulfide by a reaction between lithium sulfide and a halogenated aromatic compound with sodium carbonate to generate lithium sulfide, isolating the lithium carbonate and reacting the lithium carbonate with a sulfur compound to generate the lithium sulfide. According to the above method, lithium sulfide having a less Na content can be reproduced from lithium halide generated as a byproduct during the production of a polyarylene sulfide.
    Type: Application
    Filed: December 17, 2002
    Publication date: June 2, 2005
    Applicant: Idemitsu Petrochemical Co., Ltd
    Inventors: Minoru Senga, Junji Matsui, Hideaki Kakimoto