Patents Assigned to Koichi Asano
  • Method and device for separation and concentration by evaporation of mixture with separation factor of approx. 1
    Patent number: 7297237
    Abstract: By using a dephlegmator which conducts distillation concurrently with heat exchange within at least one distillation column, or a portion of one distillation column, of a distillation cascade, the quantity of liquid holdup within the distillation apparatus is reduced and the start-up time is shortened. Consequently, the operational costs associated with startup are reduced, and productivity is improved markedly.
    Type: Grant
    Filed: November 22, 2001
    Date of Patent: November 20, 2007
    Assignees: Koichi Asano, Taiyo Nippon Sanso Corporation
    Inventors: Koichi Asano, Shigeru Hayashida, Nobuaki Egoshi, Hiroshi Kawakami