Patents Assigned to Nippon Steel Chem. Co., Ltd.
  • Process for distillation of styrenes
    Patent number: 4615769
    Abstract: The present invention provides a process for distillation of styrenes which can be stably operated without loss of energy saving effect, by leading a part or all of low boiling point component vapor from the top to a compressor to use as a heat source for a reboiler and returning the low boiling point components condensed in the reboiler or a mixture of the condensate and a part of the uncondensed vapor to a recycling line of a distillation column.
    Type: Grant
    Filed: April 25, 1985
    Date of Patent: October 7, 1986
    Assignees: Nippon Steel Chem. Co., Ltd., Hitachi, Ltd.
    Inventors: Tsukumo Horigome, Noriyuki Kawabe, Mamoru Takiue, Kunihiko Imai, Noriaki Uchiyama, Fusayuki Tsuzuki, Kenji Shimada, Masahiro Shibuya, Norimasa Hakutoh, Chiaki Watanabe, Junichi Abe