Patents by Inventor Hatuhide Itoh

Hatuhide Itoh 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 continuous production of epichlorohydrin
    Patent number: 4113746
    Abstract: A process for continuously producing epichlorohydrin which comprises reacting chlorine and allyl chloride in an aqueous medium, neutralizing and saponifying the resulting hydrochloric acid-acidified solution containing glycerol dichlorohydrin with an alkali to form a solution containing epichlorohydrin, and separating epichlorohydrin from the resulting solution; wherein(1) the neutralization and saponification are performed in separately provided neutralization and saponification zones,(2) a slurry containing mainly calcium carbonate and calcium hydroxide is separated from the residual slurry left after the separation of epichlorohydrin, and(3) the neutralization and saponification reactions are carried out while recycling the separated slurry containing calcium carbonate and calcium hydroxide into the neutralization zone.
    Type: Grant
    Filed: December 8, 1976
    Date of Patent: September 12, 1978
    Assignee: Osaka Soda Co., Ltd.
    Inventors: Takamasa Kawabe, Masaaki Kadoma, Kazuyoshi Murakami, Hatuhide Itoh