Patents by Inventor Miyuki Horiguchi

Miyuki Horiguchi 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 of producing lactic acid and polylactic acid
    Patent number: 10640445
    Abstract: A method of producing lactic acid includes filtering a lactic acid-containing aqueous solution through a nanofiltration membrane to recover an aqueous lactic acid solution from the permeate side (Step A); distilling the aqueous lactic acid solution to recover lactic acid from the vapor side (Step B); and crystallizing the lactic acid obtain in Step B, and performing solid-liquid separation to recover a lactic acid crystal(s) (Step C).
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: May 5, 2020
    Assignee: Toray Industries, Inc.
    Inventors: Kenji Kawamura, Miyuki Horiguchi, Satoshi Sakami, Katsushige Yamada
  • Lactic acid manufacturing method
    Patent number: 10501399
    Abstract: A method of producing lactic acid includes subjecting a lactic acid-containing solution to distillation to collect lactic acid from the vapor side (Step A); subjecting the lactic acid obtained in Step A to crystallization (Step B); subjecting the lactic acid slurry obtained in Step B to solid-liquid separation into lactic acid crystals and a mother liquor (Step C); and circulating the mother liquor obtained in Step C to Step B (Step D).
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: December 10, 2019
    Assignee: Toray Industries, Inc.
    Inventors: Kenji Kawamura, Miyuki Horiguchi, Satoshi Sakami, Katsushige Yamada
  • LACTIC ACID MANUFACTURING METHOD
    Publication number: 20170152204
    Abstract: A method of producing lactic acid includes subjecting a lactic acid-containing solution to distillation to collect lactic acid from the vapor side (Step A); subjecting the lactic acid obtained in Step A to crystallization (Step B); subjecting the lactic acid slurry obtained in Step B to solid-liquid separation into lactic acid crystals and a mother liquor (Step C); and circulating the mother liquor obtained in Step C to Step B (Step D).
    Type: Application
    Filed: March 30, 2015
    Publication date: June 1, 2017
    Inventors: Kenji Kawamura, Miyuki Horiguchi, Satoshi Sakami, Katsushige Yamada
  • METHOD OF PRODUCING LACTIC ACID AND POLYLACTIC ACID
    Publication number: 20160207868
    Abstract: A method of producing lactic acid includes filtering a lactic acid-containing aqueous solution through a nanofiltration membrane to recover an aqueous lactic acid solution from the permeate side (Step A); distilling the aqueous lactic acid solution to recover lactic acid from the vapor side (Step B); and crystallizing the lactic acid obtain in Step B, and performing solid-liquid separation to recover a lactic acid crystal(s) (Step C).
    Type: Application
    Filed: September 5, 2014
    Publication date: July 21, 2016
    Inventors: Kenji Kawamura, Miyuki Horiguchi, Satoshi Sakami, Katsushige Yamada
  • METHOD FOR PRODUCING LACTATE
    Publication number: 20140012041
    Abstract: A method produces a lactic acid salt and includes subjecting an aqueous lactic acid salt solution comprising a formic acid salt in an amount of not less than 7.0% by weight with respect to the lactic acid salt to crystallization, and recovering the lactic acid salt. By subjecting the aqueous lactic acid salt solution including a formic acid salt in an amount of not less than 7.0% by weight with respect to the lactic acid salt to crystallization, supersaturation of the lactic acid salt can be stabilized, and the recovery of the lactic acid salt can be increased.
    Type: Application
    Filed: December 12, 2011
    Publication date: January 9, 2014
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Miyuki Horiguchi, Masateru Ito, Takeshi Munegumi, Katsushige Yamada