Patents Assigned to Asaka Riken Co., Ltd.
  • Patent number: 11117114
    Abstract: A lithium carbonate production device is provided which can efficiently produce lithium carbonate without requiring a large pressure for supplying carbon dioxide gas, by a simple structure. A lithium carbonate production device (1) includes: a sealed reaction tank (2) which stores a lithium hydroxide aqueous solution A; a supply unit (3) for the lithium hydroxide aqueous solution; a carbon dioxide gas supply unit (4); a circulation unit (21) for the lithium hydroxide aqueous solution; and a nozzle which is provided at the head of the circulation unit (21) for the lithium hydroxide aqueous solution, and has a diameter which gradually decreases from a base end side to a head side.
    Type: Grant
    Filed: June 10, 2019
    Date of Patent: September 14, 2021
    Assignee: Asaka Riken Co., Ltd.
    Inventor: Yukio Sakuma
  • Patent number: 10480048
    Abstract: A method is provided which can separate rhenium from a solution containing rhenium by a simple procedure in a shorter time. A method of selectively recovering rhenium from a solution containing rhenium and one or more different metals is also provided. A method of recovering rhenium is used. The method involves (A) adding an electron donor (aliphatic secondary alcohol or aliphatic secondary thioalcohol) and a ketone compound to a solution containing perrhenate ions, (B) irradiating the solution after the addition step with ultraviolet light to precipitate a reduced species of the perrhenate ions contained in the solution, and (C) separating the reduced species of perrhenate ions from the solution, the reduced species being precipitated during the ultraviolet light irradiation.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: November 19, 2019
    Assignees: KANAGAWA UNIVERSITY, ASAKA RIKEN CO., LTD.
    Inventor: Hisao Hori
  • Patent number: 8999447
    Abstract: A method for manufacturing soil-resistant glass the surface of which is covered with a coating film having a high hardness, and the soil-resistant glass are provided. A coating film comprising titania or/and titania-silica is formed by coating a glass surface with a photocatalyst solution comprising the titania or/and the titania-silica each having a photocatalytic function and heating the applied photocatalyst solution at a temperature higher than at least 100° C. The heating temperature may be a temperature higher than 100° C. and 300° C. or lower. The time of heating at the above-mentioned temperature may be at least 2 minutes or longer.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: April 7, 2015
    Assignee: Asaka Riken Co., Ltd.
    Inventors: Yoshihiro Morito, Katsuyuki Sasazaki, Katsuyuki Nakano, Etsuo Nomura
  • Patent number: 7857888
    Abstract: A method for separation and recovery of noble metals which makes it possible to isolate noble metal components efficiently by easy operation, that is, a method which comprises passing a solution of metals in hydrochloric acid prepared by treating a metal material with hydrochloric acid through the first cellulose column, eluting through development the noble metal component adsorbed on the cellulose with a hydrochloric acid/2-propanone mixture to obtain a fraction containing light platinum-group metals and a fraction containing heavy platinum-group metals and gold, separating the former fraction with the above mixture into fractions containing palladium, ruthenium and rhodium respectively, passing the fraction containing heavy platinum-group metals and gold through the second cellulose column to made them adsorbed on the cellulose, eluting them from the cellulose with a hydrochloric acid/1-butanol mixture to obtain fractions containing gold, osmium, iridium and platinum respectively, and recovering the noble
    Type: Grant
    Filed: January 12, 2007
    Date of Patent: December 28, 2010
    Assignees: Asaka Riken Co., Ltd.
    Inventors: Kazuhiro Niisawa, Kazuo Shimizu, Tadashi Nozaki
  • Publication number: 20100224029
    Abstract: A method for separation and recovery of noble metals which makes it possible to isolate noble metal components efficiently by easy operation, that is, a method which comprises passing a solution of metals in hydrochloric acid prepared by treating a metal material with hydrochloric acid through the first cellulose column, eluting through development the noble metal component adsorbed on the cellulose with a hydrochloric acid/2-propanone mixture to obtain a fraction containing light platinum-group metals and a fraction containing heavy platinum-group metals and gold, separating the former fraction with the above mixture into fractions containing palladium, ruthenium and rhodium respectively, passing the fraction containing heavy platinum-group metals and gold through the second cellulose column to made them adsorbed on the cellulose, eluting them from the cellulose with a hydrochloric acid/1-butanol mixture to obtain fractions containing gold, osmium, iridium and platinum respectively, and recovering the noble
    Type: Application
    Filed: January 12, 2007
    Publication date: September 9, 2010
    Applicants: ASAKA RIKEN CO., LTD.
    Inventors: Kazuhiro Niisawa, Kazuo Shimizu, Tadashi Nozaki