Patents Assigned to Tokuyama Corporation
  • Publication number: 20210309942
    Abstract: A method for producing a quaternary alkylammonium hypochlorite solution, includes a preparation step of preparing a quaternary alkylammonium hydroxide solution, and a reaction step of bringing the quaternary alkylammonium hydroxide solution into contact with chlorine, wherein a carbon dioxide concentration in a gas phase portion in the reaction step is 100 ppm by volume or less, and pH of a liquid phase portion in the reaction step is 10.5 or more.
    Type: Application
    Filed: May 20, 2019
    Publication date: October 7, 2021
    Applicant: Tokuyama Corporation
    Inventors: Takafumi Shimoda, Yuki Kikkawa, Takayuki Negishi, Seiji Tono
  • Publication number: 20210292641
    Abstract: The present invention relates to a photochromic compound including a polyvalent residue on which at least one group having a photochromic moiety is substituted, and at least one long-chain group not containing a photochromic moiety and having a molecular weight of 300 or more is further substituted; and a curable composition containing the same. In accordance with the present invention, it is possible to provide a photochromic compound which has high solubility in a polymerizable compound serving as a matrix while retaining high photochromic characteristics and is hardly affected by the matrix; and a curable composition containing the same.
    Type: Application
    Filed: July 18, 2019
    Publication date: September 23, 2021
    Applicant: TOKUYAMA CORPORATION
    Inventors: Takao NOGUCHI, Junji TAKENAKA, Junji MOMODA, Takayoshi KAWASAKI, Yasutomo SHIMIZU, Masayuki MIYAZAKI
  • Publication number: 20210284541
    Abstract: Provided are silicon fine particles that are effectively prevented from being oxidized and have a crystallite diameter close to that of an amorphous substance. The silicon fine particles of the present invention have an average diameter of primary particles of 30 to 900 nm, a crystallite diameter of less than 10 nm, a chlorine concentration of 1 to 10% by mass, and a ratio (Co/S) of an oxygen concentration (Co: % by mass) to a specific surface area (S: m2/g) of less than 0.05. The method for producing silicon fine particles of the present invention includes: heating a gas containing trichlorosilane to a temperature of 600 to 950° C. in a reactor and thermally decomposing the trichlorosilane to produce a silicon fine particle precursor containing chlorine, then collecting the silicon fine particle precursor, and then heating and dechlorinating the collected silicon fine particle precursor at a temperature of 750 to 900° C. under supply of an inert gas or under reduced pressure.
    Type: Application
    Filed: May 15, 2019
    Publication date: September 16, 2021
    Applicant: Tokuyama Corporation
    Inventors: Naoto MOCHIZUKJ, Haruyuki ISHIDA, Masao ARIYUKI, Koji FUKUHARA
  • Publication number: 20210262101
    Abstract: A gas production apparatus including: an electrolysis vessel; first and second electrolyte circulation systems; and an electrolyte exchanger, the first/second electrolyte circulation system including: a first/second circulation tank receiving and storing a first/second electrolyte flowing out from an anode chamber/a cathode chamber; and a first/second circulation pump supplying the first/second electrolyte to the anode chamber/the cathode chamber, the electrolyte exchanger transferring part of the first electrolyte existing in the first electrolyte circulation system into the second electrolyte circulation system on one hand, and transferring part of the second electrolyte existing in the second electrolyte circulation system into the first electrolyte circulation system on the other hand.
    Type: Application
    Filed: July 18, 2019
    Publication date: August 26, 2021
    Applicant: TOKUYAMA CORPORATION
    Inventors: Yasuyuki TANAKA, Yoshikazu KODAMA, Daisuke MATSUNAGA
  • Patent number: 11097948
    Abstract: To provide an aluminum nitride particle having a hexagonal columnar barrel part and bowl-like projection parts at both ends of the columnar part, wherein the long diameter (D) of the barrel part is 10 to 250 ?m, the ratio (L1/D) of the distance (L1) between the apexes of the two projection pars to the long diameter (D) of the barrel part is 0.7 to 1.3, and the percentage of the length or thickness (L2) of the barrel part to the distance (L1) between the apexes of the two projection parts is 10 to 60%. The aluminum nitride particle can provide high heat conductivity and excellent electric insulation to a resin when it is filled into the resin.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: August 24, 2021
    Assignee: TOKUYAMA CORPORATION
    Inventors: Akimasa Kuramoto, Kikuo Yamamoto, Mou Ou, Saiko Fujii, Yukihiro Kanechika, Teruhiko Nawata
  • Publication number: 20210253541
    Abstract: Provided is a method for industrially producing a triazolidinedione compound at a high purity and a high yield. A precipitation step for preparing a solution that contains a triazolidinedione compound represented by formula (1) and precipitating the triazolidinedione compound therefrom is performed. In this step, the pH of the solution is adjusted to 3.0 to 8.5 and the solution is prepared so as to contain 3-15 parts by volume of solvents for 1 part by mass of the triazolidinedione compound. (In the formula, R1 is a substituted or unsubstituted amino group-bearing organic group.
    Type: Application
    Filed: June 11, 2019
    Publication date: August 19, 2021
    Applicants: TOKUYAMA CORPORATION, JEOL Ltd.
    Inventors: Makoto SATOU, Misao MATSUSHIGE, Seketsu FUKUZAWA, Masaki TAKIWAKI
  • Publication number: 20210252568
    Abstract: A method of recovering the fly ash, including the firing step in which the raw fly ash powder containing the unburned carbon is fired to remove the unburned carbon by burning, characterized by further including the step of measuring the content of unburned carbon in the raw fly ash powder; and the sieve-classifying step of obtaining a fine fly ash powder which is the component under the sieve and has a decreased content of unburned carbon as a result of sieve-classifying the raw fly ash powder; wherein the perforation size of the sieve used in the sieve-classifying step is set depending upon the content of unburned carbon in the raw fly ash powder, the sieve having a small perforation size being used when the content of unburned carbon is large and the sieve having a large perforation size being used when the content of unburned carbon is small; and the fine fly ash powder which is the component under the sieve is recovered through the firing step.
    Type: Application
    Filed: June 4, 2019
    Publication date: August 19, 2021
    Applicant: TOKUYAMA CORPORATION
    Inventors: Kohei OMURA, Takuya SEKI
  • Publication number: 20210253587
    Abstract: Provided are a stable triazolinedione adduct, a method for producing the same, a method for producing an ene compound, and a method for analyzing an ene compound. A triazolinedione adduct that is stable until the time of use and can be reacted while reverting to a triazolinedione compound at the time of use. Specifically, a triazolinedione adduct represented by formula (1). (In the formula, R1 is an organic group, and A is a fused ring of three or more rings including at least one aromatic ring.
    Type: Application
    Filed: June 11, 2019
    Publication date: August 19, 2021
    Applicants: TOKUYAMA CORPORATION, JEOL Ltd.
    Inventors: Masahiko SEKI, Seketsu FUKUZAWA, Masaki TAKIWAKI
  • Patent number: 11091371
    Abstract: A boron structure body includes boron having each concentration of Ti, Al, Fe, Cr, Ni, Co, Cu, W, Ta, Mo and Nb being 0.1 ppmw or less and having a thickness of 0.8 to 5 mm. The boron structure body may have a tubular shape, and when used as a doping agent, a ratio of 11B that is an isotope may be 95 mass % or more. The boron structure body can be easily crushed, and a high-purity boron powder having an average particle diameter of 0.5 to 3 mm and having each metal impurity concentration of 0.3 ppmw or less can be obtained.
    Type: Grant
    Filed: October 12, 2018
    Date of Patent: August 17, 2021
    Assignee: Tokuyama Corporation
    Inventors: Junya Sakai, Tomohiro Yamamato, Yuuki Yoshioka, Shouji Fujii
  • Publication number: 20210238089
    Abstract: A process for reforming the fly ash by heating a raw fly ash powder that contains the unburned carbon and thereby decreasing the content of the unburned carbon, characterized in that (a) as means for heating the raw fly ash powder, use is made of a heating unit that heats the raw fly ash powder by passing it through a heated medium-fluidized bed, (b) a high-temperature gas stream is passed through the heating unit to form the heated medium-fluidized bed and to fluidize and convey the raw fly ash powder that is thrown into the medium-fluidized bed, (c) the flow rate of the high-temperature gas stream is so set that the raw fly ash powder thrown into the heating unit is all heated in the medium-fluidized bed and is taken out from a take-out port provided at an upper part of the heating unit but that the particulate medium forming the medium-fluidized bed is not discharged from the take-out port, (d) the fly ash powder after heated and discharged from the take-out port of the heating unit is introduced into an a
    Type: Application
    Filed: February 13, 2020
    Publication date: August 5, 2021
    Applicant: TOKUYAMA CORPORATION
    Inventors: Kohei OMURA, Takuya SEKI
  • Patent number: 11071961
    Abstract: To provide a fluidized-bed reaction vessel and a trichlorosilane production method each of which can reduce corrosion and wear of a reaction container inner wall, a fluidized-bed reaction vessel causes metallurgical grade silicon powder and hydrogen chloride gas to react with each other for production of trichlorosilane. The fluidized-bed reaction vessel includes a plurality of ejection nozzles (20) standing on a distributor plate (11) as a bottom surface of a container body. The ejection nozzles (20) each have a gas ejection opening (22a) configured to allow hydrogen chloride gas to be ejected sideways. The plurality of ejection nozzles (20) include a first ejection nozzle (20a) adjacent to an outer wall (10a) of the container body, the first ejection nozzle (20a) having a gas ejection opening (22a) in such a pattern as to prevent hydrogen chloride gas from being ejected toward the outer wall (10a).
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: July 27, 2021
    Assignee: TOKUYAMA CORPORATION
    Inventors: Kenji Hirota, Katsuya Ogihara
  • Publication number: 20210221745
    Abstract: The present invention aims to provide a method for producing granules for ceramic production, the method having high productivity and making it possible to obtain a ceramic which, when produced by press molding the granules and firing the resulting press molded product, has physical properties kept from lowering. The present invention is characterized by including: a slurry preparation step of preparing a slurry including a mixture containing a powder of an inorganic compound, a binder, and a solvent; a granulation step of introducing the slurry into a spray drying device to form a granulated substance containing the inorganic compound; an exhaust step of exhausting an atmospheric gas within the spray drying device via a cyclone having a surface made of ceramic; and a step of mixing a fine powder, which has been recovered by the cyclone during the exhaust step, with the granulated substance obtained in the granulation step.
    Type: Application
    Filed: June 24, 2019
    Publication date: July 22, 2021
    Applicant: TOKUYAMA CORPORATION
    Inventors: Hironobu FUJIMOTO, Tsuyoshi IKEDA
  • Patent number: 11066523
    Abstract: A photochromic polyrotaxane compound which comprises an axial molecule and a plurality of cyclic molecules clathrating the axial molecule, wherein at least one side chain containing a photochromic moiety is bonded to at least one of the cyclic molecules, and a curable composition comprising the photochromic polyrotaxane compound and a polymerizable compound.
    Type: Grant
    Filed: June 18, 2018
    Date of Patent: July 20, 2021
    Assignee: TOKUYAMA CORPORATION
    Inventors: Junji Takenaka, Junji Momoda, Takayoshi Kawasaki, Takao Noguchi, Yasutomo Shimizu, Masayuki Miyazaki
  • Publication number: 20210198231
    Abstract: An object is to provide a method for producing a compound which is useful as a synthetic intermediate for an active pharmaceutical ingredient of an antidiabetic drug or the like in an industrially inexpensive and efficient manner, and the present invention can achieve the object by reducing a compound (2) represented by the following formula (2): wherein R1, Ar, n and X are as mentioned herein in the presence of a titanium compound by using a reducing agent to produce a compound (1) represented by the following formula (1): wherein R1, Ar and n are the same as defined above.
    Type: Application
    Filed: May 30, 2019
    Publication date: July 1, 2021
    Applicant: Tokuyama Corporation
    Inventor: Masahiko SEKI
  • Patent number: 11034585
    Abstract: Realized is a solid substance concentration managing method which allows quick detection of an abnormality in a chemical reactor. The present invention is an invention of a solid substance concentration managing method of managing a concentration of a solid substance which is contained in a residue that is discharged in a reaction product gas processing step included in a trichlorosilane producing method, the solid substance concentration managing method including a concentration measuring step of measuring the concentration of the solid substance which is contained in an after-crystallization residue that is obtained by crystallizing part of aluminum chloride.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: June 15, 2021
    Assignee: TOKUYAMA CORPORATION
    Inventors: Junichi Ishida, Masami Enokuchi, Isao Yamashita, Yoshikazu Kodama, Hiroyuki Nishimura
  • Publication number: 20210155736
    Abstract: The present invention relates to a urethane resin obtained by reacting a polymerizable composition containing at least a urethane prepolymer (B2) having an iso(thio)cyanate group at an end of a molecule thereof, which is obtained by reacting a bifunctional active hydrogen-containing compound (C1) having two groups having active hydrogen in a molecule thereof and a bifunctional iso(thio)cyanate group-containing compound (B1) having two iso(thio)cyanate groups in a molecule thereof, a polyrotaxane (A) having a composite molecular structure formed by an axial molecule and a plurality of cyclic molecules clathrating the axial molecule, in which side chains having a group having active hydrogen are introduced into at least a part of the cyclic molecules, and a polyfunctional active hydrogen-containing compound (C2) other than the polyrotaxane (A) and having three or more groups having active hydrogen in a molecule thereof.
    Type: Application
    Filed: April 8, 2019
    Publication date: May 27, 2021
    Applicant: TOKUYAMA CORPORATION
    Inventors: Yasutomo SHIMIZU, Takayoshi KAWASAKI, Mitsuki TOCHI
  • Publication number: 20210155830
    Abstract: The present invention includes: a photochromic adhesive composition containing (A) a photochromic compound having, as a substituent, a molecular chain having a molecular weight of 300 or more, and (B) an adhesive urethane (urea) resin, and having a softening point of 140 to 220° C., and a photochromic laminate using the adhesive composition.
    Type: Application
    Filed: April 4, 2019
    Publication date: May 27, 2021
    Applicant: TOKUYAMA CORPORATION
    Inventors: Toshimitsu HIRAREN, Katsuhiro MORI, Junji MOMODA
  • Publication number: 20210155878
    Abstract: Provided is a method of producing a quatenary alkyl ammonium hypochlorite solution with an excellent storage stability. Specifically, provided is a method of producing a quaternary alkyl ammonium hypochlorite solution, the method including: a preparation step in which a quaternary alkyl ammonium hydroxide solution is prepared and the concentration of amines in the quaternary alkyl ammonium hydroxide solution is set to 20 ppm by mass or less; and a reaction step in which the quaternary alkyl ammonium hydroxide solution is brought into contact with chlorine gas, wherein the concentration of carbon dioxide of a gas phase in the reaction step is 100 ppm by volume or less and the pH of a liquid phase in the reaction step is 10.5 or more.
    Type: Application
    Filed: November 20, 2020
    Publication date: May 27, 2021
    Applicant: TOKUYAMA CORPORATION
    Inventors: Takafumi SHIMODA, Yuki KIKKAWA, Tomoaki SATO, Takayuki NEGISHI
  • Patent number: 11007499
    Abstract: A fluidized-bed reactor (1A) includes a reaction vessel (10A) configured to contain metallurgical grade silicon powder and a hydrogen chloride gas, and a portion of a side wall (w) which portion extends along at least 80% of a height extending from a gas feed opening (21), which is provided in a lower part of the reaction vessel (10A), to a top face of a fluid bed (40) has such a tapered shape that a cross section of the reaction vessel (10A) which cross section is taken perpendicular to a height direction of the reaction vessel (10A) increases in area in an upward direction.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: May 18, 2021
    Assignee: TOKUYAMA CORPORATION
    Inventors: Kenji Hirota, Katsuya Ogihara
  • Patent number: 10995006
    Abstract: Provided is a method for producing polycrystalline silicon at a lighter environmental load and at low production cost. A method in accordance with the present invention for producing polycrystalline silicon includes: a silicon deposition step; a separation step; a hydrogen chloride removal step; a hydrogen refining step; an activated carbon regeneration step; and a circulation step.
    Type: Grant
    Filed: October 5, 2017
    Date of Patent: May 4, 2021
    Assignee: TOKUYAMA CORPORATION
    Inventors: Yuichi Inoue, Masami Enokuchi, Kotaro Okamura