Patents Assigned to Kanto Denka Kogyo Co., Ltd.
  • Patent number: 10919714
    Abstract: In a method for gas-flow carrying a solid particle, the solid particle includes a solid substance generating a dissociation equilibrium reaction that dissociates at least one type of gas component, and the solid particle is carried by a gas flow containing the gas component. The average particle diameter of the solid particle is preferably 0.1-1.0 mm. The solid particle is preferably carried by the gas flow in the state of a suspended flow, a fluidized flow, or a plug flow. The solid particle preferably includes a solid substance to generate a dissociation equilibrium reaction that dissociates at least one gas component and at least one solid component, and the solid particle is preferably carried by the gas flow in a carrying pipe and the solid particle or the solid component that has adhered to the interior surface of the carrying pipe is removed by the gas flow.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: February 16, 2021
    Assignee: KANTO DENKA KOGYO CO., LTD.
    Inventors: Go Takikawa, Shinsuke Katayama, Osamu Omae
  • Patent number: 10899615
    Abstract: A chlorine fluoride feeding device and feeding process are provided that can stably generate industrially applicable chlorine fluoride (ClF), control flow rate, and provide continual feed. The feeding process of chlorine fluoride of this invention is a feeding process to feed chlorine fluoride generated by loading a gas that contains fluorine atoms and a gas that contains chlorine atoms to a flow-type heat reactor or a plasma reactor, and it can stably generate and safely feed chlorine fluoride for a long time by reacting chlorine fluoride that is difficult to pack at a high pressure, such that an amount that can be packed in a gas container such as a gas cylinder is limited, with two or more types of gas materials that can be packed safely in a gas container by liquefaction, or with such gas material and a solid material.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: January 26, 2021
    Assignee: KANTO DENKA KOGYO CO., LTD.
    Inventors: Yoshinao Takahashi, Korehito Kato, Yoshimasa Sakurai, Hiroki Takizawa, Sho Kikuchi, Shinichi Kawaguchi, Yoshihiko Iketani, Yukinobu Shibusawa
  • Publication number: 20200393368
    Abstract: Provided are a method and a device that do not require any pretreatment and measure and analyze impurities or hydrogen fluoride in corrosive gas with high sensitivity. The method and the device measure a fluorine-based gas in a sample containing a corrosive gas with a Fourier transform infrared spectrophotometer, wherein the Fourier transform infrared spectrophotometer includes a detector having an InGaAs detection element and a single-path gas cell having an optical path length of 0.01 m to 2 m, a cell window is made of a corrosion-resistant material, a measurement region ranges from 3800 to 14300 cm?1 in wavenumber, and the concentration of the fluorine-based gas is quantified based on an amount of absorption of light having a predetermined wavenumber by the sample and a calibration curve.
    Type: Application
    Filed: March 5, 2019
    Publication date: December 17, 2020
    Applicant: Kanto Denka Kogyo Co., Ltd.
    Inventor: Shinichi KAWAGUCHI
  • Patent number: 10717650
    Abstract: Disclosed is a method for purifying a difluorophosphate, the method including mixing a difluorophosphate containing an impurity with at least one treatment agent selected from the group consisting of carbonates, hydroxides, and halides of alkali metals or alkali earth metals and amines to isolate the impurity. It is preferable that the method further include filtering off, by filtration, a salt or a complex that has been formed by allowing the impurity to be mixed with the treatment agent. Preferably, a carbonate, a hydroxide, or a halide of an alkali metal is used as the treatment agent, and more preferably a carbonate, a hydroxide, or a halide of lithium is used as the treatment agent.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: July 21, 2020
    Assignee: KANTO DENKA KOGYO CO., LTD.
    Inventors: Hiroki Takizawa, Kazuhide Yoshiyama, Keisuke Kude, Wataru Kashikura, Takuro Abe, Mitsuhara Shimoda, Osamu Omae, Hiroyuki Uehara
  • Publication number: 20200157373
    Abstract: The present invention is a paint composition containing (A) a fluorine-containing copolymer, (B) a solvent and (C) a resin particle satisfying the following conditions 1 to 5: condition 1: an average particle size of the resin particle is 0.1 to 50 ?m; condition 2: a refractive index of the resin particle at 20° C. is 0.8 to 1.2 times that of a film composed of the fluorine-containing copolymer (A) at 20° C.; condition 3: a 10% compression strength of the resin particle is 40 MPa or less; condition 4: a compressibility of the resin particle is 20% or more; and condition 5: the resin particle does not suffer from brittle fracture under a load force of 0.1 mN.
    Type: Application
    Filed: March 26, 2018
    Publication date: May 21, 2020
    Applicant: Kanto Denka Kogyo Co., Ltd.
    Inventors: Takumi FUKADA, Yoshitaka MATSUDA, Yoshimasa HIKOBE
  • Patent number: 10629449
    Abstract: A silicon oxide film or a silicon nitride film is selectively etched by using an etching gas composition including a hydrofluorocarbon that has an unsaturated bond in its molecule and is represented by CxHyFz, wherein x is an integer of from 3 to 5, and relationships y+z?2x and y?z are satisfied. Also, a silicon oxide film is etched with high selectivity relative to a silicon nitride film by controlling the ratio among the hydrofluorocarbon, oxygen, argon, etc., included in the hydrofluorocarbon-containing etching gas composition.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: April 21, 2020
    Assignee: Kanto Denka Kogyo Co., Ltd.
    Inventors: Yoshinao Takahashi, Korehito Kato, Tetsuya Fukasawa, Yoshihiko Iketani
  • Publication number: 20190337873
    Abstract: A method for producing a fluorinated alkane represented by the formula (2): R2-F (R2 represents an alkyl group having 3 to 5 carbon atoms) is provided. An alcohol having 3 to 5 carbon atoms is fluorinated by a fluorinating agent represented by the formula (1): R1SO2F (R1 represents a methyl group, an ethyl group or an aromatic group) in the absence of a solvent, and in the presence of a phosphazene base.
    Type: Application
    Filed: July 10, 2019
    Publication date: November 7, 2019
    Applicants: Kanto Denka Kogyo Co., Ltd., ZEON CORPORATION
    Inventors: Kazuki KURIHARA, Tatsuya SUGIMOTO
  • Patent number: 10450253
    Abstract: A simple production process is provided of a perfluoroalkyl compound that uses monohydroperfluoroalkane as a starting material, the perfluoroalkyl compound being an important intermediate of organic electronic materials, medicine, agricultural chemicals, functional polymer materials and the like. With monohydroperfluoroalkane is reacted a base and then a carbonyl compound to produce an alcohol having a perfluoroalkyl group. For example, potassium hydroxide is made to interact with trifluoromethane, and a reaction with a carbonyl compound is induced to produce an alcohol having a trifluoromethyl group.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: October 22, 2019
    Assignees: KANTO DENKA KOGYO CO., LTD., NATIONAL UNIVERSITY CORPORATION GUNMA UNIVERSITY
    Inventors: Hideki Amii, Kazuki Komoda, Masafumi Kobayashi, Yutaka Nakamura, Ryusuke Obinata, Akinori Harada
  • Patent number: 10431472
    Abstract: A silicon oxide film or a silicon nitride film is selectively etched by using an etching gas composition including a hydrofluorocarbon that has an unsaturated bond in its molecule and is represented by CxHyFz, wherein x is an integer of from 3 to 5, and relationships y+z?2x and y?z are satisfied. Also, a silicon oxide film is etched with high selectivity relative to a silicon nitride film by controlling the ratio among the hydrofluorocarbon, oxygen, argon, etc., included in the hydrofluorocarbon-containing etching gas composition.
    Type: Grant
    Filed: October 22, 2018
    Date of Patent: October 1, 2019
    Assignee: KANTO DENKA KOGYO CO., LTD.
    Inventors: Yoshinao Takahashi, Korehito Kato, Tetsuya Fukasawa, Yoshihiko Iketani
  • Patent number: 10392325
    Abstract: The present invention provides: a method for producing a fluorinated alkane represented by the formula (2): R2—F, wherein an alcohol having 3 to 5 carbon atoms is fluorinated by a fluorinating agent represented by the formula (1): R1SO2F in the absence of a solvent, and in the presence of an amidine base. In the formula, R1 represents a methyl group, an ethyl group or an aromatic group, R2 represents an alkyl group having 3 to 5 carbon atoms, and n is 0 or 2.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: August 27, 2019
    Assignees: Kanto Denka Kogyo Co., Ltd., ZEON CORPORATION
    Inventors: Kazuki Kurihara, Tatsuya Sugimoto
  • Patent number: 10287499
    Abstract: Provided are an etching gas composition and an etching method which enable an object, such as a substrate to be etched, to be efficiently precision processed during thin film formation, and which enable efficient removal of an accumulated or adhered silicon-based compound, other than the object such as the substrate to be etched, by means of plasma etching. The etching gas composition is characterized by containing: (1) a fluorinated halogen compound represented by XF (X is Cl, Br or I) as a primary component; (2) F2; (3) a fluorinated halogen compound represented by XFn (X is Cl, Br or I, and n is an integer of 3 or higher); (4) HF; (5) O2; and (6) at least one type of halogen gas molecule selected from among Cl2, Br2 and I2.
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: May 14, 2019
    Assignee: KANTO DENKA KOGYO CO., LTD.
    Inventors: Yoshinao Takahashi, Korehito Kato
  • Publication number: 20190113176
    Abstract: A material at least partly coated with a passive film of fluoride formed by contact with a gas containing ClF.
    Type: Application
    Filed: March 16, 2017
    Publication date: April 18, 2019
    Applicant: Kanto Denka Kogyo Co., Ltd.
    Inventors: Hiroki TAKIZAWA, Sho KIKUCHI, Yukinobu SHIBUSAWA
  • Patent number: 9975771
    Abstract: A method for obtaining high-purity phosphorus pentafluoride (PF5), which is industrially useful in the fields of semiconductors and batteries, from PF5 containing a gas mixture of HCl, HF, and so on. Specifically, provided is a process for purifying phosphorus pentafluoride including (1) an immobilization step in which phosphorus pentafluoride containing a mixture is brought into contact with a metal fluoride (MFn; M is an n-valent metal) having a specific surface area of 1.0 m2/g or more at 40° to 150° C. to immobilize phosphorus pentafluoride in the form of a hexafluorophosphate (M(PF6)n), (2) a separation step in which the mixture remaining in the gas phase is expelled out of the reaction system to separate the mixture from the hexafluorophosphate, and (3) a heat-decomposition step in which the hexafluorophosphate freed of the mixture is heated at 150° to 400° C. under a pressure of ?0.1 to 0.1 MPa·G to give phosphorus pentafluoride.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: May 22, 2018
    Assignee: KANTO DENKA KOGYO CO., LTD.
    Inventors: Katsuhiro Saito, Shinji Mita, Hiromi Oya, Shinsuke Katayama, Yasuyuki Fujiwara, Ichiro Morimoto, Hiroyuki Uehara, Norihisa Kimura
  • Publication number: 20180118642
    Abstract: The present invention provides: a method for producing a fluorinated alkane represented by the formula (2): R2—F, wherein an alcohol having 3 to 5 carbon atoms is fluorinated by a fluorinating agent represented by the formula (1): R1SO2F in the absence of a solvent, and in the presence of a base selected from the group consisting of an amidine base and a phosphazene base; a method for separating and recovering an amidine base from an amidine base-sulfonate complex represented by the following formula (5); and a method for using a recovered amidine base. In the formula, R1 represents a methyl group, an ethyl group or an aromatic group, R2 represents an alkyl group having 3 to 5 carbon atoms, and n is 0 or 2.
    Type: Application
    Filed: March 29, 2016
    Publication date: May 3, 2018
    Applicants: Kanto Denka Kogyo Co., Ltd., Zeon Corporation
    Inventors: Kazuki KURIHARA, Tatsuya SUGIMOTO
  • Patent number: 9944525
    Abstract: The purpose of the present invention is to provide a method for easily producing a difluorophosphate using only low-cost starting materials without requiring cumbersome operations. According to the present invention, at least one salt selected from the group consisting of halides, carbonates, borates, phosphates, hydroxides and oxides of an alkali metal, an alkaline earth metal or an onium, at least one phosphorus compound selected from the group consisting of oxychlorides and chlorides of phosphorus, water and hydrogen fluoride are reacted.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: April 17, 2018
    Assignee: KANTO DENKA KOGYO CO., LTD.
    Inventors: Takuro Abe, Hiroki Takizawa, Teppei Ota
  • Patent number: 9893381
    Abstract: Provided are a nonaqueous electrolyte for secondary batteries containing an electrolyte having high solubility in ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, or a like solvent and capable of forming a good-quality film on the positive and the negative electrode interface and a nonaqueous secondary battery having the nonaqueous electrolyte. Specifically, an electrolyte for secondary batteries containing a lithium salt as a solute and a nonaqueous solvent is provided, the nonaqueous solvent containing a monofluorophosphoric ester salt having general formula 1 or 2, in which symbols are as defined in the description.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: February 13, 2018
    Assignee: KANTO DENKA KOGYO CO., LTD.
    Inventors: Takuro Abe, Osamu Omae
  • Patent number: 9478356
    Abstract: Provided is a surface-coated barium titanate particulate for us in multilayer ceramic capacitors and for which the grain growth during high-temperature firing has been suppressed. Also provided is a production method for same. Barium titanate particulate obtained by means of a hydrothermal reaction, wherein the coated barium titanate particulate has an average particle diameter of at least 10 nm but less than 1000 nm, a Ba/Ti ratio of 0.80-1.20 inclusive, a c/a ratio of 1.001-1.010 inclusive, and a coating layer comprising at least one kind of metal compound selected from the group consisting of Mg, Ca, Ba, Mn and rare earth elements is included on the surface thereof. The coated barium titanate particulate according to the present invention is produced by means of a method including: (1) a step for obtaining barium titanate particulate by mixing an aqueous solution containing barium hydroxide and an aqueous solution containing titanium hydroxide at a Ba/Ti ratio of 0.80-1.
    Type: Grant
    Filed: November 7, 2013
    Date of Patent: October 25, 2016
    Assignee: KANTO DENKA KOGYO CO., LTD.
    Inventors: Hidehiko Iinuma, Yoshimi Moriya
  • Patent number: 9235153
    Abstract: An electrostatic image developer having little change in charge amount, no generation of fog and excellent environmental stability under all of low temperature and low humidity environment, normal temperature and normal humidity environment, and high temperature and high humidity environment is provided. Disclosed is an electrostatic image developer comprising a colored resin particle containing a binder resin and a colorant, and an external additive, wherein the external additive contains an alumina fine particle in plate-like shape subjected to a hydrophobicity-imparting treatment having a number average primary particle diameter of 20 to 120 nm and an aspect ratio of 3 to 15, and a content of the alumina fine particle is in the range from 0.05 to 1 part by mass with respect to 100 parts by mass of the colored resin particle.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: January 12, 2016
    Assignees: ZEON CORPORATION, KANTO DENKA KOGYO CO., LTD.
    Inventors: Hiromichi Jin, Takeru Chiba, Hidehiko Iinuma, Kenichi Yamazaki
  • Publication number: 20150270067
    Abstract: Provided is a surface-coated barium titanate particulate for us in multilayer ceramic capacitors and for which the grain growth during high-temperature firing has been suppressed. Also provided is a production method for same. Barium titanate particulate obtained by means of a hydrothermal reaction, wherein the coated barium titanate particulate has an average particle diameter of at least 10 nm but less than 1000 nm, a Ba/Ti ratio of 0.80-1.20 inclusive, a c/a ratio of 1.001-1.010 inclusive, and a coating layer comprising at least one kind of metal compound selected from the group consisting of Mg, Ca, Ba, Mn and rare earth elements is included on the surface thereof. The coated barium titanate particulate according to the present invention is produced by means of a method including: (1) a step for obtaining barium titanate particulate by mixing an aqueous solution containing barium hydroxide and an aqueous solution containing titanium hydroxide at a Ba/Ti ratio of 0.80-1.
    Type: Application
    Filed: November 7, 2013
    Publication date: September 24, 2015
    Applicant: KANTO DENKA KOGYO CO., LTD.
    Inventors: Hidehiko Iinuma, Yoshimi Moriya
  • Patent number: 8957258
    Abstract: The present invention provides a symmetrical ether compound which is chlorinated in the ? position and which is useful as an intermediate for medicine and pesticides and as a raw material or a synthetic intermediate for producing a fluorine-containing compound, in particular a bis(1,1-dichloro-3,3,3-trifluoropropyl)ether represented by formula [1] which is obtained by chlorinating a bis(3,3,3-trifluoropropyl)ether. This bis(1,1-dichloro-3,3,3-trifluoropropyl)ether is produced by chlorinating, preferably under ultraviolet light irradiation, a bis(3,3,3-trifluoropropyl)ether [1].
    Type: Grant
    Filed: January 21, 2013
    Date of Patent: February 17, 2015
    Assignee: Kanto Denka Kogyo Co., Ltd.
    Inventors: Toshiaki Okamoto, Chizuko Okazaki