Patents Assigned to F-Tech, Inc.
  • Patent number: 7220878
    Abstract: The present invention concerns a method for purifying/separating a 2-fluoro-3-oxoalkylcarboxylic acid ester from a reaction mixture resulting from the fluorination of a 3-oxoalkylcarboxylic acid ester. The method involves depleting the reaction mixture of a hydrogen fluoride byproduct; and subsequently, separating the 2-fluoro-3-oxoalkylcarboxylic acid ester by distillation. The 2-fluoro-3-oxoalkylcarboxylic acid ester obtained by the method of the invention is highly pure and is thus suitable for use as an intermediate for the production of pharmacological products or agricultural chemicals.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: May 22, 2007
    Assignee: Tosoh F-Tech, Inc.
    Inventors: Norihisa Kondo, Hideyuki Mimura, Kosuke Kawada, Shoji Arai
  • Patent number: 7208641
    Abstract: A method for producing 2,2,2-trifluoroethanol in which a ?-hydroxybutyric acid salt is reacted with 1,1,1-trifluoro-2-chloroethane to generate 2,2,2-trifluoroethanol is provided. This method leads to increased yields of 2,2,2 -trifluoroethanol, facilitates the separation of salt byproducts and allows the recycling of an aprotic polar solvent. The present invention concerns a method for producing 2,2,2-trifluoroethanol in which a ?-hydroxybutyric acid salt is reacted with 1,1,1-trifluoro-2-chloroethane in an aprotic polar solvent to generate 2,2,2-trifluoroethanol. This method is characterized in that the ?-hydroxybutyric acid salt used contains no more than 6 wt % of 4,4?-oxybis(butyric acid).
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: April 24, 2007
    Assignee: Tosoh F-Tech, Inc.
    Inventors: Noritaka Nagasaki, Tsuyoshi Kawamura, Kazunori Nukui, Shoji Arai
  • Publication number: 20060252897
    Abstract: The present invention relates to a polymerizable monomer represented by the general formula (1), wherein R1 is a hydrogen atom, a halogen atom, a hydrocarbon group or a fluorine-containing alkyl group; R2 is a straight-chain or branched alkyl group, a cyclic alkyl group, an aromatic group, or a substituent having at least two of these groups, the R2 being optionally partially fluorinated; R3 is a hydrogen atom, a hydrocarbon group that is optionally branched, a fluorine-containing alkyl group, or a cyclic group having an aromatic or alicyclic structure, the R3 optionally containing a bond of an oxygen atom or carbonyl group; and n is an integer of 1-2.
    Type: Application
    Filed: July 13, 2006
    Publication date: November 9, 2006
    Applicants: Central Glass Company, Limited, F-Tech, Inc.
    Inventors: Satoru Miyazawa, Kazuhiko Maeda, Kenji Tokuhisa, Shoji Arai
  • Patent number: 7019162
    Abstract: A process for producing a 2-fluoro-3-oxoalkylcarboxylic acid ester by fluorinating 3-oxoalkylcarboxylic acid ester with a fluorine gas is provided. The process is characterized in that the concentration of 3-oxoalkylcarboxylic acid ester in the reaction mixture for fluorination is maintained at 3 wt % or higher. Also provided is a process for purifying 2-fluoro-3-oxoalkylcarboxylic acid ester characterized in that 2-fluoro-3-oxoalkylcarboxylic acid ester is produced at high yield and with less impurities by washing fluorinated 3-oxoalkylcarboxylic acid ester with 3 or more times as much water as the amount of reaction mixture. According to the processes of the present invention, not only is the generation of unwanted by-products minimized, but fluorinated 3-oxoalkylcarboxylic acid ester can be purified in an efficient manner.
    Type: Grant
    Filed: December 25, 2001
    Date of Patent: March 28, 2006
    Assignee: Tosoh F-Tech, Inc.
    Inventors: Norihisa Kondo, Hideyuki Mimura, Kazunori Nukui, Kosuke Kawada, Shoji Arai
  • Patent number: 6894197
    Abstract: A method for producing fluorinated alcohols from fluorinated alkyl halides can produce fluorinated alcohols at high product yield and at high selectivity in a single-step reaction. The method eliminates the need to use heavy metals and other toxic compounds that are difficult to handle or process. Specifically, the method produces a fluorinated alcohol represented by the following general formula (2): Rf(A)OH??(2) wherein Rf represents a perfluoroalkyl group having 1 to 10 carbon atoms; and A represents a straight-chained or branched saturated hydrocarbon group having 3 to 10 carbon atoms. The method is characterized in that it allows a fluorinated alkyl halide represented by the following general formula (1) to react with an alkali metal salt of 4-hydroxybutyrate in a gamma-butyrolactone solvent: Rf(A)X??(1) wherein Rf and A are as defined above; and X represents a halogen atom.
    Type: Grant
    Filed: July 1, 2002
    Date of Patent: May 17, 2005
    Assignee: Tosoh F-Tech, Inc.
    Inventors: Hideyuki Mimura, Kosuke Kawada, Shoji Arai
  • Publication number: 20040236046
    Abstract: The present invention relates to a polymerizable monomer represented by the general formula (1), 1
    Type: Application
    Filed: June 30, 2004
    Publication date: November 25, 2004
    Applicants: Central Glass Company, Limited, F-Tech, Inc.
    Inventors: Satoru Miyazawa, Kazuhiko Maeda, Kenji Tokuhisa, Shoji Arai
  • Patent number: 6784312
    Abstract: The present invention relates to a polymerizable monomer represented by the general formula (1), wherein R1 is a hydrogen atom, a halogen atom, a hydrocarbon group or a fluorine-containing alkyl group; R2 is a straight-chain or branched alkyl group, a cyclic alkyl group, an aromatic group, or a substituent having at least two of these groups, the R2 being optionally partially fluorinated; R3 is a hydrogen atom, a hydrocarbon group that is optionally branched, a fluorine-containing alkyl group, or a cyclic group having an aromatic or alicyclic structure, the R3 optionally containing a bond of an oxygen atom or carbonyl group; and n is an integer of 1-2.
    Type: Grant
    Filed: July 19, 2002
    Date of Patent: August 31, 2004
    Assignees: Central Glass Company, Limited, F-Tech, Inc.
    Inventors: Satoru Miyazawa, Kazuhiko Maeda, Kenji Tokuhisa, Shoji Arai
  • Patent number: 5283379
    Abstract: Method for producing TrFE by reaction of R-113 with hydrogen in the presence of a catalyst comprising palladium and at least one selected from gold, tellurium, antimony, bismuth, and arsenic, supported on an inert carrier. TrFE can be produced from R-113 and hydrogen through one-step reaction by use of the catalyst.
    Type: Grant
    Filed: April 15, 1993
    Date of Patent: February 1, 1994
    Assignee: F. Tech, Inc.
    Inventors: Takao Saiki, Makoto Sumida, Satohiro Nakano, Kengo Murakami