Patents Assigned to Kabushiki Kaisha Pollution Preventing Research Laboratory
  • Method for producing adipic acid and precursors thereof
    Patent number: 4105520
    Abstract: A method for producing adipic acid and precursor thereof which comprises oxidizing cyclohexane with nitrogen dioxide under irradiation of visible ray or ultraviolet ray in the presence of oxygen is incorporated with a method for producing adipic acid which comprises oxidizing said precursor with liquid nitrogen dioxide N.sub.2 O.sub.4 at a temperature below the boiling point thereof. It should be noted that the precursor means cyclohexanone, cyclohexanol, cyclohexylnitrite, cyclohexylnitrate or the mixture thereof.
    Type: Grant
    Filed: April 7, 1977
    Date of Patent: August 8, 1978
    Assignee: Kabushiki Kaisha Pollution Preventing Research Laboratory
    Inventors: Wataru Ando, Ichiro Nakaoka
  • Method for producing nitrobenzene
    Patent number: 4104145
    Abstract: A method for the nitration of benzene by the use of nitrogen dioxide under irradiation of visible ray or ultraviolet ray in the presence of oxygen.
    Type: Grant
    Filed: March 28, 1977
    Date of Patent: August 1, 1978
    Assignee: Kabushiki Kaisha Pollution Preventing Research Laboratory
    Inventors: Wataru Ando, Ichiro Nakaoka
  • Method of decomposing nitrogen oxide (NO.sub.x)
    Patent number: 4076606
    Abstract: A method of decomposing NO.sub.x which includes exciting effluent gas containing nitrogen and NO.sub.x, or nitrogen, NO.sub.x and oxygen and/or carbon dioxide, and so on, with microwave irradiation.
    Type: Grant
    Filed: August 2, 1976
    Date of Patent: February 28, 1978
    Assignee: Kabushiki Kaisha Pollution Preventing Research Laboratory
    Inventors: Shin Suzuki, Kazuo Matsumoto, Ichiro Nakaoka