Patents Assigned to Chuo Chemical Co., Inc.
  • Process for producing 2-methyl-1,4-benzoquinone
    Patent number: 5932753
    Abstract: A process for producing 2-methyl-1,4-benzoquinone at a high conversion, a high selectivity and at a low cost by oxidizing m-cresol with oxygen at a low partial pressure in the presence of at least one copper (I) halide catalyst and a mixed solvent of ketone and acetonitrile. The 2-methyl-1,4-benzoquinone is useful as an intermediate compound to produce vitamin K.
    Type: Grant
    Filed: February 9, 1998
    Date of Patent: August 3, 1999
    Assignee: Chuo Chemical Co., Inc.
    Inventors: Kenji Onodera, Eiko Nakatu, Masayuki Kobayashi