Patents Assigned to Quimica Organica De Mexico, S.A. De C.Y.
  • Purification of pentachloronitrobenzene by distillation
    Patent number: 4842696
    Abstract: Pentachloronitrobenzene (PCNB) which initially contains in excess of 0.5% hexachlorobenzene (HCB) is purified by distilling the impure PCNB at a temperature between 100.degree.-250.degree. C. and a pressure below or at atmospheric pressure to obtain a PCNB product having a HCB content lower than 0.5%, and preferably lower than 0.1%.
    Type: Grant
    Filed: October 8, 1987
    Date of Patent: June 27, 1989
    Assignee: Quimica Organica De Mexico, S.A. De C.Y.
    Inventor: Arturo S. Cazares