Patents Represented by Attorney, Agent or Law Firm J. W. Ambrosius
  • Patent number: 4227001
    Abstract: Pentachloropyridine and polychloro derivatives of 2-(trichloromethyl)pyridine are prepared by reacting 2,4-dichloro-6-(trichloromethyl)pyridine in the liquid state with chlorine at temperatures of from about 160.degree. C. in the presence of an amount of catalyst effective to catalyze the reaction.
    Type: Grant
    Filed: March 1, 1979
    Date of Patent: October 7, 1980
    Assignee: The Dow Chemical Company
    Inventors: Thomas J. Dietsche, Jim Love
  • Patent number: 4216087
    Abstract: The present invention concerns a method of inhibiting or controlling calcium scale deposition in SO.sub.2 flue gas scrubbers which comprises scrubbing said flue gases with an aqueous composition comprising concentrated sodium hydroxide and a 2-hydroxyethyl iminodiacetate calcium inhibitor.
    Type: Grant
    Filed: December 18, 1978
    Date of Patent: August 5, 1980
    Assignee: The Dow Chemical Company
    Inventors: Ray S. Long, John B. Siemak
  • Patent number: 4206188
    Abstract: Method of reducing the amount of acetylene impurity present in hydrogen chloride gas comprising contacting said gas with an oxidation catalyst in the presence of an oxygen-containing gas to form carbon monoxide and/or carbon dioxide and water. The method of the present invention is particularly adapted to remove acetylene impurities from hydrogen chloride streams used in the oxychlorination of ethylene in the presence of a catalyst.
    Type: Grant
    Filed: December 6, 1978
    Date of Patent: June 3, 1980
    Assignee: The Dow Chemical Company
    Inventor: Clifford A. Megerle