Patents by Inventor Vladimir Mikhailovich Zakoshansky

Vladimir Mikhailovich Zakoshansky has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Cumene oxidation process
    Patent number: 5908962
    Abstract: Greater efficiency in a water-alkaline emulsion cumene oxidation process using a cascade of reactors is obtained by splitting the reactor cascade into 2 stages with the first stage utilizing NH.sub.4 NaCO.sub.3 as the active carbonate in the stage containing less than 18% by weight cumene hydroperoxide and using Na.sub.2 CO.sub.3 as the active carbonate in the stage containing more than 18% by weight cumene hydroperoxide. By directly injecting ammonia into a recycle stream organic acids are efficiently neutralized. A counter current water wash of the second stage also increases process efficiency by scrubbing out unwanted impurities. Control of pH in the process improves efficiency and reduces impurity levels.
    Type: Grant
    Filed: February 9, 1998
    Date of Patent: June 1, 1999
    Assignee: General Electric Company and Illa International
    Inventors: Vladimir Mikhailovich Zakoshansky, Andrei Konstantinovich Griaznov, Irina I. Vasilieva, John W. Fulmer, William D. Kight
  • Cumene oxidation process
    Patent number: 5767322
    Abstract: Greater efficiency in a water-alkaline emulsion cumene oxidation process using a cascade of reactors is obtained by splitting the reactor cascade into 2 stages with the first stage utilizing NH.sub.4 NaCO.sub.3 as the active carbonate in the stage containing less than 18% by weight cumene hydroperoxide and using Na.sub.2 CO.sub.3 as the active carbonate in the stage containing more than 18% by weight cumene hydroperoxide. By directly injecting ammonia into a recycle stream organic acids are efficiently neutralized. A counter current water wash of the second stage also increases process efficiency by scrubbing out unwanted impurities. Control of pH in the process improves efficiency and reduces impurity levels.
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: June 16, 1998
    Assignee: General Electric Company
    Inventors: Vladimir Mikhailovich Zakoshansky, Andrei Konstantinovich Griaznov, Irina I. Vasilieva, John W. Fulmer, William D. Kight