Patents by Inventor Yuri Nikolaevich Koshelev

Yuri Nikolaevich Koshelev 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).

  • Method for removing impurities from phenol
    Patent number: 8013191
    Abstract: A two-step method of crude phenol treatment from impurities, wherein a first step comprises oxidizing hydroxyacetone and aldehydes impurities, in phenol medium by air oxygen with the use of a heterogeneous catalyst which contains transition metals, and a second step comprises treating the unoxidized impurities with the use of a heterogeneous acidic catalyst. The separation of treatment by-products compounds produced during said phenol treatment may then be carried out by a conventional fractionation, distillation, or equivalent method, to produce highly purified product phenol.
    Type: Grant
    Filed: July 19, 2006
    Date of Patent: September 6, 2011
    Assignee: Illa International, LLC
    Inventors: Vladimir Mikhailovitch Zakoshansky, Irina Ivanovna Vassilieva, Yuri Nikolaevich Koshelev, Yuri Ivanovitch Malov