Patents by Inventor Sofya A. Egoricheva

Sofya A. Egoricheva 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 of purifying alkylphenol
    Patent number: 4182921
    Abstract: A method of purifying alkylphenyl from impurities contained therein resides in continuous crystallization of alkylphenol and continuous washing of the resulting crystals with a solvent.Washing of the crystals is performed in a layer formed by said crystals, the layer moving downward continuously, with a solvent moving upward.The invention makes it possible to purify alkylphenols effectively and produce them with a high degree of purity with minimum losses of the product, as well as to reduce consumption of the solvent.
    Type: Grant
    Filed: May 12, 1977
    Date of Patent: January 8, 1980
    Inventors: Valentina J. Borgardt, Jury I. Volodin, Zoya S. Shalimova, Boris T. Pantukh, Sofya A. Egoricheva, Grigory I. Rutman, Jury I. Michurov