Patents by Inventor Viktor D. Sheludyakov

Viktor D. Sheludyakov 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 preparing isocyanates
    Patent number: 4192815
    Abstract: A method of preparing organic isocyanates comprising interaction of primary amines and carbon dioxide with hexamethyldisilazane in the presence of an acidic catalyst at a temperature within the range of from 40.degree. to 80.degree. C. and decomposition of the resulting silyl esters of carbamic acid in the presence of a dehydration agent at a temperature within the range of from 0.degree. to 350.degree. C. The desired product is obtained with a yield of from 84 to 97% and the content of the principal compound of up to 99.9%.Preparation of isocyanates by the method according to the present invention is not accompanied by the formation of wastes polluting the environments.
    Type: Grant
    Filed: June 22, 1978
    Date of Patent: March 11, 1980
    Inventors: Viktor D. Sheludyakov, Alexei D. Kirilin, Vladimir F. Mironov, Sergei N. Glushakov, Yakov S. Karpman