Patents by Inventor Alexandr L. Chimishkian

Alexandr L. Chimishkian 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).

  • Catalyst for the synthesis of aromatic monoisocyanates
    Patent number: 4267070
    Abstract: A catalyst for the synthesis of aromatic monoisocyanates comprising 1.64 to 16.6% by weight of palladium chloride, 0.16 to 47.6% by weight of an oxide of a metal of Group VB of the periodic system, 1.5 to 81.8% by weight of an oxide of a metal of Group VI B of the periodic system, 1.64 to 89.8% by weight of pyridine or an alkylsubstituted pyridine.The use of the catalyst according to the invention in the synthesis of aromatic monoisocyanates makes it possible to obtain a high degree of conversion of the starting compound of up to 100%, a high yield of the desired product of up to 97%, and increased productivity of the catalyst of up to 40 g of the desired product per g of PdCl.sub.2 per hour.
    Type: Grant
    Filed: October 30, 1979
    Date of Patent: May 12, 1981
    Inventors: Boris K. Nefedov, Vladimir I. Manov-Juvensky, Jury I. Dergunov, Anatoly I. Rysikhin, Alexandr L. Chimishkian