Patents by Inventor Usein M. Dzhemilev

Usein M. Dzhemilev 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 trans-, trans-, trans-1,5,9-cyclododecatriene
    Patent number: 4270016
    Abstract: A method of preparing trans-, trans-, trans-1,5,9-cyclododecatriene which comprises cyclotrimerization of butadiene at a temperature within the range of from 50.degree. to 150.degree. C. in the presence of a catalytic system consisting of a compound of bivalent nickel, an organo-aluminium compound of the formula (1) or (2):R.sub.3 Al (1)andR.sub.2 Al--X (R').sub.n (2)wherein R, and R' are each C.sub.2 H.sub.5 --, ##STR1## X is --O-- when n=1 and --N-- when n=2; and an activator, viz. a compound of formula (3) or (4):R.sub.3 Si--OR' (3)wherein R is an alkyl; R' is an alkyl, C.sub.6 H.sub.5 --, C.sub.6 H.sub.11,N(CRR'--CRR"--O).sub.3 B (4)wherein R and R" are each CH.sub.3 --, C.sub.2 H.sub.5 --, C.sub.6 H.sub.10, C.sub.8 H.sub.11 --, H--; R is H--.The method according to the present invention makes it possible to increase the yield of the desired product up to 95% by weight.
    Type: Grant
    Filed: June 1, 1979
    Date of Patent: May 26, 1981
    Inventors: Genrikh A. Tolstikov, Usein M. Dzhemilev, Grigory I. Rutman, Jury I. Michurov, Boris I. Pantukh, Stanislav S. Shavanov, Sagid R. Rafikov, Sofia A. Egoricheva, Valery P. Juriev, Alexandr G. Liakumovich, Valerian M. Sobolev, Boris S. Korotkevich, Jury A. Shmuk, Elena Y. Mandelshtamm