Patents by Inventor Aron L. Shapiro

Aron L. Shapiro 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 preparing C.sub.3 -C.sub.4 olefins and vinylaromatic compounds
    Patent number: 4300007
    Abstract: A method for preparing C.sub.3 -C.sub.4 olefins and vinylaromatic compounds, viz. styrene, vinyltoluenes or vinylxylenes which comprises alkylation of toluene or methyl derivatives thereof with a C.sub.2 -C.sub.3 olefin into the methyl group. The resulting alkylaromatic compounds are subjected to conversion to the desired products in the presence of ethylene on a catalyst consisting of chromium oxide, tungsten oxide and an oxide of an alkali or alkali-earth metal supported by a carrier.The method according to the present invention makes it possible to increase the yield of vinylaromatic compounds, obtain individual isomers of vinyltoluene or vinylxylene and efficiently utilize the part of the alkyl radical of the alkylaromatic compound lost in the prior art method.
    Type: Grant
    Filed: October 5, 1977
    Date of Patent: November 10, 1981
    Inventors: Sergei A. Polyakov, Aron L. Shapiro
  • Method and catalyst for preparing styrene
    Patent number: 4192961
    Abstract: A method and catalyst for preparing styrene which comprises dehydrodimerization of toluene, followed by conversion of the resulting dehydrodimerization products to styrene. The conversion is conducted in the presence of ethylene using a catalyst consisting of chromium oxide, tungsten oxide and an alkali metal oxide supported by a carrier. The method according to the present invention makes it possible to increase the yield of styrene and simplify the process technology.
    Type: Grant
    Filed: October 4, 1977
    Date of Patent: March 11, 1980
    Inventors: Sergei A. Polyakov, Aron L. Shapiro, Viktor J. Gankin