Patents by Inventor Igor Jurievich Logutov

Igor Jurievich Logutov 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 2,6-ditert.butylphenol
    Patent number: 4122289
    Abstract: A method for preparing 2,6-ditert.butylphenol which comprises alkylation of phenol in the presence of monotert.-butylphenol and a catalyst, viz. aluminium dissolved in phenol with gradually lowering the process temperature from 120.degree. to 50.degree. C and reducing the concentration of isobutylene in the mixture of isomeric butenes from 80 to 1.5 mol.%, followed by isolation of the desired product.The method according to the present invention makes it possible to achieve a high degree of conversion of isobutylene without impairing quality of the desired product. The amount of by-products formed in the process is 2-3 times as less as in the prior art methods.
    Type: Grant
    Filed: August 5, 1977
    Date of Patent: October 24, 1978
    Inventors: Jury Ivanovich Michurov, Vladimir Avgustovich Yanshevsky, Rufina Alexandrovna Filippova, Yakov Abramovich Gurvich, Igor Jurievich Logutov, Sofya Alexandrovna Egoricheva, Izrail Markovich Belgorodsky, Sergei Gerasimovich Vyborov
  • Method of preparing 2,6-di-tert.butylphenol
    Patent number: 4113976
    Abstract: A method of preparing 2,6-di-tert.butylphenol comprises alkylation of phenol with isobutylene at a temperature within the range of from 100.degree. to 110.degree. C in the presence, as a catalyst, of phenyloxyorthotertbutylphenoxyhydroaluminum acid of the formula:[(OC.sub.6 H.sub.5).sub.n (ortho-tert.C.sub.4 H.sub.9 C.sub.6 H.sub.4 O).sub.m Al]Hwhereinn = 1 to 3;m = 1 to 3;n + m = 4.The method of the present invention makes it possible to increase the product yield to 80% by weight and to conduct the process under atmospheric pressure.
    Type: Grant
    Filed: April 18, 1977
    Date of Patent: September 12, 1978
    Inventors: Jury Ivanovich Michurov, Boris Izrailevich Pantukh, Valerian Mikhailovich Sobolev, Grigory Iosifovich Rutman, Igor Jurievich Logutov, Vladimir Romanovich Dolidze