Patents by Inventor Boris Vladimirovich Nekrasov

Boris Vladimirovich Nekrasov 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).

  • Contact method of producing sulphuric acid
    Patent number: 4009250
    Abstract: The proposed contact method of producing sulphuric acid consists in that sulphur or pyrite is roasted, with the resulting gaseous mixture having a maximum moisture content of 0.02 percent by volume being treated in order to oxidize the sulphurous acid anhydride contained therein into sulphuric anhydride. Then, the sulphuric anhydride is absorbed from the gaseous mixture by a 92-98 percent sulphuric acid solution, which is taken in a quantity of 0.4 to 1.5 kg per kg of the gaseous mixture. The absorption process is carried out at a temperature from 30.degree. to 125.degree. C. The flow velocity of the gaseous mixture is 13 to 16 m/sec.
    Type: Grant
    Filed: May 21, 1975
    Date of Patent: February 22, 1977
    Inventors: Vasily Nikolaevich Novozhilov, Boris Vladimirovich Nekrasov, Pavel Alexeevich Semenov, deceased, Vera Vasilievna Semenova, administratrix, Irina Pavlovna Semenova, administratrix, Sergei Pavlovich Semenov, administrator