Patents by Inventor Lev Nikolaevich Bobkov

Lev Nikolaevich Bobkov 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).

  • Process for the production of alumina from the mineral component of solid fuels
    Patent number: 4113833
    Abstract: The invention relates to a process for the production of alumina from mineral component of solid fuels containing aluminum, silicon and iron oxides. The process comprises burning a mixture of a solid fuel with limestone in the following molar ratios of limestone to said oxides: CaO:SiO.sub.2 =2.0, CaO:Al.sub.2 O.sub.3 =1.3-1.8, CaO:Fe.sub.2 O.sub.3 =1.0, at 1700.degree.-1900.degree. C. As a result, a melt is obtained containing calcium compounds: 2CaO.SiO.sub.2, 12CaO.7Al.sub.2 O.sub.3, CaO.Al.sub.2 O.sub.3, CaO.Fe.sub.2 O.sub.3. The melt is cooled and leached with soda solutions for extracting alumina. The sludge remaining after the leaching is suitable for Portland cement production. The invention enables a considerable enlargement of the range of starting products for aluminum and cement industries due to the use of the mineral component of solid fuels, an about twofold reduction of capital investments in the alumina production and reduction of the fuel consumption by 30-40%.
    Type: Grant
    Filed: July 2, 1976
    Date of Patent: September 12, 1978
    Inventors: Nikolai Ivanovich Eremin, Semen Alexandrovich Tager, Vladimir Nikolaevich Kostin, Lev Nikolaevich Bobkov, Mikhail Ivanovich Zaitsev, Nikolai Andreevich Kaluzhsky, Nikolai Stepanovich Shmorgunenko, Abram Zinovievich Jurovsky, Viktor Mikhailovich Kozlov, Fritiof Meerovich Yakhilevich, Mikhail Yakovlevich Shpirt, Vladlen Iosifovich Panin