Patents by Inventor Dimitry Dimitrov

Dimitry Dimitrov 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 producing sulphur trioxide
    Patent number: 5624653
    Abstract: The method for the production of sulphur trioxide, operating in a non-stanary regime, intend for sulphuric acid production.The aim of the present invention is to provide a method for the production of SO.sub.3 by catalytic oxidation of SO.sub.2, contained in an inlet gas flow, providing a stable regime of operation of wide limits of variation of the flow rate and the concentration of SO.sub.2 in the input gas.The essence of the invention is in this, that between the two layers of the first step of oxidation in a two-step three-layer contact apparatus, the gas flow is partially cooled in an inner heat-exchanger-mixer and part of the heat of the reaction of oxidation of SO.sub.2 in the first stage of oxidation is passed to the second stage of oxidation by means of the gas flow coming out of the intermediate absorption, containing unoxidized SO.sub.2 from the first stage.
    Type: Grant
    Filed: August 28, 1995
    Date of Patent: April 29, 1997
    Assignees: Institute of Chemical Engineering at Bulgarian Academy of Sciences, Works for Non-Ferrous Metals-AD (KCM-S.A.)
    Inventors: Georgy Grozev, Christo Sapundjiev, Dimitry Elenkov, Dimitry Dimitrov, Nikola Dobrev, Ivan Enchev