Chemistry of inorganic compounds – Sulfur or compound thereof – Oxygen containing
Patent
1995-08-28
1997-04-29
Straub, Gary P.
Chemistry of inorganic compounds
Sulfur or compound thereof
Oxygen containing
423522, 422160, C01B 1774, C01F 100
Patent
active
056246536
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.
REFERENCES:
patent: 3404955 (1968-10-01), Drechset et al.
patent: 3620673 (1971-11-01), Bruwder et al.
patent: 4088742 (1978-05-01), Homme, Jr.
patent: 4478808 (1984-10-01), Matros et al.
patent: 5264200 (1993-11-01), Fellhouse et al.
Dimitrov Dimitry
Dobrev Nikola
Elenkov Dimitry
Enchev Ivan
Grozev Georgy
Institute of Chemical Engineering at Bulgarian Academy of Scienc
Straub Gary P.
Works for Non-Ferrous Metals-AD (KCM-S.A.)
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