Basf Aktiengesellschaft

Metallgesellschaft Aktiengesellschaft

Peter Ahrens

Hugo Grimm

Arend Werner

Michael Tacke

Bruno Triebskorn

Heinz Neumann

Egon Winkler

Walter Beitelschmidt

To effect a quasi-isothermal catalytic reaction of SO.sub.2 to SO.sub.3, a plurality of consecutive rows of banks of cooling tubes, are provided in the bed of shaped catalyst bodies in a contact reactor in such a manner that the banks of succeeding rows are staggered from the banks of the preceding rows. The distance between the cooling tubes in the banks is so selected that a penetration of entire catalyst bodies into the banks will virtually be prevented. The banks are so designed that the pressure drop of the gas in the banks is approximately the same as the pressure drop in the layer of catalyst between the bank. The distance between the banks is larger than the width of the banks.

Contact reactor for a quasi-isothermal catalytic oxidation of SO.sub.2

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Seligenstadt, Germany

Peter Ahrens