Catalytic process for removing SO.sub.2 from sulfuric acid plant

Details Catalytic process for removing SO.sub.2 from sulfuric acid plant Catalytic process for removing SO.sub.2 from sulfuric acid plant

1973-09-17

1976-10-19

Vertiz, Oscar R.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423244, 423535, C01B 1768, C01B 1700

Patent

active

039871533

ABSTRACT:
The invention is directed to an integrated process for reducing the SO.sub.2 content of sulfuric acid plant off gases by (1) passing the SO.sub.2 -containing feed gas to the process over a specially defined multistage oxidation catalyst to convert SO.sub.2 to SO.sub.3, (2) absorbing the SO.sub.3 in water to form H.sub.2 SO.sub.4 and (3) scrubbing the off gases with aqueous hydrogen peroxide and/or sulfur-containing peroxy acids. At least the final oxidation stage of the process employs a supported CsVO.sub.3 or RbVO.sub.3 catalyst which is activated with cobalt or nickel sulfate and promoted with alkali metal sulfates, potassium aluminum sulfate or chromium potassium sulfate.

REFERENCES:
patent: 2029376 (1936-02-01), Joseph

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