Procedure almost total elimination of sulfur compounds H2S, SO2, COS and / or CS2 contained in a residual sulfur factory gas, with recovery of said compounds as sulfur.

摘要

The offgas is contacted by one (1) with a catalyst of hydrolysis of COS and CS2 to H2 SY optionally in the presence of a flow of air with an oxidation catalyst H2 S to form a gas hydrolyzate (17) H2 CONTAINING SO2 AND FREE SY COS and CS2, keeping volume concentrations (H2 S) AND (SO2) IN THE GAS (17) to (H2 S)}) SUPERIOR SEA 0.2% without exceeding 0 ,5 %. Said gas (17) is introduced into a CLAUS (3A) UNIT WHERE SY H2 SO2 react to form sulfur GAS PRODUCTION BASICALLY A REFINED (25A) containing H2 S ONLY AS SULFUR COMPOUND. GAS (25A) is injected, between 80 100ºC CY WITH EXCESS AIR catalytic (4A) unit where the H2 S is oxidized TOTALLY SULFUR. SULFUR COMPOUNDS OF GAS RECOVERING RESIDUAL almost entirely IN THE FORM OF SULFUR.