Process and apparatus for the production of gases containing sulfur trioxide

Claim 1

IN THE MANUFACTURE OF GASES CONTAINING SULFUR TRIOXIDE BY THE MULTI-STAGE CATALYTIC REACTION OF GASES CONTAINING SULFUR DIOXIDE AND OXYGEN IN WHICH THE REACTION GASES ARE COOLED BY THE SUPPLY OF COOLING GAS BETWEEN SUCCESSIVE STAGES, THE IMPROVEMENT WHICH COMPRISES; INTIMATELY AND UNIFORMLY MIXING A PLURALITY OF INDIVIDUAL PORTIONS OF SAID REACTION GASES LEAVING ONE STAGE WITH A CORRESPONDING PLURALITY OF PORTIONS OF SAID COOLING GAS AT INDIVIDUAL POINTS EXTENDING UNIFORMLY OVER THE PATH OF FLOW OF SAID REACTION GASES BETWEEN A PAIR OF SUCCESSIVE STAGES, SAID MIXING BEING EFFECTED BY SUBDIVIDING SAID PLURALITY OF INDIVIDUAL PORTIONS OF SAID REACTION GASES INTO INDIVIDUAL SECTIONS AND INTRODUCING SAID COOLING GAS SEPAATELY AND INDEPENDENTLY INTO EACH OF SAID SECTIONS; AND DIRECTING THE RESULTING UNIFORM MIXTURE FROM SAID INDIVIDUAL POINTS TO THE SUCCEEDING STAGE.