Abstract 1. IN A PROCESS FOR THE REMOVAL OF SULFUR DIOXIDE FROM GAS MIXTURES WITH A SOLID ACCEPTOR FOR SULFUR DIOXIDE WHEREIN THE SOLID ACCEPTOR IS REGENERATED WITH THE PRODUCTION OF A REGENERATION OFF-GAS RICH IN SULFUR DIOXIDE, THE IMPROVEMENT WHICH COMPRISES RECOVERING THE SULFUR VALUE FROM SAID REGENERATION OFF-GAS BY: (A) INTRODUCING SAID SULFUR DIOXIDE-CONTAINING REGENERATION OFF-GAS INTO THE THERMIC REACTION ZONE OF A CLAUS PROCESS IN WHICH ZONE HYDROGEN SULFIDE IS PARTIALLY COMBUSTED WITH AN OXYGEN-CONTAINING GAS TO PRODUCE SULFUR DIOXIDE, THE MOLE PERCENTAGE OF SULFUR DIOXIDE IN THE INTRODUCED REGENERATION OFF-GAS TO THE SULFUR DIOXIDE PRODUCED BY PARTIAL COMBUSTION BEING AT LAST 25%; (B) MAINTAINING THE TEMPERATURE IN THE THERMIC REACTION ZONE AT LAST 700*C. WHEREBY HYDROGEN SULFIDE AND SULFUR DIOXIDE REACT TO FORM ELEMENTAL SULFUR; (C) WITHDRAWING FROM AID THERMIC REACTION ZONE A GASEOUS EFFLUENT CONTAINING THE FORMED SULFUR AND UNREACTED HYDROGEN SULFIDE AND SULFUR DIOXIDE, AND (D) SEPARATING FORMED SULFUR FROM THE GASEOUS EFFLUENT AND PASSING THE GASEOUS EFFLUENT TO A CATALYTIC REACTION ZONE WHEREIN AN ADDITIONAL AMOUNT OF ELEMENTAL SULFUR IS FORMED AND SUBSEQUENTLY RECOVERED.
IN A PROCESS FOR THE REMOVAL OF SULFUR DIOXIDE FROM GAS MIXTURES WITH A SOLID ACCEPTOR FOR SULFUR DIOXIDE WHEREIN THE SOLID ACCEPTOR IS REGENERATED WITH THE PRODUCTION OF A REGENERATION OFF-GAS RICH IN SULFUR DIOXIDE, THE IMPROVEMENT WHICH COMPRISES RECOVERING THE SULFUR VALUE FROM SAID REGENERATION OFF-GAS BY: (A) INTRODUCING SAID SULFUR DIOXIDE-CONTAINING REGENERATION OFF-GAS INTO THE THERMIC REACTION ZONE OF A CLAUS PROCESS IN WHICH ZONE HYDROGEN SULFIDE IS PARTIALLY COMBUSTED WITH AN OXYGEN-CONTAINING GAS TO PRODUCE SULFUR DIOXIDE, THE MOLE PERCENTAGE OF SULFUR DIOXIDE IN THE INTRODUCED REGENERATION OFF-GAS TO THE SULFUR DIOXIDE PRODUCED BY PARTIAL COMBUSTION BEING AT LAST 25%; (B) MAINTAINING THE TEMPERATURE IN THE THERMIC REACTION ZONE AT LAST 700*C. WHEREBY HYDROGEN SULFIDE AND SULFUR DIOXIDE REACT TO FORM ELEMENTAL SULFUR; (C) WITHDRAWING FROM AID THERMIC REACTION ZONE A GASEOUS EFFLUENT CONTAINING THE FORMED SULFUR AND UNREACTED HYDROGEN SULFIDE AND SULFUR DIOXIDE, AND (D) SEPARATING FORMED SULFUR FROM THE GASEOUS EFFLUENT AND PASSING THE GASEOUS EFFLUENT TO A CATALYTIC REACTION ZONE WHEREIN AN ADDITIONAL AMOUNT OF ELEMENTAL SULFUR IS FORMED AND SUBSEQUENTLY RECOVERED.
Claim 2
Dependent Claim
179 words
IN A PROCESS FOR THE REMOVAL OF SULFUR DIOXIDE FROM GAS MIXTURES WITH A SOLID ACCEPTOR FOR SULFUR DIOXIDE WHEREIN THE SOLID ACCEPTOR IS REGENERATED WITH THE PRODUCTION OF A REGENERATION OFF-GAS RICH IN SULFUR DIOXIDE, THE IMPROVEMENT WHICH COMPRISES RECOVERING THE SULFUR VALUE FROM SAID REGENERATION OFF-GAS BY: (A) INTRODUCING SAID SULFUR DIOXIDE-CONTAINING REGENERATION OFF-GAS INTO THE THERMIC REACTION ZONE OF A CLAUS PROCESS IN WHICH ZONE HYDROGEN SULFIDE IS PARTIALLY COMBUSTED WITH AN OXYGEN-CONTAINING GAS TO PRODUCE SULFUR DIOXIDE, THE MOLE PERCENTAGE OF SULFUR DIOXIDE IN THE INTRODUCED REGENERATION OFF-GAS TO THE SULFUR DIOXIDE PRODUCED BY PARTIAL COMBUSTION BEING AT LAST 25%; (B) MAINTAINING THE TEMPERATURE IN THE THERMIC REACTION ZONE AT LAST 700*C. WHEREBY HYDROGEN SULFIDE AND SULFUR DIOXIDE REACT TO FORM ELEMENTAL SULFUR; (C) WITHDRAWING FROM AID THERMIC REACTION ZONE A GASEOUS EFFLUENT CONTAINING THE FORMED SULFUR AND UNREACTED HYDROGEN SULFIDE AND SULFUR DIOXIDE, AND (D) SEPARATING FORMED SULFUR FROM THE GASEOUS EFFLUENT AND PASSING THE GASEOUS EFFLUENT TO A CATALYTIC REACTION ZONE WHEREIN AN ADDITIONAL AMOUNT OF ELEMENTAL SULFUR IS FORMED AND SUBSEQUENTLY RECOVERED.