Abstract 1. IN A PROCESS FOR PURIFYING A GAS CONTAINING H2S, SO2 AND ORGANIC SULPHUR COMPOUNDS, SAID PROCESS COMPRISING REACTING H2S AND SO2 IN A SULPHUR PRODUCING REACTION WITH AN ORGANIC SOLVENT AT 20-160*C., THE IMPROVEMENT COMPRISING THE PRELIMINARY STEPS OF (A) REACTING SAID GAS AND STEAM IN A FIRST REACTION ZONE IN THE PRESENCE OF A CATALYST CONSISTING ESSENTIALLY OF ALUMINA AT 250-400*C. TO CONVERT SAID ORGANIC COMPOUNDS SUBSTANTIALLY COMPLETELY TO H2S WHILE EFFECTING SUBSTANTIALLY NO CONVERSION OF THE SO2 IN THE GAS TO H2S, RESULTING IN A GAS HAVING AN UNDESIRABLY HIGH MOLAR RATIO OF H2S/SO2, AND (B) REACTING RESULTANT GAS FROM STEP (A) WITH SUFFICIENT OXYGEN IN A SECOND REACTION ZONE AT 300-500*C., TO CONVERT A PORTION OF THE H2S IN SAID GAS TO SO2 AND TO FORM A GAS HAVING A DESIRABLY LOWER MOLAR RATIO OF H2S/SO2 BETWEEN 1.6 AND 3.
IN A PROCESS FOR PURIFYING A GAS CONTAINING H2S, SO2 AND ORGANIC SULPHUR COMPOUNDS, SAID PROCESS COMPRISING REACTING H2S AND SO2 IN A SULPHUR PRODUCING REACTION WITH AN ORGANIC SOLVENT AT 20-160*C., THE IMPROVEMENT COMPRISING THE PRELIMINARY STEPS OF (A) REACTING SAID GAS AND STEAM IN A FIRST REACTION ZONE IN THE PRESENCE OF A CATALYST CONSISTING ESSENTIALLY OF ALUMINA AT 250-400*C. TO CONVERT SAID ORGANIC COMPOUNDS SUBSTANTIALLY COMPLETELY TO H2S WHILE EFFECTING SUBSTANTIALLY NO CONVERSION OF THE SO2 IN THE GAS TO H2S, RESULTING IN A GAS HAVING AN UNDESIRABLY HIGH MOLAR RATIO OF H2S/SO2, AND (B) REACTING RESULTANT GAS FROM STEP (A) WITH SUFFICIENT OXYGEN IN A SECOND REACTION ZONE AT 300-500*C., TO CONVERT A PORTION OF THE H2S IN SAID GAS TO SO2 AND TO FORM A GAS HAVING A DESIRABLY LOWER MOLAR RATIO OF H2S/SO2 BETWEEN 1.6 AND 3.
Claim 2
Dependent Claim
143 words
IN A PROCESS FOR PURIFYING A GAS CONTAINING H2S, SO2 AND ORGANIC SULPHUR COMPOUNDS, SAID PROCESS COMPRISING REACTING H2S AND SO2 IN A SULPHUR PRODUCING REACTION WITH AN ORGANIC SOLVENT AT 20-160*C., THE IMPROVEMENT COMPRISING THE PRELIMINARY STEPS OF (A) REACTING SAID GAS AND STEAM IN A FIRST REACTION ZONE IN THE PRESENCE OF A CATALYST CONSISTING ESSENTIALLY OF ALUMINA AT 250-400*C. TO CONVERT SAID ORGANIC COMPOUNDS SUBSTANTIALLY COMPLETELY TO H2S WHILE EFFECTING SUBSTANTIALLY NO CONVERSION OF THE SO2 IN THE GAS TO H2S, RESULTING IN A GAS HAVING AN UNDESIRABLY HIGH MOLAR RATIO OF H2S/SO2, AND (B) REACTING RESULTANT GAS FROM STEP (A) WITH SUFFICIENT OXYGEN IN A SECOND REACTION ZONE AT 300-500*C., TO CONVERT A PORTION OF THE H2S IN SAID GAS TO SO2 AND TO FORM A GAS HAVING A DESIRABLY LOWER MOLAR RATIO OF H2S/SO2 BETWEEN 1.6 AND 3.