Patent ID: 6485697
Filing Date: 2002-11-26
Classification: B01D,C10L,Y02C

Abstract:
A process for the removal of hydrogen sulfide and carbon dioxide from a gaseous mixture that contains hydrogen sulfide and carbon dioxide comprising:(a) contacting the gaseous mixture with an aqueous alkaline solution comprising about 20% to about 30% by weight K2CO3, about 0.5% to about 5% by weight V2O5 and about 0.5% to about 5% by weight H3BO3 wherein the vanaditum oxidizing agent is in such an amount to provide at least a 10 to 1 molar ratio of the vanadium oxidizing agent to hydrogen sulfide in the gaseous mixture at a temperature of about 150 degrees F. to about 300 degrees F. thereby absorbing hydrogen sulfide and carbon dioxide into the aqueous alkaline solution; (b) oxidizing H2S in the aqueous alkaline solution to elemental sulfur; (c) removing elemental sulfur from the aqueous alkaline solution; and (d) stripping CO2 from the aqueous alkaline solution.