Process for purifying a sulfur dioxide containing gas with production of elemental sulfur

Process for purifying SO2-containing gas comprising a first step of contacting said gas with an aqueous solution of an ammonium sulfite or an ammonium thiosulfate also containing ammonium sulfate, a second step of contacting the resulting solution with a H2S-containing gas at 20 DEG -90 DEG C. to pr...

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Hauptverfasser:	DESCHAMPS, ANDRE, GRUHIER, HENRI, RENAULT, PHILIPPE, DEZAEL, CLAUDE
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOUNDS THEREOF INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
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creator	DESCHAMPS, ANDRE GRUHIER, HENRI RENAULT, PHILIPPE DEZAEL, CLAUDE
description	Process for purifying SO2-containing gas comprising a first step of contacting said gas with an aqueous solution of an ammonium sulfite or an ammonium thiosulfate also containing ammonium sulfate, a second step of contacting the resulting solution with a H2S-containing gas at 20 DEG -90 DEG C. to produce sulfur which is separated from the remaining solution, a third step of recyling 90 to 99.99% by volume of said remaining solution to the first step, and a fourth step of introducing 0.01 to 10% by volume of said remaining solution into a molten salt formed of ammonium sulfate and/or bisulfate so as to produce a gas containing SO2, ammonia, sulfur and steam, which is recycled to the first step.
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subjects	CHEMISTRY COMPOUNDS THEREOF INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
title	Process for purifying a sulfur dioxide containing gas with production of elemental sulfur
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