PROCESS FOR PURIFYING A GAS CONTAINING OXYGEN AND SULFUR COMPOUNDS
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Abstract
THE PURIFACTION PROCESS, WHICH MAY BE USED FOR REMOVING SULFUR DIOXIDE FROM INDUSTRIAL FUMES, COMPRISES SEVERAL INTERCONNECTED STEPS: ADSORPTION IN A SOLUTION OF ALKALI METAL OR AMMONIUM SULFITE, CONTACT OF THE LATTER WITH A WEAK ANION EXCHANGER, FOR EXAMPLE AN AMINE OR A POLYMERIC AMINE, PERIODIC REGERNATION OF THE EXHANGER BY MEANS OF AMONIA, RECYCLING OF THE ABSORPTION SOLUTION AND CONVERSION OF THE RECOVERED AMONIUM SULFITE TO SULFUR. THE SO DEFINED PROCESS HAS LOW POWER REQUIREMENTS AND YIELDS SULFUR PRACTIVALLY FREE OF BY-PRODUCTS.
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