Catalytic process for removing sulfur dioxide from gas streams

Abstract From the Canadian patent

A process for the catalytic reduction of sulfur dioxide in gas streams containing sulfur dioxide to elemental sulfur using a reducing gas such as hydrogen or, preferably, carbon monoxide and a material of the formula, xLa2O3 . yCo2o3 where x and y are varied independently from 1-3 (including non-integers). There are also novel compositions where x ? y. In a further aspect of this invention a gas stream containing hydro-, gen sulfide or carbonyl sulfide and sulfur dioxide is passed through a reaction chamber containing xLa2O3 . yCo2O3 where x and y are as set forth above, to catalytically produce at a sufficiently elevated temperature elemental sulfur with concomitant reduction of the …