Patent ID: 6174510
Filing Date: 2001-01-16
Classification: C01B

Abstract:
A process for the absorbing of a hot, dry gas stream of sulfur trioxide (SO.sub.3) in a stream of strong sulfuric acid, said process comprising:passing said hot, dry gas stream of SO.sub.3 into a sulfuric acid tower above a packed bed held within said tower and below a liquid collection floor;introducing said stream of strong sulfuric acid into said sulfuric acid tower above said packed bed and allowing said SO.sub.3 and strong sulfuric acid to pass co-currently down through said packed bed thereby allowing said SO.sub.3 to be absorbed in said stream of strong sulfuric acid as it also passes downwardly through said packed bed thereby producing a liquid stream of concentrated sulfuric acid and a spent gas stream, said packed bed being supported on a packing support located at a base of said packed bed above a lower plenum;removing concentrated sulfuric acid from a bottom of said tower;passing said spent gas stream upwardly through a gas conduit to an upper plenum located above said liquid collection floor through a center tube positioned centrally in said packed bed;passing said spent gas stream upwardly through said upper plenum into a mist eliminator to remove any mist and to pass dry gas out of a top of the reactor while passing any acid collected on said liquid floor downwardly into said packed bed below the upper surface thereof.