Patent ID: 6090364
Filing Date: 2000-07-18
Classification: C01B

Abstract:
A wet gas sulphuric acid process for concentrating sulphuric acid, the processing comprising the steps of:supplying a feed stream of sulphuric acid at 150-270.degree. C., the feed stream containing 90-98% H.sub.2 SO.sub.4, into a contacting zone;contacting the feed stream with hot atmospheric air to produce a product of sulphuric acid containing 95-98.8% H.sub.2 SO.sub.4 by directly contacting the feed stream in counter current with the atmospheric air at 350-600.degree. C. to produce the sulphuric acid containing 95-98.8% H.sub.2 SO.sub.4 ; and producing an offgas containing sulphuric acid values, andpassing the sulphuric acid values through a condensing tower to obtain condensed sulphuric acid values.