Treatment of waste or other material

Details Treatment of waste or other material Treatment of waste or other material

C - Chemistry, Metallurgy

01

B

C01B 17/05 (2006.01) B01J 12/00 (2006.01) C01B 17/04 (2006.01) C01B 17/58 (2006.01)

Patent

CA 2090594

91B106 ABSTRACT TREATMENT OF SULPHURIC ACID Waste sulphuric acid is dried in a drier 10 and the resulting dried acid is decomposed in a reactor 12 by contact with a volume of liquid sulphur through which oxygen is passed. The decomposition products of the sulphuric acid initially comprise water vapour and sulphur trioxide. The sulphur trioxide is reduced to sulphur dioxide by sulphur vapour. The resulting mixture comprising sulphur, sulphur dioxide and water vapour has sulphur condensed therefrom. The sulphur dioxide content of the gas mixture is reacted with hydrogen sulphide in a Claus plant 14 to form a sulphur product. Alternatively the mixture containing sulphur vapour can be reacted with a hydrocarbon such as methane to form hydrogen sulphide and carbon disulphide which in turn are reacted with the sulphur dioxide to form the sulphur product.

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