Condensing sulfuric acid vapours to produce sulfuric acid

C - Chemistry – Metallurgy – 01 – B

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C01B 17/76 (2006.01) B01D 53/86 (2006.01) C01B 17/80 (2006.01)

Patent

CA 1338815

When condensing sulfuric acid from gases containing sulfuric acid vapour and steam in excess, e.g. originating from a power station, a substantial decrease of the amount minute droplets of sulfuric acid (the socalled acid mist) escaping to the surroundings is obtained, even in cases where the sulfuric acid plant is equipped with an aerosol filter, if minute nucleation cores are incorporated into the gas in an amount of 109 to 1012 solid aprticles per Nm3 per 0.1% H2SO4-vapour in the gas. The nucleation cores may, e.g., be generated by combusting hydrocarbons with >2 carbon atoms or silicones, or added as smoke from an electric arc or welding.

602164

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