Process for condensation of sulphuric acid vapours to...

Details Process for condensation of sulphuric acid vapours to... Process for condensation of sulphuric acid vapours to...

2007-08-07

2007-08-07

Vanoy, Timothy C. (Department: 1754)

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

C423S523000, C423S529000

Reexamination Certificate

active

10732222

ABSTRACT:
A process for production of sulphuric acid comprising condensing sulphuric acid vapour from a gas mixture containing 0.01 to 10 vol. % of H2SO4vapour calculated at complete hydration of SO3in the gas to H2SO4and 0 to 50 vol. % of water vapour by cooling of the gas in a sulphuric acid tower, wherein a stream containing NH3is added upstream of the tower in an amount corresponding to 0.01-100 ppm NH3by vol. in the gas stream at the entry of the tower.

REFERENCES:
patent: 4348373 (1982-09-01), Schoubye
patent: 4696804 (1987-09-01), Shinoda et al.
patent: 5108731 (1992-04-01), Schoubye
patent: 5122352 (1992-06-01), Johnson
patent: 5198206 (1993-03-01), Schoubye
patent: 5683670 (1997-11-01), Peng
patent: 21 22 634 (1972-11-01), None
patent: WO 89/12024 (1989-12-01), None
patent: WO 89/12025 (1989-12-01), None

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