Production of sulphuric acid from a feed gas with varying...

Details Production of sulphuric acid from a feed gas with varying... Production of sulphuric acid from a feed gas with varying...

2006-04-25

2006-04-25

Silverman, Stanley S. (Department: 1754)

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

C423S243010, C423S243110, C423S522000

Reexamination Certificate

active

07033565

ABSTRACT:
A process for the production of sulphuric acid from a sulphur dioxide containing feed gas with concentration of SO2fluctuating between 0 and 100 mole % SO2comprising the steps of contacting the feed gas with an aqueous solution comprising 0–50% by weight H2SO4at a temperature between the freezing point of said aqueous solution and 80° C.; and during the contact of the feed gas with the aqueous solution absorbing at least a part of SO2in the feed gas in the aqueous solution or desorbing at least a part of SO2from the aqueous solution, wherein the at least a part of SO2is desorbed by stripping the aqueous solution with the feed gas and passing at least part of the thus treated feed gas to a sulphuric acid plant.

REFERENCES:
patent: 1823372 (1931-09-01), Merriam
patent: 3764665 (1973-10-01), Groenendaal et al.
patent: 4041131 (1977-08-01), Forbes
patent: 4213958 (1980-07-01), Cameron et al.
patent: WO 83/01438 (1983-04-01), None

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