Reducing SO.sub.2 in refinery off gas

Chemistry of inorganic compounds – Sulfur or compound thereof – Binary compound

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423228, 423573G, C01B 1716, C01B 1702

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active

041235053

ABSTRACT:
Conventionally H.sub.2 S laden gases are amine scrubbed, the H.sub.2 S sprung from the amine, converted to sulfur in the Claus process and the tail gas from the Claus process scrubbed in a tail gas facility such as Beavon-Stretford, Shell SCOT or IFP. The instant disclosure eliminates the aforementioned scrubbing processes by reducing SO.sub.2 in Claus tail gas with a hydrogen rich gas to H.sub.2 S and condensing water out of this reduced product. The dehydrated product having a lower sulfur level is compressed and admixed with other refinery gases in a refinery fuel gas mixing vessel and used as fuel in the refinery.

REFERENCES:
patent: 3752877 (1973-08-01), Beauon
patent: 3848071 (1974-11-01), Groenendaal
patent: 3947547 (1976-03-01), Groenendaal et al.
patent: 3985861 (1976-10-01), Hudson, Jr.
Naberje et al., Newshell Process Treats Claus Off Gas Chemical Engineering Progress, vol. 69, #12, Dec. 1973, pp. 29-34.

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