Process for recovery of sulfur values from a gas stream

Details Process for recovery of sulfur values from a gas stream Process for recovery of sulfur values from a gas stream

1990-07-02

1991-10-15

Russel, Jeffrey E.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

423222, C01B 1705

Patent

active

050572989

ABSTRACT:
The invention is a process wherein SO.sub.2 is absorbed in a concentrated solution of potassium citrate and the solution is reacted with H.sub.2 S at a temperature above the melting point of sulfur to form elemental sulfur. The reaction produces a solution lean in sulfur dioxide. SO.sub.2, in the form of a rich solution or a gas, can be introduced into the lean solution in order to inhibit post-formation of sulfur. This introduction of SO.sub.2 avoids a tendency for sulfur to form continually after the solution exits the reaction zone.

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Sulfur Removal By An Aqueous Process, M. J. Canales, Mar., 1985 pp. 1-15.
Chemistry of SO.sub.2 Absorption and Conversion to Sulfur by the Citrate Process, Korosy, et al., Apr., 1974 (17 total pp.).

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