Process employing single-stage reactor for recovering sulfur fro

Details Process employing single-stage reactor for recovering sulfur fro Process employing single-stage reactor for recovering sulfur fro

1997-09-10

1999-07-27

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

423575, 4232421, 423220, B01D 5352

Patent

active

059286202

ABSTRACT:
Elemental sulfur is recovered from the hydrogen sulfide present in natural gas or other process gases by passing the hydrogen sulfide contaminated gas through a hydrogen sulfide absorber so as to obtain a natural or other process gas having a diminished amount of hydrogen sulfide and stripping the hydrogen sulfide out the resulting hydrogen sulfide rich solution so as to obtain a hydrogen sulfide rich gas; feeding the hydrogen sulfide rich gas and sulfur dioxide into a reactor so that the following reaction takes occurs, 2H.sub.2 S+SO.sub.2 .fwdarw.3/2S.sub.2 +2H.sub.2 O under such conditions that there is approximately a 50 percent stoichiometric excess of hydrogen sulfide; combusting the residual, unreacted hydrogen sulfide to convert it into sulfur dioxide, and passing the resulting sulfur dioxide back into the reactor where the reaction between hydrogen sulfide and sulfur dioxide occurs.

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M.P.Quinlan et al., "Technical and Economic Comparison of LO-CAT II with Other Iron-Based Liquid Redox Processes," GRI Liquid Redox Sulfur Recovery Conference, Austin, TX, (Oct. 4-6, 1992).

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