Sulfur recovery process

Details Sulfur recovery process Sulfur recovery process

2009-08-26

2010-10-12

Vanoy, Timothy C (Department: 1793)

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

C423S574100, C423S576200, C422S129000, C422S187000, C422S186220

Reexamination Certificate

active

07811544

ABSTRACT:
A method for recovering sulfur from a sulfur-bearing process gas stream in which a process gas stream comprising H2S and/or SO2is contacted with a lean mixture of a lean UCSRP solution and a catalyst for promotion of a reaction between H2S and SO2in anon-UCSRP vessel at a temperature below which H2S and SO2react, whereby at least a portion of the H2S and/or SO2is absorbed by the lean UCSRP solution, forming a rich mixture of a rich UCSRP solution and the catalyst. The rich mixture is introduced into a UCSRP vessel and heated to a reaction temperature greater than or equal to a melting temperature of sulfur, forming elemental sulfur and H2O.

REFERENCES:
patent: 6495117 (2002-12-01), Lynn
patent: 6645459 (2003-11-01), Lynn
patent: 7381393 (2008-06-01), Lynn
patent: 2003/0082096 (2003-05-01), Lynn

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