US 7,381,393 B2 Jun. 3, 2008
(54) PROCESS FOR SULFUR REMOVAL SUITABLE FOR TREATING HIGH-PRESSURE GAS STREAMS
(75) Inventor: Scott Lynn, Pleasant Hill, CA (US)
(73) Assignee: The Regents of the University of California, Oakland, CA (US)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 153 days.
(21) Appl. No.: 10/961,354
(22) Filed: Oct. 7, 2004
(65) Prior Publication Data
US 2006/0078491 Al Apr. 13, 2006
(51) Int. CI.
C01B 17/04 (2006.01)
C01B 17/05 (2006.01)
(52) U.S. CI 423/574.1; 423/575
(58) Field of Classification Search 423/574.1,
See application file for complete search history. (56) References Cited
U.S. PATENT DOCUMENTS 3,170,766 A * 2/1965 Townsend 422/189
H2S-containing gases, particularly such gases at elevated pressure, are treated to remove H2S by reaction in a liquid medium with S02, the S02 being present in stoichiometric excess with respect to the H2S. The S02 is produced by combustion of sulfur, preferably sulfur produced in the reaction between H2S and S02, preferably with oxygen. The process produces a treated gas that is substantially free of both H2S and S02. An acid-gas absorber/stripper system or other system typically found in such processes to raise or concentrate the H2S level in the gas to be treated, is not needed in operations according to the invention.
29 Claims, 4 Drawing Sheets