The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 11, 2003
Filed:
Oct. 30, 2001
Scott Lynn, Pleasant Hill, CA (US);
The Regents of the University of California, Oakland, CA (US);
Abstract
H S is removed from an H S-rich gas, and sulfur is produced, by a process in which the H S-rich gas is reacted with SO in a reactor in the presence of an organic solvent and a catalyst, an H S-containing off-gas is removed from the reactor and is combusted to produce an SO -rich combustion gas. Preferably, the reactor off-gas is combusted with a substoichiometric amount of oxygen so that the combustion gas also contains water vapor and sulfur vapor. The combustion gas is cooled by direct quench or indirect heat exchange to produce an aqueous stream comprising primarily water and containing suspended solid sulfur and polythionic acids, e.g., a Wackenroder's liquid, and the aqueous stream is used to provide cooling for the H S—SO reaction. Problems associated with production and handling of Wackenroder's liquids are overcome and sulfur values in these materials are recovered.