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:
Sep. 03, 2013
Filed:
Jun. 29, 2010
Jagannathan N. Iyengar, Centreville, VA (US);
David Perry, Alexandria, VA (US);
Robert B. Fedich, Long Valley, NJ (US);
Jagannathan N. Iyengar, Centreville, VA (US);
David Perry, Alexandria, VA (US);
Robert B. Fedich, Long Valley, NJ (US);
ExxonMobil Research and Engineering Company, Annandale, NJ (US);
Abstract
A process for the removal of hydrogen sulfide from a gas stream in which the gas stream is first passed through a Claus unit operating at a sub-stoichiometric ratio (HS:SO) of greater than 2:1 to produce a tail gas stream comprising less than 2000 vppm SO. This tail gas stream is then treated to increase the sulfur recovery to at least 99.5% by first directly cooling the tail gas stream by contact with water as a coolant, followed by contacting the gas stream with a circulating stream of a dilute, absorbent solution of a severely sterically hindered secondary aminoether alcohol to further cool the gas stream, and then removing the HS from the stream using a stronger absorbent solution of a severely sterically hindered secondary aminoether alcohol.