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. 21, 2006
Filed:
Jan. 12, 2005
Alfred E. Keller, Ponca City, OK (US);
Sriram Ramani, Ponca City, OK (US);
Alfred E. Keller, Ponca City, OK (US);
Sriram Ramani, Ponca City, OK (US);
Conocophillips Company, Houston, TX (US);
Abstract
Apparatus and process for recovering elemental sulfur from a HS-containing waste gas stream are disclosed. The apparatus preferably comprises a first reaction zone for carrying out the catalytic partial oxidation of HS, a second reaction zone for the catalytic partial reduction of any incidental SOproduced in the first reaction zone, and a cooling zone including a sulfur condenser. According to a preferred embodiment of the process, a mixture of HS and Ocontacts a catalyst in the first reaction zone very briefly (i.e, less than about 200 milliseconds) producing primarily Sand HO. Some SOis also present in the first stage product gas mixture. A reductant gas (e.g. CO, or CHor natural gas) is fed together with the first stage product gas mixture to a second catalytic reaction zone where the partial reduction of the SOcomponent to elemental sulfur and COis carried out.