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:
Mar. 24, 2009
Filed:
Sep. 14, 2005
Jeffrey M. Dysard, Michigan City, IN (US);
Zhigou Hou, Baton Rouge, LA (US);
Jonathan M. Mcconnachie, Annandale, NJ (US);
Andrzej Malek, Baton Rouge, LA (US);
Ramesh Gupta, Berkeley Heights, NJ (US);
William E. Lewis, Baton Rouge, LA (US);
Jeffrey M. Dysard, Michigan City, IN (US);
Zhigou Hou, Baton Rouge, LA (US);
Jonathan M. McConnachie, Annandale, NJ (US);
Andrzej Malek, Baton Rouge, LA (US);
Ramesh Gupta, Berkeley Heights, NJ (US);
William E. Lewis, Baton Rouge, LA (US);
ExxonMobil Research and Engineering Company, Annandale, NJ (US);
Abstract
Refractory or hard sulfur found in a hydrocarbon stream containing refractory sulfur heterocycle compounds, particularly those exhibiting steric hindrance, is removed from the stream by contacting it with a sodium reagent comprising a sodium component, having free sodium, supported on a solid support component. If the hydrocarbon stream contains more labile or easy sulfur, then it is treated, typically by hydrodesulfurization, to remove at least most of the labile sulfur before it is contacted with the sodium reagent. This is useful for bringing the sulfur level of middle distillate fuel streams, such as diesel and jet fuel fractions, down to a level of less than about 10 wppm, employing conventional hydrodesulfurizing catalysts and conditions.