US2010101980A1PendingUtilityA1

Extraction of bitumen from oil sands

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Individually held — no corporate assignee on recordPriority: Oct 29, 2008Filed: Oct 29, 2008Published: Apr 29, 2010
Est. expiryOct 29, 2028(~2.3 yrs left)· nominal 20-yr term from priority
Inventors:John E. Stauffer
C10G 2300/44C10G 1/002C10G 1/04
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Claims

Abstract

Carbon disulfide is used as a solvent to extract bitumen from oil sands in an anhydrous countercurrent flow process that is compatible with existing procedures for upgrading bitumen. The solution is then fractionated to separate the carbon disulfide from the bitumen product. The bitumen is then treated with hydrogen to decompose the remaining carbon disulfide. The process should provide high yields and meet environmental concerns.

Claims

exact text as granted — not AI-modified
1 . A process for the extraction of bitumen from oil sands comprising the steps of:
 dissolving the bitumen in carbon disulfide to produce a solution;   fractionating the resulting solution to recover bitumen and carbon disulfide; and   hydrotreating the recovered bitumen to remove remnants of carbon disulfide.   
   
   
       2 . A process according to  claim 1  in which the extraction step is achieved by countercurrent flow of carbon disulfide and oil sands. 
   
   
       3 . A process according to  claim 1  in which the fractionation is achieved by distillation. 
   
   
       4 . A process according to  claim 1  in which hydrotreating is conducted in the presence of a cobalt catalyst.

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