04929341 is referenced by 78 patents and cites 6 patents.

Oil bearing soil is contacted in a contacting zone with a liquid medium comprising water and a lipophilic solvent which is miscible or soluble with water. The medium can include a yield improving agent comprising a water soluble acidic ionic salt or a water soluble ionic acid. The contacting produces an emulsion which comprises the oil from the oil bearing soil and the liquid medium. The inorganic portion of the soil is dispersed in the emulsion and it is separated from the emulsion by gravity or other suitable means. The emulsion is broken by an emulsion breaking agent into two phases. The two phases are allowed to separate into two layers. The first layer comprises the oil and minor amounts of the liquid medium. The second layer comprises the liquid medium and minor amounts of the oil. The first layer is then recovered. The medium from the second layer can be recycled into the contacting zone.

Title
Process and system for recovering oil from oil bearing soil such as shale and tar sands and oil produced by such process
Application Number
416507
Publication Number
4929341
Application Date
April 28, 1986
Publication Date
May 29, 1990
Inventor
M Jeersannidhi Narasimhan Jr
Walnut Creek
CA, US
M Jeersannidhi Thirumalachar
Walnut Creek
CA, US
Agent
Willian Brinks Olds Hofer Gilson & Lione
Assignee
Source Technology Earth Oils
CA, US
IPC
C10G 1/00
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