Process and apparatus for separating coarse sand particles and recovering bitumen from tar sands

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Publication Type patent
Author Murray, Robert G.; Gikis, Benjamin J.
Title Process and apparatus for separating coarse sand particles and recovering bitumen from tar sands
Date 1978-10
Description A system for effecting a sharp separation from tar sands of the large weight fraction of coarse materials present therein and for recovering bitumen, or tar, from the remaining product, wherein, as a first step, finely divided particles of a tar sand are added to a liquid hydrocarbon solvent in an agitation zone to form a dilute solution of the bitumen component which is agitated to maintain both the coarse as well as the fine solid particles present in a well dispersed condition. This dispersion flows downwardly from the agitation zone and through a shallow conduit, generally rectangular in cross section and having an opening extending across its bottom portion over which the dispersion passes. During the short residence time of the dispersion over the opening, the coarse sand particles, which under the influence of gravity fall faster than the fines, selectively drop out of the dispersion and pass through the conduit opening into an underlying sand-receiving chamber. The latter is continuously provided with solvent which wells up into the bitumen solution passing overhead which still contains the fines portion of the dispersion.
Publisher United States Patent and Trademark Office
Subject sharp separation from tar sands; tar sands; bitumen recovery; patent; solvent extraction
Bibliographic Citation Murray, R. G., Gikis, B. J. (1978). Process and apparatus for separating coarse sand particles and recovering bitumen from tar sands. United States Patent 4,120,775. United States Patent and Trademark Office.
Relation Has Part United States Patent 4,120,775
ARK ark:/87278/s6m937r3
Setname ir_eua
Date Created 2015-01-23
Date Modified 2021-05-06
ID 214324
Reference URL https://collections.lib.utah.edu/ark:/87278/s6m937r3
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