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| Title | Date | Subject | Description | ||
|---|---|---|---|---|---|
| 1 |
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Method and appratus for extracting tar sand | 1983-11-22 | tar sand extraction; extraction method; patent; tar sand; extraction apparatus | Method and apparatus for separating coarse sand particles from fine sand particles in a slurry of sand and a solution such as results from the solvent extraction of tar sand, such method comprising causing flow of such slurry in a generally horizontal direction and then causing upward flow at a rate... |
| 2 |
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Process and apparatus for separating coarse sand particles and recovering bitumen from tar sands | 1978-10 | sharp separation from tar sands; tar sands; bitumen recovery; patent; solvent extraction | 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 a... |
| 3 |
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Apparatus for extracting bitumen from tar sand | 1982-01-19 | Patent; Extracting bitumen from tar sand; Extraction chambers; Countercurrent flow; Plurality; Individually sealed pressure adjusted interconnected extraction chambers in series; Tar sand; Bitumen | A method and apparatus for extracting bitumen from tar sand utilizes a plurality of individually sealed pressure adjusted interconnected extraction chambers in which the tar sand flows countercurrent to the flow of solvent with mixing in each extraction chamber of solvent and tar sand. Tar sand is p... |
| 4 |
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Process for recovery of solvent from tar sand bitumen | 1985-07-30 | solvent recovery from tar sand bitumen; tar sand bitumen; patent; bitumen extraction | There is described a process based on unit operations conventionally employed but modified to enable the use of chlorinated solvents, particularly methylene chloride as the preferred solvent for extraction of the bitumen from the tar sands or shale. The process in general constitutes: I. an extracti... |
| 5 |
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Method for filtering solvent and tar sand mixtures | 1985-09-03 | filtering solvent; filtering tar sand mixtures; tar sand; paten | A method for filtering spent tar sands from a bitumen and organic solvent solution comprises separating the solution into two streams wherein the bulk of the coarser spent tar sand is in a first stream and has an average particle size of about 10 to about 100 mesh and the bulk of the finer spent tar... |
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