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Title | Date | Subject | Description |
| 26 |
 |
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... |
| 27 |
 |
Method for recovering bitumen from tar sand | 1982-05-25 | bitumen recovery; tar sand | In recovering bitumen from tar sand by separation using an aqueous liquid, contamination of the aqueous phase with dispersed, finely divided solids is prevented by a mild heat treatment of the bituminous sand to reduce its water content before the sand is contacted with the aqueous liquid. |
| 28 |
 |
Method for treating a tar sand reservoir to enhance petroleum production by cyclic steam stimulation | 1986-08-26 | tar sand drainage; patent; enhanced petroleum production; cyclic steam stimulation; tar sand treatment | A method for conditioning the virgin drainage area of a tar sand formation that is penetrated by a well for enhanced petroleum production by cyclic steam stimulation is described. The method comprises fracturing the drainage area by injection of liquid carbon dioxide. While carbon dioxide is still i... |
| 29 |
 |
Method of extracting liquid and gaseous fuel from oil shale and tar sand | 1981-05-12 | liquid extraction; gaseous fuel; oil shale; tar sand; patent | Kerogen and other combustible matter can be extracted from an area of oil shale or tarsand by drilling boreholes in a selected pattern through the overlying soil and rock without removing it. Each borehole mouth is tightly closed by a cover provided with an air inlet pipe and a gas exhaust pipe. In ... |
| 30 |
 |
Method of processing oil-shale or tar sand | 1982-03-16 | oil shale; tar sand; hydrogenating carbonization | Oil-shale or tar sand is subjected to hydrogenating carbonization and the residue is passed into a combustion zone wherein residual coke in the residue is reacted with oxygen. At least part of the heat produced in the combustion zone is used to heat the hydrogen to be used for the carbonization step... |
| 31 |
 |
Method of producing tar sand deposits containing conductive layers | 1990-05-22 | tar sand deposits; conductive layers; patent | A method is disclosed for producing thick tar sand deposits by preheating of thin, relatively conductive layers which are a small fraction of the total thickness of a tar sand deposit. The thin conductive layers serve to confine the heating within the tar sands to a thin zone adjacent to the conduct... |
| 32 |
 |
Method of recovering viscous petroleum from tar sand | 1976-11-30 | Patent; Viscous petroleum recovery; Tar sands | Recovery of viscous petroleum such as from tar sands is assisted using a substantially vertical passage from the earth's surface which penetrates the tar sand and has extending therefrom a lateral hole containing a flow path isolated from the tar sand for circulating a hot fluid to and from the vert... |
| 33 |
 |
Method of recovering viscous petroleum from thick tar sand | 1977-02-22 | Patent; Viscous petroleum recovery; Thick tar sand | Recovery of viscous petroleum such as from thick tar sands is assisted using a closed-loop flow path formed in a well by concentric casing and tubular members extending from the earth's surface through a substantial portion of the formation for conducting hot fluid to reduce the viscosity of the pet... |
| 34 |
 |
Method of recovery of bitumen from tar sand formations | 1977-01-18 | Patent; Bitumen recovery; Tar sand formation | A competent permeable communication zone connecting injection and production wells completed in a tar sand which communication zone will be rigid and will not tend to slump or heal may be developed by injecting a fluid in the injection well under such pressure so as to fracture the tar sand formatio... |
| 35 |
 |
Method of reducing moisture and solid content of bitumen extracted from tar sand minerals | 2000-02-01 | Tar sand; Alkoxyalkylphenol alkoxylate surfactant; Recoverable hydrocarbon; Anionic and cationic flocculant; Bitumen; Moisture reduction | Tar sand is upgraded to produce a hydrocarbon having a low concentration of water and solids by contacting a bitumen/diluent mix with an alkoxyalkylphenol alkoxylate surfactant prior to separation of a recoverable hydrocarbon phase. The separation of the bitumen/diluent mix into a recoverable hydroc... |
| 36 |
 |
Method of removing bitumen from tar sand for subsequent recovery of the bitumen | 1977-10-18 | Bitumen removal; Tar sand; Bitumen recovery; Sonicating; Sand granules | A method of removing bitumen from tar sand for subsequent recovery of the bitumen. The method comprises submerging tar sand in a sufficient amount of a circulating solvent in which the bitumen is soluble, and, while the tar sand is so submerged, sonicating within the solvent with a sufficient amount... |
| 37 |
 |
Method of removing bitumen from tar sand utilizing ultrasonic energy and stirring | 1977-10-18 | Bitumen removal; Tar sand; Ultrasonic energy; stirring; Bitumen recovery | A method of removing bitumen from tar sand for subsequent recovery of the bitumen. The method comprises contacting tar sand with an excess of solvent in which the bitumen is soluble, said contacting being performed within a vessel wherein simultaneously the solvent is being stirred and ultrasonic en... |
| 38 |
 |
Method of separating bitumen from tar sand with cold solvent | 1976-11-23 | Bitumen; Tar sand; Separation; Solvent extraction; Cold solvent | A method for separating bitumen from tar sand by solvent extraction with efficient separation of water from the recovered bitumen is disclosed. Tar sand may often be recovered by surface mining techniques. The tar sand is comprised of bitumen, water and sand including clays. The tar sand is contacte... |
| 39 |
 |
Methods of tar sand bitumen recovery | 1992-09-01 | Bitumen recovery; Tar sand; Water displacement extraction; Patent | Methods for the recovery of bitumen from tar sands comprising the steps of mixing tar sand, solvent and a displacing amount of aqueous medium to form a mixture, followed by separating a bitumen-rich solvent phase from the mixture and recovering bitumen from the bitumen-rich solvent phase are disclos... |
| 40 |
 |
Monitoring surfactant content to control hot water process for tar sand | 1991-04-23 | Patent; Hot water process; Tar sand; Extraction; Surfactants | The present invention is based on the following: (1) that when tar sand is conditioned and diluted in the hot water extraction process, there are two classes of anionic surfactants (originating from carboxylate and sulfonate groups) present in the process water; (2) that each of these surfactants ha... |
| 41 |
 |
Multiple drain method for recovering oil from tar sand | 2001-07-24 | Patent; Thermal method; Immobile hydrocarbon oil; Subsurface tar sand deposit; Bore holes | A thermal method is described for recovering normally immobile hydrocarbon oil from a subsurface tar sand deposit. The procedure comprises: (a) establishing at least one substantially vertical production bore hole extending from the surface of the earth to at least the bottom of said subsurface form... |
| 42 |
 |
Pour-point depression of crude oils by addition of tar sand bitumen | 1988-03-03 | crude oil; raw bitumen; hydrotreated bitumen; pour-point of crude oils | The present invention provides a process for reducing the pour point of a crude oil by adding a pour-point depressant selected from the group consisting of raw bitumen and hydrotreated bitumen to form a blend possessing a relatively lower pour point. |
| 43 |
 |
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... |
| 44 |
 |
Process and apparatus for separating tar from a tar sand mixture | 1981-02-10 | separating tar from a tar sand mixture; patent; tar sand | A process and apparatus for separating tar from a tar sand mixture. The separating step is by a novel mechanical process avoiding the complication of heating, freezing and the use of solvents. In the process a suitable suspension liquid is added to a tar sand mixture which is then struck with a plur... |
| 45 |
 |
Process for recovering bitumen from tar sand | 1980-12-02 | oil sand; slurry; bitumen; bitumen recovery | Oil sand is mixed with steam and water in a tumbler to produce a slurry. The slurry is then transferred to the immersed portion of an apertured inclined surface in a water bath. The inclined surface may be in the form of a rotating drum, a tilted rotating dish or an inclined moving endless conveyor ... |
| 46 |
 |
Process for recovering hydrocarbons and heavy minerals from a tar sand hot water process waste stream | 1976-11-09 | bitumen removal; bitumous froth; patent | A method for removing bitumen from mineral particles recovered from bituminous froth recovered as a product of aqueous extraction of tar sands which method comprises scrubbing the minerals with a liquid hydrocarbon solvent containing at least 10 weight percent aromatics and thereafter separating the... |
| 47 |
 |
Process for recovering products from tar sand | 1983-10-11 | physical separation process; thermal fluidized bed process; tar sands; patent | A combination physical separation process and thermal fluidized bed process for recovering products from tar sands. The process includes initially separating a portion of the sand from the tar sand through a physical separation process, yielding a bitumen-rich concentrate. The bitumen-rich concentra... |
| 48 |
 |
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... |
| 49 |
 |
Process for secondary recovery of bitumen in hot water extraction of tar sand | 1979-10-23 | patent; hot water process treatment; secondary recovery of bitumen; tar sand extraction | It has been found that tank-type air flotation cells are more efficient, when treating hot water process middlings containing in excess of about 3% bitumen, than trough-type air flotation cells. Also, it has been found that the trough-type cells are more efficient than the tank-type cells when treat... |
| 50 |
 |
Process for selective recovery of relatively metals-free bitumen from tar sand using a halogenated aliphatic solvent in combination with a second solvent | 1980-08-12 | selective recovery of tar sand bitumen; tar sand bitumen; two-solvent system; patent; metal-free bitumen | A process for the selective recovery of tar sand bitumen from tar sands using a two-solvent system comprising a halogenated aliphatic solvent in combination with a second solvent selected from an oxygenated compound. The process provides for an inexpensive method for selectively removing substantial... |
