CA2773021C - Extraction of bitumen from oil sands - Google Patents
Extraction of bitumen from oil sands Download PDFInfo
- Publication number
- CA2773021C CA2773021C CA2773021A CA2773021A CA2773021C CA 2773021 C CA2773021 C CA 2773021C CA 2773021 A CA2773021 A CA 2773021A CA 2773021 A CA2773021 A CA 2773021A CA 2773021 C CA2773021 C CA 2773021C
- Authority
- CA
- Canada
- Prior art keywords
- bitumen
- oil sands
- carbon disulfide
- oil
- solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000010426 asphalt Substances 0.000 title claims abstract description 33
- 238000000605 extraction Methods 0.000 title claims description 8
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 claims abstract description 64
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000003054 catalyst Substances 0.000 claims description 2
- 229910017052 cobalt Inorganic materials 0.000 claims 1
- 239000010941 cobalt Substances 0.000 claims 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims 1
- 239000002904 solvent Substances 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 24
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- JJWKPURADFRFRB-UHFFFAOYSA-N carbonyl sulfide Chemical compound O=C=S JJWKPURADFRFRB-UHFFFAOYSA-N 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003911 water pollution Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910001182 Mo alloy Inorganic materials 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- QGJOPFRUJISHPQ-NJFSPNSNSA-N carbon disulfide-14c Chemical compound S=[14C]=S QGJOPFRUJISHPQ-NJFSPNSNSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 150000001869 cobalt compounds Chemical class 0.000 description 1
- WHDPTDWLEKQKKX-UHFFFAOYSA-N cobalt molybdenum Chemical compound [Co].[Co].[Mo] WHDPTDWLEKQKKX-UHFFFAOYSA-N 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000012053 oil suspension Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
- C10G1/04—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal by extraction
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
- C10G1/002—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal in combination with oil conversion- or refining processes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G45/00—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds
- C10G45/02—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
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 treated in a thermal reaction to reduce viscosity and then fractionated to recover the bitumen.
Description
= CA 02773021 2012-03-30 TITLE
EXTRACTION OF BITUMEN FROM OIL SANDS
FIELD OF THE INVENTION
EXTRACTION OF BITUMEN FROM OIL SANDS
FIELD OF THE INVENTION
[0002] A process is provided for the extraction of bitumen from oil sands employing carbon disulfide as a solvent. In the process, oil sands are contacted with carbon disulfide to dissolve the hydrocarbon contained in the sands. Next, the resulting solution of hydrocarbon is treated to reduce viscosity, and then fractionated to recover the bitumen.
BACKGROUND OF THE INVENTION
[0003j Oil sands are growing in importance as a source of petroleum. Oil sands are found in various parts of the globe, but the most significant deposits occur in northern Alberta, Canada, along the Athabasca River. The composition of oil sands is a mixture of quartz, clay, water and about ten percent heavy oil with a consistency of tar and known in the industry as bitumen.
f00041 The accepted practice for extracting bitumen from oil sands is to mix the sands with hot water and caustic to form an oil emulsion that is siphoned off from the solids. The mineral tailings are discarded after about 95 percent of the oil has been recovered. The extracted oil is upgraded by one of two processes to produce a synthetic crude oil that is suitable for refilling at a later stage.
=
100051 While current technology is workable, it has some drawbacks, particularly as practiced on a large scale. Water pollution is caused by the discharge of substantial quantities of wastewater. The energy efficiency of the process is poor. Lastly, the required investment in plant and equipment is considerable.
[0006] The object of the present invention is to provide an improved bitumen extraction process which is more cost-effective, meets environmental concerns and provides a product of the highest quality. This object, as well as other features and advantages of the present invention, will be apparent from the following description which is based on the single drawing figure that is included.
[00071 Other applications of the present invention will become apparent to those skilled in the art when the following description of the best mode contemplated for practicing the invention is read in conjunction with the accompanying drawing.
SUMMARY OF THE DISCLOSURE
[00081 The present invention comprises steps for the extraction of bitumen from oil sands. First, the oil sands are mixed with carbon disulfide to dissolve the oil and extract it from the solid material. Next, the solution is treated to reduce viscosity, and finally the solution is fractionated to recover the bitumen. The treatment to reduce viscosity is preferably carried out by way of a thermal reaction.
[0009] The process is carried out for the most part under anhydrous conditions. In this manner, water pollution from the discharge in tailings is avoided.
Additionally, the recovery of oil is enhanced. Finally, by recycling carbon disulfide to the extraction steps, its consumption is kept to a minimum.
BRIEF SUMMARY OF THE DRAWING
[0010] The description herein makes reference to the accompanying drawing wherein like reference numerals refer to like parts throughout the several views and wherein:
109111 Fig. 1 is a block diagram showing three steps of the process, including extraction, fractionation, and hydrotreating.
DETAILED DESCRIPTION OF THE PROCESS
100121 The oil contained in oil sands is a heavy, viscous hydrocarbon mixture not unlike tar. With the nomenclature of bitumen, this oil contains molecules with twenty or more carbon atoms. By contrast, light sweet crude, the premium feed to refineries, is mostly made up of compounds with five to twenty carbon atoms. Bitumen is further characterized by its content of aromatic compounds in addition to aliphatic hydrocarbons. Bitumen also contains substantial quantities of bound sulfur.
100131 Given the nature of bitumen, this raw material presents difficult problems in its recovery from oil sands. As already mentioned, the prior art depends on forming a water-oil suspension that is separated from the solids by flotation. Alternatively, bitumen can be heated to a high temperature, in excess of 538 C, to reduce its viscosity to a point where it will flow. This approach is used for in-situ recovery of oil from oil sands that lie too deep in the ground to be dug up by strip mining.
100141 For this process, I use carbon disulfide as a solvent for the bitumen. Carbon disulfide is an excellent solvent for this purpose: it is completely miscible with hexane as well as xylene. Up to 20 gm. of paraffin wax and as much as 40 gm. of naphthalene can be dissolved in 100 gm. of carbon disulfide at 20 C.
100151 The low viscosity of carbon disulfide is also an advantage. At 20 C., its viscosity is 0.32 centipoises. This value compares with about 20,000 centipoises and up for bitumen. The viscosities of solutions can be determined by experiment or calculated from standard formulas.
Further enhancing its ability to extract bitumen, carbon disulfide can be employed in countercurrent equipment.
100161 The cost of carbon disulfide is a major concern even though the reuse of solvent is assumed. To mine substantial quantities of oil sands cost-effectively requires that the solvent
BACKGROUND OF THE INVENTION
[0003j Oil sands are growing in importance as a source of petroleum. Oil sands are found in various parts of the globe, but the most significant deposits occur in northern Alberta, Canada, along the Athabasca River. The composition of oil sands is a mixture of quartz, clay, water and about ten percent heavy oil with a consistency of tar and known in the industry as bitumen.
f00041 The accepted practice for extracting bitumen from oil sands is to mix the sands with hot water and caustic to form an oil emulsion that is siphoned off from the solids. The mineral tailings are discarded after about 95 percent of the oil has been recovered. The extracted oil is upgraded by one of two processes to produce a synthetic crude oil that is suitable for refilling at a later stage.
=
100051 While current technology is workable, it has some drawbacks, particularly as practiced on a large scale. Water pollution is caused by the discharge of substantial quantities of wastewater. The energy efficiency of the process is poor. Lastly, the required investment in plant and equipment is considerable.
[0006] The object of the present invention is to provide an improved bitumen extraction process which is more cost-effective, meets environmental concerns and provides a product of the highest quality. This object, as well as other features and advantages of the present invention, will be apparent from the following description which is based on the single drawing figure that is included.
[00071 Other applications of the present invention will become apparent to those skilled in the art when the following description of the best mode contemplated for practicing the invention is read in conjunction with the accompanying drawing.
SUMMARY OF THE DISCLOSURE
[00081 The present invention comprises steps for the extraction of bitumen from oil sands. First, the oil sands are mixed with carbon disulfide to dissolve the oil and extract it from the solid material. Next, the solution is treated to reduce viscosity, and finally the solution is fractionated to recover the bitumen. The treatment to reduce viscosity is preferably carried out by way of a thermal reaction.
[0009] The process is carried out for the most part under anhydrous conditions. In this manner, water pollution from the discharge in tailings is avoided.
Additionally, the recovery of oil is enhanced. Finally, by recycling carbon disulfide to the extraction steps, its consumption is kept to a minimum.
BRIEF SUMMARY OF THE DRAWING
[0010] The description herein makes reference to the accompanying drawing wherein like reference numerals refer to like parts throughout the several views and wherein:
109111 Fig. 1 is a block diagram showing three steps of the process, including extraction, fractionation, and hydrotreating.
DETAILED DESCRIPTION OF THE PROCESS
100121 The oil contained in oil sands is a heavy, viscous hydrocarbon mixture not unlike tar. With the nomenclature of bitumen, this oil contains molecules with twenty or more carbon atoms. By contrast, light sweet crude, the premium feed to refineries, is mostly made up of compounds with five to twenty carbon atoms. Bitumen is further characterized by its content of aromatic compounds in addition to aliphatic hydrocarbons. Bitumen also contains substantial quantities of bound sulfur.
100131 Given the nature of bitumen, this raw material presents difficult problems in its recovery from oil sands. As already mentioned, the prior art depends on forming a water-oil suspension that is separated from the solids by flotation. Alternatively, bitumen can be heated to a high temperature, in excess of 538 C, to reduce its viscosity to a point where it will flow. This approach is used for in-situ recovery of oil from oil sands that lie too deep in the ground to be dug up by strip mining.
100141 For this process, I use carbon disulfide as a solvent for the bitumen. Carbon disulfide is an excellent solvent for this purpose: it is completely miscible with hexane as well as xylene. Up to 20 gm. of paraffin wax and as much as 40 gm. of naphthalene can be dissolved in 100 gm. of carbon disulfide at 20 C.
100151 The low viscosity of carbon disulfide is also an advantage. At 20 C., its viscosity is 0.32 centipoises. This value compares with about 20,000 centipoises and up for bitumen. The viscosities of solutions can be determined by experiment or calculated from standard formulas.
Further enhancing its ability to extract bitumen, carbon disulfide can be employed in countercurrent equipment.
100161 The cost of carbon disulfide is a major concern even though the reuse of solvent is assumed. To mine substantial quantities of oil sands cost-effectively requires that the solvent
3 =
used, be cheap. Fortunately, carbon disulfide can be synthesized from plentiful materials that are found in the oil sands deposits. It can be produced in an electric furnace from elemental sulfur and petroleum coke. Alternatively, it can be formed from carbonyl sulfide, which in turn is made from sulfur dioxide and carbon monoxide.
100171 The solution of bitumen in carbon disulfide is ultimately fractionated to recover the bitumen. This step is most easily accomplished by distillation. Bitumen has a high boiling point whereas carbon disulfide boils at 46.25 C. under 1 atmosphere pressure.
Notwithstanding the ease of separation, some residual carbon disulfide can be expected to remain in the bitumen.
[00181 Because of the high viscosity of the solution, it is preferably treated before fractionating. This can be done through hydrotreating. This step entails the reaction of the bitumen solution with hydrogen at elevated temperatures, in the range of 2000 C. to 300 C. A
catalyst may or may not be used. Cobalt compounds, including cobalt-molybdenum alloys, have been found to be effective in this application.
[0019] The reaction that takes place when carbon disulfide is treated with hydrogen is shown by the following equation.
CS2 + 4 II2 CH4 + 2 H2S
where CS2 is carbon disulfide, H2 is hydrogen, Cl-I4 is methane, and 112S is hydrogen sulfide.
The thermodynamics for this reaction is extremely favorable under operating conditions so that it goes to completion.
[0020] The hydrotreating step is integrated into the upgrading of bitumen.
Because bitumen is so viscous, it cannot be pumped or processed in its existing state.
Therefore, one of two processes is generally employed to reduce its viscosity: coking and hydrotreating. Both measures can be taken. The result is a synthetic crude oil that is acceptable for further processing.
[0021] A better understanding of the process can be gained by reference to Fig. 1. Oil sands, the ore process in the process, and the carbon disulfide are fed to extractor 1. The resulting solution is passed to hydrotreator 2, while the tailings are discarded. Bitumen from unit
used, be cheap. Fortunately, carbon disulfide can be synthesized from plentiful materials that are found in the oil sands deposits. It can be produced in an electric furnace from elemental sulfur and petroleum coke. Alternatively, it can be formed from carbonyl sulfide, which in turn is made from sulfur dioxide and carbon monoxide.
100171 The solution of bitumen in carbon disulfide is ultimately fractionated to recover the bitumen. This step is most easily accomplished by distillation. Bitumen has a high boiling point whereas carbon disulfide boils at 46.25 C. under 1 atmosphere pressure.
Notwithstanding the ease of separation, some residual carbon disulfide can be expected to remain in the bitumen.
[00181 Because of the high viscosity of the solution, it is preferably treated before fractionating. This can be done through hydrotreating. This step entails the reaction of the bitumen solution with hydrogen at elevated temperatures, in the range of 2000 C. to 300 C. A
catalyst may or may not be used. Cobalt compounds, including cobalt-molybdenum alloys, have been found to be effective in this application.
[0019] The reaction that takes place when carbon disulfide is treated with hydrogen is shown by the following equation.
CS2 + 4 II2 CH4 + 2 H2S
where CS2 is carbon disulfide, H2 is hydrogen, Cl-I4 is methane, and 112S is hydrogen sulfide.
The thermodynamics for this reaction is extremely favorable under operating conditions so that it goes to completion.
[0020] The hydrotreating step is integrated into the upgrading of bitumen.
Because bitumen is so viscous, it cannot be pumped or processed in its existing state.
Therefore, one of two processes is generally employed to reduce its viscosity: coking and hydrotreating. Both measures can be taken. The result is a synthetic crude oil that is acceptable for further processing.
[0021] A better understanding of the process can be gained by reference to Fig. 1. Oil sands, the ore process in the process, and the carbon disulfide are fed to extractor 1. The resulting solution is passed to hydrotreator 2, while the tailings are discarded. Bitumen from unit
4 2 is fractionated at unit 3 to produce synthetic crude oil. The carbon disulfide from the fractionator 3 is recycled to extractor 1, [00221 Making improvements in the processing of oil sands is particularly urgent because the industry is expanding at a breakneck pace. Practices that have been accepted in the past cannot deliver the results demanded by current conditions. The present invention is ideal for meeting the tremendous growth that is forecast.
Example 100231 The viscosity of a solution of bitumen in carbon disulfide was calculated using the following expression:
log (I) = xA log + Xg log (Dg where (1) is fluidity, the reciprocal of the coefficient of viscosity, and x is the mole fraction.
(00241 For a solution in which the mole fraction of bitumen is 0.1, the viscosity equals 0.90 centipoises. This result compares with the viscosity of 1.0 centipoises for water.
Example 100231 The viscosity of a solution of bitumen in carbon disulfide was calculated using the following expression:
log (I) = xA log + Xg log (Dg where (1) is fluidity, the reciprocal of the coefficient of viscosity, and x is the mole fraction.
(00241 For a solution in which the mole fraction of bitumen is 0.1, the viscosity equals 0.90 centipoises. This result compares with the viscosity of 1.0 centipoises for water.
Claims
1. A process for the extraction of bitumen from oil sands comprising the steps of (a) contacting the oil sands with carbon disulfide to put the bitumen into solution, (b) separating the oil sands from the solution, (c) hydrotreating the solution as a thermal reaction in the presence of a cobalt-containing catalyst to reduce viscosity, and (d) fractionating the reduced viscosity solution to recover the bitumen
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2773021A CA2773021C (en) | 2012-03-30 | 2012-03-30 | Extraction of bitumen from oil sands |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2773021A CA2773021C (en) | 2012-03-30 | 2012-03-30 | Extraction of bitumen from oil sands |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2773021A1 CA2773021A1 (en) | 2013-09-30 |
| CA2773021C true CA2773021C (en) | 2015-11-17 |
Family
ID=49289810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2773021A Expired - Fee Related CA2773021C (en) | 2012-03-30 | 2012-03-30 | Extraction of bitumen from oil sands |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2773021C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103923686A (en) * | 2014-04-21 | 2014-07-16 | 西南石油大学 | Composite solvent for room-temperature extraction and separation of oil sand |
-
2012
- 2012-03-30 CA CA2773021A patent/CA2773021C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2773021A1 (en) | 2013-09-30 |
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| MKLA | Lapsed |
Effective date: 20220330 |