Mehlberg amoco oil company naperville, illinois 60566 abstract a process has been investigated for solvent extraction of bitumen from sunnyside, utah, tar sands. Solvent treating is a widely used method of refining lubricating oils as well as a host of other refinery stocks. Process for solvent extraction of bitumen from oil sand. Apr 27, 2020 solvent extraction is a method for separating a substance from one or more others by using a solvent. This paper investigates the energy requirements and greenhouse gas ghg emissions in a. The effect of oil sands bitumen extraction conditions on froth. The solvent extracted oil, deoiled meal and edible flour. Since the liquid flow in the countercurrent column is hard. May 25, 2017 solventassisted techniques leave residual solvent underground after bitumen is extracted between 30 per cent and 50 per cent in the case of imperial oils technology tested at cold lake. Pdf supercritical solvent extraction of oil sand bitumen. Solvent extraction was applied in the separation of oil sands and considered as a promising technology. Understanding waterbased bitumen extraction from athabasca oil sands article pdf available in the canadian journal of chemical engineering 824. Solvent extraction plant solvent extraction process.
Most of these are unique patented or proprietary processes. Pdf the development of a process simulation model for. In this process, oil sand is mixed with light hydrocarbon solvents, and the solventbitumen solution is separated from the mineral solids by centrifugal filtration or regular pressure filtration. Jan 17, 20 the oil patchs solvent solution to extracting bitumen open this photo in gallery. The supporting information is available free of charge on the acs publications website at doi. The first step is the extraction with heated toluene into three. Direct hot water production for an oil sands mining. Where the raw tar sands are extracted with a solvent to form an oil and solventcontaining extract and a residue, it is advantageous to combust the residue to form clean sand and hot combustion gases. Suncors upgrading operations process bitumen into highervalue synthetic crude oil and diesel fuel using two upgraders at its oil sands site in fort mcmurray. Oil sands slurry produced in the slurry preparation plant spp contains about 5055% sand and less than 10% bitumen. Accelerated solvent extraction for bitumen extraction from oil sands. The extraction of heavy oil from trinidad tar sands using. Nowadays, oil separation by extraction is the commonest process used in vegetable oil production.
For the design basis of the extraction process, see table 5. Closed loop solvent extraction process for oil sands shell. The athabasca oil sands representing about 80% of canadas bitumen reserves also happens to be the only one shallow enough to lend itself to surface mining, which, as we will see, is the primary method for removing oil sands. The present invention is directed to a method comprising contacting an oil sand with a suitable solvent to generate a solvated oil sand slurry. Here, the slurry is put through a separation process where sand sinks to the bottom and impure bitumen froth rises to the. In analytical separations certain solvents preferentially remove one.
The volume of reservoir that is contacted during extraction. A process has been investigated for solvent extraction of bitumen from. Liquidliquid extraction, mostly used in analysis, is a technique in which a solution is brought into contact with a second solvent. An input port is provided at the upper end of the extractor tank for the purpose of introducing oil sand into the reaction chamber. Our oil sands business recovers bitumen through surface mining and steam injection technologies and upgrades it into refineryready crude oil products. The oil patchs solvent solution to extracting bitumen. Currently, 20% of oil sands reserves are accessible via mining techniques. Oil sands, tar sands, crude bitumen, or more technically bituminous sands, are a type of unconventional petroleum deposit.
Solvent extraction is carried out regularly in the laboratory by the chemists as a common purification procedure in organic synthesis. The method of the present invention may be used to produce a low ash bitumen product and dry tailings from oil sands. The process can be used to generate a lowash bitumen product and dry tailings. Request the article directly from the authors on researchgate. Optimization of sesame oil extraction process conditions. Nearly all vegetable oils, apart from olive oil, are produced in this way, ultimately appearing on the market in the form of refined vegetable oils. New extraction technique could replace sdse for bitumen. In an earlier solvent study on extraction of alberta oil sands, cyclohexane was selected as a candidate solvent, giving high recovery 94. Normally hexane a petroleum byproduct is used as a solvent.
His discovery and subsequent use of a wonderful perfume substance eventually lead him to write a book on the healing properties of essential oil of rose. Petroleum products are produced from the oil sands through 3 basic steps. How tar sands oil is produced high oil prices and technological advances have made it economically viable to ramp up oil production from. The patented process uses warm solvents to extract oilsands resources using no water and only a quarter of the greenhouse gas emissions compared with traditional technologies. Truehybrid process oil sands pretreatedwith solvent viscosity reduction, followed by water extraction process. The solvent extraction process sep is a promising technology for bitumen production from oil sands.
Petroteqs oil sands extraction process has been designed utilizing good engineering practices and confirmed chemical and physical principles. This invention relates to a solventbased process for the extraction of bitumen from oil sands. Pilot evaluation of an aqueousnonaqueous hybrid bitumen. Oil sands have been surface mined from this location since 1967. In the present study, a process for solvent extraction of bitumen from athabasca oil sands was investigated.
Results in this study indicated that the factors such as the volume of solvent to mass of oil sand vm, solvent aromatic content the amount of aromatic hydrocarbons in the solvent, and the polarity of the solvent significantly influenced the oil sands bitumen recovery. Extraction of the bitumen from the oil sands, where the solids and water are removed upgrading of the heavy bitumen to a lighter, intermediate crude oil product refining of the crude oil into final products such as gasoline, lubricants and diluents traditionally, a majority of the bitumen produced. It is demonstrated that bitumen can be separated from waterwet alberta oil sands and oilwet utah oil sands using a socalled analogue ionic liquid il based on deep eutectic mixtures of choline chloride and urea chclu together with a diluent such as naphtha. Large shovels scoop the oil sand into trucks which then move it to crushers where the large clumps of earth are processed. The solvent extraction process in such solvent extraction, its advantageous to do extraction in successive stages using smaller lots of solvents rather doing extraction once using the entire lot.
Waterbased bitumen extraction technology from mineable oil sands faces major challenges of high water usage and tailings disposal. Seven of the 14 reported mining and plant extraction projects utilize solvent processes for extraction of the oil from the tar sand. Advanced extraction techniques, such as oil sands mining and in situ development, are used to recover heavier oil that does not flow on its own. An aqueousnonaqueous hybrid bitumen extraction hbe process for mined oil sand has the potential to reduce thermal energy demand and greenhouse gas emissions while integrating the productivity and robustness of the current commercial process. Solvent extraction becme s othe commonly used commercial technique to recover oil from oilseeds, presently nhexane is the preferred solvent throughout the world due to its extraction efficiency and ease of availability 5. Because of its high volatility, it was stored in a well fillld air. After the extraction process, solvent is separated by distillation from oil and is then reused. Cenovus has found that the butane used at a well at its christina lake operation makes the bitumen flow faster. The hexane solvent extraction is most commonly used for extracting the coffee oil by soxhlet extractor.
The technologys benefits are even more important in todays low oil price environment, offering a. The technologys benefits are even more important in todays low oil price environment, offering a higher rate of return on investment. The oil patchs solvent solution to extracting bitumen open this photo in gallery. Us8771502b2 closed loop solvent extraction process for. The difference is that the accelerated solvent extraction technique introduces a pressure component which, when combined with heat, enables the extraction process to occur in about onetenth the time and thus shows potential to replace sdse as the industry standard for bitumen extraction from oil sands. Since distillation fractionation separates petroleum products into groups only by their boilingpoint ranges, impurities may remain. As the material dissolves, it is passed to a wash chamber where any remaining oil is removed. Result of essential oil extraction the oil produced was pale yellow, with an odour, pungent and cooling taste. Fresh solvent is being brought continuously into contact with seed from which most of the oil has been extracted, whilst fresh seed is being brought into contact with heavily oil saturated solvent, referred to as miscella. For extraction from oilwet sands, the hot water is replaced by a watersolvent solution usually alkali, or completely by an organic solvent, e. Mainly two types early hybrid process oil sands processed with solvent and water. Where the raw tar sands are extracted with a solvent to form an oil and solvent containing extract and a residue, it is advantageous to combust the residue to form clean sand and hot combustion gases. Conditioning starts the process of separating sand and bitumen and breaks apart any large pieces of oil sands. Environmental sem image of solvent extracted oil sands, showing clays adhere to sand particles.
In a typical surfacemined oil sand processing operation to produce bitumen, the oil sand is usually crushed to reduce the size of oil sand. In most cases, the substance to be extracted, which may be a solid, a liquid or a gas, is dissolved in a liquid, along with other substances, and a. Bitumen recovery from crude bitumen samples from halfaya. Solvent bitumen extraction methods take the steam out of. Process for solvent extraction of bitumen from oil sand energy. The first modernday distillation of essential oil was performed by the persian philosopher avicenna 9801037 a. Solvent extraction although solvent extraction as a method of separation has long been known to the chemists, only in recent years it has achieved recognition among analysts as a powerful separation technique. The oils sands extraction process is composed of an extraction step and a characterization step. Because of its high volatility, it was stored in a well fillld airtight container protected from light in cool place.
Pdf the supercritical solvent extraction of bitumen from oil sand. During extraction, a solvent normally food grade nhexane is used to separate the vegetable. Solvent extraction process for tar sand selective solvent extraction plus filtration of tar sands waterassisted solvent extraction of bitumen from oil sands jan 1969 532. Solvent extraction is a chemical oil extraction method to process oil out from vegetables, oilseeds and nuts by solvent, and hexane is the preferred choice. A system for extracting bitumen from oil sands includes an extractor tank having a reaction chamber. In another aspect of the invention there is provided an improvement for a process comprising the extraction of raw tar sands with a solvent. The obvious solvent to utilise in trinidad would be carbon dioxide as it is readily available from the ammonia plants in trinidad. In this process, oil sand is mixed with light hydrocarbon solvents, and the solvent bitumen solution is separated from the mineral solids by centrifugal.
Unlike conventional ils, these eutectics are relatively cheap and environmentally friendly. Parameters of solvent extraction for bitumen recovery from. Mcgaw et al the extraction of heavy oil from trinidad tar sands using supercritical carbon dioxide. Solvent extraction method for edible oil processing. Extraction of bitumen from oil sands using deep eutectic. Apparatus for solvent extraction of tar sands phillips. This is achieved through a simple waterbased gravity separation process, most of which.
The solvent extraction method recovers almost all continue reading. Solventassisted techniques leave residual solvent underground after bitumen is extracted between 30 per cent and 50 per cent in the case of imperial oils technology tested at cold lake. Us20256092a1 oil from oil sands extraction process. Oil sands companies turn to solvents for lowcost crude. Oil sands extraction and processing natural resources canada. Solvent extraction is a process which involves extracting oil from oilbearing materials by treating it with a low boiler solvent as opposed to extracting the oils by mechanical pressing methods such as expellers, hydraulic presses, etc.
The aboveground extraction process dissolute crushed, 1 minus oil sands materials through contact with a benign nontoxic solvent in an enclosed extractor vessel at temperatures up to 300 f 149 c at nearatmospheric pressures. Many innovative chemical and engineering aspects have been incorporated into the process to achieve over 98% of bitumen extraction from the oil sands, and a greater than 99. The sunnyside deposit, in east central utah, has 1 to 2 billion barrels of. Using solvents in the oilsands blog posts pembina institute. Us8771502b2 closed loop solvent extraction process for oil. Solvent extraction of bitumen from oilsands in a rotating contactor is described. Jul 08, 2014 this invention relates to a solvent based process for the extraction of bitumen from oil sands. Pdf understanding waterbased bitumen extraction from. One extraction method being tested is mixing solvents with steam from steam generators such as these ones at cenovus energys christina lake oil sands operation. The oil sand is mixed with warm water called a slurry and transported by pipeline to an extraction facility. Oil sands are either loose sands or partially consolidated sandstone containing a naturally occurring mixture of sand, clay, and water, soaked with a dense and extremely viscous form of petroleum technically referred to as bitumen. Once the oil sand is crushed, hot water is added so it can be pumped to the extraction plant. A liquid extractant is heated and then pumped, under pressure, into the reaction chamber through a plurality of jet inlets to suspend the oil sand in the.
The oil sands processing facilities will be designed to process 8600 tsh of oil sands ore, yielding about 100,000 barrels per calendar day bpcd of partially deasphalted bitumen product. A solvent extraction process for tar sand citeseerx. It is demonstrated that bitumen can be separated from waterwet alberta oil sands and oil wet utah oil sands using a socalled analogue ionic liquid il based on deep eutectic mixtures of choline chloride and urea chclu together with a diluent such as naphtha. The clays in the oil sands are sticking to sand particles after solvent extraction, which is the desirable outcome of solvent extraction of oil sands because the fine clays wont go into the liquid solventbitumen phase to contaminate the product. Industrial oil processing for the edible oil generally involves the solvent extraction step which may or may not be preceded by pressing. Solvent extraction as the name describes is extraction of oil from seeds, cakes or oil bearing material by using a solvent.
A study on solvent extraction of bitumen from nigerian tar sands using toluene was investigated 5. Solvent extraction method for edible oil solvent extraction is a chemical oil extraction method to process oil out from vegetables, oilseeds and nuts by solvent, and hexane is the preferred choice. In the albian process, a paraffinic solvent is added to the froth to reduce the. The methods of obtaining bitumen from oil sands consist of the hot waterbased extraction hwbe process 1215, the solvent extraction process 16,17, and pyrolysis 1821. Moreover, the 1216% oil yield from scg was achieved in the extraction process, when soxhlet and ultrasound extractions were used. It relies on variations in the solubilities of different compounds in different substances. Closed loop solvent extraction process for oil sands. Fundamentals of nonaqueous extraction of oilsands natural. The methods of obtaining bitumen from oil sands consist of the hot waterbased extraction hwbe process 1215, the solvent extraction. Optimization of cyclohexane extraction of alberta oil sands. The oil patchs solvent solution to extracting bitumen the. While an operation is productive, the subsurface is monitored and the operation is designed to detect any foreseeable solvent loss. Replace conventional hot water production approaches, which use economizers or low grade steam, in either new or existing mining operations.
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