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Solvent bitumen extraction processes are alternatives to thermal processes with potential for improved economic and environmental performance. However, solvent interaction with bitumen commonly results in in situ asphaltene precipitation and deposition, which can hinder flow and reduce the process efficiency. Successful implementation requires one to select a solvent that improves recovery ...
The role of individual saturates, aromatics, resins, and asphaltenes (SARA) fractions of bitumen on solvent-steam process performance was examined both at liquid and vapor water conditions. The behavior of asphaltenes was investigated through systematic microscopic analyses with the absence and presence of reservoir rock.
Asphaltenes in bitumen and crude oil are generally defined as the fraction which is insoluble in n-heptane. There is also a perceived definition which describes asphaltenes as a very polar, high ...
papers, and asphaltenes every few hours. If the weight change is less than 0.0001g over a 12 hour period, the asphaltenes are dry. Determine the amount of asphaltene in the oil 20) The weight of the asphaltenes can be determined by subtracting the weight of …
Mukhametshina, Albina, Kar, Taniya, and Berna Hascakir. "Asphaltene Precipitation During Bitumen Extraction With Expanding-Solvent Steam-Assisted Gravity Drainage: Effects on Pore-Scale Displacement."
Supercritical fluid extraction (SFE) of bitumen was carried out in a continuous extractor using propane as the solvent at several temperatures and pressures. The asphaltene contents of the residual fractions in the extractor were compared to the asphaltene content of the original bitumen. Asphaltenes were defined as pentane insolubles in this ...
Bitumen is a complex mixture, containing a high proportion of poorly soluble asphaltenes. Unpredictable precipitation of this component can cause process problems during bitumen extraction. Consequently, the selection of an appropriate solvent is an important factor in the optimization of bitumen separation by solvent extraction.
Request PDF | Asphaltene Deposition during Bitumen Extraction with Natural Gas Condensate and Naphtha | Solvent bitumen extraction processes are alternatives to thermal processes with potential ...
US20120241390A1 US13/434,288 US201213434288A US2012241390A1 US 20120241390 A1 US20120241390 A1 US 20120241390A1 US 201213434288 A US201213434288 A US 201213434288A US 2012241390 A1 US2012241390 A1 US 2012241390A1 Authority US United States Prior art keywords shear reduced component bitumen oil Prior art date Legal status (The legal status is an …
Bitumen extraction and asphaltene removal from heavy crude using high shear Download PDF Info Publication number US20110266198A1. US20110266198A1 US12/914,781 US91478110A US2011266198A1 US 20110266198 A1 US20110266198 A1 US 20110266198A1 US 91478110 A US91478110 A US 91478110A US 2011266198 A1 US2011266198 A1 US 2011266198A1
It was concluded that solute polarity played a significant role in the extraction yields of the four bitumens. The Whiterocks bitumen, which was the least polar bitumen based on asphaltenes content, gave higher extraction yields compared to the bitumens from the other three deposits at all five operating conditions.
For bitumen extraction, solvents should have a combination of paraffinic and aromatic components to extract all components of bitumen, including the asphaltenes which are generally insoluble in ...
Bitumen is a complex mixture, containing a high proportion of poorly soluble asphaltenes. Unpredictable preci-pitation of this component can cause process problems during bitumen extraction. Consequently, the selection of ... potential solvent for bitumen extraction based on high bitumen recovery, low fine solids in the produced bitu-men, and ...
Asphaltene Precipitation During Bitumen Extraction With Expanding-Solvent Steam-Assisted Gravity Drainage: Effects on Pore-Scale Displacement Albina Mukhametshina; Albina Mukhametshina ... The results of this work show that not only asphaltenes but also the other fractions of oil, along with the reservoir-clay type and the clay amount, affect ...
Bitumen extraction from tar sand by liquid carbon dioxide method was investigated. • Greatest recovery of 29.6% was obtained at 50 MPa with the addition of salty water.. Upgraded bitumen was clean of asphaltenes and petcokes.
The chemical perspective describes bitumen as a composite material that can easily be separated into two major fractions by solvent extraction with n-heptane: (a) the insoluble fraction or asphaltenes, and (b) the soluble fraction, the maltenes .
Changes in the amount of residual bitumen and asphaltenes after solvent extraction at different ratio of toluene and petroleu m ether (P.E.) for the Ashalchinskoy e bitumen Fig. 6.
