Separation of acidic fraction from the Cold Lake bitumen asphaltenes and its relationship to enhanced oil recovery

Neutral and acidic fractions of cold lake bitumen asphaltene were separated on a KOH treated silica column. It was observed that the neutral fraction can be separated by using CHCl 3 as solvent (eluent) while the acidic fraction can be separated by a CHCl 3 + HCOOH mixture. While the distribution of...

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Bibliographic Details
Published in:Fuel processing technology 1996, Vol.46 (1), p.63-69
Main Authors: Khulbe, K.C., Mann, R.S., MacPhee, J.A.
Format: Article
Language:English
Subjects:
Applied sciences
Asphaltenes and its fractions
Cold Lake bitumen's asphaltenes
Crude oil, natural gas and petroleum products
Crude oil, natural gas, oil shales producing equipements and methods
Energy
Enhanced oil recovery methods
Exact sciences and technology
Fuels
IFT
Prospecting and production of crude oil, natural gas, oil shales and tar sands
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Summary:Neutral and acidic fractions of cold lake bitumen asphaltene were separated on a KOH treated silica column. It was observed that the neutral fraction can be separated by using CHCl 3 as solvent (eluent) while the acidic fraction can be separated by a CHCl 3 + HCOOH mixture. While the distribution of VO 2+ ion was approximately the same in the different fractions, the concentration of the radicals may be significantly more in the acidic fraction. The acidic fraction separated has the largest impact on decreasing the interfacial tension (IFT) between asphaltene (in toluene) and 25m M NaOH solution. It was also observed that adsorbed KOH on silica reacted with CHCl 3 when the CHCl 3 + HCOOH mixture was passed through the column.
ISSN:0378-3820
1873-7188
DOI:10.1016/0378-3820(95)00052-6