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Isolation and characterization of natural surfactants from extra heavy crude oils, asphaltenes and maltenes. Interpretation of their interfacial tension-pH behaviour in terms of ion pair formation

Chemical EngineeringChemical Enhanced Oil RecoveryEnvironmental ChemistryNatural SurfactantsEngineeringSurfactantsPetroleum ChemistryIon Pair FormationOrganic ChemistryAnalytical ChemistryInterfacial Tension-ph BehaviourChemistryDeep Eutectic SolventSurfactant Solution