Nature and distribution of Ni(II) complexes in oil sand asphaltenes
The interactions of asphaltenes with two Ni(II) porphyrins and a non-porphyrin complex in organic medium and with nickel (II) sulfate in aqueous solutions were investigated. The nickel (II) acetylacetonate-asphaltene reaction in chloroform solution occurred rapidly. No saturation Ni(II) content in asphaltenes after this reaction was observed up to a Ni(II) content of 174 ..mu..mole Ni/g. It was shown that discrete Ni(acac)/sub 2/ molecule adsorbs weakly on asphaltenes but that the dominant reaction involved acetylacetonate ligand replacement by asphaltenes functional groups. Nickel (II) mesoporphyrin IX dimethyl ester (Ni-DME) was adsorbed by oil-sand asphaltenes to a greater extent than nickel (II) octaethylphorphyrin (Ni-OEP) possibly due to hydrogen bonding between the ester groups of Ni-DME and asphaltene functional groups. The Ni(II) porphyrin adsorption on asphaltenes in the chloroform solution and not during asphaltene precipitation. The Cu(II) content in asphaltenes after reaction with Cu(acac)/sub 2/ in chloroform under similar reaction conditions used for Ni(acac)/sub 2/ - asphaltene reaction indicated that Cu(II) was taken up by asphaltenes to a smaller extent than Ni(II). The reaction rate of the interaction between asphaltenes and aqueous solutions of nickel (II) sulfate was slow, and dependent on the interfacial contact between the aqueous and organic phases.
- Research Organization:
- Washington State Univ., Pullman (USA)
- OSTI ID:
- 5990159
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
040500* -- Oil Shales & Tar Sands-- Properties & Composition
ADSORPTION
ASPHALTENES
ASPHALTS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BITUMENS
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CARBOXYLIC ACIDS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHROMATOGRAPHY
COMPLEXES
COPPER COMPLEXES
DISTRIBUTION
ENERGY SOURCES
EVEN-ODD NUCLEI
FOSSIL FUELS
FUELS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
INTERMEDIATE MASS NUCLEI
ISOTOPES
KINETICS
MATERIALS
MOLECULAR WEIGHT
NICKEL 63
NICKEL COMPLEXES
NICKEL COMPOUNDS
NICKEL ISOTOPES
NICKEL SULFATES
NUCLEI
OIL SANDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PORPHYRINS
RADIOISOTOPES
REACTION KINETICS
SEPARATION PROCESSES
SORPTION
SORPTIVE PROPERTIES
STRUCTURAL CHEMICAL ANALYSIS
SULFATES
SULFUR COMPOUNDS
SURFACE PROPERTIES
TAR
TIME DEPENDENCE
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS
YEARS LIVING RADIOISOTOPES