The /sup 1/H CRAMPS (combined rotation and multiple-pulse spectrometry) NMR investigation of the organic surface composition and organic mineral interactions of chemically and thermally treated asphalt ridge tar sand: Final topical report

Technical Report · Fri Apr 01 00:00:00 EST 1988

OSTI ID:6726728

Netzel, D A; Coover, P T

An exploratory investigation was conducted using the advanced NMR technique CRAMPS (combined rotation and multiple-pulse spectrometry) to provide information on the types of organic functionality via hydrogen types present on the surface of tar sand residues. The solvents hexane, toluene, and methylene chloride were used to extract the bitumen from the native tar sand. All three solvents removed essentially all of the bitumen from the mineral matrix. However, the solid-state /sup 1/H NMR and diffuse reflectance infrared have shown the presence of a small amount of organic material still in contact with the mineral matrix. Tar sand residues after extraction with methylene chloride contain less organic material than the tar sand residues obtained after solvent extraction with hexane. The hydrogen spectra of the residues show a greater amount of aromatic hydrogens than aliphatic hydrogens. Of interest were the relatively large amounts of hydrogen caused by (1) alkyl hydrogens adjacent to ketone carbonyl functionality, (2) hydrogens of methylene groups bridged between aromatic rings, and/or (3) hydrogens of methyl and ethyl substituents on aromatic rings. The infrared data on the extracted tar sand residue also show a relatively large amount of ketone functionality. The spectra of the residues obtained from the isothermal and nonisothermal pyrolysis of the native tar sand show that a relatively large amount of bitumen still remains with the mineral matrix even at a temperature of 380/degree/C (716/degree/F). Above 400/degree/C (752/degree/F) the /sup 1/H spectra changed dramatically but still do not have the /sup 1/H resolution that was apparent in the spectra of the tar sand residues from solvent extraction. The major change in the /sup 1/H spectra of the tar sand residues after pyrolysis above 400/degree/C was the loss of paraffinic hydrogens. 75 refs., 10 figs., 2 tabs.

• Research Organization: Western Research Inst., Laramie, WY (USA)
• DOE Contract Number: FC21-86MC11076
• OSTI ID: 6726728
• Report Number(s): DOE/MC/11076-2614; ON: DE88010276
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
OIL SANDS
PYROLYSIS
RESIDUES
NMR SPECTRA
ASPHALT RIDGE DEPOSIT
BITUMENS
CHEMICAL SHIFT
HEXANE
HYDROGEN 1
METHYLENE CHLORIDE
MINERALS
NUCLEAR MAGNETIC RESONANCE
PROGRESS REPORT
SOLVENT EXTRACTION
SOLVENT PROPERTIES
SURFACES
TEMPERATURE EFFECTS
TOLUENE
ALKANES
ALKYLATED AROMATICS
AROMATICS
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
DECOMPOSITION
DOCUMENT TYPES
ENERGY SOURCES
EXTRACTION
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
HYDROCARBONS
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
MAGNETIC RESONANCE
MATERIALS
NUCLEI
ODD-EVEN NUCLEI
OIL SAND DEPOSITS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
RESONANCE
SEPARATION PROCESSES
SPECTRA
STABLE ISOTOPES
TAR
THERMOCHEMICAL PROCESSES
040500* - Oil Shales & Tar Sands- Properties & Composition