FRACTIONATION AND CHARACTERIZATION OF LOW MOLECULAR WEIGHT ASPHALTIC HYDROCARBONS

THE FRACTIONS OF LOWER MOLECULAR WEIGHT WERE ISOLATED FROM THREE COMMERCIAL ROAD-BUILDING ASPHALTS. THE FIRST STEP WAS PRECIPITATION OF THE ASPHALTENES WITH N-PENTANE. PENTANE SOLUTIONS OF THE PETROLENES WERE THEN TREATED TWICE WITH 85% SULFURIC ACID, FOLLOWED BY CHROMATOGRAPHY OF THE SULFURIC ACID-INSOLUBLE MATERIAL ON FLORISIL. FINALLY THE PRODUCT ELUTED FROM THE FLORISIL BY N-PENTANE WAS SEPARATED INTO TEN FRACTIONS BY THERMAL DIFFUSION. THE RESULTING 30 THERMAL DIFFUSION FRACTIONS WERE INVESTIGATED BY PHYSICAL CONSTANT- STRUCTURE CORRELATION PROCEDURES AND BY ULTRAVIOLET, INFRARED, AND NUCLEAR MAGNETIC RESONANCE SPECTRAL METHODS. OF THESE PROCEDURES, NUCLEAR MAGNETIC RESONANCE SPECTROMETRY OFFERS THE MOST PROMISING APPROACH TO THE TYPE OF MATERIALS ENCOUNTERED. THE FRACTIONS OBTAINED FROM A SOLVENT-REFINED ASPHALT WERE SOMEWHAT MORE AROMATIC THAN FROM THOSE PRODUCED SOLELY BY DISTILLATION. HYPOTHETICAL MOLECULAR STRUCTURES ARE PRESENTED FOR SOME OF THE LOW MOLECULAR WEIGHT HYDROCARBONS PRESENT IN THE THREE ASPHALTS. /AUTHOR/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00332700
• Supplemental Notes:
  • Vol 38, No 2, PP 225-231, 8 FIG, 8 TAB, 42 REF
• Authors:
  • Wetmore, D E
  • Hancock, C K
  • Traxler, R N
• Publication Date: 1966-2

Media Info

• Serial:
  • Analytical Chemistry
  • Publisher: American Chemical Society
  • ISSN: 0033-2700

Subject/Index Terms

• TRT Terms: Asphalt; Chromatography; Distillation; Hydrocarbons; Infrared spectroscopy; Methane; Molecular structure; Molecular weight; Nuclear magnetic resonance; Sulfuric acid; Thermal diffusion; Ultraviolet spectroscopy
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00210626
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 11 1994 12:00AM