COMPOSITIONAL STUDIES OF AN ASPHALT AND ITS MOLECULAR DISTILLATION FRACTIONS BY NUCLEAR MAGNETIC RESONANCE AND INFRARED SPECTROMETRY

MOLECULAR DISTILLATION OF A WILMINGTON (CALIFORNIA) ASPHALT THAT WAS PREPARED IN THE LABORATORY GAVE FRACTIONS WHOSE SULFUR, OXYGEN, NITROGEN, AND AROMATIC CONTENTS INCREASED WITH MOLECULAR WEIGHT. PARAFFINIC CONTENT WAS NEARLY CONSTANT WITH MOLECULAR WEIGHT. THE INCREASE IN AROMATIC CONTENT WITH MOLECULAR WEIGHT WAS OFFSET BY A DECREASE IN THE NAPHTHENIC CONTENT. ALTHOUGH THE TOTAL OXYGEN CONTENT INCREASED WITH MOLECULAR WEIGHT THE ACID OXYGEN DECREASED. A CORRELATION BETWEEN THE NAPHTHENIC CONTENT AND THE ACID OXYGEN WAS SHOWN. METHYLENE CHLORIDE, AS A SOLVENT, PERMITTED THE RESOLUTION OF THE 1700/CM CARBONYL BAND OF THE ASPHALT AND ITS FRACTIONS INTO THREE DISCRETE BANDS AT 1740, 1700, AND 1655/CM. CARBOXYLIC ACIDS APPEAR RESPONSIBLE FOR THE 1740/CM BAND IN THE ASPHALT AND ITS DISTILLATION FRACTIONS. THESE ACIDS WERE FOUND TO BE ASSOCIATED IN THE ASPHALT. A MODEL NAPHTHENIC ACID, CYCLOHEXANECARBOXYLIC ACID, WAS ASSOCIATED WITH FUNCTIONAL GROUPS IN THE ASPHALT. /AUTHOR/

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  • Supplemental Notes:
    • Vol 40, No 7, PP 1100-1103
  • Authors:
    • Helm, R V
    • Petersen, J C
  • Publication Date: 1968-6

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  • Accession Number: 00210831
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 8 1994 12:00AM