PYROLYTIC REACTIONS OF ASPHALTIC MATERIALS

THE PYROLYTIC REACTIONS FOR PETROLEUM ASPHALTS, AIR-BLOWN ASPHALTS, AND FRACTIONS SEPARATED FROM ASPHALT WERE INVESTIGATED TO OBTAIN KNOWLEDGE CONCERNING DIFFERENCES IN THEIR REACTIVITY AND COMPOSITION. TWO MODES OF PYROLYSIS WERE UTILIZED. ONE INVOLVED A PLATINUM FILAMENT HEATED TO ABOUT 200 DEGREES C AFTER THE SAMPLE WAS DEPOSITED ON IT. THE OTHER CONSISTED OF A CLOSED TUBE REACTOR, HEATED EXTERNALLY. THE PYROLYSIS PRODUCTS WERE SEPARATED IN A GAS CHROMATOGRAPH PROGRAMMED FOR OPERATION AT 75 DEGREES TO 200 DEGREES C. QUALITATIVE DIFFERENCES IN THE QUANTITY OF PYROLYSIS PRODUCTS AND THE RELATIVE AMOUNTS OF THE CHEMICAL COMPOUNDS PRODUCED WERE OBSERVED. SOME OF THE CHEMICAL SPECIES IN THE PYROGRAMS OBTAINED HAVE BEEN IDENTIFIED BY THEIR RETENTION TIMES. THESE INCLUDE THE PARAFFINS AND OLEFINS HAVING FROM SEVEN TO 14 CARBON ATOMS. STRUCTURALLY DIFFERENT ASPHALT FRACTIONS YIELDED UPON PYROLYSIS DIFFERENT QUANTITIES OF UNPYROLYZED RESIDUE, WHILE THEIR CORRESPONDING PYROGRAMS HAD SIMILAR GENERAL APPEARANCES. /AUTHOR/

  • Supplemental Notes:
    • Vol 4, No 3, PP 215-220
  • Authors:
    • Schweyer, H E
  • Publication Date: 1965-9

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  • Accession Number: 00210620
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 15 1994 12:00AM