INTERFACIAL BEHAVIOR OF ASPHALTENES

ASPHALTENES ARE ONE OF MANY NATURALLY OCCURRING MATERIALS WHOSE CHEMICAL MAKEUP IS SO ILL DEFINED THAT CLASSICAL ANALYTICAL METHODS USED TO ELUCIDATE THEIR STRUCTURE, MECHANISM, AND ACTIVITY ARE ONLY PARTLY SUCCESSFUL. FORTUNATELY, HOWEVER, DATA DERIVED FROM MEASUREMENTS OF THEIR INTERFACIAL TENSION AS A FUNCTION OF PH HAVE BEEN EMPLOYED TO EXPLAIN AND TO PREDICT THEIR BEHAVIOR WITH A HIGH DEGREE OF ACCURACY. BASED ON A GENERAL TECHNIQUE DEVELOPED BY THE AUTHOR, A MATHEMATICAL MODEL UTILIZING SIMPLE CHEMICAL REACTIONS AND EQUILIBRIA HAS BEEN CONSTRUCTED THAT WILL GIVE QUANTITATIVELY (1) THE RELATIVE ACTIVITIES OF ALL CHEMICAL SPECIES THAT RESULT FROM REACTIONS OF ASPHALTENES WITH HYDRONIUM AND HYDROXYL IONS; (2) THE APPARENT EQUILIBRIUM CONSTANTS THAT DESCRIBE THESE REACTIONS OCCURRING AT THE OIL-WATER INTERFACE; (3) THE FRACTION OF EACH OF THESE SPECIES PRESENT AS A FUNCTION OF PH; (4) THE EFFECT OF OXYGEN ON THE CHEMICAL NATURE AND BEHAVIOR OF ASPHALTENES; AND, (5) A FOUNDATION FOR A MATHEMATICAL CRITERION FOR EMULSION STABILITY. /AUTHOR/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1970/340/340-003.pdf
• Supplemental Notes:
  • Paper sponsored by Committee on Effects of Natural Elements and Chemicals on Bitumen Aggregate Combinations and presented at the 49th Annual Meeting. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Cratin, Paul D
• Conference:
  • 49th Annual Meeting of the Highway Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1970-1-12 to 1970-1-16
• Publication Date: 1970

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 29-37
• Monograph Title: Asphalt Adhesion and Interfacial Phenomena
• Serial:
  • Highway Research Record
  • Issue Number: 340
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Asphaltene; Behavior; Emulsions; Interfaces; Mathematical models; Oxygen; pH value; Stability (Mechanics); Surface tension
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00211589
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Jun 29 1971 12:00AM