Advertisement

Propylene oxide-ethylene oxide block copolymers as demulsifiers for water-in-oil emulsions, I. Effect of molecular weight and hydrophilic-lipophylic balance on the demulsification efficiency

  • N. N. Zaki
  • M. E. Abdel-Raouf
  • A. -A. A. Abdel-Azim
Anorganische Und Physikalische Chemie

Summary

A series of propylene oxide (PO)-ethylene oxide (EO) block copolymers with differentEO/PO ratios and molecular weights have been prepared and tested for their demulsification potency in breaking synthetic water-in-benzene emulsions stabilized by asphaltenes. Their partition coefficients between benzene and water were determined by means of UV absorption. NMR spectroscopic analysis was used for determining the actualPO/EO ratios of these block copolymers. The effects of hydrophilic-lipophilic balance (HLB) and molecular weight of the prepared surfactants on their demulsification efficiency were investigated. It was found that the demulsification efficiency is directly proportional to both HLB and molecular weight.

Keywords

Block copolymer Demulsifiers Water-in-Oil emulsion Ethylene oxide Propylene oxide 

Propylenoxid-Ethylenoxid-Blockcopolymere als Emulsionsbrecher für Wasser-in-Öl-Emulsionen, 1. Mitt. Effekt des Molekulargewichts und des Hydrophilie-Lipophilie-Gleichgewichts auf die Effizienz der Emulsionsbrechung

Zusammenfassung

Eine Reihe von Propylenoxid (PO)-Ethylenoxid (EO) Blockcopolymeren mit verschiedenenEO/PO-Verhältnissen und Molekulargewichten wurden hergestellt und auf ihre Effizienz bezüglich des Brechens von durch Asphalt stabilisierten synthetischen Wasser/Benzol-Emulsionen untersucht. Ihre Verteilungskoeffizienten zwischen Benzol und Wasser wurden mittels UV-Spektroskopie ermittelt. DasPO/EO-Verhältnis wurde NMR-spektroskopisch bestimmt. Die Effekte von Hydrophilie-Lipophilie-Gleichgewicht (HLB) und Molekulargewicht auf die Effizienz der Wirkung wurden untersucht. Das Emulsionsbrechungsvermögen ist direkt proportional zu HLB und indirekt proportional zum Molekulargewicht.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    Graham DE (1988) Spec Pub R Soc of Chem67: 55Google Scholar
  2. [2]
    Thompson DG, Taylor AS, Graham DE (1985) Colloids Surf15: 175Google Scholar
  3. [3]
    Ivanov IB, Jain RK, Somasundaran P, Traykov TT (1974) J Colloid Interface Sci51: 1819Google Scholar
  4. [4]
    Bridie AL, Wanders TH, Zegveld W, Vander Heijde HB (1980) Marine Pollut Bull11(12): 343Google Scholar
  5. [5]
    Marsden SS, Ishimoto K, Chen L (1988) Colloids Surf29: 133Google Scholar
  6. [6]
    Sjoeblom J, Mingyuan L, Chirsty AA, Tiren G (1992) Colloids Surf66: 55Google Scholar
  7. [7]
    Sjoeblom J, Urdahl O, Hoeiland H, Christy AA, Johansen EJ (1990) Prog Colloid Polym Sci82: 131Google Scholar
  8. [8]
    McMahon AJ (1992) NATO AST, ser, ser c (Emulsion: Fundam Pract Approach)363: 135Google Scholar
  9. [9]
    Bhardwaj A, Hartland S (1994) Ind Eng Chem Res33(5): 1271Google Scholar
  10. [10]
    Schramm LL (1992) Emulsions Fundamentals and Applications in the Petroleum Industry. ACS, Washington, DC, p 313Google Scholar
  11. [11]
    Madea JR, Fruth SM, Miller CA, Burbower AB (1976) Env Sci Technol10: 1044Google Scholar
  12. [12]
    Staiss F, Boehm R, Rainer K (1991) SPE Prod Eng6(3): 334Google Scholar
  13. [13]
    Hockenberry HR, Lisser JE (1977) J Soc Lub Eng33: 247Google Scholar
  14. [14]
    Adal M, Flodin P, Gottberg E, Holmberg K (1994) Tenside Surf Det31(1): 9Google Scholar
  15. [15]
    Schmitt TM (1992) Analysis of Surfactants. Marcel Dekker, New York, p 310Google Scholar
  16. [16]
    Naylar CG (1986) J Am Oil Chem Soc63: 1201Google Scholar
  17. [17]
    Liem AJS, Woods DR (1974) Rev of Coalescence Phenomena, AlChE Symp Ser70: 8Google Scholar
  18. [18]
    Little R (1974) Fuel53(4): 246Google Scholar
  19. [19]
    Vander Waarden M (1958) Kolloid Z156: 116Google Scholar
  20. [20]
    Dodds JA (1980) J Colloid Interface Sci77: 317Google Scholar
  21. [21]
    Lissant KJ (1980) Emulsion and Emulsion Technology. Marcel Dekker, New York, p 122Google Scholar
  22. [22]
    Griffin WC (1949) J Soc Cosmet Chem1: 311Google Scholar
  23. [23]
    Becher P (1985) Encycl Emulsion Technol2: 425Google Scholar
  24. [24]
    Eley DD, Hey MJ, Symonds JD (1988) Colloids Surf32: 87Google Scholar
  25. [25]
    Laurence ASC, Killner KW (1948) J Inst Petrol34: 28Google Scholar
  26. [27]
    Cooper DG, Zajic JE, Cannel EJ, Wood JW (1980) Cand J Chem Eng58: 576Google Scholar
  27. [28]
    Berger PD, Hsu C, Arendell JP (1988) SPE Production Engineering, November, 522Google Scholar
  28. [29]
    Abdel-Azim AA, Huglin MB (1982) Eur Polym J18: 735Google Scholar
  29. [30]
    Abdel-Azim AA, Huglin MB (1983) Polymer24: 1308Google Scholar
  30. [31]
    Abdel-Azim AA (1993) Polym Bull30: 579Google Scholar
  31. [32]
    Abdel-Azim AA (1994) Macromol Chem Phys195: 159Google Scholar
  32. [33]
    Abdel-Azim AA (1993) Macromol Chem Rapid Commun14: 339Google Scholar
  33. [34]
    Abdel-Azim AA, Tenhu H, Merta J, Sundholm F (1993) Polym J25(7): 671Google Scholar
  34. [35]
    Marian M, Petri S (1989) Academia Medyczna Pol138: 484Google Scholar

Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • N. N. Zaki
    • 1
  • M. E. Abdel-Raouf
    • 1
  • A. -A. A. Abdel-Azim
    • 1
  1. 1.Egyptian Petroleum Research InstituteNasr City, CairoEgypt

Personalised recommendations