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Water-in-crude oil emulsions from the Norwegian continental shelf

Part II. Chemical destabilization and interfacial tensions

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Abstract

A destabilization study of water-in-crude oil emulsions based on crude oils from the Norwegian Continental Shelf is reported. It is found that medium-chain alcohols (1-butanol and benzyl alcohol) and amines are speeding up the separation of water. The destabilization mechanisms in these two cases seem to be fundamentally different. The alcohols seem to modify the rigidity of the interfacial film by a diffusion/partitioning process while the amines show a strong and specific interaction with interfacial groups, hence hydrophilizing the whole film. Observed trends in the time-dependence of the interfacial tension upon addition of alcohols and amines support these suggestions to destabilization mechanisms. Data for a commercial demulsifier Dissolvan 4455 are also given.

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Author notes

  1. J. Sjöblom

    Present address: Department of Chemistry, University of Bergen, N-5014, Bergen-U, Norway

  2. H. Söderlund

    Present address: Nobel Industries Paper Chemicals AB, Box 115 56, S-100 61, Stockholm, Sweden

  3. I. M. Skjärvö

    Present address: Jotun A/S, Box 400, N-3201, Sandefjord, Norway

Authors and Affiliations

  1. Statoil A/S, Prolab, Stavanger, Norway

    E. J. Johansen & I. M. Skjärvö

  2. Institute for Surface Chemistry, Stockholm, Sweden

    J. Sjöblom, H. Söderlund & S. Lindblad

Authors
  1. J. Sjöblom
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  2. H. Söderlund
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  3. S. Lindblad
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  4. E. J. Johansen
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  5. I. M. Skjärvö
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Sjöblom, J., Söderlund, H., Lindblad, S. et al. Water-in-crude oil emulsions from the Norwegian continental shelf. Colloid & Polymer Sci 268, 389–398 (1990). https://doi.org/10.1007/BF01411682

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  • DOI: https://doi.org/10.1007/BF01411682

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