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DOI: 10.5593/SGEM2016/HB14/S01.013

DEMULSIFICATION OF NATURAL WATER-IN-OIL EMULSIONS WITH COMPOSITIONAL MIXTURES BASED ON SURFACTANTS

Adilbekova A.O., Omarova K.I.
Friday 11 November 2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, SGEM Vienna GREEN Extended Scientific Sessions, www.sgemviennagreen.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-80-3 / ISSN 1314-2704, 2 - 5 November, 2016, Book 1 Vol. 4, 95-102pp, DOI: 10.5593/SGEM2016/HB14/S01.013

ABSTRACT

The paper considers the stability of crude oil emulsions in the presence of aqueous solutions of polymers and surfactants and their mixtures. Surfactants of different nature (anionics, cationics and nonionics - sodium dodecylbenzenesulfonates (sulphanol), cetyltrimethylammonium bromide (CTAB), ethoxylated isooctylphenol (OP-10), respectively) and watersoluble industrial polymers such as polyethylenglicol (PEG), carboxymethylcellulose (NaCMC) were used for preparation of demulsifying compositions. The behavior of the compositional mixtures at the different interfaces was studied. The compositions studied have a high surface activity (surface tension decreases till 3 mJ/m2 at the water/oil interface). The demulsifying action of the compositional mixtures was researched. The most effective dewatering compositions were obtained on the base of CTAB and NaCMC at ratio of 1:1. The amount of separated water was equal to 91,95 % after 105 min at 60°С. In addition, the combined action of thermochemical processing and centrifuging showed the increase of dewatering degree of water-in-oil emulsions under action of CTAB/NaCMC mixture (V=97,95 %).

Keywords: water-in-oil emulsion, surfactant, polymer, compositonal mixtures, interfacial tension, thermochemical dewatering.

PAPER DOI: 10.5593/SGEM2016/HB14/S01.013, DEMULSIFICATION OF NATURAL WATER-IN-OIL EMULSIONS WITH COMPOSITIONAL MIXTURES BASED ON SURFACTANTS

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