DEMULSIFICATION EFFECT OF NON-IONIC SURFACTANTS TWEEN-20, TWEEN-80 ON MODEL WATER-IN-OIL EMULSIONS

Breaking of water-in-oil emulsions is a necessary part of crude oil preparation for processingandthe development of new demulsifying compositions has importance for the Republic of Kazakhstan.In this research, the demulsificationeffectof non-ionic surfactants Tween-20, Tween-80 with a high value of hydrophilic-lipophilic balance (HLB)was considered. For thermal treatment of water-in-oil emulsion the model emulsions based on crude oil of North-West Konys with 30%, 40%, 50%, 60 % (vol.) of water phase concentrationwerestudied The degree of oil emulsion dewatering in the presence of Tween-20 do not exceed 63% at temperature 60 degrees C. The optimal term of thermal chemical breaking down by means of mixtures of non-ionic surfactants Tween-20, Tween-80 and anionic surfactant sulfanol at a ratio of 1:1 (vol.) was determined. The maximum demulsification equaled to 97.01% after 100 min for 30-50% water-in-oilemulsionwas found out for Tween-20 - sulfanol mixture at a ratio of 1:1 at 60 degrees C. The results confirm the opportunity of using of mixtures of Tweens with anionic surfactant sulfanol as demulsifying reagents.