Selection of effective demulsifier for West Absheron oils and modeling of demulsification process

Deemulsification and desalination of West Absheron oils were studied using demulsifiers based on nonionic surfactants. It was determined that the effectiveness of the demulsification process depends on the type of applied nonionic surfactant and solvent. It was found that the temperature has a more effective impact on the demulsification process than the consumption of the demulsifier. The properties of the obtained demulsifier were compared with Dissolvan-4397 and it was determined that the effectiveness of the proposed demulsifier for West Absheron oils was higher. The scientific originality of the proposed study is the creation of an empirical mathematical model of the process and the fact that the produced demulsifier has a higher activity for West Absheron oils. Based on the principle of empirical modeling, a mathematical model of the demulsification process was built. A comparative analysis of model calculations proves that it is adequate and describes the process with high accuracy. The kind of nonionic surfactant and solvent used in the demulsifier᾽s formulation determines its effect. It was shown that temperature has a more effective effect on the demulsification process than demulsifier consumption. The consumption of the deemulsifier at 30 °C must be increased six times, from 50 g/t to 300 g/t, in order to achieve the impact that is achieved when the temperature is raised from 30 °C to 70 °C, or 40 °C. It was emphasized that non-linear and power functions have a wide perspective in the modeling of oil preparation and refining. Keywords: emulsion; demulsifier; demulsification; residual water; chloride salts; non-linear functions.