FLOCULATION AND SEDIMENTATION OF OIL DISPERSIVE SYSTEMS OVER THE ADITIVES CONTAINING PHOSPHATE AND AMINE
Abstract
There is a trend in the world for production growth of hardly recoverable heavy oils and bitumen with high content of resin-asphaltene substances that precipitate when aggregated, causing stability loss of oil dispersies. The goal of this work is to establish regularities for the effect of oil soluble surfactant additives containing the polar functional groups of different chemical nature on the processes of flocculation and sedimentation of model oil dispersions. Methods emplоyed are infrared spectroscopy, turbidimetric titration and dispersion analysis. It has been found that the domestically produced surfactant additive containing both amino and phosphate groups in the chain causes synergistic effect, due to simultaneous action of these functional groups, that slows down flocculation processes (efficiency is 108%) and sedimentation of model oil dispersions, which is confirmed by 13 times reduction of rates and sedimentation constants and 1.6–3.2 times decrease of associate size for resin-asphaltene substances. This results in the increase of aggregative and kinetic stability of the colloidal system. It has been shown that the additive is an effective flocculation inhibitor and dispersing agent for oil dispersion systems, that can be recommended for practical application as a substitute for expensive imported analogues.
About the Authors
O. N. Opanasenko
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Ph. D. (Chemistry), Associate Professor, Head of laboratory of oil and organomineral dispersions
Belarus
Ph. D. (Chemistry), Associate Professor, Head of laboratory of oil and organomineral dispersions
N. V. Yakavets
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Ph. D. (Chemistry), Senior Researcher in the laboratory of oil and organomineral dispersions
Belarus
Ph. D. (Chemistry), Senior Researcher in the laboratory of oil and organomineral dispersions
N. P. Krut’ko
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
academician, D. Sc. (Chemistry), Head of D epartment of composition materials
Belarus
academician, D. Sc. (Chemistry), Head of D epartment of composition materials
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