Abstract
The effect of surfactants - depressants (paraflow, santopur, polyalkylmethacrylate, oxidized petrolatum) on the temperaturesof dissolution, crystallization and solidification of solutions of petroleum and synthetic paraffins in hydrocarbon solvents of various compositions and viscosity was studied. It has been shown that the activity of the depressant should be evaluated by the content of paraffins, the development of the dispersed structure of which it prevents in a given solvent. The phenomenon of hysteresisof the temperatures of the onset of crystallization and dissolution of paraffin in solvents with the addition of a depressant has been established. Paraflow is not a micelle-forming surfactant, but forms molecular complexes with n-paraffin.
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