The best mode equations to calculate some physical properties of hydrocarbons in the areas near and above the critical

Separation issue Fyshrtrvpsh catalytic process of the liquid products) Wax (, Now as one of the main challenges posed Vaknshgrhay slurry bubble. It really isolated because of the high viscosity of the reactive output of wax, and other undesirable properties with low rates and numerous problems is associated. Among the various ethods of separation, supercritical extraction process is one of the best techniques proposed in recent years to do this is segregation. Application of these practices mainly due to distinctive features of supercritical fluid and the fluids ability to improve physical properties such as viscosity wax is density. On the other hand, should know and do modeling process requires access to information for the physical properties of supercritical fluid is in operational condition, although the calculations and physical properties in these critical situations and challenges critical error always great has been associated with. In this research, the review comments and suggested some type of relationship the best mode equations for predicting viscosity, density and thermal conductivity of light and heavy hydrocarbons and their ixtures, using the same equations of state properties for the hexane and Some mixtures of ydrocarbons in the critical area around and above the calculated and the results are compared with experimental values. then the amounts proposed density, viscosity and conductivity for the mixture of wax and hexane in the operational range around the critical point of hexane is presented. Results indicate that adding hexane to wax the operating range) when supercritical hexane phase is done (than adding it in gas or liquid states, more effective in improving the physical properties of wax and thus efficiency, separation of catalyst / wax will.