Because there were difficulties to obtain the accurate binary interaction parameters

it was hard to calculate the separation process correctly when sulfolane-aromatic extraction system was simulated.In this paper based on the process data of some aromatic extraction devices

the present equilibrium data of the components in the aromatic extraction system were found in the references firstly

so the binary interaction parameters between any component could be regressed and obtained.Some missing parameters were evaluated by regular solution theory.Secondly

the mathematical model of the primary equipment such as the extraction column and the rectifying column were established using the sequential modular approach to calculate the models.Compared the calculation results with the actual data

the results showed that the average relative error was below 5%

which indicates that the properties method and the mathematical models could calculate the aromatic process correctly and provide the actual production process with theoretical direction and technical support.