Liquid-Liquid Equilibrium Research For1-Hexene-N-Hexane-Organic Solvents

1-hexene and other high carbon a-olefins have been important organic petrochemical raw material which can be also used as high quality polymerization monomer in producting high brand polyolefin resin. Consequently, a-olefins like1-hexene havs a wide range of industrial applications and the rapid growth in market demand. F-T synthesis oil can be used as principal methods to product1-hexene. However, a high level of n-alkanes, whose boiling point are close to the olefin’s with the carbon number makes an thorough high energy consumption by distillation. Development of a new separation technology or separating solution for a-olefins/n-alkanes is, therefore, extremely urgent.PM3of quantum chemistry has been used for optimizing the geometrical configuration of1-hexene and n-hexane, the four common extraction agents. Based on quantitative structure parameters, this text has estimated the interoperable relationship between the four solvents and1-hexene or n-hexane, and has preliminarily predicated that the acting force between the four solvents and1-hexene is stronger than n-hexane.It has respectively measured the liquid-liquid equilibrium data, which was carried out under different temperatures, phase ratios, of the four ternary mixture systems composed of extracting solvent,1-hexhene and n-hexane, and has also analyzed and evaluated the separating effect of the four solvents by calculating the selectivity. It has indicated that the selectivity of four solvents to1-hexhene are all above1. The data analysis results show that the quantity of1-hexene in extract phase will increase by the more addition of solvents and by lower temperature. Moreover, quantity of1-hexene and n-hexene in extract phase will also increase when the quantity of them in the raffinate increase and the quantity of1-hexene increase more. It has not been reported in related literatures for the four liquid-liquid equilibrium experiments which has filled the blank of experimental data.By means of adopting the NRTL equation, this article has related the liquid-liquid equilibrium data of different systems, and has got the fitting model parameters. It turns out that the calculated value agreed well with the test value.