Complexation Sorbents for Olefin-Paraffin Separations

tt - Complex ation Sorbents for Olefin-Paraffin Separations 

Olefin-paraffin separations represent a class of most important and also most costly separations in the petrochemical industry. Cryogenic distillation has been used for more than 60 years for these separations (Keller et al, 1992). They remain to be the most energy-intensive distillations because of 

The equilibrium isotherms of C3H6 over C3H8 at 70°C on AgN03/Si02 prepared by incipient wetness are shown in Fig. 11. 

From these results, it is seen that the sorbents have excellent selectivities and olefin capacities. The isotherms are also relatively linear. The linearity is desirable for cyclic processes such as PSA (Rege, Padin, and Yang, 1998). Diffusion rates and isotherm reversibilities have also been measured on these systems, and they were all highly suitable for PSA. 

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