Main > GASES > Gas Separation Membranes > Org.: USA. NU. (Zeolite: Xylenes) > Work Description
group has shown that "excellent" separation of p-xylene from m-xylene/p-xylene vapor mixtures can be achieved with surface-modified zeolite membranes synthesized on tubular alumina substrates. p-Xylene is used for the synthesis of terephthalic acid, which is used to produce polyester resins and fibers.
"Industrial production of pure p-xylene is costly to a large extent because of the difficulties associated with the separation of xylene isomers," authors note in a yet-to-be-published paper. "Currently, xylene isomers are separated mainly by fractional crystallization and zeolitic adsorption processes, both of which are energy intensive and require batch operations."
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