ie302942r_si_001.pdf (94.94 kB)
Benzene Hydroxylation and Simultaneous Extraction of Phenol in Two Membrane Contactors Made with Three-Compartment Cells
journal contribution
posted on 2016-02-19, 01:48 authored by Raffaele Molinari, Pietro Argurio, Teresa PoerioTwo different three-compartment membrane contactors [called
solid
membrane contactor (SMC) and liquid membrane contactor (LMC)] were
tested in the synthesis and separation of phenol produced by direct
hydroxylation of benzene using a Fenton reaction. Phenol produced
in the aqueous reacting phase was extracted in the organic phase and
simultaneously stripped in the basic aqueous phase. Preliminary tests
on phenol recovery evidenced better performances (86.5% of phenol
recovered in the strip phase) using the SMC with 0.1 M Na2SO4 in the aqueous feed phase at 35 °C. In the tests
of partial oxidation, higher phenol productivity (0.62 gph gcat–1 h–1) was obtained
in this last system because the high phenol flux away from the reacting
phase permitted one to extract a high amount of phenol in the organic
and aqueous (strip) phases. This extraction protected phenol by its
subsequent oxidation. It was evidenced that the use of a third compartment
containing an alkaline aqueous stripping phase permitted one to recover
phenol at 100% purity.