Pervaporation of phenols

Details Pervaporation of phenols Pervaporation of phenols

1988-03-21

1989-02-21

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

2101952, B01D 1300

Patent

active

048062456

ABSTRACT:
Aqueous phenolic solutions are separated by pervaporation to yield a phenol-depleted retentate and a phenol-enriched permeate. The separation effect is enhanced by phase segregation into two immiscible phases, "phenol in water" (approximately 10% phenol), and "water in phenol" (approximately 70% phenol). Membranes capable of enriching phenols by pervaporation include elastomeric polymers and anion exchange membranes, membrane selection and process design being guided by pervaporation performance and chemical stability towards phenolic solutions. Single- and multiple-stage procresses are disclosed, both for the enrichment of phenols and for purification of water from phenolic contamination.

REFERENCES:
patent: 2159434 (1939-05-01), Frey
patent: 3228876 (1966-01-01), Mahon
patent: 4082658 (1978-04-01), Fritzsche et al.

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