Composite membranes, processes for their preparation and their u

Details Composite membranes, processes for their preparation and their u Composite membranes, processes for their preparation and their u

1989-03-22

1990-11-06

Spear, Frank

Liquid purification or separation

Processes

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

210490, 21050027, 21050029, 21050044, B01D 7154

Patent

active

049684302

ABSTRACT:
Composite membranes of a macroporous filler-containing membrane of at least two incompatible polymers and a pore-free polyurethane membrane applied there to exhibit an improved action in the removal of benzenes optionally suhstituted by lower alkyl radicals, hydroxyl, chlorine or bromine from their mixtures with aliphatic and/or cycloaliphatic hydrocarbons, alcohols, ethers, ketones and/or carboxylic acid esters or from effluent.

REFERENCES:
patent: 4148734 (1979-04-01), Hilterhaus et al.
patent: 4230463 (1980-10-01), Henis et al.

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