Composite membranes, processes for their preparation and their use
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United States of America Patent
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Nov 6, 1990
Grant Date -
N/A
app pub date -
Mar 22, 1989
filing date -
Apr 7, 1988
priority date (Note) -
Expired
status (Latency Note)
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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.
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