Use of membranes to separate organic liquids having different polarities
OwnerJ. Scott Buchanan, Lawrence J. Altman +1inventors
InventorsJ. Scott Buchanan, Lawrence J. Altman, John W. Diehl
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Abstract
A method for separating at least one lower polarity fluid from a mixture of fluids having varying polarity, comprising contacting at least one low polarity or non-polar polymeric membrane with the mixture of fluids under conditions such that the at least one lower polarity fluid selectively permeates through the membrane, wherein the membrane is one which has a ratio of heteroatoms chemically bonded to the carbon atoms in the membrane to the number of carbon atoms of less than about 0.2, preferably less than about 0.05.
Claims18
A method for separating at least one lower polarity fluid from a mixture of fluids having varying polarity, comprising:
- contacting at least one low polarity or non-polar polymeric membrane with said mixture comprising fluids of varying polarity under conditions such that said at least one lower polarity fluid selectively permeates through said membrane.
A process for producing a dialkyl carbonate which comprises the following steps:
- (a) reacting an alkanol with an alkylene carbonate, thereby forming a product mixture comprising said dialkyl carbonate, said alkanol and said alkylene carbonate;
- and
- (b) separating at least a portion of said dialkyl carbonate from said product mixture by contacting at least one low polarity or non-polar polymeric membrane with said product mixture under conditions which produce a permeate comprising said dialkyl carbonate in a concentration higher than in said product mixture from step (a).
Dependencies are inferred from the claim text.