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US 8,002,874 B2Granted
Liquid-phase and vapor-phase dehydration of organic/water solutions
AssigneeMembrane Technology and Research, Inc.
InventorsYu Huang, Jennifer Ly, Tiem Aldajani, Richard W. Baker
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Abstract
Processes for dehydrating an organic/water solution by pervaporation or vapor separation using fluorinated membranes. The processes are particularly useful for treating mixtures containing light organic components, such as ethanol, isopropanol or acetic acid.
Claims26
A dehydration process, comprising:
- (a) providing a membrane having a feed side and a permeate side wherein said membrane is selectively permeable to water over organic compounds, the membrane having a selective layer comprising a polymer with a repeat unit of a hydrophobic fluorinated cyclic structure of an at least 5-member ring;
- (b) passing a feed solution comprising at least 1 wt % water and a liquid organic compound across the feed side under pervaporation conditions;
- (c) withdrawing from the feed side a dehydrated solution having a water content lower than that of the feed solution;
- (d) withdrawing from the permeate side a permeate vapor having a higher water content than the feed solution.
1 more element
A dehydration process, comprising:
- (a) providing a membrane having a feed side and a permeate side wherein said membrane is selectively permeable to water over organic compounds, the membrane having a selective layer comprising a polymer with a repeat unit of a hydrophobic fluorinated cyclic structure of an at least 5-member ring;
- (b) passing a feed vapor comprising at least 1 wt % water vapor and a vaporized organic compound across the feed side;
- (c) providing a vapor pressure driving force for transmembrane permeation;
- (d) withdrawing from the feed side a dehydrated vapor having a water content lower than that of the feed solution;
- (e) withdrawing from the permeate side a permeate vapor having a higher water content than the feed solution.
2 more elements
Dependencies are inferred from the claim text.