Forward Osmosis, Reverse Osmosis, and Nano/Micro Filtration Membrane Structures
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United States of America Patent
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Issued Date -
Jun 18, 2015
app pub date -
Dec 17, 2013
filing date -
Jun 17, 2011
priority date (Note) -
Abandoned
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Abstract
Disclosed is a composition for forming or treating reverse osmosis (RO), forward osmosis (FO), microfiltration (MF), or nanofiltration (NF) membranes, which includes a stable liquid blend of two of the following polymers: an oxygen polymer, a nitrogen polymer, and a sulfur polymer, where each polymer in a blend have matched solubility parameters; provided, that a nitrogen polymer can be in the form of a powder; where the weight ratio of polymers in each blend can range from 1:99 to 99:1; where each polymer optionally can be halogenated; where any polymer can be dispersed in a solvent for forming the blend.
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