APPLICATION OF REJECTION ENHANCING AGENTS (REAS) THAT DO NOT HAVE CLOUD POINT LIMITATIONS ON DESALINATION MEMBRANES

Methods of treating used or degraded reverse osmosis membranes post-production are provided. The membranes can be treated online or offline. The reverse osmosis membranes are cleaned and then contacted with a rejection enhancing agent solution that includes polyvinylpyrrolidone or polyvinylalcohol....

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Bibliographic Details
Main Authors KARABELAS, ANASTASIOS, MITROULI, SULTANA, T, ISAIAS, NICOS, P
Format Patent
LanguageEnglish
French
German
Published 14.08.2013
Subjects
CHEMISTRY
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Summary:Methods of treating used or degraded reverse osmosis membranes post-production are provided. The membranes can be treated online or offline. The reverse osmosis membranes are cleaned and then contacted with a rejection enhancing agent solution that includes polyvinylpyrrolidone or polyvinylalcohol. The reverse osmosis membrane is then contacted with a tannic acid solution to produce a reconditioned reverse osmosis membrane having reduced defects. The treatment can take place at temperatures greater than 34° C. because the polyvinylpyrrolidone and polyvinylalcohol rejection enhancing agents used do not have cloud point limitations.
Bibliography:Application Number: EP20110805180