Title:
APPLICATION OF REJECTION ENHANCING AGENTS (REAS) THAT DO NOT HAVE CLOUD POINT LIMITATIONS ON DESALINATION MEMBRANES
Document Type and Number:
WIPO Patent Application WO/2012/046141
Kind Code:
A4
Abstract:
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.
Inventors:
KARABELAS ANASTASIOS (GR)
MITROULI SULTANA T (GR)
ISAIAS NICOS P (CY)
MITROULI SULTANA T (GR)
ISAIAS NICOS P (CY)
Application Number:
PCT/IB2011/002782
Publication Date:
October 18, 2012
Filing Date:
October 04, 2011
Export Citation:
Assignee:
SAUDI ARABIAN OIL CO (SA)
ARAMCO SERVICES CO (US)
KARABELAS ANASTASIOS (GR)
MITROULI SULTANA T (GR)
ISAIAS NICOS P (CY)
ARAMCO SERVICES CO (US)
KARABELAS ANASTASIOS (GR)
MITROULI SULTANA T (GR)
ISAIAS NICOS P (CY)
International Classes:
B01D65/08; B01D61/02; B01D67/00; C02F1/44
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