Treatment of composite polyamide membranes to improve performanc

Details Treatment of composite polyamide membranes to improve performanc Treatment of composite polyamide membranes to improve performanc

1997-11-04

1999-03-02

Dudash, Diana

Liquid purification or separation

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Material

210654, 210490, 210506, 427341, 427244, 427245, B01D 6100

Patent

active

058766022

ABSTRACT:
Composite polyamide reverse osmosis membranes are treated with an aqueous chlorinating agent at a concentration of 200 to 10,000 ppm for a time sufficient to improve flux, lower salt passage and increase the stability to base. In a preferred embodiment the membrane is treated with heated water at temperature of 40.degree. C. to 100.degree. C. before being exposed to the chlorine treatment.

REFERENCES:
patent: 4277344 (1981-07-01), Cadotte
patent: 4520044 (1985-05-01), Sundet
patent: 4661254 (1987-04-01), Zupancic et al.
patent: 4761234 (1988-08-01), Uemura et al.
patent: 4913816 (1990-04-01), Waite
patent: 5051178 (1991-09-01), Uemura et al.
patent: 5693227 (1997-12-01), Costa
R. Singh, "Characteristics of a Chlorine-Resistant Reverse Osmosis Membrane", Desalination, 95, pp. 27-37 (1994) No month.
W.G. Light, H.C. Chu, & C.N. Tran, "Reverse Osmosis TFC Magnum Elements for Chlorinated/Dechlorinated Feedwater Processing", Desalination, 64, pp. 411-421 (1987) no month.
L.E. Applegate, C.W. Erkenbrecher, Jr., & H. Winters, "New Chloramine Process to Control Aftergrowth and Biofouling in Permasep B-10 RO Surface Seawater Plants", Desalination, 74, pp. 51-67 (1989) no month.
H.C. Flemming, "Mechanical Aspects of Reverse Osmosis Membrane Biofouling and Prevention", Reverse Osmosis: Membrane Technology, Water Chemistry and Industrial Applications, New York: Rheinhold, pp. 163-209 (1993) no month.
M. Henley, "Membranes: Greater Chlorine Tolerance can Mean Different Performance Characteristics", Ultrapure Water, Mar. 1996, pp. 16, 18, 20.
W.R. Adams, "The Effects of Chlorine Dioxide on Reverse Osmosis Membranes", Desalination, 78, pp. 439-453 (1990) no month.
T. Kawaguchi and H. Tamura, "Chlorine-Resistant Membrane for Reverse Osmosis. I. Correlation Between Chemical Structures and Chlorine Resistance of Polyamide", J. Appl. Polym. Sci, 29, pp. 3359-3367 (1984) no month.
J. Glater and M.R. Zachariah, "A Mechanistic Study of Halogen Interaction With Polyamide Reverse Osmosis Membranes", ACS Symp. Ser., 281, pp. 345-358 (1985) Aug.
J. Glater, S-K. Hong, and M. Elimelech, "The Search for a Chlorine-Resistant Reverse Osmosis Membrane", Desalination, 95, pp. 325-345 (1994) no month.
S. Avlonitis, W.T. Hanbury, & T. Hodgkiess, "Chlorine Degradation of Aromatic Polyamides", Desalination, 85, pp. 321-334 (1992) no month.
R.E. Larson, J.E. Cadotte, & R.J. Petersen, "The FT-30 Seawater Reverse Osmosis Membrane--Element Test Results", Desalination, 38, pp. 473-483 (1981) no month.
S.D. Arthur, "Structure-Property Relationship in a Thin Film Composite Reverse Osmosis Membrane", J. Membrane Science, 46, pp. 243-260 Jun. 1988.
M.V. Biware and N.D. Ghatge, "Studies in Piperazine Containing Poly(Sulphone-amide)s for Chlorine Resistant RO Membranes", J. Poly Science, 2, pp. 927-932 (1994) no month.
J-Y Koo, R.J. Petersen, and J.E. Cadotte, "ESCA Characterization of Chlorine-Damaged Polyamide Reverse Osmosis Membrane", ACS Polym. Prepr., 27 (2), pp. 391-392 (Sep. 1986).
T. Kawaguchi and H. Tamura, "Chlorine-Resistant Membrane for Reverse Osmosis. II. Preparation of Chlorine-Resistant Polyamide Composite Membranes", J. Appl. Polym. Sci, 29, pp. 3369-3379 (1984) no month.
K. Nita, K. Numata, S. Gotoh, and M. Matsui, "Application of a Chlorine-Resistant Polyamide RO Membrane With a Hollow Fiber Configuration", Desalination 96, 33-41 (1994) no month.
J. Glater, M.R. Zachariah, S.B. McCray, and J.W. McCutchan, "Reverse Osmosis Membrane Sensitivity to Ozone and Halogen Disinfectants", Desalination, 48, pp. 1-16 (1983) no month.
Hamida, A.B. et al., "Controlled Biological Fouling in Open Sea . . . ", Disalination and Water Reuse. vol. 6. No. 40 (1996) no month.

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