Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Including surface treatment of porous body
Patent
1988-06-13
1989-03-14
Sever, Frank
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Including surface treatment of porous body
21050038, 264DIG48, B01D 1300
Patent
active
048122700
ABSTRACT:
A novel water softening membrane and process for making the same is described. The membrane can be prepared by treating a polyamide reverse osmosis membrane with a strong mineral acid followed by treatment with a rejection enhancing agent. The resulting membrane at transmembrane pressures of 50 psi can attain a magnesium sulfate rejection with a 0.2 percent aqueous solution of more than 90 percent with a water flux of more than 15 gallons per square foot per day.
REFERENCES:
patent: 3551331 (1970-12-01), Cescon et al.
patent: 3853755 (1974-12-01), Ganci
patent: 3877978 (1975-04-01), Kremen et al.
patent: 3886066 (1975-05-01), Chen et al.
patent: 4259183 (1981-03-01), Cadotte
patent: 4277344 (1981-07-01), Cadotte
patent: 4520044 (1985-05-01), Sundet
patent: 4567009 (1986-01-01), Badenhop et al.
patent: 4618533 (1986-10-01), Steuck
patent: 4769148 (1988-09-01), Fibiger et al.
"Second World Congress on Desalination and Water Re-Use"; vol. 3, Nov. 17-22, 1985; Bermuda.
Report No. PB-81-170607--"Development of Improved Cleaning and Surface Regeneration Methods and Economic Analysis of These Methods for Sea Water Membranes," Burns and Roe, Inc., Paramus, N.J., Prepared for Office of Water Research and Technology, Washington D.C.,--31 Jan. 81--U.S. Department of Commerce, National Technical Information Service.
Cadotte John E.
Walker David R.
Filmtec Corporation
Sever Frank
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