Novel water softening process using membranes

Details Novel water softening process using membranes Novel water softening process using membranes

1988-06-13

1989-04-25

Wyse, Tom

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

C02F 144

Patent

active

048245747

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.

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