| http://www.w3.org/ns/prov#value | - In these Examples, the membrane which is treated is a membrane made from a sulphonated polyaryl ether/sulphone (recurring unit [--C6 H4 --C(CH3)2 --C6 H4 --O--C6 H4 --SO2 --C6 H4 --O--]), prepared in accordance with French Pat. No. 2,138,333, and which, when used in reverse osmosis to treat a 5 g/l aqueous NaCl solution, under 30 bars at 20??? C, possesses a degree of rejection of 95% for a flow r
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