| http://www.w3.org/ns/prov#value | - In a preferred embodiment of the process according to the invention a membrane is treated with a solution comprising hydroxyalkylcellulose in the presence of an inorganic base as a catalyst, such as NaOH, possible a cross-linking agent, such as a compound with the general formula R3 --(CHOH--CH2 --X)n, where X is a halogen atom, preferably chlorine, R3 is an alkyl group that may include one or mor
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