Heterogeneous sulfonation process for difficulty...

Details Heterogeneous sulfonation process for difficulty... Heterogeneous sulfonation process for difficulty...

C - Chemistry, Metallurgy

08

G

402/320

C08G 75/23 (2006.01) C08G 65/48 (2006.01)

Patent

CA 1221491

ABSTRACT Sulfonation of a poly(ether sulfone) consisting of repeating units of the formula: Image The process comprises providing the poly(ether sulfone) in the form of a polymer/solvent intercrystalline solid, suspended in a fluid, chlorinated hydrocarbon. The next step includes sulfonating the solid form in the suspension. The sulfonated poly(ether sulfones) and derivatives thereof are useful as membrane forming materials for a variety of separation processes, e.g., reverse osmisis, ultra-filtration, ion exchange and like processes.

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