HETEROGENEOUS SULFONATION PROCESS FOR DIFFICULTY SULFONATABLE POLY(ETHER SULFONE)

摘要

Sulfonation of a poly(ether sulfone) consisting of repeating units of the formula: < IMG > 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.