| 摘要 |
Disclosed is a process for removing the Lewis acid catalyst, polymerization solvent and byproducts, such as ketals, from a polyetherketone comprising (A) introducing into an extraction zone a Lewis acid polymerization catalyst, a polymerization solvent and a polyetherketone, (B) passing an alcohol through the extraction zone to remove a majority of the Lewis acid catalyst and the polymerization solvent, (C) passing water through the extraction zone to remove a majority of the alcohol, (D) contacting the polyetherketone with an aqueous acid solution, (E) passing water through the extraction zone to remove a majority of the acid, (F) passing steam through the extraction zone, and (G) subjecting the polyetherketone to a reduced pressure.
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