Patent ID: 9133111
Filing Date: 2015-09-15
Classification: C01D,C07C,C08G

Abstract:
1. A method for the preparation of a poly(aryletherketone) by aromatic nucleophilic substitution, wherein said aromatic nucleophilic substitution comprises reacting a substantially equimolar mixture of at least one bisphenol and at least one dihalobenzoid compound or at least one halophenol compound in a solvent comprising a diphenyl sulfone wherein said diphenyl sulfone has been used in the preparation of a poly(aryletherketone) (used DPS), and wherein said used DPS meets all of the following impurity limitations: wherein ppm and wt. % are based on the total weight of the used DPS and area % represents the ratio of the GC peak area of the impurity of concern over the total area of all GC peaks of the used DPS.