Process for preparing polyaryletherketones

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A polyarylene ether ketone is prepared by adding an aromatic dihalogen compound and a bisphenol to a reactor and conducting a polycondensation reaction in the presence of one or more of an alkali metal carbonate and an alkaline earth metal carbonate in a high-boiling solvent; and again adding, during the course of the polycondensation, at least one of a bisphenol and an aromatic dihalogen compound in an amount to achieve a target molar mass of the polyarylene ether ketone.