PURPOSE: A process for producing polyketone is provided to prepare polyketone with excellent catalyst activity and inherent viscosity by adding ammonium persulfate in polymerization.;CONSTITUTION: A process for producing polyketone comprises a step of copolymerizing carbon monoxide and ethylenic unsaturated compound in a liquid medium in the presence of organometallic complex catalysts. The organometallic complex catalyst comprises (a) Group 9, 10 or 11 transition metal compounds, (b) a ligand with Group 15 elements and (c) negative ions of acid with 4 or less of pKa.;COPYRIGHT KIPO 2010
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