METHOD FOR PREPARING CATALYST SOLUTION

摘要

PROBLEM TO BE SOLVED: To provide a method for preparing a catalyst solution for efficiently producing a polyketone composed of carbon monoxide and ethylene. SOLUTION: In a method for producing the polyketone having 95-100 mol% repeating unit of 1-oxotrimethylene by bringing carbon monoxide and ethylene into contact with a catalyst solution in a solvent, the above catalyst solution is prepared by the order of (1) a step of dissolving a palladium salt compound and a phosphorus bidentate ligand represented by formula: R1R2P-R-PR3R4in an aprotic polar solvent or a lower alcohol to prepare a solution A and (2) a step of adding an acid represented by formula: R5-SO3H to the solution A. COPYRIGHT: (C)2004,JPO