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Verspui, G.A. (author), Sheldon, R.A. (author)Use of an acid catalyst to improve yields in the preparation of polyketones in aqueous medium by polymerising a mixture of CO and alkylenically unsaturated hydrocarbons in the presence a catalyst composition comprising a group VIII metal and a ligand. Process for preparing a polyketone in aqueous medium by polymerising a mixture of CO and an...patent 1999