| 摘要 |
<P>PROBLEM TO BE SOLVED: To establish a catalyst system in which disadvantages of prior arts are addressed and alleviated at least to some extent, although levels of a ligand and an acid are relatively high. <P>SOLUTION: A process for carbonylation of an ethylenically unsaturated compound includes a step to bring ethene, carbon monooxide, and a hydroxy group-containing compound into contact with one another in the presence of a catalyst system capable of catalyzing carbonylation of ethene, wherein the catalyst system is obtainable by combining: (a) palladium metal or a compound thereof, (b) a bidentate phosphine ligand, and (c) an acid with a pKa of less than 4 measured in an aqueous solution at 18°C, and wherein the ligand is present in molar excess of at least a 2:1 compared to the metal or the metal in the metal compound, and the acid is present in at least a 2:1 molar excess compared to the ligand. <P>COPYRIGHT: (C)2013,JPO&INPIT |
