| 摘要 |
<p>The invention relates to a process for the preparation of ε-caprolactam starting from butadiene, carbon monoxide, alkanol, hydrogen and ammonia, wherein the process comprises: 1. carbonylating butadiene in the presence of an alkanol and a catalyst comprising palladium, a multidentate phosphine ligand and an acidic co-catalyst to produce alkyl-3-pentenoate, 2. hydroformulating the alkyl-3-pentenoate in the presence of a catalyst comprising rhodium and a multidentate phosphite ligand to produce alkyl-5-formylvalerate, 5. reductively aminating alkyl-5-formylvalerate in the presence of a hydrogenation catalyst comprising ruthenium on a carrier catalyst to produce ε-caprolactam and ε-caprolactam precursors, 6., converting ε-caprolactam precursors at elevated temperature into ε-caprolactam.</p> |
