| 摘要 |
Preparation of dinitriles from butadiene using an organometallic catalyst system and acidic promoter with separation and recovery of the catalyst. Preparation of dinitriles by hydrocyanation of unsaturated compounds in the presence of a catalytic system comprising an organometallic complex formed by one or more monodentate organophosphorus ligands and one or more bidentate organophosphorus ligands, and, optionally, a Lewis acid type promoter, with a stage of separation by distillation of a reactant used in the process .The reaction mixture for separation has a ratio of moles of organophosphorus ligands(as atoms of P) to atoms of metallic element less than or equal to 15 and/or a wt. concentration of metallic element less than or equal to 1.3%.The base temperature of the distillation column is less than or equal to 180[deg]C. The preferred metallic element is Ni. |
