The invention provides processes for the recovery of a catalyst which are to be applied to the reactions wherein boron trifluoride or a complex thereof is used as the catalyst, that is, (I) a process for the recovery of a catalyst which comprises using as the reaction solvent a solvent containing a hydrofluorocarbon compound and/or an oxygenic hydrofluorocarbon compound and, after the completion of the reaction, separating the reaction solvent from the reaction mixture; and (II) a process for the recovery of a catalyst which comprises extracting boron trifluoride or a complex thereof from the reaction mixture after the completion of the reaction by using a hydro fluorocarbon compound and/or an oxygenic hydrofluorocarbon compound as the extracting solvent. According to the processes, boron trifluoride or complexes thereof used as catalyst can be easily separated from the reaction mixtures and re-used.
本发明提供的催化剂回收工艺适用于以
三氟化硼或其络合物为催化剂的反应,即 (I) 一种催化剂回收工艺,包括使用含有氢
氟碳化合物和/或含氧氢
氟碳化合物的溶剂作为反应溶剂,并在反应完成后将反应溶剂从反应混合物中分离出来;以及 (II) 一种催化剂回收工艺,包括在反应完成后使用氢
氟碳化合物和/或含氧氢
氟碳化合物从反应混合物中提取
三氟化硼或其络合物;(II) 一种催化剂回收工艺,该工艺包括在反应完成后,使用氢
氟碳化合物和/或含 氧氢
氟碳化合物作为萃取溶剂,从反应混合物中萃取
三氟化硼或其络合物。根据这些工艺,用作催化剂的
三氟化硼或其络合物可以很容易地从反应混合物中分离出来并重复使用。