The influence of triethylamine on the hydrodechlorination reactivity of chlorophenols over Raney Ni catalyst

The hydrodechlorination (HDCl) of 2,4-dichlorophenol (2,4-DCP), 2-chlorophenol (2-CP) and 4-chlorophenol (4-CP) over Raney Ni in liquid phase with triethylamine (Et3N) under mild conditions was studied. The results showed that Et3N together with solvents significantly affected the HDCl reactivity or selectivity, in which ortho-positioned Cl of chlorophenols (CPs) was easier to be dechlorinated in methanol (MeOH) and ethanol (EtOH), whereas para-positioned Cl was preferentially dechlorinated in water. Different species and action mechanisms of Et3N in water and organic solvents possibly affected the HDCl reactivity or selectivity of CPs over Raney Ni.The hydrodechlorination (HDCl) of 2 4-dichlorophenol (2 4-DCP) 2-chlorophenol (2-CP) and 4-chlorophenol (4-CP) over Raney Ni in liquid phase with triethylamine (Et3N) under mild conditions was studied The results showed that Et3N together with solvents significantly affected the HDCl reactivity or selectivity in which ortho-positioned Cl of chlorophenols (CPs) was easier to be dechlorinated in methanol (MeOH) and ethanol (EtOH) whereas para-positioned Cl was preferentially dechlorinated in water Different species and action mechanisms of Et3N in water and organic solvents possibly affected the HDCl reactivity or selectivity of CPs over Raney Ni (C) 2010 Elsevier BV All rights reserve