zinc(II) chloride T=155 - 160°C; 12 h;

hydrogenchloride; aluminium trichloride 1.) 1,1,2,2-tetrachloroethane, AlCl3 addn. in two parts at 90 degC, 1 h and at 100 degC, 1h; 2.) 130-140 degC, 5 h; 3.) cooling; Multistep reaction;