hydrogenchloride in ethanol 18 h; Heating; Yield given;

1: 20percent aq. HCl / aq. ethanol / 18 h / Heating 2: p-toluenesulfonic acid / benzene / Heating View Scheme

1: 20percent aq. HCl / aq. ethanol / 18 h / Heating 2: p-toluenesulfonic acid / benzene / Heating 3: 1.) 80 deg C, 3 h, 2.) 130 deg C, 30 min View Scheme