sulfuric acid T=40°C; 1.5 h;

sulfuric acid T=50°C; 1.5 h;

1: 1.) 12.5percent fuming sulfuric acid; 2.) KCl / 1.) 60 deg C, 14 h; 2.) water, 60 min 2: 1.) 98percent nitric acid; 2.) KCl / 1.) 90 deg C, 18 h; 2.) water, 30 min 3: 83.5 percent / hydrogen / Raney-nickel / H2O / Ambient temperature View Scheme