PROCESS FOR PRODUCING CHLORINE

摘要

Improved process for producing chlorine molecules comprises oxidn. of hydrochloric acid with molecular oxygen. This oxidn. process is carried out in the presence of a catalyst, and chromium oxide. The chromium oxide is prepd. by (1) chromium oxide is carried on a silicon oxide carrier which has a porosity of 0.3-1.8 cc/g, with amt. of carried chromium oxide evaluated as chromia, of 20-90 wt.%, (2) carried chromium oxide is heat treated at 450-700 deg.C. The chromium oxide catalyst is obtd. by contacting aq.soln. of chromate anhydride or chromium salt with silicon oxide, and then drying and heat treating. The oxidn. reaction is carried out in a flow process at a temp. 350-430 deg.C in the presence of molecular oxygen. The molecular ratio of oxygen to HCl lies between 0.25-5 and the flow rate of HCl is 200-1800 Nl/Kg catalyst/hour. The radius of the porous holes in the silicon oxide carrier lies between 20 and 300 Angstroms.