A process for purifying a high-purity hydrogen chloride in the method of tetrachlorethylene apparatus

The present invention relates to the purification of hydrogen chloride, and in particular relates to a method for purifying a high-purity hydrogen chloride in tetrachlorethylene apparatus. Tetrachlorethylene chlorinated gas from the feed unit through a drying tower sulphate dehydrated and dried, after drying the pressurized gas enters the hydrogen chloride distillation column, the use of different materials for each of the boiling point of separation and purification, to obtain high-purity hydrogen chloride. By this means not only make the PCE comprises means generates 10-20% of the chlorine and HCl gas CCl4 be recycled, the less waste discharge obtained ≥99.8% of HCl gas to high value, but also the isolated pure chlorine gas CCl4 and vinyl chloride as the starting material the reaction system back to four. Improve the efficiency of the device.