Patent ID: 9371259
Filing Date: 2016-06-21
CPC Classification: C07C,Y02P

Claim Text:
1. A method for preparing vinyl chloride, comprising: 1) mixing acetylene, dichlorethane vapor and optionally hydrogen chloride gas to obtain a raw mixed gas, wherein the raw mixed gas has a molar ratio of acetylene:dichlorethane:hydrogen chloride gas at 1:(0.3-1.0):(0-0.20); 2) preheating the raw mixed gas to a preheating temperature to obtain a preheated raw mixed gas; 3) feeding the preheated raw mixed gas into a reactor containing a catalyst; 4) cooling an effluent gas from the reactor to 30-50° C., pressurizing the effluent gas to 0.4-1.0 MPa, and cooling the pressurized effluent gas to ambient temperature, and further cooling the pressurized effluent gas from ambient temperature to −25-15° C. to obtain a liquid; and 5) feeding the liquid to a rectifying tower for rectification, and obtaining vinyl chloride from the rectifying tower.