A colorless, transparent liquid with an odor similar to ether. Can dissolve a variety of substances (such as rubber, resin, fat, AlCl3, S, I2, HgCl2), non-flammable. Sexual stability. When there is no air, moisture and catalyst, it is heated to 500 ° C and is still stable. Resistance to hydrolysis. The freezing point is about -22.0ºC, the boiling point is 121ºC, 33.2ºC (4.0kPa), the relative density is 1.6230 (20/4ºC), and the refractive index is 1.50547. No flash point. It is miscible with ethanol, ether, chloroform and benzene. Dissolved in about 10,000 times the volume of water.
1. Ethylene method This method can co-produce trichloroethylene and tetrachloroethylene, divided into the following two methods. a. Direct chlorinated ethylene and chlorine are reacted in 1, 2-dichloroethane solution containing FeCl3 catalyst at 280-450ºC to form 1, 2-dichloroethane, which is further chlorinated into trichloroethylene and tetrachloroethylene, which are neutralized by NH3 after distillation; For washing; Dry and get the finished product. b. Oxygen chlorination process to ethylene and chlorine addition to produce 1, 2-dichloroethane, 1, 2-dichloroethane and chlorine, oxygen in CuCl2 and KCl as catalysts and at 425ºC, 138-207kPa oxygen chlorination reaction, the product after cooling, washing, drying after distillation, high purity products. 2. Hydrocarbon oxidation method chlorinated pyrolysis of hydrocarbon mixtures containing methane, ethane, propane, propylene, etc. at 50-500ºC to obtain a mixture of chlorinated hydrocarbons, which are separated into various products after distillation. 3. Acetylene method acetylene and chlorine are heated to chlorinate to produce 1,1,2, 2-tetrachloroethane, and hydrogen chloride is removed by alkali to obtain trichloroethylene, and then pentachloroethane is chlorinated, and then hydrogen chloride is removed by alkali to obtain tetrachloroethylene. Because of the high price of acetylene, it has been gradually replaced by ethylene method.
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