Method of producing methane chloride by using byproduct hydrogen chloride of tetrachloroethylene device

The invention provides a method for producing methane chloride by using byproduct hydrogen chloride of a tetrachloroethylene device. The method comprises the steps of: (a) condensing the byproduct hydrogen chloride of the gaseous raw material tetrachloroethylene device, and separating to remove the liquid-phase impurities so as to obtain gas-phase hydrogen chloride, wherein a condensing outlet is at temperature of 40 DEG C; (b) heating the hydrogen chloride obtained by purifying in the step (a) to reach the temperature of 100 to 120 DEG C, and mixing with the carbinol at 100 to 120 DEG C from a carbinol evaporator (4) according to the volume ratio of 1.2: 1, and then introducing the mixture into a reactor (6), and reacting in the presence of 50-80% zinc chloride solution to produce methane chloride; and (c) quickly moving the reactive gas-phase component prepared in step (b) out of the reactor (6), and sequentially processing the reactive gas-phase component by condensing, washing with water, neutralizing with alkaline liquor, drying with vitriol, compressing, and then processing through a rectifying column (11). The method provided by the invention is efficient, simple, and fully utilizes the chloride resource.