1. Thermal chlorination of methane is formed by direct chlorination of methane and then separated from various generated chlorides. The production process of this method is similar to that of dichloromethane. Under the reaction condition of 420℃, when the ratio of methane to chlorine is 10-6: 1, methyl chloride is mainly obtained.
2. Methanol chlorination is obtained by the reaction of methanol and hydrogen chloride. This method is divided into liquid phase method and gas phase method.
(1) liquid phase method: methanol gas reacts with hydrochloric acid in zinc chloride aqueous solution at 130- 140℃ to generate methyl chloride, which is then washed with water, cooled, compressed and condensed.
(2) Gas phase method: methanol and hydrogen chloride gas react with solid alumina catalyst at 350℃. In addition, Cao De Company used methanol and chlorine as raw materials to produce methyl chloride, improved the high-temperature gas phase method and realized industrialization.