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The preparation of
Method :1. Natural gas chlorination method natural gas reacts with chlorine gas, absorbs hydrochloric acid byproduct of hydrogen chloride through water, removes residual trace hydrogen chloride with lye, and then dries, compresses, condenses and distills the finished product. Among them, chlorine 100% 4000, natural gas (standard condition), methane 97% 1000m/t, liquid alkali 100% 274.
Chloromethane and chlorine gas react under 4000kW light to produce dichloromethane, which is finished by alkali washing, ju shrinkage, condensation, drying and distillation. Main by-product trichloromethane. Chloromethane ≥98% 746, liquid chlorine ≥99.5% 854, caustic soda 30% 221.
Industrial synthesis is generally done by chlorination of methane. The chlorination of methane yields a mixture of four chloromethane compounds, which can be easily separated and purified by ordinary fractionation techniques because of the large distance between the boiling points.
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