Cleaner production method for synthetizing chloromethane
A technology for clean production and methyl chloride, applied in chemical instruments and methods, preparation of halogenated hydrocarbons, disproportionation separation/purification of halogenated hydrocarbons, etc., to achieve the effects of wide pressure range and reduced unit energy consumption
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[0074] Example 1
[0075] A clean production method for synthesizing methyl chloride. In this embodiment, both the primary reactor and secondary reactor used are tower reactors, and the shells of both are made of graphite composite carbon fiber materials. According to different needs, in other embodiments, the shells of both the primary reactor and the secondary reactor can also be made of steel lining enamel or steel composite special engineering plastics.
[0076] The first reactor and the second reactor are equipped with a reaction zone and a washing zone from bottom to top. The reaction is divided into a bubbling reaction zone and a gas phase reaction zone. The gas phase reaction zone is above the bubbling reaction zone. , A gas distributor is arranged in the bubbling reaction zone, and a washing liquid distributor is installed above the washing zone. In this embodiment, the gas distributor is made of graphite material, and atomizing nozzles are installed on the gas distributo...
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[0098] Example 2
[0099] This embodiment is basically the same as the embodiment, and the difference is that:
[0100] 1) Synthesis steps of methyl chloride:
[0101] 1.1 Gas-phase hydrogen chloride with a pressure of 0.5MPa and gas-phase methanol with a pressure of 0.5MPa enter the bubbling reaction zone of the first-stage reactor through the gas distributor of the first-stage reactor at a molar ratio of 1.2:1, and then pass through the first-stage reactor The reaction is continued in the gas phase reaction zone of the first-stage reactor, the outlet gas velocity of the gas distributor of the first-stage reactor is 5-10m / s, the catalyst aqueous solution in the first-stage reactor is zinc chloride aqueous solution, and the raw material mixture is reacted in the first-stage reactor The reaction time of the zone is maintained at 40~45s.
[0102] The reaction temperature in the reaction zone of the first-stage reactor is 155℃, the reaction pressure is 0.4MPa, and the first-stage crude ...
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