Synthesis method and device of methane chloride

Abstract

The invention discloses a reaction packed tower for methane chloride production. The reaction packed tower comprises a tower body, the lower part of the tower is provided with a methanol steam and hydrogen chloride inlet, a discharge port and an emptying port, the top of the tower is provided with a reflux inlet, the discharge port is connected with an external reflux pump, the reflux pump circulates the material discharged from the bottom of the tower to the top of the tower for reflux, and the interior of the tower body is divided into an upper section of packing and a lower section of packing. A methanol steam side line feeding hole is additionally formed between the two sections of fillers; and methanol evaporators are arranged on methanol steam feeding lines. The invention also provides a method for synthesizing methane chloride by adopting the device. The gas-liquid mass transfer efficiency can be effectively improved, the generation of byproducts is reduced, the hydrochloric acid conversion rate is improved, the pressure is relieved for subsequent deacidification and drying procedures, the production capacity is high, the operation flexibility is high, and the working performance is good.

Description

technical field [0001] The invention relates to the production technology of organosilicon monomers, in particular to a method for synthesizing monochloromethane and a device thereof. Background technique [0002] Chloromethane is the main raw material for the synthesis of organosilicon monomers. At present, the liquid phase catalytic method is mainly used in my country to synthesize HCl and methanol with zinc chloride aqueous solution as the catalyst in a gas-liquid bubbling reactor. The gas-liquid bubbling reactor is generally equipped with a gas distributor at the bottom of the enamel kettle. However, limited by the size of the enamel equipment processing kiln, the diameter of the enamel kettle is limited, thus restricting the maximum production capacity of the bubbling reactor. In addition, in the liquid-phase catalytic method, the conversion rate of HCl is low, and a large amount of dilute acid is produced, making it difficult to handle. The change of alkyd-acid ratio...

AI Technical Summary

Problems solved by technology

However, these technical methods are still limited by the maximum operable gas velocity upper limit (20cm / s) of the bubble reactor, which cannot increase the production capacity

[0005] By improving the follow-up program settings and adding hydrochloric acid desorption recovery systems, such as CN205258343U and CN205257999U, to deal with a large amount of unreacted hydrogen chloride, but still can not solve the problem of more dimethyl ether by-products

[0006] Traditional bubbling reactors generally have a gas velocity of no more than 20cm / s, and after continuous operation, the reaction rate decreases, so it is difficult to achieve a greater conversion rate of reactants in a single reactor. For this reason, CN105985217B adopts multi-stage The bubbling reactors are connected in series, the reaction conditions are 50-300°C, and the pressure is 0.05MPa-0.5MPa to increase the conversion rate of reactants

Although multi-stage reactors connected in series can alleviate the problem of high by-product acid content to a certain extent, but the equipment occupies a large area and the investment is high

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