Synthesis rectifying method and equipment of methane chloride

A technology of monochloromethane and process method, which is applied in the field of synthesis and rectification process method of monochloromethane and its equipment, can solve the problems of low reaction yield, high energy consumption of dimethyl ether extraction process, instability in the later stage of operation, etc. To achieve the effect of increasing the reaction yield

Active Publication Date: 2018-12-25
南京佳华工程技术有限公司
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Problems solved by technology

[0008] Therefore adopt the main problem of existing technology as follows: 1. contain raw material methanol in the waste water of reflux tank discharge, cause reactant to consume greatly; Biochemical bacteria; 3. Methanol is entrained to the downstream water washing tower, resulting in the production of hydrochloric acid COD exceeding the standard, which cannot be directly used and can only be processed by outsourcing; 4. Methanol is entrained to the downstream alkali washing tower, resulting in the production of alcohols with high salt and high COD Waste water cannot be used, and can only be incinerated by outsourcing; 5. The h...

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  • Synthesis rectifying method and equipment of methane chloride

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Embodiment 1

[0044] Embodiment 1: as figure 1 As shown, take 99.9%wt methanol 1mol and 99.5%wt hydrogen chloride 1.01mol, the feed pressure is 200kpag, the feed temperature is 150°C, the operating pressure of reactor 1 is 100kpag, the reaction temperature is 160°C, after bubbling reaction Afterwards, the top discharge of reactor 1 is hydrogen chloride 1.81%wt, methanol 32.3%wt, monochloromethane 47.6%wt, dimethyl ether 0.09%wt, water 17.4%wt enters reactive distillation tower 2, operating pressure 80kpag, tower top The temperature is 45°C, 45 theoretical plates, 15 plates at the feed plate position, the reflux ratio is 3.5:1, 10 plate positions for the side line production, and the mass ratio of the methanol flow rate of the side line production to the feed flow rate is 0.12%. The flow rate of methanol extracted from the side line of the reactive distillation tower is 32.84kg / h (circulation stream flow rate), the purity is 99.9%wt, the gas phase at the top of the tower is 51.22kg / h, and th...

Embodiment 2

[0045] Embodiment 2: as figure 1As shown, take 99.9%wt methanol 1mol and 99.5%wt hydrogen chloride 1.0mol, the feed pressure is 180kpag, the feed temperature is 170°C, the operating pressure of reactor 1 is 80kpag, and the reaction temperature is 170°C, after bubbling reaction Afterwards, the top discharge of reactor 1 is hydrogen chloride 1.56%wt, methyl alcohol 41.2%wt, monochloromethane 41.1%wt, dimethyl ether 0.01%wt, water 15.1%wt enters reactive distillation tower 2, operating pressure 70kpag, tower top The temperature is 42°C, 50 theoretical plates, 19 feed plate positions, 2.8:1 reflux ratio, 5 side line production plates, and the mass ratio of side line production methanol flow to feed flow is 0.11%. The methanol flow rate extracted from the side line of the reactive distillation tower is 48.06kg / h (circulation stream flow rate), the purity is 99.9%wt, the gas phase at the top of the tower is 50.94kg / h, and the composition is 3.6%wt of hydrogen chloride and 94.2%wt of...

Embodiment 3

[0046] Embodiment 3: as figure 1 As shown, take 99.9%wt methanol 1mol and 99.5%wt hydrogen chloride 1.0mol, the feed pressure is 220kpag, the feed temperature is 150°C, the operating pressure of reactor 1 is 110kpag, and the reaction temperature is 150°C, after bubbling reaction Afterwards, the top discharge of reactor 1 is hydrogen chloride 1.45%wt, methyl alcohol 31.9%wt, monochloromethane 48.2%wt, dimethyl ether 0.01%wt, water 17.6%wt enters reactive distillation tower 2, operating pressure 90kpag, tower top The temperature is 38°C, 38 theoretical plates, 16 plates at the position of the feed plate, the reflux ratio is 2.5:1, 10 plates at the position of the side line extraction plate, and the mass ratio of the methanol flow rate of the side line output to the feed flow rate is 0.1%. The methanol flow rate extracted from the side line of the reactive distillation tower is 32.04kg / h (circulation stream flow rate), the purity is 99.9%wt, the gas phase at the top of the tower ...

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Abstract

The invention discloses a synthesis rectifying method and equipment of methane chloride and belongs to the field of chemical methane chloride and organic silicon. According to the technical scheme, the method includes the steps of firstly, feeding raw material methanol and hydrogen chloride into a reactor, performing bubbling reaction to obtain a mixture of methanol, dimethyl ether, methane chloride, hydrogen chloride and water, and feeding the mixture into a reaction rectifying tower for rectifying; secondly, feeding the mixture discharged from the top of the reaction rectifying tower in thefirst step into a washing tower for washing so as to absorb the hydrogen chloride; thirdly, feeding the gas-phase material obtained after the second step into an alkali washing tower reactor to removeall the hydrogen chloride so as to obtain a gas-phase material at the top of the alkali washing tower; fourthly, feeding the gas-phase material obtained after the third step into an extraction rectifying tower to obtain the methane chloride at the top of the extraction rectifying tower. The method is low in investment, low in energy consumption, little in three waste, high in yield, capable of eliminating the environment pollution of an original process and capable of recovering the high-additional-value product.

Description

technical field [0001] The invention relates to the field of chemical methane chloride and organic silicon, in particular to a method for synthetic rectification of monochloromethane and equipment thereof. Background technique [0002] Chloromethane is the main raw material for the production of organosilicon, and 50% to 90% of the world's monochloromethane is used for the production of organosilicon. There are two main methods for the production of chloromethane: liquid-phase catalytic method and gas-phase hydrochlorination method. At present, the liquid phase catalytic method is mainly used in China. In this method, gaseous methanol and hydrogen chloride are mixed into the reactor as raw materials, and the main reactions are as follows: [0003] CH 3 OH+HCL→CH 3 CL+H 2 o [0004] 2CH 3 OH→CH 3 OCH 3 +H 2 o [0005] The gas-liquid bubbling catalytic reaction is carried out under the action of a liquid catalyst. The gas phase coming out of the reactor is directly...

Claims

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Application Information

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IPC IPC(8): C07C17/16C07C17/383C07C17/38C07C19/03C07C41/09C07C41/42C07C43/04
CPCC07C17/16C07C17/383C07C41/09C07C41/42C07C19/03C07C43/043
Inventor 谢佳华赵怡
Owner 南京佳华工程技术有限公司
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