Gas-liquid reaction device

A gas-liquid reaction and reaction tank technology, applied in the field of gas-liquid chemical reaction, can solve the problems of low efficiency, complicated operation, and difficulty in achieving sufficient mixing, and achieve the effects of reducing maintenance costs, improving mass transfer efficiency, and extending service life

Inactive Publication Date: 2013-05-01
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, even if an improved gas-liquid reaction device is made, due to gas-liquid mass transfer hindrance may cause gas-liquid to pass in parallel in the pipeline, it is difficult to achieve sufficient mixing, thereby reducing the efficiency of mass transfer and mixing, and the reaction device can only realize gas recombination in a single way. Circulation into the device, or the realization of liquid recirculation into the device, the reaction device cannot be intelligent, the efficiency is low, and the operation is complicated

Method used

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  • Gas-liquid reaction device

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Effect test

Embodiment 2

[0021]Embodiment 2: Use the gas-liquid reaction device of the present invention to synthesize 2,3-butanedione-oxime, butanone and ethyl nitrite undergo a chemical reaction to prepare 2,3-butanedione-oxime, and the chemical reaction occurs at Under normal pressure conditions, due to the large amount of exothermic reaction, the harmful gas ethyl nitrite will overflow the system, and it will be discharged in the form of tail gas to bring harm to the environment. Ethyl nitrate fully reacts, significantly reducing ethyl nitrite overflow system. The specific operation steps are as follows:

[0022] (1) Butanone solution enters the reaction tank through the feed port, set the temperature of the heat exchanger at 48-55°C, start the condenser, close the exhaust port of the condenser, unscrew the one-way valve between the condenser and the gas chamber Valve, let the ethyl nitrite gas into the air chamber, start the circulation pump, the methyl ethyl ketone liquid passes through the cir...

Embodiment 3

[0023] Embodiment 3: The specific embodiment of the reaction device of the present invention used for amination reaction: the main process route for the production of tertiary amines in my country is fatty alcohol catalytic amination method, and the alcohol amination process of most manufacturers adopts the form of stirred tank . The stirred tank reactor has a simple structure and is easy to manufacture, but its mass transfer problem cannot be well solved, and the gas-liquid double-circulation reactor form can strengthen the mass transfer process between the gas-liquid-solid three-phase and solve the above problems .

[0024] Adopting the device of the present invention, using high-grade fatty alcohol and dimethylamine gas as raw materials, adopting a copper-based three-way price change catalyst to produce high-grade fatty tertiary amines, the production process is the same as in Example 2, and finally the product of high-grade fatty tertiary amines is obtained The mass fracti...

Embodiment 4

[0025] Embodiment 4: The application of the device of the present invention in oxidation reaction, such as p-cresol as raw material to produce vanillin products, the key intermediate of which is p-hydroxybenzaldehyde. The catalytic oxidation of p-cresol to produce p-hydroxybenzaldehyde is a typical gas-liquid two-phase reaction process involving a solid catalyst. Since the oxygen used in the reaction has a small solubility in solvents such as methanol or ethanol, the oxygen reacts with p-cresol in the solvent The size of the rate is directly controlled by the gas-liquid mixing efficiency. By adopting the gas-liquid reaction device of the present invention, p-cresol and oxygen can be fully mixed and reacted in the gas-liquid mixing tube, flaring tube and draft tube A, which greatly improves the gas-liquid mixing mass transfer efficiency and the effective efficiency of p-cresol. Conversion rate, the specific method is: add methanol 1800mL and p-cresol 216g+100g potassium hydroxi...

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Abstract

The invention discloses a gas-liquid reaction device which comprises a reaction tank, wherein a gas-liquid mixing reactor is fixed inside the reaction tank; the reaction tank is communicated with the gas-liquid mixing reactor through a circulation pipe; a circulation pump is in series connection with a circulation pipeline; and the gas-liquid mixing reactor is a structure formed by connecting a gas chamber with a flow guide component through a gas-liquid mixing pipe. The device has the advantages that double circulation of gas-liquid materials can be realized; gas and liquid are fully mixed; the mass transfer efficiency of a chemical reaction is remarkably improved; raw materials are fully used; when a solid catalyst is needed, the liquid and the catalyst form a suspended solution with an agitator, so that the catalyst can circulate smoothly in the reaction device; the service life of the device is prolonged; and the maintenance cost of the device is lowered.

Description

technical field [0001] The invention relates to the technical field of gas-liquid chemical reaction, in particular to a gas-liquid reaction device. Background technique [0002] There are a large number of gas-liquid reactions in the chemical industry, such as the treatment of industrial waste gas, catalytic hydrogenation, amination reactions, etc. The commonly used gas-liquid reaction devices include absorption towers, venturi tubes, jet injectors, etc. Absorption The liquid in the tower is sprayed from top to bottom from the top of the tower, and the gas is sprayed from the bottom to realize the chemical reaction of gas-liquid mixing. The jet injector uses the jet port to form a negative pressure to suck the gas, so as to realize the gas-liquid mixing. However, the above several gas-liquid reaction devices cannot fully mix the gas-liquid, the chemical reaction time is long, the efficiency is low, and the raw material consumption is large. Therefore, technicians have tried ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/18
Inventor 张颂培陈英仔王丹姚静芳
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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