A kind of production device and production method of tertiary amine

Abstract

The invention discloses a tertiary amine production device, which comprises an evaporator, a circulation pump, an amination reactor, a gas-liquid separator, a cooler A, a cooler B, an oil-water separator, a buffer tank, a recovery kettle, a heat exchange device; the present invention installs a gas-liquid separator equipped with metal corrugated packing in the circulation gas pipeline of the amination reactor, utilizes the oil phase separated in the oil-water separator to spray on the top of the gas-liquid separator, and the gas-liquid separator in the gas-liquid separator The gas phase undergoes reverse heat exchange, the heavy oil phase is condensed and flows back to the reactor, and the uncondensed gas phase continues to pass through cooler A and cooler B. At the same time, the invention also provides a production method for tertiary amine using the device. The production device and production method of the tertiary amine of the present invention have the advantages of good oil-water separation effect, shortened reaction time and increased yield.

Description

technical field [0001] The invention relates to the technical field of tertiary amine production, in particular to a tertiary amine production device and a production method thereof. Background technique [0002] Mono-long-chain alkyl tertiary amines are an important class of fatty alcohol amines, especially tertiary amines with a carbon chain length of C8-C18. They are mainly used as raw materials for the production of cationic surfactants, zwitterionic surfactants and amine oxides. It has an irreplaceable role in the fields of sterilization and disinfection, fabric softness, washing foam enhancement, antistatic and metal slow release. In the existing process, the production methods of tertiary amine mainly include: haloamination method and fatty alcohol catalytic amination method. The haloamination method has problems such as equipment corrosion and environmental pollution, and the product quality is not high, so it has been basically eliminated. . [0003] The process o...

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Problems solved by technology

[0006] (1) The mixed gas in the oil-water separation process is seriously loaded with material, causing the liquid level of the amination reactor 100 to decrease;

[0007] (2) The pressure in the amination reactor 100 is high. As the circulating gas is condensed, the pressure gradually decreases, and there is a pressure difference, which causes the liquid phase separated by the tertiary amine separator 400 and the oil-water separator 500 to fail to flow back to the amination reactor 100 smoothly. , causing the liquid levels of the tertiary amine separator 400 and the oil-water separator 500 to rise continuously;

[0008] (3) The mixed air-condensate enters the oil-water separator 500 from above, and the oil-water mixture entering the oil-water separator 500 is automatically stratified depending on its own density, the efficiency is low, and the stratification is not complete, resulting in a large amount of material in the separated water;

[0009] (4) The fatty alcohol catalyzed amination reactor 100 adopts a stirred tank reactor, and there is a mass transfer obstacle between the gas-liquid-solid three-phase

Poor mass transfer results in long reaction times and poor reaction quality

[0010] Therefore, the circulating gas of the existing tertiary amine reaction system carries a large amount of fatty alcohol and tertiary amine, which leads to a decrease in the liquid level of the reactor, poor water separation effect, which affects the progress of the forward reaction, and poor catalyst effect, which leads to low reaction efficiency and increased by-products, which seriously affect the tertiary amine. production quality and efficiency

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