Device and process for recycling trimethylamine

A recovery device and trimethylamine technology, applied in the field of trimethylamine recovery device and its recovery process, can solve the problems of people's direct and indirect economic losses, affect the normal life of human beings, and deteriorate the ecological environment of water bodies, so as to reduce the energy consumption of aeration, The effect of small footprint and simple layout

Active Publication Date: 2015-06-24
江苏金杉新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pollution of water bodies has caused great harm to the living environment of human beings. The ecological environment of water bodies is deteriorating day by day, which not only affects the normal life of human beings, but also restricts economic development, and causes huge direct and indirect economic losses to people.

Method used

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  • Device and process for recycling trimethylamine

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Experimental program
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Effect test

Embodiment 2

[0030] Embodiment 2: in the continuous distillation process, in 5000L reaction evaporator 1, add trimethylamine waste water continuously, trimethylamine concentration is 5-17% and dosage 1m3 / h, then continuously add 30% liquid caustic soda, The dosage of 30% liquid caustic soda is 1.5L / h, the pH of the adjusted solution is about 9, the temperature at the bottom of the reaction evaporator 1 is 98°C, and the temperature at the top of the reaction evaporator 1 is 89°C. The temperature at the bottom of the distillation tower 8 is 89° C., and the temperature at the top of the rectification tower 8 is 70° C. Trimethylamine escapes evenly. The concentration of trimethylamine recovered is 45%, and the concentration of trimethylamine in the raffinate is 0.4%.

Embodiment 3

[0031] Embodiment 3: in continuous distillation process, in 5000L reaction evaporation kettle 1, add trimethylamine waste water continuously, trimethylamine concentration is 5-17% and dosage 1m3 / h, then continuously add 30% liquid caustic soda, The dosage of 30% liquid caustic soda is 1.5L / h, the pH of the adjusted solution is about 9, the temperature at the bottom of the reaction evaporator 1 is 105°C, and the temperature at the top of the reaction evaporator 1 is 93°C. The temperature at the bottom of the distillation tower 8 is 93° C., and the temperature at the top of the rectification tower 8 is 78° C. Trimethylamine escapes evenly. The concentration of trimethylamine recovered is 45%, and the concentration of trimethylamine in the raffinate is 0.35%.

Embodiment 4

[0032]Embodiment 4: in continuous distillation process, in 5000L reaction evaporator 1, add trimethylamine waste water continuously, trimethylamine concentration is 5-17% and dosage 1m3 / h, then continuously add 30% liquid caustic soda, The dosage of 30% liquid caustic soda is 1.5L / h, the pH of the adjusted solution is about 9, the temperature at the bottom of the reaction evaporator 1 is 115°C, and the temperature at the top of the reaction evaporator 1 is 96°C. The temperature at the bottom of the distillation tower 8 is 96° C., and the temperature at the top of the rectification tower 8 is 94° C. Trimethylamine escapes evenly. The concentration of trimethylamine recovered is 45%, and the concentration of trimethylamine in the raffinate is 0.32%.

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Abstract

The invention discloses a device for recycling trimethylamine. The device comprises a reactive evaporation kettle, a rectifying column, a condenser, a gas-liquid separator, an absorption liquid intermediate tank, an absorption liquid intermediate pump and a clear water intermediate tank. Trimethylamine wastewater and liquid caustic soda react with each other in the reactive evaporation kettle, the trimethylamine flows into the rectifying column and flows into a cooler to be condensed after mass and heat are transferred by the aid of absorption liquid in the absorption liquid intermediate tank, the clear water intermediate tank and the absorption liquid intermediate pump, finished products are fed into the absorption liquid intermediate tank, and tail gas flows into the gas-liquid separator. The device has the advantages that the trimethylamine is recycled and absorbed by the aid of the absorption liquid intermediate tank, accordingly, the device is favorable for increasing the trimethylamine recycling concentration and high in trimethylamine recycling rate, is high in wastewater treatment capacity owing to separation effects of the rectifying column and the reactive evaporation kettle, is high in theoretical plate number, low in resistance loss and stable and reliable in performance, can run continuously or intermittently, has an automatic control function, can be cleaned in an online manner and is free of blockage, small in occupied area and simple in arrangement, reaction can be carried out in an online manner without device shutdown, and aeration energy consumption can be reduced.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a trimethylamine recovery device and a recovery process thereof. Background technique [0002] Trimethylamine (trimethylamine TMA) is the simplest tertiary amine. It is a colorless gas at room temperature. It has a fishy stench. It is soluble in water, ethanol and ether. It is flammable and toxic. The relative density of saturated aqueous solution is 0.66, and the relative density of air is 2.09. The molecular formula is C3H9N, which can be used as analytical reagent and aminated in organic synthesis. It is mainly used for medicine, pesticide, dyestuff and other organic synthesis raw materials, as well as for the synthesis of cationic etherification agent, for emulsification, solubilization, dispersion and wetting in pharmacy, and as flotation agent in synthesis. [0003] Water is a precious resource that human beings depend on for survival. With the rapid develop...

Claims

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Application Information

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IPC IPC(8): C07C211/04C07C209/86
Inventor 刘景明张结来
Owner 江苏金杉新材料有限公司
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