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Cyclohexanone ammoximation production system and method

A technology of cyclohexanone amidoxime and production system, which is applied in the field of caprolactam oximation, can solve the problems of unutilized heat energy of gas phase at the top of the tower, increase the cost of wastewater treatment, increase the discharge amount of wastewater, etc., so as to reduce the amount of wastewater generated and increase the load. The effect of adjusting the range and reducing the discharge amount

Pending Publication Date: 2022-08-02
LIAOCHENG MEISI NEW MATERIAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. A circulating water condenser is required to condense the gas phase at the top of the tert-butanol recovery and refining tower into a liquid phase product. While consuming circulating water, the heat energy of the gas phase at the top of the tower has not been utilized
[0005] 2. The concentration of hydrogen peroxide used as raw material for oximation reaction is low. The waste water generated by the system mainly comes from the conversion product of raw material hydrogen peroxide and the water brought by itself. The low concentration of hydrogen peroxide results in a lot of waste water discharged from the system. The water washing system uses additional desalted water for cleaning. Increased wastewater discharge, which in turn increases wastewater treatment costs

Method used

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  • Cyclohexanone ammoximation production system and method

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Embodiment 1

[0030] The present embodiment provides a cyclohexanone ammoximation production system, such as figure 2 As shown, an oximation reactor 1 is included, and the oximation reactor 1 can use tert-butanol as a solvent to react the introduced hydrogen peroxide, cyclohexanone and gaseous ammonia to produce cyclohexanone oxime.

[0031] The oximation reactor 1 is connected with the tert-butanol recovery and purification column 2, and the reaction product of the oximation reactor 1 can be sent to the tert-butanol recovery and purification column 2, and the tert-butanol recovery and purification column 2 separates the reaction product, and the tert-butanol is recovered and purified. The column bottom liquid phase pipe of the alcohol recovery and purification tower 2 is connected to the extraction system 3, and the separated oxime aqueous solution, that is, the cyclohexanone oxime solution, can be discharged into the extraction system 3, and the extraction system 3 can adopt the existing ...

Embodiment 2

[0045] The present embodiment discloses a working method of the cyclohexanone ammoximation production system described in Embodiment 1:

[0046] In the oximation reactor 1, hydrogen peroxide, cyclohexanone and ammonia gas are added according to the set ratio, and tert-butanol is added as a solvent, and the reaction occurs in the oximation reactor 1 to produce cyclohexanone oxime, and the oximation reactor The reaction product is discharged into the tert-butanol recovery and purification tower 2, the tert-butanol recovery and purification tower 2 works, and the oxime aqueous solution generated during operation is discharged into the extraction system 3 by using the liquid phase pipe of the tower body, and the extraction system 3 adds toluene to the discharge. The extracted oxime aqueous solution is extracted, and the process water in the oxime aqueous solution is removed. The extracted toluene and cyclohexanone oxime mixture enters the water washing system 4 for washing, and the...

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Abstract

The invention relates to a cyclohexanone ammoximation production system and method, and the system comprises an oximation reactor, the oximation reactor is connected with a tert-butyl alcohol recovery refining tower, the tert-butyl alcohol recovery refining tower is connected with an extraction system, the extraction system is connected with a washing system, the washing system is connected with a wastewater stripping tower and a toluene and cyclohexanone oxime refining system, and the wastewater stripping tower is connected with a wastewater stripping tower. A tower top condenser of the tertiary butanol recycling and refining tower is connected with the oximation reactor through a reflux tank, a wastewater discharge pipe of the wastewater stripping tower is connected with a tube pass inlet of a reboiler of the wastewater evaporation tower, and a tower top gas phase pipe of the tertiary butanol recycling and refining tower is connected to a shell pass inlet of the reboiler of the wastewater evaporation tower; and a shell pass outlet of the reboiler is connected to an inlet of a tower top condenser of the tertiary butanol recovery refining tower. By adopting the production system and method disclosed by the invention, the wastewater discharge amount is small.

Description

technical field [0001] The invention relates to the technical field of caprolactam oximation, in particular to a cyclohexanone ammoximation production system and method. Background technique [0002] The statements herein merely provide background related to the present invention and do not necessarily constitute prior art. [0003] Traditional cyclohexanone ammoximation production process and system such as figure 1 As shown, under the condition that tert-butanol is used as the solvent, hydrogen peroxide, ammonia gas and cyclohexanone with a concentration of 27.5wt% are reacted in a certain proportion to generate cyclohexanone oxime, and cyclohexanone oxime is recovered by the tert-butyl alcohol recovery and purification tower. The alcohol is recycled to the reactor, the oxime aqueous solution at the bottom of the tower is sent to the extraction post, and toluene is used as the extractant to extract the cyclohexanone oxime from the p-oxime aqueous solution, and the process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C249/04C07C249/14C07C251/44C07C29/80C07C31/12C02F1/04C02F1/16
CPCC07C249/04C07C249/14C07C29/80C02F1/16C02F1/048C07C2601/14C07C251/44C07C31/12Y02P20/10
Inventor 刘福青郭平颜丙来陈元彬魏传国常凤超丁兵王怀涛
Owner LIAOCHENG MEISI NEW MATERIAL TECH CO LTD
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