Refining and purifying method of diacetylmonoxime

A purification method and technology of butanone oxime, which is applied in the field of refining and purification of butanone oxime, can solve problems such as carbonization and coking of oxime products, pipe blockage, and easy carbon formation

Active Publication Date: 2021-08-24
ZHEJIANG JINHUA NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The refining and purification of butanone oxime is an essential step in the production process of butanone oxime, but because the oxime product is very easy to coke during the evaporation and gasification process, thereby blocking the pipeline and equipment, this is because the oxime product has a relatively high concentration of metal ions. Strong complexation, the complex has a higher boiling point, and the catalytic effect of metal ions makes the oxime product easy to carbonize and coke at the evaporation temperature

Method used

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  • Refining and purifying method of diacetylmonoxime
  • Refining and purifying method of diacetylmonoxime
  • Refining and purifying method of diacetylmonoxime

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A kind of refining purification method of butanone oxime, its scheme is:

[0026] Put 100kg of toluene-butanone oxime solution into the organic-inorganic separator, separate the inorganic phase through a centrifuge at a speed of 8000r / min, then enter the toluene-oxime tank, and pump it into the rectification system for separation; The above is a two-stage rectification system. The toluene-butanone oxime solution first enters the middle of the first rectification tower. The internal temperature of the first rectification tower is 120°C, and the top reflux temperature is 35°C. Most of the toluene is evaporated and condensed. Reflux to the toluene tank, the crude butanone oxime enters the middle of the second rectification tower from the bottom of the first rectification tower, the temperature in the middle of the second rectification tower is 115°C, the toluene is evaporated, condensed and refluxed to the toluene tank, the crude butanone oxime is fed from the second rectif...

Embodiment 2

[0037] A kind of refining purification method of butanone oxime, its scheme is:

[0038] Put 200kg of toluene-butanone oxime solution into the organic-inorganic separator, separate the inorganic phase through a centrifuge at a speed of 12000r / min, then enter the toluene-oxime tank, and pump it into the rectification system for separation; The above is a two-stage rectification system. The toluene-butanone oxime solution first enters the middle of the first rectification tower. The internal temperature of the first rectification tower is 128°C, and the top reflux temperature is 40°C. Most of the toluene is evaporated and condensed. Return to the toluene tank, the crude butanone oxime enters the middle of the second rectification tower from the bottom of the first rectification tower, the temperature in the middle of the second rectification tower is 120°C, the toluene is evaporated, condensed and refluxed to the toluene tank, the crude butanone oxime is fed from the second recti...

Embodiment 3

[0047] A kind of refining purification method of butanone oxime, its scheme is:

[0048] Put 300kg of toluene-butanone oxime solution into the organic-inorganic separator, separate the inorganic phase through the centrifuge at a speed of 16000r / min, then enter the toluene-oxime tank, and pump it into the rectification system for separation; The above is a two-stage rectification system. The toluene-butanone oxime solution first enters the middle of the first rectification tower. The internal temperature of the first rectification tower is 135°C, and the top reflux temperature is 45°C. Most of the toluene is evaporated and condensed. Return to the toluene tank, the crude butanone oxime enters the middle part of the second rectification tower from the bottom of the first rectification tower, the temperature in the middle part of the second rectification tower is 125 °C, the toluene is evaporated and condensed and refluxed to the toluene tank, the crude butanone oxime is fed from ...

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Abstract

The invention relates to the field of chemical industry, and in particular, relates to a refining and purifying method of diacetylmonoxime, wherein the method comprises the steps: firstly removing an inorganic phase in a toluene-diacetylmonoxime solution, then removing toluene through a secondary distillation system to obtain a diacetylmonoxime crude product, and then adsorbing through a metal ion adsorption resin to remove a small amount of metal ions in the diacetylmonoxime crude product. Therefore, a diacetylmonoxime product is prevented from being carbonized and coked at high temperature of a thin film evaporator to block a pipeline and influence the evaporation efficiency, conditions are created for long-period operation of evaporation equipment, frequent equipment cleaning work is avoided, resources are saved favourably, and the production efficiency is improved; and the metal ion adsorption resin disclosed by the invention is relatively high in metal adsorption rate, and the content of metal ions in the diacetylmonoxime crude product can be reduced to the greatest extent.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for refining and purifying butanone oxime. Background technique [0002] As a chemical oxygen scavenger, butanone oxime has the advantages of low toxicity, high efficiency and fast speed. High-purity butanone oxime can be used to synthesize silicone cross-linking agent, silicon curing agent, isocyanate blocking agent, and also play an anti-skinning role in the storage and transportation of oil-based paints, alkyd paints, epoxy ester paints, etc. [0003] CN1556096A relates to a process for producing acetone oxime or butanone oxime by oxidation of acetone or butanone. It belongs to the production technology of acetone oxime and butanone oxime. This process dissolves acetone or butanone in isopropanol or tert-butanol according to the dosage of 100-200g solvent / mol ketone, and adds TS-1 catalyst and Add ammonia in the amount of 1.2-2mol ammonia / mol ketone to prepare the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C249/14C07C251/38B01J20/26B01J20/30C08F292/00C08F212/14C08F230/08C08F228/04
CPCC07C249/14B01J20/264C08F292/00C07C251/38C08F212/30C08F230/085C08F228/04
Inventor 周强段仲刚江煜茅志清吴汉文马剑廖志华
Owner ZHEJIANG JINHUA NEW MATERIALS
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