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Method and device for recovering chloropropene and methanol from hydrogen peroxide method epoxy chloropropane process water layer

A technology for epichlorohydrin and chloropropene, which is applied in chemical instruments and methods, preparation of organic compounds, separation/purification of hydroxyl compounds, etc. Up to 99.9% and other problems, to achieve the effect of improving product quality, preventing proliferation and improving quality

Active Publication Date: 2020-11-20
JIANGSU YANGNONG CHEM GROUP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is directly returned to the epoxidation reaction, on the one hand, it will affect the stability of the catalyst, and on the other hand, the quality of the epichlorohydrin product will be poor, and it will be difficult to reach 99.9%.

Method used

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  • Method and device for recovering chloropropene and methanol from hydrogen peroxide method epoxy chloropropane process water layer
  • Method and device for recovering chloropropene and methanol from hydrogen peroxide method epoxy chloropropane process water layer
  • Method and device for recovering chloropropene and methanol from hydrogen peroxide method epoxy chloropropane process water layer

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Embodiment 1

[0102] This embodiment provides a method for reclaiming allyl chloride and methanol from the water layer of the hydrogen peroxide method epichlorohydrin process, such as figure 1 As shown, the device used in the method includes a first rectification unit, a second rectification unit, a washing unit and an adsorption unit 4; the first rectification unit includes a first rectification column 1; the first rectification unit The bottom of the distillation tower 1 is connected with the second rectification unit; the top of the first rectification tower 1 is connected with the washing unit; the washing unit is connected with the adsorption unit 4; the second rectification unit includes the second rectification tower 2 The washing unit includes a washing tower 3; the adsorption unit 4 includes an adsorption device; the adsorption device is two groups of adsorption devices arranged side by side, which are respectively the first adsorption tower 401 and the second adsorption tower 402; ...

Embodiment 2

[0115] This embodiment provides a method for recovering allyl chloride and methanol from the water layer of the hydrogen peroxide method epichlorohydrin process, the method comprising the following steps:

[0116] (1) the solution to be treated is fed from the lower feed port of the first rectifying tower, separated through the first rectification, the tower still obtains the tower still product, and the tower top obtains the tower top product;

[0117] The content of methanol in the solution to be treated is 20wt%, and the content of 3-chloropropene is 0.6wt%; the content of 3-chloropropene in the tower still product is 0.01wt%, and the content of methanol is 19.7wt%; The overhead product contains methanol, 3-chloropropene and allyl methyl ether, the content of allyl methyl ether in the tower overhead product is 0.4wt%, the content of methanol is 40wt%, and the content of 3-chloropropene is 59.6 wt%;

[0118] The first rectification separation is atmospheric rectification, t...

Embodiment 3

[0127] This embodiment provides a method for recovering allyl chloride and methanol from the water layer of the hydrogen peroxide method epichlorohydrin process, the method comprising the following steps:

[0128] (1) the solution to be treated is fed from the lower feed port of the first rectifying tower, separated through the first rectification, the tower still obtains the tower still product, and the tower top obtains the tower top product;

[0129] The content of methanol in the solution to be treated is 20wt%, and the content of 3-chloropropene is 0.6wt%; the content of 3-chloropropene in the tower still product is 0.06wt%, and the content of methanol is 19.8wt%; The overhead product contains methanol, 3-chloropropene and allyl methyl ether, the content of allyl methyl ether in the tower overhead product is 0.6wt%, the content of methanol is 35.0wt%, and the content of 3-chloropropene is 64.4wt%;

[0130] The first rectification separation is atmospheric rectification, ...

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Abstract

The invention provides a method for recovering chloropropene and methanol from a hydrogen peroxide method epoxy chloropropane process water layer. The method comprises the steps of first rectificationseparation, second rectification separation, washing and adsorption, effective separation of methanol and 3-chloropropene can be realized, the production of allyl methyl ether and the entrainment ofthe allyl methyl ether in the final methanol and 3-chloropropene product are reduced, the product quality of the methanol and the 3-chloropropene is improved, the epoxy chloropropane product quality can be improved, the resource and the cost can be saved, and the industrial production is easily achieved.

Description

technical field [0001] The invention relates to the technical field of separation, recovery and utilization, in particular to the technical field of liquid phase separation and recovery, in particular to a method and device for recovering allyl chloride and methanol from the water layer of the hydrogen peroxide method epichlorohydrin process. Background technique [0002] Epichlorohydrin, also known as epichlorohydrin, is a volatile and unstable colorless liquid. It is mainly used in the preparation of glycerin, epoxy resin, and chlorohydrin rubber. It is an important raw material for the production of glycerin and glycidol derivatives, and can be used as an organic solvent. The epoxy resin prepared from it has the characteristics of strong adhesion, resistance to chemical medium corrosion, low shrinkage, good chemical stability, high impact strength and excellent dielectric properties. It is used in coatings, adhesives, reinforcing materials, Industries such as casting mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/80C07C31/04C07C17/383C07C21/067C07D303/08C07D301/12C07C29/74C07C17/38
CPCC07C29/80C07C17/383C07D303/08C07D301/12C07C29/74C07C17/38C07C31/04C07C21/067
Inventor 黄杰军徐林丁克鸿徐志斌徐文轩钱赟胡金良
Owner JIANGSU YANGNONG CHEM GROUP
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