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Process and equipment for separating mixture of cyclohexanone, cyclohexanol and N,N-dimethylacetamide

A technology of dimethylacetamide and cyclohexanol, which is applied in the chemical industry, can solve the problems that the separation and recovery rate of cyclohexanol has not been significantly improved, and has not been involved, so as to save equipment investment and operation difficulty, reduce heat load, and save cost effect

Inactive Publication Date: 2018-09-04
山东亚科环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Patent CN205152116U discloses an energy-saving device for separating cyclohexanone and cyclohexanol in the production process of cyclohexanone, which adopts a two-tower process for separating cyclohexanone and cyclohexanol, and its advantage is that it can be used in a 200,000-ton / year cyclohexanol device It can save the heat load of the steam reboiler of the cyclohexanone tower, the heat load of the cyclohexanol dehydrogenation evaporator, and the condenser load of the cyclohexanol tower, but the recovery rate of cyclohexanol separation has not been significantly improved, and cyclohexanol and N , N-dimethylacetamide separation technology

Method used

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  • Process and equipment for separating mixture of cyclohexanone, cyclohexanol and N,N-dimethylacetamide
  • Process and equipment for separating mixture of cyclohexanone, cyclohexanol and N,N-dimethylacetamide
  • Process and equipment for separating mixture of cyclohexanone, cyclohexanol and N,N-dimethylacetamide

Examples

Experimental program
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Effect test

Embodiment 1

[0054] Separation of cyclohexanone from mixtures such as cyclohexanone, cyclohexanol and N,N-dimethylacetamide;

[0055] Separation of cyclohexanol from mixtures such as cyclohexanol and N,N-dimethylacetamide;

[0056] Add extractant to N,N-dimethylacetamide, cyclohexanol and other mixtures;

[0057] A mixture of N,N-dimethylacetamide and extractant, cyclohexanol and heavies was isolated.

Embodiment 2

[0059] like figure 1 As shown, the embodiment of the present invention provides a process for separating mixtures such as cyclohexanone, cyclohexanol, and N,N-dimethylacetamide, including:

[0060] Step S101 for separating cyclohexanone and light components from mixtures such as cyclohexanol and N,N-dimethylacetamide;

[0061] Mixtures (131) such as cyclohexanone, cyclohexanol, and N,N-dimethylacetamide enter from the upper part of the first rectification column (T131);

[0062] Separation of cyclohexanone, light components, cyclohexanol, N,N-dimethylacetamide and other mixtures in the first rectification tower (T131);

[0063] After the cyclohexanone and light components at the top of the first rectification tower (T131) enter the first condenser (E132), the liquid phase enters the first reflux tank (V132), and the light components are not condensed in the first reflux tank (V132). Part (134) is drawn into the oil and gas recovery system through the first vacuum pump (P134)...

Embodiment 3

[0077] like figure 2 As shown, the embodiment of the present invention provides a device for separating mixtures such as cyclohexanone, cyclohexanol, N,N-dimethylacetamide, etc., including:

[0078] The first rectification column (T131), the first condenser (E132), the first reflux tank (V132), the first reflux pump (P132), the first vacuum pump (P134), the first reboiler (E133), a Tower discharge pump (P133), second rectification column (T132), second condenser (E134), second reflux tank (V136), second reflux pump (P136), second vacuum pump (P137), second Reboiler (E135), second tower discharge pump (P135), the third condenser (E137), centrifugal extractor (P138); wherein,

[0079] The first condenser (E132) is arranged between the top of the first rectifying column (T131) and the first reflux tank (V132);

[0080] The first reflux pump (P132) is arranged between the top of the first reflux tank (V132) and the first rectifying column (T131);

[0081] The first vacuum pump...

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Abstract

The invention provides a process and equipment for separating a mixture of cyclohexanone, cyclohexanol and N,N-dimethylacetamide. The process comprises the following steps of S110, separating cyclohexanone and a light component from the mixture of the cyclohexanone, cyclohexanol and N,N-dimethylacetamide; S210, separating the cyclohexanol from the mixture of the cyclohexanol and N,N-dimethylacetamide; S310, adding an extractant in the mixture of the N,N-dimethylacetamide and cyclohexanol; S410: obtaining the mixture of the N, N-dimethylacetamide, extractant, cyclohexanol and heavy component through separation. The process has the advantages of effectively reducing the number of rectification trays, reducing equipment investment and two-effect parallel rectification processes, reducing theheat load of a second reboiler, and significantly improving the recovery rate of a cyclohexanol product, the extractant is added to remove salt water for effective separation, the equipment investmentand operation difficulty are reduced compared with traditional extraction processes, and cost is reduced compared with conventional extractive distillation processes under the premise of achieving the product recovery rate and purity.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a process and equipment for separating mixtures of cyclohexanone, cyclohexanol and N,N-dimethylacetamide. Background technique [0002] Cyclohexanone is an important chemical raw material and the main intermediate in the manufacture of nylon, caprolactam and adipic acid. Cyclohexanone can also be used as an organic solvent, widely used in various coatings, paints, inks and resin solvents and thinners, as well as solvents for coating photosensitive and magnetic recording materials. At the same time, downstream derivatives can also be produced, such as cyclohexanone-formaldehyde resin, peroxycyclohexanone, o-methyl phenone, anti-aging agent, initiator, cross-linking agent and pharmaceutical and pesticide raw materials. [0003] Cyclohexanol is an excellent organic chemical raw material with medium and high boiling points, mainly used in the production of adip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C49/403C07C45/82C07C35/08C07C29/80C07C233/05C07C231/24
CPCC07C29/80C07C45/82C07C231/24C07C2601/14C07C49/403C07C35/08C07C233/05
Inventor 訾文礼王美丽张志宏王月昶闽庆绍
Owner 山东亚科环保科技有限公司
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