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Separation process of higher ketone, water and carbon dioxide mixture

A technology for carbon dioxide and mixtures, which is applied in the separation/purification of carbonyl compounds, the preparation of organic compounds, and the preparation of carbon-based compounds. It can solve the problems of no research and patent reports on the separation of system mixtures, and it is difficult to achieve high-purity separation. The degree of equipment integration, the reduction of equipment investment costs, and the effect of low equipment investment costs

Inactive Publication Date: 2019-04-12
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] From the existing literature, there is almost no relevant research and patent reports on the separation of the mixture of the system
At the same time, since 2-pentanone and water, and 4-heptanone and water form azeotropes with the lowest boiling point respectively, it is difficult to achieve high-purity separation by ordinary rectification.

Method used

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  • Separation process of higher ketone, water and carbon dioxide mixture
  • Separation process of higher ketone, water and carbon dioxide mixture
  • Separation process of higher ketone, water and carbon dioxide mixture

Examples

Experimental program
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specific Embodiment 1

[0051] In specific embodiment 1, technique of the present invention comprises following configuration and step:

[0052] The partition tower is to add a partition parallel to the axial direction of the shell inside the ordinary rectification tower, and the shell is divided into the left half of the partition tower 9 and the right half of the partition tower 10; the bottom of the partition directly reaches the lower head of the casing , the top of the partition can directly reach the upper head, and some space can also be reserved on the top; the lower part of the partition and the edges on both sides are sealed with the shell; the left half of the next tower at the bottom 9 and the right half of the next tower The side 10 is equipped with a reboiler 3 and a reboiler 5 respectively, which are used to provide heat for the reboilers of the tower kettles on both sides of the tower; the top of the next wall tower is equipped with a condenser 2 and a vapor-liquid-liquid separator 4; ...

specific Embodiment 2

[0075] In specific embodiment 2, technique of the present invention comprises following configuration and step:

[0076] The partition tower is to add a partition parallel to the axial direction of the shell inside the ordinary rectification tower, and the shell is divided into the left half of the partition tower 9 and the right half of the partition tower 10; the bottom of the partition directly reaches the lower head of the casing , the top of the partition can directly reach the upper head, and some space can also be reserved on the top; the lower part of the partition and the edges on both sides are sealed with the shell; the left half of the next tower at the bottom 9 and the right half of the next tower The side 10 is equipped with a reboiler 3 and a reboiler 5 respectively, which are used to provide heat for the reboilers of the tower kettles on both sides of the tower; the top of the next wall tower is equipped with a condenser 2 and a vapor-liquid-liquid separator 4; ...

specific Embodiment 3

[0096] In specific embodiment 3, technique of the present invention comprises following configuration and step:

[0097] The partition tower is to add a partition parallel to the axial direction of the shell inside the ordinary rectification tower, and the shell is divided into the left half of the partition tower 9 and the right half of the partition tower 10; the bottom of the partition directly reaches the lower head of the casing , the top of the partition can directly reach the upper head, and some space can also be reserved on the top; the lower part of the partition and the edges on both sides are sealed with the shell; the left half of the next tower at the bottom 9 and the right half of the next tower The side 10 is equipped with a reboiler 3 and a reboiler 5 respectively, which are used to provide heat for the reboilers of the tower kettles on both sides of the tower; the top of the next wall tower is equipped with a condenser 2 and a vapor-liquid-liquid separator 4; ...

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Abstract

The invention relates to a separation process of a higher ketone, water and carbon dioxide mixture. The process includes: letting to-be-separated higher ketone, water and carbon dioxide raw materialsenter a dividing wall column left half side (9) from a to-be-separated raw material inlet (15) for vapor-liquid separation, making the gas phase come out of a gas phase outlet (11) of the dividing wall column and enter a condenser (2), enabling the obtained condensate liquid to enter a vapor-liquid-liquid separator (4), conducting standing for 10-30min for full vapor-liquid-liquid balance, then performing separation to obtain a carbon dioxide-rich vapor phase, a ketone-rich phase and a water-rich phase, letting the ketone-rich phase flow back to the dividing wall column left half side (9) , making the water-rich phase flow back to a dividing wall column right half side (10), extracting the obtained carbon dioxide-rich vapor phase for exhausting, acquiring wastewater with trace ketone fromthe column bottom of the dividing wall column right half side (10), and acquiring a higher ketone product from the dividing wall column left half side (9). The process provided by the invention has the advantages of good separation effect, and substantial saving of equipment investment cost and installation space.

Description

technical field [0001] The invention relates to a process for separating the mixture of higher ketones, water and carbon dioxide. Background technique [0002] 2-Pentanone, also known as methyl propyl ketone, is a colorless liquid with the smell of wine and acetone. It is slightly soluble in water and miscible with ethanol and ether. It is mainly used as a solvent, extraction agent, and organic synthesis. And pharmaceutical intermediates, this product is also an excellent dewaxing agent for lubricating oil, and also used as a solvent for nitro spray paint and synthetic resin paint. 4-Heptanone, also known as methyl amyl ketone, has a strong ethereal and fruity aroma, such as cheese, sweetness, and jackfruit. It is a colorless liquid, insoluble in water, soluble in ethanol and ether, and its Natural products exist in apple juice, papaya, pears, baked potatoes, bread, coffee and peanuts. Therefore, 4-heptanone is often used as food flavoring, for the preparation of flavors o...

Claims

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Application Information

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IPC IPC(8): C07C45/78C07C45/82C07C49/04B01D3/14
CPCB01D3/141C07C45/78C07C45/783C07C45/82C07C49/04
Inventor 李德宝夏铭贾丽涛侯博肖勇鲁怀乾
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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