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N-butanol separation and purification device and method for separation and purification by adopting same

A technology of n-butanol and polymethoxydibutyl ether, applied in the field of chemical rectification, can solve the problems of difficult separation of n-butanol mixed solution, low separation purity of n-butanol, etc. Environmental protection pressure, good separation effect

Active Publication Date: 2017-07-21
SICHUAN DAXING ENERGY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a n-butanol separation and purification device and a separation and purification method using the device, which solves the difficulty in separating n-butanol, water and formaldehyde mixed solution, and the low separation purity of n-butanol question

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  • N-butanol separation and purification device and method for separation and purification by adopting same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as figure 1 As shown, the n-butanol separation and purification device includes a first-stage chromatograph 1, a dehydration tower 2, a second-stage chromatograph 3, a rectification tower 4, and a n-butanol storage tank 5 connected in sequence.

[0022] Such as figure 1 As shown, both the primary chromatograph 1 and the secondary chromatograph 3 are provided with overflow plates, and the overflow plate separates the primary chromatograph 1 and the secondary chromatograph 3 into a light phase area and a heavy phase. Area; and in the light phase area, the heavy phase area and the rectification tower 4 are provided with level controllers for measuring the discharge of the separation liquid in the light phase area and the heavy phase area; the separation liquid is in the first chromatograph 1 And the secondary chromatograph 3 is left standing and separated.

[0023] Such as figure 1 As shown, the heavy phase zone of the primary chromatograph 1 and the heavy phase zone of...

Embodiment 2

[0031] The method for separating and purifying n-butanol using the above device includes the following steps:

[0032] (1) Add a mixture of 7% n-butanol, 80% water and 13% formaldehyde to the primary chromatograph and let it stand at 80°C for 0.5h. The components in the light phase of the primary chromatograph are used as The raw materials return to the synthesis system; the components in the heavy phase zone enter the dehydration tower and continue to separate;

[0033] (2) Separate under the condition that the temperature of the top of the dehydration tower is 100℃, the temperature of the bottom of the dehydration tower is 100℃, the reflux ratio is 2, and the pressure is 0.2mPa. The content is controlled at about 100ppm, and the formaldehyde component is stored in the formaldehyde storage tank; the mixed component of n-butanol, water and formaldehyde is obtained from the top of the dehydration tower, and then it enters the secondary chromatograph to continue the separation;

[003...

Embodiment 3

[0036] The method for separating and purifying n-butanol using the above device includes the following steps:

[0037] (1) Add a mixture of 10% n-butanol, 82% water and 8% formaldehyde to the primary chromatograph, stand at 80°C for 0.5h, and use the components in the light phase of the primary chromatograph as The raw materials return to the synthesis system; the components in the heavy phase zone enter the dehydration tower and continue to separate;

[0038] (2) Separate under the conditions that the temperature of the top of the dehydration tower is 85℃, the temperature of the bottom of the dehydration tower is 110℃, the reflux ratio is 2, and the pressure is 0.2mPa, and the formaldehyde component is obtained from the bottom of the dehydration tower. The content is controlled at about 100ppm, and the formaldehyde component is stored in the formaldehyde storage tank; the mixed component of n-butanol, water and formaldehyde is obtained from the top of the dehydration tower, and th...

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Abstract

The invention discloses an n-butanol separation and purification device and a method for separation and purification by adopting the same. The device comprises a primary chromatography device, a dehydrating tower, a secondary chromatography device, a rectifying tower and an n-butanol storage tank which are communicated sequentially. The bottom of the dehydrating tower is connected with a formaldehyde storage tank, and the rectifying tower is communicated with the primary chromatography device. The method for separation and purification comprises a step (1) of adding n-butanol mixed liquid into the primary chromatography device, performing standing separation, and causing ingredients of a heavy phase area of the n-butanol mixed liquid to enter the dehydrating tower; a step (2) of causing ingredients at the bottom of the dehydrating tower to enter the formaldehyde storage tank, and causing ingredients at the top of the dehydrating tower to enter the secondary chromatography device to continue to be separated; a step (3) of causing the ingredients at the top of the dehydrating tower to undergo standing separation in the secondary chromatography device, causing ingredients of a light phase area to enter the rectifying tower, and obtaining rectified n-butanol at the bottom of the rectifying tower. According to the method, a problem that it is difficult to separate mixed solution of n-butanol, water and formaldehyde, the separation purity of n-butanol can further be improved, and the yield of n-butanol is improved.

Description

Technical field [0001] The invention belongs to the technical field of chemical rectification, and specifically relates to a separation and purification device for n-butanol and a separation and purification method using the device. Background technique [0002] Polymethoxydibutyl ether is a high boiling point yellow liquid with high average cetane number (CN) (over 70), high oxygen content (>20%), no aromatics, and almost no sulfur. Its physical properties are similar to diesel. As a diesel quality improver, it does not require any changes to the engine of the vehicle in use. It can also increase the diesel cetane number, increase the oxygen content of the oil, and greatly reduce the CO pollutants in the exhaust. , THC, smoke, and particulate matter (PM2.5, PM5, PM10) emissions, which can play a positive role in the environmental purification and emission reduction of diesel vehicle exhaust to a large extent, thereby improving environmental quality. It is currently recognized...

Claims

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Application Information

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IPC IPC(8): C07C29/76C07C29/80C07C31/12
CPCC07C29/76C07C29/80C07C31/12
Inventor 张光辉苏召飞安高军王国祥吴映忠熊春华蒋淑敏鲁长波龙素安王旭东
Owner SICHUAN DAXING ENERGY
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