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N-butanol separation and purification device and separation and purification method using the device
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A technology of n-butanol and static separation, applied in the field of chemical rectification, can solve the problems of low separation purity of n-butanol, difficult separation of n-butanol mixed solution, etc. low effect
Active Publication Date: 2020-09-29
SICHUAN DAXING ENERGY CO LTD +2
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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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Embodiment 1
[0021] like figure 1 As shown, the n-butanol separation and purification device includes a primary chromatography 1, a dehydration tower 2, a secondary chromatography 3, a rectification tower 4 and a n-butanol storage tank 5 connected in sequence.
[0022] like figure 1 As shown, the primary chromatography 1 and the secondary chromatography 3 are provided with an overflow plate, and the overflow plate separates the primary chromatography 1 and the secondary chromatography 3 into a light phase area and a heavy phase area; and in light phase area, heavy phase area and rectifying column 4, are all provided with the liquid level controller that is used to measure separation liquid discharge in light phase area and heavy phase area; and static separation in the secondary chromatography device 3.
[0023] like figure 1 As shown, the first-level chromatography 1 heavy phase area and the second-level chromatography 3 heavy-phase area are all connected with the dehydration tower 2; ...
Embodiment 2
[0031] Adopt the method for above-mentioned device separation and purification n-butanol, comprise the following steps:
[0032] (1) Add the mixed solution of n-butanol 7%, water 80% and formaldehyde 13% in the primary chromatograph, stand and separate at 80°C for 0.5h, and the components in the light phase region of the primary chromatograph are used as The raw material returns to the synthesis system; the components in the heavy phase area enter the dehydration tower and continue to be separated;
[0033] (2) Separation under the conditions that the temperature at the top of the dehydration tower is 100°C, the temperature at the bottom of the dehydration tower is 100°C, the reflux ratio is 2, and the pressure is 0.2mPa. The formaldehyde component is obtained at the bottom of the dehydration tower, of which n-butanol 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...
Embodiment 3
[0036] Adopt the method for above-mentioned device separation and purification n-butanol, comprise the following steps:
[0037] (1) Add the mixed solution of 10% n-butanol, 82% water and 8% formaldehyde into the primary chromatograph, stand and separate at 80°C for 0.5h, and the components in the light phase region of the primary chromatograph are used as The raw material returns to the synthesis system; the components in the heavy phase area enter the dehydration tower and continue to be separated;
[0038] (2) Separation under the conditions that the temperature at the top of the dehydration tower is 85°C, the temperature of the bottom of the dehydration tower is 110°C, the reflux ratio is 2, and the pressure is 0.2mPa. The formaldehyde component is obtained at the bottom of the dehydration tower, of which n-butanol 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 an...
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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 distillation, and in particular relates to a n-butanol separation and purification device and a separation and purification method using the device. Background technique [0002] Polymethoxydibutyl ether is a yellow liquid with high boiling point, high average cetane number (CN) (above 70), high oxygen content (>20%), no aromatics, almost no sulfur. Its physical properties are similar to those of diesel. As a diesel quality improver, it does not need to make any changes to the engine of the vehicle in use. It can also increase the cetane number of diesel, increase the oxygen content of oil, and greatly reduce CO pollutants in exhaust gas. , THC, smoke, and particulate matter (PM2.5, PM5, PM10) emissions can play a positive role in the environmental purification and emission reduction of diesel vehicle exhaust to a greater extent, thereby improving environmental quality. It is currently recogni...
Claims
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Application Information
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