Continuous separation and purification equipment for production of N-ethylaniline

Abstract

The utility model provides continuous separation and purification equipment for producing N-ethylaniline. The continuous separation and purification equipment comprises a primary separation mechanism, a secondary separation mechanism and an ultimate purification mechanism, the primary separation mechanism, the secondary separation mechanism and the ultimate purification mechanism are communicated in sequence; the primary separation mechanism comprises a primary separation barrel, and a feeding pipe and a waste discharging pipe are arranged at the bottom of the outer surface of the primary separation barrel and communicate with the interior of the primary separation barrel. During use, distilled water and N-ethylaniline are injected into the primary separation barrel through the feeding pipe arranged on the primary separation barrel, water-soluble substances in the N-ethylaniline are separated through water, and the N-ethylaniline floats above the water, is filtered through the isolation plate and enters the secondary separation barrel; the method comprises the following steps: dissolving N-ethylaniline through ethanol in a secondary separation barrel, separating substances insoluble in ethanol, heating to evaporate ethanol and water to obtain high-concentration N-ethylaniline, and separating and purifying without conversion equipment.

Description

Technical Field

[0001] This utility model relates to the technical field of N-ethylaniline purification equipment, and in particular to a continuous separation and purification equipment for the production of N-ethylaniline. Background Technology

[0002] N-Ethylaniline is an organic compound with the chemical formula C8H11N. It is a yellowish-brown transparent oily liquid that is insoluble in water but miscible with a variety of organic solvents such as ethanol and ether. It is mainly used in organic synthesis.

[0003] During the production of N-ethylaniline, the semi-finished product contains a large number of impurities due to factors such as the purity of the raw materials. To improve the purity of the finished N-ethylaniline product, it is necessary to purify it during production.

[0004] N-ethylaniline typically contains both water-soluble and water-insoluble impurities, requiring multiple separations for successful extraction. Existing equipment also employs this method of staged purification, resulting in low purification efficiency.

[0005] Therefore, this application proposes a continuous separation and purification device for the production of N-ethylaniline to improve purification efficiency. Utility Model Content

[0006] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a continuous separation and purification device for the production of N-ethylaniline, so as to solve the problem of low purification efficiency in the prior art.

[0007] To achieve the above and other related objectives, this utility model provides a continuous separation and purification device for the production of N-ethylaniline, comprising: a primary separation unit, a secondary separation unit, and a final purification unit;

[0008] The primary separation mechanism, secondary separation mechanism, and final purification mechanism are connected in sequence.

[0009] The primary separation mechanism includes a primary separation tank. The bottom of the outer surface of the primary separation tank is provided with a feed pipe and a waste discharge pipe, which are connected to the inside of the primary separation tank. A partition plate is provided in the middle section inside the primary separation tank, and filter holes are provided on the partition plate.

[0010] The secondary separation mechanism includes a secondary separation tank, a separation screen is provided in the middle section inside the secondary separation tank, an ethanol injection pipe is provided at the lower end of the outer surface of the secondary separation tank, and a primary connecting pipe is also provided on the secondary separation tank to connect with the upper part of the primary separation tank.

[0011] The final purification mechanism includes a distillation tank, which is connected to a secondary separation tank by a secondary connecting pipe. A heating element is provided at the bottom of the distillation tank, a waste gas emission pipe is provided at the top of the distillation tank, and a discharge pipe is provided on the side of the distillation tank.

[0012] Preferably, the filter holes are arranged in a ring in the middle of the isolation plate, and a gap is left between the outer ring of the filter holes and the outer surface of the isolation plate. A dialysis element is provided on the isolation plate, and the dialysis element completely covers the filter holes.

[0013] Preferably, a gap is left between the outer surface of the dialysis element and the inner wall of the primary separation tank.

[0014] Preferably, the feed pipe is a three-way pipe, with one port connected to a water supply device and the other port connected to N-ethylaniline raw material.

[0015] Preferably, the end of the primary connecting pipe passes through the separation net, and the end of the primary connecting pipe extends to the inner bottom of the secondary separation tank.

[0016] Preferably, the separating mesh is a soft filter mesh or a membrane.

[0017] Preferably, the connection point between the secondary connecting pipe and the secondary separation tank is located above the separation net.

[0018] Preferably, the top of the heating element is provided with a ceramic protective plate.

[0019] Preferably, the exhaust pipe is an inverted U-shaped connecting pipe, and the tail end of the exhaust pipe is connected to a water tank.

[0020] As described above, the continuous separation and purification equipment for the production of N-ethylaniline according to this utility model has the following beneficial effects:

[0021] 1. This utility model introduces a primary separation tank by installing a feed pipe to inject distilled water and N-ethylaniline into the tank. The water separates the water-soluble components of N-ethylaniline, and the N-ethylaniline floats on top of the water and passes through a separator to enter the secondary separation tank. In the secondary separation tank, N-ethylaniline is dissolved in ethanol, separating the insoluble components. Finally, the ethanol and water are evaporated by heating elements in the distillation tank to obtain a high concentration of N-ethylaniline. This separation and purification process eliminates the need for conversion equipment, thus improving the efficiency of separation and purification.

[0022] 2. This utility model improves separation efficiency by setting a dialysis element above the isolation plate to cover the filter holes. Under water pressure, N-ethylaniline permeates through the dialysis element to the upper layer of the primary separation tank, further separating large particulate impurities.

[0023] 3. By connecting the tail end of the exhaust pipe to a water tank, the ethanol dissolves directly in the water during ethanol evaporation, which reduces the amount of ethanol volatilized into the air and avoids pollution and harm.

[0024] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value. Attached Figure Description

[0025] Figure 1 The diagram shown is a structural schematic of this utility model.

[0026] Figure 2 The diagram shown is a rear view of the structure of this utility model.

[0027] Figure 3 The diagram shown is a cross-sectional view of the primary separation mechanism of this utility model.

[0028] Figure 4 The diagram shown is a cross-sectional view of the secondary separation mechanism of this utility model.

[0029] Figure 5 The diagram shown is a cross-sectional view of the ultimate purification mechanism of this utility model.

[0030] Component designation explanation:

[0031] 1. Primary separation mechanism; 101. Primary separation tank; 102. Feed pipe; 103. Waste discharge pipe; 104. Isolation plate; 105. Filter hole; 106. Dialysis unit;

[0032] 2. Secondary separation mechanism; 201. Secondary separation tank; 202. Primary connecting pipe; 203. Ethanol injection pipe; 204. Separation screen;

[0033] 3. Final purification mechanism; 301. Distillation tank; 302. Secondary connecting pipe; 303. Heating element; 304. Exhaust gas emission pipe; 305. Discharge pipe. Detailed Implementation

[0034] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0035] Please see Figures 1 to 5It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0036] like Figures 1-5 As shown, this utility model provides a continuous separation and purification device for the production of N-ethylaniline, including a primary separation unit 1, a secondary separation unit 2, and a final purification unit 3. The primary separation unit 1, secondary separation unit 2, and final purification unit 3 are connected sequentially. The primary separation unit 1 is used to separate large particles and water-soluble impurities from N-ethylaniline. The secondary separation unit 2 is used to separate impurities insoluble in ethanol or diethyl ether from N-ethylaniline. The final purification unit 3 is used to purify the N-ethylaniline after multiple separations by removing water, ethanol or diethyl ether, and impurities with boiling points lower than N-ethylaniline through evaporation, thereby obtaining high-purity N-ethylaniline.

[0037] Specifically, the primary separation mechanism 1 includes a primary separation tank 101. A feed pipe 102 and a waste discharge pipe 103 are respectively installed at the bottom of the outer surface of the primary separation tank 101, communicating with the interior of the tank. Both the feed pipe 102 and the waste discharge pipe 103 are equipped with valves. During separation and purification, water and N-ethylaniline are injected into the interior of the primary separation tank 101 through the feed pipe 102. The water dissolves the water-soluble substances in N-ethylaniline. Since N-ethylaniline has a lower density than water, it floats on the water, achieving separation. The waste discharge pipe 103 is used to discharge saturated water, ensuring that the water can continuously dissolve impurities. A partition plate 104 is installed in the middle section inside the primary separation tank 101, and filter holes 105 are provided on the partition plate 104. After the water level inside the primary separation tank 101 is level with the bottom of the isolation plate 104, N-ethylaniline is continuously injected into the primary separation tank 101 from a distance. Under pressure, the N-ethylaniline will pass through the filter hole 105 and enter the upper layer of the primary separation tank 101, thus achieving separation.

[0038] The secondary separation unit 2 includes a secondary separation tank 201. Ethanol is continuously injected into the interior of the secondary separation tank 201 through an ethanol injection pipe 203 located at the lower end of the outer surface of the secondary separation tank 201. A primary connecting pipe 202 is also provided on the secondary separation tank 201, connecting it to the upper part of the primary separation tank 101. N-ethylaniline separated in the primary separation tank 101 enters the interior of the secondary separation tank 201 through the primary connecting pipe 202 and dissolves in ethanol. A separation screen 204 is provided in the middle section of the interior of the secondary separation tank 201. Impurities insoluble in ethanol are blocked by the separation screen 204 and precipitate at the bottom of the secondary separation tank 201, while the continuous injection of N-ethylaniline and ethanol causes N-ethylaniline to overflow the separation screen 204.

[0039] The final purification unit 3 includes a distillation tank 301, which is connected to a secondary separation tank 201 via a secondary connecting pipe 302. N-ethylaniline that has passed through the separation mesh 204 enters the interior of the distillation tank 301 through the secondary connecting pipe 302. A heating element 303 is installed at the bottom of the distillation tank 301, heating the liquid in the tank at approximately 150 degrees Celsius. This evaporates the water and ethanol in the N-ethylaniline, separating them from the N-ethylaniline. A waste gas exhaust pipe 304 is installed at the top of the distillation tank 301, through which the evaporated water and ethanol are discharged. High-purity N-ethylaniline remains in the distillation tank 301. A discharge pipe 305 is also installed on the side of the distillation tank 301 to discharge the final product, N-ethylaniline.

[0040] like Figure 3 As shown, in some embodiments, the filter holes 105 of this invention are arranged in a ring in the middle of the isolation plate 104. A gap is left between the outer ring of the filter holes 105 and the outer surface of the isolation plate 104. A dialysis element 106 is provided on the isolation plate 104, and the dialysis element 106 completely covers the filter holes 105.

[0041] Through the above technical solution, the N-ethylaniline separated by the initial filtration can only enter the interior of the dialysis unit 106 through the filter hole 105. As the N-ethylaniline is continuously injected, the pressure increases, causing it to be dialyzed out from the interior of the dialysis unit 106, thus separating smaller impurities.

[0042] like Figure 3 As shown, in some embodiments, a gap is left between the outer surface of the dialysis element 106 and the inner wall of the primary separation tank 101. The dialyzed N-ethylaniline will temporarily reside in the gap between the outer surface of the dialysis element 106 and the inner wall of the primary separation tank 101. Due to the obstruction of the isolation plate 104 and the dialysis element 106, it is isolated from the water at the bottom of the primary separation tank 101, thereby improving the separation effect.

[0043] like Figure 1 and Figure 3 As shown, in some embodiments, the feed pipe 102 of this invention is a three-way pipe, with one port connected to a water supply device and the other port connected to the N-ethylaniline raw material. During the initial filtration and separation of N-ethylaniline, water and N-ethylaniline can be injected simultaneously through the feed pipe 102, improving operational efficiency. When N-ethylaniline is subsequently injected, it will float from the bottom of the water, increasing the contact area between N-ethylaniline and water. Because N-ethylaniline floats on the water surface, when the water becomes saturated, water can be drained through the waste discharge pipe 103, and new water can be added without interrupting the input of N-ethylaniline.

[0044] like Figure 4 As shown, in some embodiments, the end of the primary connecting pipe 202 of this invention penetrates the separation mesh 204, and the end of the primary connecting pipe 202 extends to the inner bottom of the secondary separation tank 201. When N-ethylaniline enters the secondary separation tank 201 from the primary separation tank 101, it will come into contact with ethanol from the bottom and dissolve, improving the dissolution efficiency. The liquid level will then continuously rise and overflow the separation mesh 204, achieving the separation of impurities. The separation mesh 204 is a soft filter or membrane. When N-ethylaniline is injected, the separation mesh 204 will vibrate, thereby reducing impurity adhesion. Furthermore, the pore size of the separation mesh 204 is smaller than the pore size of the dialysis element 106, for further isolation of impurities.

[0045] like Figure 4 As shown, in some embodiments, the connection between the secondary connecting pipe 302 and the secondary separation tank 201 is located above the separation mesh 204. The N-ethylaniline liquid passing through the separation mesh 204 enters the interior of the distillation tank 301 through the secondary connecting pipe 302 for final separation and purification.

[0046] like Figure 5 As shown, in some embodiments, a ceramic protective plate is provided on the top of the heating element 303 of this invention. This plate is used to isolate the heating element 303 from the liquid, preventing N-ethylaniline from corroding the heating element 303 and thus reducing its service life.

[0047] like Figure 1 , Figure 3 and Figure 4 As shown, in some embodiments, the exhaust pipe 304 of this invention is an inverted U-shaped connecting pipe. When steam generated from heating water is discharged through the exhaust pipe 304, the inverted U-shaped connecting pipe can reduce the backflow of condensate caused by the steam contacting the inside of the exhaust pipe 304. The tail end of the exhaust pipe 304 is connected to a water tank to prevent steam from being directly released into the air, thus avoiding environmental pollution and personal injury. This is especially true when diethyl ether is used as a solvent for N-ethylaniline.

[0048] In summary, the continuous separation and purification equipment for N-ethylaniline production of this utility model injects distilled water and N-ethylaniline into the primary separation tank 101 through a feed pipe 102. The water separates the water-soluble substances in N-ethylaniline, and the N-ethylaniline floats on the water and is filtered through the isolation plate 104 into the secondary separation tank 201. Then, the N-ethylaniline is dissolved in ethanol in the secondary separation tank 201, and the insoluble substances are separated. Finally, the ethanol and water are heated and evaporated by the heating element 303 in the distillation tank 301 to obtain high-concentration N-ethylaniline. The separation and purification process does not require conversion equipment, thus improving the efficiency of separation and purification.

[0049] This invention improves separation efficiency by providing a dialysis element 106 covering the filter holes 105 above the isolation plate 104. Under water pressure, N-ethylaniline permeates through the dialysis element 106 to the upper layer of the primary separation tank 101, further separating large particulate impurities.

[0050] This invention connects the tail end of the exhaust pipe 304 to a water tank, so that when ethanol evaporates, the ethanol dissolves directly in the water, which reduces the amount of ethanol that evaporates into the air and avoids pollution and harm.

[0051] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0052] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A continuous separation and purification apparatus for producing N-ethylaniline, characterized by comprising: The utility model relates to a kind of ethanol production device, including: Primary separation mechanism (1), secondary separation mechanism (2) and final purification mechanism (3); The primary separation mechanism (1), secondary separation mechanism (2) and final purification mechanism (3) are sequentially communicated; The primary separation mechanism (1) includes primary separation barrel (101), the bottom of the outer surface of primary separation barrel (101) is respectively provided with feed pipe (102) and waste discharge pipe (103) and the inside of primary separation barrel (101) is communicated, the middle section of the inside of primary separation barrel (101) is provided with isolation plate (104), and the isolation plate (104) is provided with filter hole (105); The secondary separation mechanism (2) includes secondary separation barrel (201), and the middle section of the inside of secondary separation barrel (201) is provided with separation net (204), and the lower end of the outer surface of secondary separation barrel (201) is provided with ethanol injection pipe (203), and secondary separation barrel (201) is further provided with primary communication pipe (202) and the upper portion of primary separation barrel (101) is communicated; The final purification mechanism (3) includes distillation barrel (301), and the distillation barrel (301) is provided with secondary communication pipe (302) and is communicated with secondary separation barrel (201), and the inner bottom of the distillation barrel (301) is provided with heating part (303), and the top of the distillation barrel (301) is provided with waste gas discharge pipe (304), and the side of the distillation barrel (301) is further provided with discharge pipe (305).

2. The continuous separation and purification apparatus for producing N-ethylaniline according to claim 1, characterized by: The filter hole (105) is arranged in the middle annular distribution of the isolation plate (104), and a gap is left between the outer ring of the filter hole (105) and the outer surface of the isolation plate (104), and the isolation plate (104) is provided with dialysis part (106), and the dialysis part (106) completely covers the filter hole (105).

3. The continuous separation and purification apparatus for producing N-ethylaniline according to claim 2, characterized by: A gap is left between the outer surface of the dialysis part (106) and the inner wall of the primary separation barrel (101).

4. The continuous separation and purification apparatus for producing N-ethylaniline according to claim 1, characterized by: The feed pipe (102) is a tee pipe, one of the pipe openings of the feed pipe (102) is connected with water supply equipment, and the other pipe opening is connected with N-ethylaniline raw material.

5. The continuous separation and purification apparatus for producing N-ethylaniline according to claim 1, characterized by: The end of the primary communication pipe (202) penetrates the separation net (204), and the end of the primary communication pipe (202) extends to the inner bottom of the secondary separation barrel (201).

6. The continuous separation and purification apparatus for producing N-ethylaniline according to claim 5, characterized by: The separation net (204) is a soft filter screen or membrane.

7. The continuous separation and purification apparatus for producing N-ethylaniline according to claim 1, characterized by: The connection of the secondary communication pipe (302) and the secondary separation barrel (201) is located above the separation net (204).

8. The continuous separation and purification apparatus for producing N-ethylaniline according to claim 1, characterized by: The top of the heating part (303) is provided with ceramic guard plate.

9. The continuous separation and purification apparatus for producing N-ethylaniline according to claim 1, characterized by: The waste gas discharge pipe (304) is a reverse U-shaped communication pipe, and the tail of the waste gas discharge pipe (304) is connected to a water tank.

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