A continuous extraction device for organic solvents

Abstract

This invention relates to the field of organic solvent extraction technology, and more particularly to a continuous organic solvent extraction device, comprising a primary extraction mechanism, a secondary extraction unit, and a liquid communication unit. The primary extraction mechanism is used to initially separate the aqueous phase and the organic phase from the extraction solution. The secondary extraction unit includes an aqueous phase extraction mechanism and an organic solvent extraction mechanism, which are respectively connected to the primary extraction mechanism through output pipes. This invention achieves multi-stage extraction by initially separating the aqueous and organic phases through the primary extraction mechanism, followed by further separation using the aqueous phase extraction mechanism and the organic solvent extraction mechanism, thereby improving extraction efficiency and the purity of the organic solvent. The liquid communication unit connects the two mechanisms, enabling the reprocessing of the aqueous and organic phases, improving material utilization, reducing target substance residue, and forming a coherent system through the coordinated work of each part, promoting continuous and stable operation of the device.

Description

Technical Field

[0001] This utility model relates to the field of organic solvent extraction technology, and in particular to a continuous organic solvent extraction device. Background Technology

[0002] In many fields such as chemical engineering, pharmaceuticals, food, and environmental protection, the separation and purification of substances is of paramount importance. Extraction technology, as a commonly used and efficient separation method, plays an indispensable role. Among them, organic solvent extraction is widely used in separation tasks of various complex systems because it can utilize the difference in solubility of solutes in different solvents to achieve the transfer of target substances from the raw material liquid to the organic solvent phase.

[0003] However, traditional extraction devices separate the solution phases through a reaction, for example, the upper layer is an aqueous phase and the lower layer is an organic solvent. Then, the separated aqueous phase is continuously extracted, and after the extraction is completed, the collected organic solvent is extracted again. The overall operation has poor continuity, which not only leads to poor extraction effect but also low efficiency.

[0004] Therefore, based on the above situation, it is necessary to design an organic solvent continuous extraction device to solve the above problems. Utility Model Content

[0005] This invention provides a continuous organic solvent extraction device to solve the problems in the prior art.

[0006] The technical problem solved by this utility model is achieved by the following technical solution:

[0007] An organic solvent continuous extraction apparatus includes a primary extraction mechanism, a secondary extraction unit, and a liquid communication unit. The primary extraction mechanism is used to initially separate an aqueous phase and an organic phase from the extraction solution. The secondary extraction unit includes an aqueous phase extraction mechanism and an organic solvent extraction mechanism, which are respectively connected to the primary extraction mechanism via output pipes. The aqueous phase extraction mechanism and the organic solvent extraction mechanism are used to receive the aqueous phase and organic phase separated in the primary extraction mechanism and perform further separation. The aqueous phase extraction mechanism and the organic solvent extraction mechanism are connected through the liquid communication unit, which is used to transport the aqueous phase and organic phase extracted in the aqueous phase extraction mechanism and the organic solvent extraction mechanism into the aqueous phase extraction mechanism and the organic solvent extraction mechanism, respectively, for further processing.

[0008] Preferably, a mixing tank for holding the extraction solution and the extraction auxiliary solution is connected between the aqueous phase extraction mechanism and the output pipe, and between the organic solvent extraction mechanism and the output pipe. The mixing tank is equipped with a stirring element.

[0009] Preferably, the stirring component includes a motor and a stirring rod disposed on the output shaft of the motor, a bucket lid is detachably connected to the mixing bucket, the motor is disposed on the bucket lid, and the bucket lid is provided with an inlet for adding extraction auxiliary solution.

[0010] Preferably, the liquid communication unit includes a first connecting pipe and a second connecting pipe connecting the aqueous phase extraction mechanism and the organic solvent extraction mechanism. A first liquid guide pipe is provided between the first connecting pipe and the mixing tank connected to the aqueous phase extraction mechanism, and a second liquid guide pipe is provided between the second connecting pipe and the mixing tank connected to the organic solvent extraction mechanism. A first water pump is provided on both the first liquid guide pipe and the second liquid guide pipe.

[0011] Preferably, it also includes a control component, which includes a liquid level sensor disposed in the primary extraction mechanism, the aqueous phase extraction mechanism and the organic solvent extraction mechanism, and a controller electrically connected to the liquid level sensor. A second water pump is provided on the output pipe, and both the first water pump and the second water pump are electrically connected to the controller.

[0012] Preferably, the output end of the mixing tank is equipped with a valve.

[0013] The beneficial effects of this invention are as follows: the aqueous phase and organic phase are initially separated by the primary extraction mechanism, and then further separated by the aqueous phase extraction mechanism and the organic solvent extraction mechanism, thus achieving multi-stage extraction, improving extraction efficiency and the purity of organic solvents. The liquid communication unit connects the two mechanisms, enabling the reprocessing of the aqueous and organic phases, improving material utilization, reducing target substance residues, and forming a coherent system through the coordinated work of each part, promoting continuous and stable operation of the device. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 Schematic diagram of the three-dimensional structure provided by this utility model Figure 1 ;

[0016] Figure 2 Schematic diagram of the three-dimensional structure provided by this utility model Figure 2 ;

[0017] Figure 3 A cross-sectional structural schematic diagram provided for this utility model;

[0018] Figure 4This is a partial structural schematic diagram of the present invention.

[0019] In the diagram, 1. Primary extraction mechanism; 2. Secondary extraction unit; 21. Aqueous phase extraction mechanism; 22. Organic solvent extraction mechanism; 3. Output pipe; 4. Liquid communication unit; 41. First connecting pipe; 42. Second connecting pipe; 5. Mixing tank; 6. Stirring component; 61. Motor; 62. Stirring rod; 7. Tank lid; 8. Liquid inlet; 9. First liquid guide pipe; 10. Second liquid guide pipe; 11. First water pump; 121. Liquid level sensor; 122. Controller; 13. Second water pump; 14. Valve. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0021] Reference Figures 1-4As shown, an organic solvent continuous extraction device includes a primary extraction mechanism 1. In actual use, a mixing tank 5 can be installed above the primary extraction mechanism 1. The solution to be extracted is first mixed with the auxiliary solution for extraction, and then enters the primary extraction mechanism 1 for stratification, so that the extraction solution initially separates into an aqueous phase and an organic phase. Two output pipes 3 are connected to the bottom of the primary extraction mechanism 1. The output pipes 3 can be equipped with on / off valves. For example, after stratification, the aqueous phase is located on top of the organic phase. Then, the organic phase at the bottom first enters the organic solvent extraction mechanism 22 in the secondary extraction unit 2 through one of the output pipes 3. When the organic phase output is finished, the on / off valve is closed, and then the other on / off valve is opened, so that the aqueous phase at the top enters the water tank extraction mechanism through the other output pipe 3. Then, the aqueous phase and organic phase separated by the primary extraction mechanism 1 are separated again. At this time, the aqueous phase in the aqueous phase extraction mechanism 21 will separate out the residual organic phase, and the organic phase in the organic solvent extraction mechanism 22 will separate out the residual aqueous phase, and so on, continuously separating... This design improves the separation effect and efficiency. Since back-extraction is often required in industrial extraction, to further improve the purity of the extraction, the aqueous phase extraction mechanism 21 and the organic phase extraction mechanism are connected via a liquid communication unit 4. After both the aqueous and organic phases are separated in the aqueous phase extraction mechanism 21 and the organic solvent extraction mechanism 22, the aqueous phase from both mechanisms is fed back into the aqueous phase extraction mechanism 21 for further extraction via the liquid communication unit 4. Similarly, the organic phase from both mechanisms is fed back into the organic solvent extraction mechanism 22 for further extraction, and so on. Output ports can be provided at the bottom of both the aqueous phase extraction mechanism 21 and the organic solvent extraction mechanism 22, and on / off valves can be installed at these ports. After circulation at one end, a certain amount of liquid can be released for testing. When the target concentration is reached, recirculation and purification can be stopped. This not only improves the continuity of extraction but also increases the extraction efficiency and purity of the organic solvent, reducing waste of the organic solvent.

[0022] Reference Figure 3 As shown, furthermore, in order to fully mix the extraction solution and the extraction auxiliary liquid, a mixing tank 5 for holding the extraction solution and the extraction auxiliary liquid is connected between the aqueous phase extraction mechanism 21 and the output pipe 3 and between the organic solvent extraction mechanism 22 and the output pipe 3. The solution to be extracted and the extraction auxiliary liquid are evenly placed into the mixing tank 5. In order to fully mix them, a stirring element 6 is provided in the mixing tank 5. The stirring element 6 makes the two falling into the mixing tank 5 fully mixed. Then, they enter the interior of the aqueous phase extraction mechanism 21 and the organic solvent extraction mechanism 22. At this time, the mixed solution will directly separate the aqueous phase and the organic phase, thereby improving the reaction effect.

[0023] To facilitate thorough mixing of the extraction solution and the extraction auxiliary solution, the stirring component 6 includes a motor 61 and a stirring rod 62 mounted on the output shaft of the motor 61. A bucket lid 7 is detachably connected to the mixing tank 5 via snap-fit, thread, or other means. The motor 61 is mounted on the bucket lid 7, which has a liquid inlet 8. During use, the liquid inlet 8 can be connected to the extraction auxiliary solution. As the extraction solution gradually enters the mixing tank 5, the extraction auxiliary solution also gradually enters the mixing tank 5. Then, the motor 61 is turned on, and the output shaft of the motor 61 drives the stirring rod 62 to rotate, thereby stirring and mixing the extraction solution and the extraction auxiliary solution to improve the separation effect between the aqueous phase and the organic phase.

[0024] Reference Figures 1-4 As shown, further, in order to improve the efficiency of back-extraction, a first connecting pipe 41 and a second connecting pipe 42 are connected between the aqueous phase extraction mechanism 21 and the organic solvent extraction mechanism 22. A first liquid guide pipe 9 is connected between the first connecting pipe 41 and the mixing tank 5 connected to the aqueous phase extraction mechanism 21, and a second liquid guide pipe 10 is connected between the second connecting pipe 42 and the mixing tank 5 connected to the organic solvent extraction mechanism 22. A first water pump 11 is provided on both the first liquid guide pipe 9 and the second liquid guide pipe 10. In use, when the aqueous phase and organic solvent are separated in both the aqueous phase extraction mechanism 21 and the organic solvent extraction mechanism 22, the aqueous phase in the aqueous phase extraction mechanism 21 and the organic solvent extraction mechanism 22 is pumped into the mixing tank 5 on the aqueous phase extraction mechanism 21 by the first water pump 11 on the second liquid guide pipe 10. Then, the first water pump 11 on the first liquid guide pipe 9 pumps the organic solvent in the aqueous phase extraction mechanism 21 and the organic solvent extraction mechanism 22 into the mixing tank 5 on the organic solvent extraction mechanism 22, and then the subsequent back-extraction is carried out continuously.

[0025] Reference Figures 1-3As shown, furthermore, to facilitate the control of the extraction of the aqueous phase and the organic phase, a control component is also included. The control component includes a level sensor 121 disposed in the primary extraction mechanism 1, the aqueous phase extraction mechanism 21, and the organic solvent extraction mechanism 22, and a controller 122 electrically connected to the level sensor 121. A second water pump 13 is provided on the output pipe 3. Both the first water pump 11 and the second water pump 13 are electrically connected to the controller 122. For example, if the aqueous phase is located above the organic phase, when it is necessary to add the aqueous phase or the organic phase from the primary extraction mechanism 1 to the aqueous phase extraction mechanism 21 and the organic solvent extraction mechanism 22, the control component further includes a control component. When the solvent extraction mechanism 22 is in operation, the controller 122 controls the second water pump 13 on one of the output pipes 3 to turn on, so that the organic solvent is input into the organic solvent extraction mechanism 22. After the organic solvent is input, the aqueous phase will gradually decrease, and then the liquid level sensor 121 will transmit a signal to the controller 122. The controller 122 will turn off the second water pump 13 that is currently in operation, and turn on another second water pump 13 to pump the aqueous phase into the aqueous phase extraction mechanism 21. The operating principle of the first water pump 11 is the same as that of the second water pump 13, which further improves the continuity of extraction.

[0026] Reference Figures 1-4 As shown, furthermore, in order to facilitate the control of the mixing time of the mixed solution in the mixing tank 5, a valve 14 is provided at the output end of the mixing tank 5. In order to realize automatic opening and closing, it can be an electric valve 14, a hydraulic valve 14, etc., which can be electrically connected to the controller 122. After the extraction solution and the extraction auxiliary liquid have been mixed for a period of time, the controller 122 can control the opening and closing of the valve 14 to realize the automatic operation of the valve 14.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A continuous organic solvent extraction apparatus, characterized in that, include; Primary extraction unit (1), which is used to initially separate the aqueous phase and the organic phase from the extraction solution; Secondary extraction unit (2), the secondary extraction unit (2) includes an aqueous phase extraction mechanism (21) and an organic solvent extraction mechanism (22) that are respectively connected to the primary extraction mechanism (1) through an output pipe (3). The aqueous phase extraction mechanism (21) and the organic solvent extraction mechanism (22) are used to receive the aqueous phase and organic phase separated in the primary extraction mechanism (1) respectively, and perform further separation. The liquid communication unit (4) connects the aqueous phase extraction mechanism (21) and the organic solvent extraction mechanism (22). The liquid communication unit (4) is used to transport the aqueous phase and organic phase extracted in the aqueous phase extraction mechanism (21) and the organic solvent extraction mechanism (22) into the aqueous phase extraction mechanism (21) and the organic solvent extraction mechanism (22) respectively for further processing.

2. The apparatus according to claim 1, wherein The aqueous extraction mechanism (21) and the output pipe (3) are connected to a mixing tank (5) for holding the extraction solution and the extraction auxiliary solution. The mixing tank (5) is equipped with a stirring element (6).

3. The apparatus according to claim 2, wherein The stirring component (6) includes a motor (61) and a stirring rod (62) on the output shaft of the motor (61). The mixing tank (5) is detachably connected to a lid (7). The motor (61) is located on the lid (7). The lid (7) is provided with an inlet (8) for adding an extraction auxiliary solution.

4. The apparatus according to claim 1, wherein The liquid communication unit (4) includes a first connecting pipe (41) and a second connecting pipe (42) connecting the aqueous phase extraction mechanism (21) and the organic solvent extraction mechanism (22). The first connecting pipe (41) is connected to the mixing tank (5) connected to the aqueous phase extraction mechanism (21) and a first liquid guide pipe (9) is provided. The second connecting pipe (42) is connected to the mixing tank (5) connected to the organic solvent extraction mechanism (22) and a second liquid guide pipe (10) is provided. A first water pump (11) is provided on both the first liquid guide pipe (9) and the second liquid guide pipe (10).

5. The apparatus according to claim 4, wherein It also includes a control component, which includes a liquid level sensor (121) located in the primary extraction mechanism (1), the aqueous phase extraction mechanism (21) and the organic solvent extraction mechanism (22) and a controller (122) electrically connected to the liquid level sensor (121). A second water pump (13) is provided on the output pipe (3). Both the first water pump (11) and the second water pump (13) are electrically connected to the controller (122).

6. The apparatus according to claim 2, wherein The mixing tank (5) is equipped with a valve (14) at its output end.

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