Pretreatment extraction device

Abstract

The utility model discloses a pretreatment extraction device which comprises a conical flask, one side of the inner bottom surface of the conical flask is communicated with a glass tube, a glass stopper rod is arranged at the tail end of an inner cavity of the glass tube, and an anti-separation mechanism is arranged between the glass stopper rod and the glass tube; according to the pretreatment extraction device, the glass tube is arranged on one side of the lower end of the conical flask and is matched with the drainage groove, so that extract liquor on the lower layer of the conical flask can gradually flow out along the drainage groove and the glass tube, the extract liquor on the lower layer cannot upwards flow through the inner wall of the upper layer and cannot be mixed with liquid on the upper layer, and the purity of the extract liquor on the lower layer is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid-liquid extraction, in particular to a pre-treatment extraction device. Background Art

[0002] In chemical analysis and laboratory operations, liquid-liquid extraction technology is often used for sample processing and substance separation. Liquid-liquid extraction refers to the process of adding another solvent to a mixed liquid and using the difference in solubility of different components in the solvent to separate or extract the target substance. For example, benzene is used as a solvent to separate phenol from coal tar, and isopropyl ether is used as a solvent to recover acetic acid from a dilute acetic acid solution.

[0003] At present, common laboratory liquid-liquid extraction containers often adopt a conical flask structure, which has a simple design but has the disadvantage of only having one opening. After the extraction layers are separated, when the lower layer of the extract is taken out, when the conical flask is tilted to separate the liquid, the upper layer of the liquid often flows through the inner wall of the conical flask first, resulting in the residual upper layer of the liquid possibly contaminating the lower layer of the extract, affecting its purity. Therefore, in order to improve the extraction efficiency and purity, it is particularly important to design a new pretreatment extraction device that can effectively prevent the mixing of the upper and lower layer liquids. Utility Model Content

[0004] The utility model aims to solve the problem that the conical flask used for laboratory liquid-liquid extraction in the prior art has a simple structure and only has one opening, and when the lower layer of extraction liquid is taken out, the upper layer of liquid remaining on the inner wall of the conical flask is likely to contaminate the lower layer of extraction liquid, and a pre-treatment extraction device is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A pretreatment extraction device comprises a conical flask, one side of the bottom surface of the conical flask is connected to a glass tube;

[0007] A glass stopper rod is provided at the inner end of the glass tube;

[0008] An anti-separation mechanism is provided between the glass stopper rod and the glass tube.

[0009] Preferably, the anti-detachment mechanism comprises a fixed block, a connecting block and a rectangular ring, the fixed block is fixedly mounted on the upper end of the glass tube, the connecting block is fixedly mounted on one end of the glass stopper rod, and the rectangular ring is rotatably mounted on the top end of the connecting block.

[0010] Preferably, a drainage groove is provided on the inner bottom surface of the conical flask, and the drainage groove and the inner cavity of the glass tube are connected to each other.

[0011] Preferably, a barb groove is provided on an end surface of the fixing block away from the glass tube outlet.

[0012] Preferably, the outer surface of the glass stopper rod is provided with frosted sealing lines.

[0013] Preferably, a scale is provided on the outer wall of the conical flask, and a bottle stopper is provided in the upper inlet of the conical flask.

[0014] Compared with the prior art, the utility model provides a pre-treatment extraction device, which has the following beneficial effects:

[0015] The pretreatment extraction device, by arranging a glass tube on one side of the lower end of the conical flask and cooperating with a drainage groove, can allow the extraction liquid in the lower layer of the conical flask to gradually flow out along the drainage groove and the glass tube. The extraction liquid in the lower layer will not flow upward through the inner wall of the upper layer and will not mix with the liquid in the upper layer, thereby ensuring the purity of the extraction liquid in the lower layer.

[0016] The parts not involved in the device are the same as the prior art or can be implemented by using the prior art. The utility model proposes the conical flask in Example 1 and the cylindrical flask in Example 2. The principles of separation of the lower layer of extract in Example 1 and Example 2 are the same. The conical flask in Example 1 has a large bottom surface and is more suitable for liquid-liquid extraction under flame heating. The conical liquid outlet pipe in Example 2 can gradually gather and discharge the extract in the lower layer, and relatively more extract can be discharged, which is used for liquid-liquid extraction at room temperature or under water bath heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a pre-treatment extraction device proposed by the utility model;

[0018] Figure 2 This is a structural schematic diagram of an anti-separation mechanism in a pre-treatment extraction device proposed by the utility model;

[0019] Figure 3 This is a schematic structural diagram of a pre-treatment extraction device proposed in Example 2 of the utility model.

[0020] In the figure: 1. conical flask; 2. scale one; 3. bottle stopper; 4. drainage groove; 5. glass tube; 6. fixing block; 7. barb groove; 8. glass stopper rod; 9. connecting block; 10. rectangular ring; 11. cylindrical bottle; 12. scale two; 13. vertical support plate; 14. internal thread; 15. upper cover; 16. conical liquid outlet tube; 17. lower cover. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0023] Embodiment 1:

[0024] Reference Figure 1-2 A pretreatment extraction device includes a conical flask 1 for laboratory liquid-liquid extraction experiments. The conical flask 1 is made of transparent glass, and the stratification of the internal liquid can be intuitively observed. The conical flask 1 is thin at the top and thick at the bottom, and is in a cone shape as a whole. A liquid injection port is arranged at the top. A scale 2 for displaying the volume value of the liquid surface in the bottle is fixedly arranged on the outer wall of the conical flask 1. A bottle stopper 3 is arranged in the upper inlet of the conical flask 1. The bottle stopper 3 is specifically made of rubber stopper or glass stopper, which can be selected according to specific extraction requirements.

[0025] In this embodiment, a glass tube 5 is fixedly connected to one side of the inner bottom surface of the conical flask 1. The glass tube 5 and the inner bottom surface of the conical flask 1 are parallel to each other and are installed horizontally. A drainage groove 4 is provided on the inner bottom surface of the conical flask 1. In order to ensure the thickness of the drainage groove 4 at the bottom of the conical flask 1, the drainage groove 4 is specifically formed by thickening both sides of the inner bottom surface of the conical flask 1 to form a linear groove. At the same time, the thickened bottom can also increase the uniformity of heating at the bottom of the conical flask 1. The drainage groove 4 and the inner cavity of the glass tube 5 are connected to each other, and the drainage groove 4 and the lower end of the glass tube 5 are in the same horizontal straight line. The drainage groove 4 can gradually discharge the layered liquid as much as possible;

[0026] It should be added that the glass tube 5 is arranged on the side of the conical flask 1 in order to retain the large supporting bottom surface at the lower end of the conical flask 1, so that it can still be stably placed on the asbestos net used for laboratory heating, that is, the conical flask 1 in this embodiment can be suitable for liquid-liquid extraction requiring flame heating.

[0027] In this embodiment, a glass stopper rod 8 is provided at the inner cavity end of the glass tube 5, and frosted sealing patterns are provided on the outer surface of the glass stopper rod 8 and the inner wall of the outlet of the glass tube 5. The frosted sealing patterns have smooth surfaces with each other, and the sealing effect is better because: first, the sealing surface of the frosted sealing patterns is a plane with very small surface roughness, and they will embed into each other after being subjected to force, and liquid cannot be infiltrated; second, the frosted sealing patterns can divide the gap between the glass tube 5 and the glass stopper rod 8 into several gaps of different widths, and through several narrower gaps, the liquid flowing through is sealed with a water film.

[0028] In this embodiment, an anti-separation mechanism is provided between the glass stopper rod 8 and the glass tube 5. When the conical flask 1 is heated, the air pressure in the conical flask 1 will gradually increase. The anti-separation mechanism is to prevent the glass stopper rod 8 from being squeezed out by the high pressure in the conical flask 1. The anti-separation mechanism includes a fixing block 6, a connecting block 9 and a rectangular ring 10. The fixing block 6 is fixedly mounted on the upper end of the glass tube 5, the connecting block 9 is fixedly mounted on one end of the glass stopper rod 8, and the rectangular ring 10 is rotatably mounted on the top of the connecting block 9. A barb groove 7 is provided on the end surface of the fixing block 6 away from the outlet of the glass tube 5. After the glass stopper rod 8 is inserted into the glass tube 5, the end of the rectangular ring 10 can be rotated to the other side of the fixing block 6 and hung upside down in the barb groove 7.

[0029] In this embodiment, when the pre-treatment extraction device separates the extract in the lower layer of the conical flask 1, the rectangular ring 10 is first rotated away from the barb groove 7, and then the glass stopper rod 8 is pulled out to open the opening of the glass tube 5. After the opening of the glass tube 5 is opened, the extract in the lower layer of the conical flask 1 will gradually flow downward along the drainage groove 4 through the glass tube 5. The extract in the lower layer will not flow upward through the inner wall of the upper layer and will not mix with the upper liquid, thereby ensuring the purity of the extract in the lower layer.

[0030] Embodiment 2:

[0031] Reference Figure 3 A pretreatment extraction device includes a cylindrical bottle 11 for laboratory liquid-liquid extraction experiments. The cylindrical bottle 11 is made of transparent glass, and the stratification of the internal liquid can be intuitively observed. The upper and lower ends are uniformly thick and thin, and the whole is cylindrical. A liquid injection port is provided at the top. A scale 12 is provided on the outer wall of the cylindrical bottle 11. The scale 12 is used to display the liquid content value in the cylindrical bottle 11.

[0032] In this embodiment, a vertical support plate 13 is symmetrically fixedly installed on the top of the cylindrical bottle 11, and it can be stably installed on a corresponding bracket through the vertical support plate 13. The bracket can refer to the test tube rack in the prior art. An internal thread 14 is provided on the inner wall of the liquid injection port at the top of the cylindrical bottle 11, and an upper cover 15 is installed on the inner circle of the internal thread 14 for thread sealing.

[0033] In this embodiment, the lower end of the inner cavity of the cylindrical bottle 11 is fixedly connected to a conical liquid outlet pipe 16, and the cross-section of the conical liquid outlet pipe 16 gradually decreases from top to bottom. The conical liquid outlet pipe 16 is used to gradually gather and discharge the liquid at the lower end of the cylindrical bottle 11. The lower end outlet of the conical liquid outlet pipe 16 is threadedly installed with a lower cover 17. The cylindrical bottle 11 is mainly used to process liquid-liquid extraction at room temperature or that can be heated in a water bath.

[0034] In this embodiment, when the pre-treatment extraction device separates the lower layer of the extract in the cylindrical bottle 11, the lower cover 17 at the lower end of the cylindrical bottle 11 is directly unscrewed. After the opening of the conical liquid outlet pipe 16 is opened, the extract in the lower layer of the cylindrical bottle 11 will gradually gather downward and flow out through the conical liquid outlet pipe 16. The extract in the lower layer will not flow upward through the inner wall of the upper layer and will not mix with the upper liquid, thereby ensuring the purity of the extract in the lower layer.

[0035] In summary, the principles of taking out the lower layer of extract in Example 1 and Example 2 are the same, but the bottles used in Example 1 and Example 2 are different. For different extraction conditions, the conical flask 1 in Example 1 has a larger lower bottom surface, which is more suitable for liquid-liquid extraction under flame heating conditions. However, compared with Example 2, the conical liquid outlet pipe 16 in Example 2 can gradually gather and discharge the extract in the lower layer, and relatively more extract can be discharged. In short, the lower bottom surface of the conical flask 1 is relatively large. In order to ensure the purity of the lower layer of extract, more extract will remain in the conical flask 1.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pretreatment extraction device, comprising a conical flask (1), characterized in that: One side of the inner bottom surface of the conical flask (1) is connected to a glass tube (5); A glass stopper rod (8) is provided at the inner end of the glass tube (5); An anti-separation mechanism is provided between the glass stopper rod (8) and the glass tube (5), the anti-separation mechanism comprising a fixing block (6), a connecting block (9) and a rectangular ring (10), the fixing block (6) being fixedly mounted on the upper end of the glass tube (5), the connecting block (9) being fixedly mounted on one end of the glass stopper rod (8), and the rectangular ring (10) being rotatably mounted on the top end of the connecting block (9).

2. A pre-treatment extraction device according to claim 1, characterized in that: A drainage groove (4) is provided on the inner bottom surface of the conical flask (1), and the drainage groove (4) and the inner cavity of the glass tube (5) are communicated with each other.

3. A pre-treatment extraction device according to claim 1, characterized in that: A barb groove (7) is provided on the end surface of the fixing block (6) on one side away from the outlet of the glass tube (5).

4. A pre-treatment extraction device according to claim 1, characterized in that: The outer surface of the glass stopper rod (8) is provided with frosted sealing patterns.

5. A pre-treatment extraction device according to claim 1, characterized in that: A scale (2) is provided on the outer wall of the conical flask (1), and a bottle stopper (3) is provided in the upper inlet of the conical flask (1).

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