High-purity n-hexane efficient purification device based on novel filtering membrane technology

Abstract

The utility model relates to a novel filter membrane technology-based high-efficiency purification device for high-purity n-hexane, which comprises an extraction tank and a rotary evaporator, and is technically characterized in that the extraction tank comprises an upper tank body, a middle transition bin and a lower tank body, and a plurality of blanking hoppers are vertically arranged in the middle transition bin; avoiding holes corresponding to the discharging hopper are formed in the middle transition bin and the partition plate of the upper tank body, hollowed-out supporting plates are fixed to the avoiding holes, lipophilic filtering membranes are laid on the upper surfaces of the hollowed-out supporting plates, an extending vertical pipe is arranged at the lower end of the discharging hopper, and through holes corresponding to the extending vertical pipe are formed in the middle transition bin and the partition plate of the lower tank body; a heating medium splitter plate is arranged in the lower tank body, a splitter vertical pipe corresponding to the extension vertical pipe is arranged on the top face of the heating medium splitter plate, the splitter vertical pipe is inserted into the extension vertical pipe, an inclined through pipe is arranged at the upper end of the splitter vertical pipe, the outer wall of the middle transition bin is sleeved with a collector ring communicated with the inclined through pipe, and a heating medium outlet is further formed in the collector ring. The device obviously improves the purification efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of n-hexane purification equipment, specifically to a high-purity n-hexane high-efficiency purification device based on a novel filtration membrane technology. Background Technology

[0002] n-Hexane is an organic compound belonging to the straight-chain saturated aliphatic hydrocarbons. It is a colorless liquid, insoluble in water, but soluble in most organic solvents such as ethanol, ether, acetone, and chloroform. It is mainly used as a solvent, a reference substance for chromatographic analysis, a paint thinner, and a medium for polymerization reactions. It can also be used in organic synthesis.

[0003] Currently, hexane can be extracted using liquid-liquid extraction, which utilizes the different solubilities of its components in a solvent to achieve separation or extraction. CN 221637392 U discloses a separation and purification system for hexane, which includes a continuous extraction device and a rotary evaporator. The continuous extraction device includes an extraction mechanism and a shaking mechanism, with the shaking mechanism fixedly connected to the extraction mechanism. The extraction mechanism is connected to the rotary evaporator via a detachable hose. By connecting the continuous extraction device to the rotary evaporator, the residual extractant in the extraction phase can be further purified and separated, thereby improving the purity of hexane. However, the following problem still exists: the outside of the collection bottle of the extraction mechanism in the continuous extraction device is heated, and then the heat is conducted to the inside, causing the extractant to evaporate. The low thermal conductivity limits the purification efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a high-purity n-hexane high-efficiency purification device based on a novel filtration membrane technology that has a reasonable structure and reliable operation, thereby significantly improving purification efficiency and solving the above-mentioned problems.

[0005] The technical solution of this utility model is:

[0006] A high-purity n-hexane high-efficiency purification device based on a novel filtration membrane technology includes an extraction tank and a rotary evaporator. The key technical features are: the extraction tank comprises an upper tank, an intermediate transition chamber, and a lower tank; the intermediate transition chamber contains multiple hoppers; the partition between the intermediate transition chamber and the upper tank has clearance holes corresponding to each hopper, and perforated support plates are fixed at the clearance holes; the upper surface of each perforated support plate is covered with a lipophilic filter membrane; the lower end of each hopper is provided with an extension riser; the partition between the intermediate transition chamber and the lower tank has through holes corresponding to each extension riser; the lower tank contains a heating medium distribution plate, and the top surface of the heating medium distribution plate has a connection to the extension riser... Each pipe has a corresponding branch riser, which is inserted into the corresponding extension riser and has an inclined pipe at its upper end. The other end of the inclined pipe passes through the side wall of the hopper and the intermediate transition chamber. A manifold ring connected to each inclined pipe is fitted on the outer wall of the intermediate transition chamber. The manifold ring is also provided with a heating medium outlet. A heating medium inlet connected to a heating medium distribution plate is provided on the outer wall of the lower tank. Multiple vent pipes connected to the lower tank are provided on the partition between the intermediate transition chamber and the lower tank. An external guide pipe is provided on the outer wall of the intermediate transition chamber. A condenser is fixed at the top of the extraction tank. The inlet of the condenser is connected to the other end of the external guide pipe, and the outlet of the condenser is connected to the top of the upper tank.

[0007] The above-mentioned high-purity n-hexane high-efficiency purification device based on novel filtration membrane technology has an upper stirring motor fixed at the top of the extraction tank, an upper stirring paddle connected to the output end of the upper stirring motor in the upper tank body, and a feed inlet communicating with the upper tank body on the top surface of the extraction tank.

[0008] The above-mentioned high-purity n-hexane high-efficiency purification device based on novel filtration membrane technology has a cone-shaped bottom in the lower tank and a lower stirring motor fixed at the lower end. The lower part of the lower tank has a lower stirring paddle connected to the output end of the lower stirring motor. The lower side wall of the bottom of the lower tank is provided with a discharge port, which is connected to a rotary evaporator via a hose.

[0009] The above-mentioned high-purity n-hexane high-efficiency purification device based on novel filtration membrane technology has five feeding hoppers, one of which is located in the center of the intermediate transition chamber, and the other four feeding hoppers are evenly arranged around the central feeding hopper. The end of the inclined pipe at the upper end of the diversion riser passes through the side wall of the feeding hopper and then connects with the adjacent diversion riser.

[0010] The aforementioned high-purity n-hexane high-efficiency purification device based on novel filtration membrane technology has multiple longitudinal clearance channels on the heating medium distribution plate, which does not affect the solvent falling to the bottom of the lower tank.

[0011] The beneficial effects of this utility model are:

[0012] The heating medium distribution plate and distribution riser are designed to directly heat the solvent flowing through the extension riser and the solvent inside the lower tank. The high thermal conductivity and good thermal conductivity allow the extractant to be heated quickly and evaporated. After passing through various vent pipes, intermediate transition chambers and external conduits to the condenser, the extractant flows back to the upper tank to continue the extraction, which significantly improves the purification efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a top cross-sectional view of the upper tank body of this utility model;

[0015] Figure 3 This is an enlarged view of part A of this utility model.

[0016] In the diagram: 1. Upper tank, 2. Inlet, 3. Upper agitator, 4. Upper agitator motor, 5. Condenser, 6. External conduit, 7. Lipophilic filter membrane, 8. Manifold ring, 9. Inclined pipe, 10. Extension riser, 11. Diversion riser, 12. Heating medium diversion plate, 13. Lower tank, 14. Vent pipe, 15. Outlet, 16. Lower agitator motor, 17. Lower agitator, 18. Heating medium inlet, 19. Intermediate transition chamber, 20. Hopper, 21. Heating medium outlet, 22. Baffle plate, 23. Perforated support plate. Detailed Implementation

[0017] The present invention will be described in detail with reference to the accompanying drawings.

[0018] like Figures 1-3 As shown, this high-purity n-hexane high-efficiency purification device based on novel filtration membrane technology includes an extraction tank and a rotary evaporator (omitted in the figure).

[0019] The extraction tank includes an upper tank 1, an intermediate transition chamber 19, and a lower tank 13.

[0020] Five hoppers 20 are centrally located in the intermediate transition chamber 19. The partition 22 between the intermediate transition chamber 19 and the upper tank 1 has clearance holes corresponding to each hopper 20, and perforated support plates 23 are fixed at these clearance holes. Lipophilic filter membranes 7 are laid on the upper surface of each perforated support plate 23. An extension riser 10 is provided at the lower end of each hopper 20, and through holes corresponding to each extension riser 10 are provided on the partition between the intermediate transition chamber 19 and the lower tank 13.

[0021] The lower tank 13 is provided with a heating medium diversion plate 12. The top surface of the heating medium diversion plate 12 is provided with diversion risers 11 corresponding to the extension risers 10. The diversion risers 11 are inserted into the corresponding extension risers 10 and have inclined pipes 9 at their upper ends. The other end of the inclined pipes 9 passes through the side wall of the hopper 20 and the intermediate transition chamber 19. The outer wall of the intermediate transition chamber 19 is fitted with a converging ring 8 that communicates with each inclined pipe 9. The converging ring 8 is also provided with a heating medium outlet 21. The outer wall of the lower tank 13 is provided with a heating medium inlet 18 that communicates with the heating medium diversion plate 12. In this embodiment, there are 5 hoppers 20, one of which is located in the center of the intermediate transition chamber 19, and the other 4 hoppers 20 are evenly arranged around the central hopper 20. The ends of the inclined pipes 9 at the upper ends of the diversion risers 11 pass through the side wall of the hopper 20 and communicate with the adjacent diversion risers 11. The heating medium diversion plate 12 is provided with multiple longitudinal clearance channels, which do not affect the solvent falling to the bottom of the lower tank 13.

[0022] The intermediate transition chamber 19 and the lower tank 13 are further provided with a plurality of vent pipes 14 that communicate with the lower tank 13. An external conduit 6 is provided on the outer wall of the intermediate transition chamber 19. A condenser 5 is fixed on the top of the extraction tank. The inlet of the condenser 5 is connected to the other end of the external conduit 6. The outlet of the condenser 5 is connected to the top of the upper tank 1.

[0023] In this embodiment, an upper stirring motor 4 is fixed to the top of the extraction tank, and an upper stirring paddle 3 connected to the output end of the upper stirring motor 4 is provided in the upper tank body 1. A feed inlet 2 communicating with the upper tank body 1 is provided on the top surface of the extraction tank. The bottom of the lower tank body 13 is conical and a lower stirring motor 16 is fixed to the lower end. A lower stirring paddle 17 connected to the output end of the lower stirring motor 16 is built into the lower part of the lower tank body 13. A discharge port 15 is provided on the lower part of the bottom side wall of the lower tank body 13. The discharge port 15 is connected to the rotary evaporator via a flexible hose.

[0024] Working principle:

[0025] 1. The heating medium is preheated to the working set temperature range through the heating medium distribution plate 12 and the distribution riser 11.

[0026] 2. Add the n-hexane raw material into the upper tank 1, then add the extractant, start the upper stirring motor 4, and drive the upper stirring paddle 3 to rotate, so that the n-hexane raw material and the extractant are mixed evenly.

[0027] 3. After the hexane component is mixed with the extractant, a solvent is formed. The solvent falls through the lipophilic filter membrane 7 into the feed hopper 20, and then flows down into the lower tank 13 through the annular channel formed by the extended riser 10 and the diversion riser 11, where it is rapidly accelerated. Since the boiling point of the extractant component in the solvent is lower than that of hexane, the extractant component evaporates and vaporizes after being heated. It then flows through the various vent pipes 14, the intermediate transition chamber 19, and the outer conduit 6 to the condenser 5, and then flows back to the upper tank 1 to continue participating in the extraction. During this process, the lower stirring motor 16 is started, driving the lower stirring paddle 17 to rotate, thereby accelerating the evaporation and vaporization of the extractant.

[0028] 4. After extraction, the extract phase in the lower tank 13 is sent to the rotary evaporator through the outlet 15 and hose. The rotary evaporator is used to further purify and separate the residual extractant in the extract phase, thereby improving the purity of n-hexane.

[0029] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this patent.

Claims

1. A high-purity n-hexane efficient purification device based on a new type of filter membrane technology, comprising an extraction tank and a rotary evaporator, characterized in that: The extraction tank comprises an upper tank body, an intermediate transition bin and a lower tank body, a plurality of lower hoppers are arranged in the intermediate transition bin, the partition plates of the intermediate transition bin and the upper tank body are provided with avoidance holes corresponding to the lower hoppers respectively, and hollow support plates are fixed at the avoidance holes, the upper surfaces of the hollow support plates are paved with lipophilic filter membranes, the lower ends of the lower hoppers are provided with extension vertical pipes, the partition plates of the intermediate transition bin and the lower tank body are provided with through holes corresponding to the extension vertical pipes respectively, the lower tank body is provided with a heating medium distribution plate, the top surface of the heating medium distribution plate is provided with distribution vertical pipes corresponding to the extension vertical pipes respectively, the distribution vertical pipes are inserted into the corresponding extension vertical pipes and are provided with inclined pipes at the upper ends, the other ends of the inclined pipes pass through the side walls of the lower hoppers and the intermediate transition bin, the outer walls of the intermediate transition bin are sleeved with current rings in communication with the inclined pipes, the current rings are additionally provided with heating medium outlets, the outer walls of the lower tank body are provided with heating medium inlets in communication with the heating medium distribution plate, the partition plates of the intermediate transition bin and the lower tank body are additionally provided with a plurality of air pipes in communication with the lower tank body, the outer walls of the intermediate transition bin are provided with outer guide pipes, a condenser is fixed at the top of the extraction tank, the inlet of the condenser is connected with the other end of the outer guide pipe, and the outlet of the condenser is in communication with the top of the upper tank body. ​ 2. The high-purity n-hexane efficient purification device based on a novel filtration membrane technology according to claim 1, characterized in that: An upper stirring motor is fixed at the top of the extraction tank, the upper tank body is provided with an upper stirring paddle connected with the output end of the upper stirring motor, and the top surface of the extraction tank is provided with a feeding port in communication with the upper tank body.

3. The high-purity n-hexane efficient purification device based on a novel filtration membrane technology according to claim 1, characterized in that: The bottom of the lower tank body is in the shape of a cone hopper and is fixed with a lower stirring motor at the lower end, the lower tank body is internally provided with a lower stirring paddle connected with the output end of the lower stirring motor, the bottom surface of the lower tank body is provided with a discharging port at the lower part of the side wall, and the discharging port is in communication with a rotary evaporator through a hose.

4. The high-purity n-hexane efficient purification device based on a novel filtration membrane technology according to claim 1, characterized in that: The number of the lower hoppers is five, one of which is arranged at the center of the intermediate transition bin, and the other four lower hoppers are uniformly arranged around the central lower hopper, and the ends of the inclined pipes at the upper ends of the distribution vertical pipes are in communication with the adjacent distribution vertical pipes after passing through the side walls of the lower hoppers.

5. The high-purity n-hexane efficient purification device based on a novel filtration membrane technology according to claim 1, characterized in that: The heating medium distribution plate is provided with a plurality of longitudinal avoidance channels.

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