Device for zero-loss distillation of low-boiling-point thermosensitive substance
By combining a gear feed pump, a vacuum degasser, and a thin-film evaporator, along with a series vacuum pump and a Roots pump and jacketed cooling water cooling, the problem of material loss in the distillation process of heat-sensitive low-boiling-point substances was solved, achieving zero-loss distillation, improving product yield, and reducing energy consumption.
Patent Information
- Application Number
- CN202423178015.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-23
AI Technical Summary
Current technology cannot distill heat-sensitive low-boiling-point substances without loss of materials. Atmospheric distillation leads to decomposition, while vacuum distillation results in material loss.
Employing a gear feed pump, vacuum degasser, thin-film evaporator, and cooling circulation system, the distillation process achieves zero-loss distillation through thin-film distillation under extreme vacuum conditions, combined with a series vacuum pump of rotary vane pump and Roots pump, and cooling with jacketed cooling water.
It achieves near-zero-loss distillation of low-boiling-point heat-sensitive substances, reducing material loss, increasing product yield, and reducing energy consumption.
Smart Images
Figure CN223615394U_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of organic compound refining, and specifically relates to a device for zero-loss distillation of low-boiling-point thermosensitive substances. Background Technology
[0002] In the purification process of organic compounds, some heat-sensitive low-boiling-point substances cannot be distilled by either atmospheric distillation or vacuum distillation. Atmospheric distillation causes decomposition of the heat-sensitive substances, while vacuum distillation results in material loss due to prolonged negative pressure. This invention, however, can distill low-boiling-point heat-sensitive substances with almost zero loss. Utility Model Content
[0003] The purpose of this invention is to provide a device for zero-loss distillation of low-boiling-point thermosensitive substances, which can achieve almost zero-loss distillation of low-boiling-point thermosensitive substances and solve the above-mentioned technical problems.
[0004] The purpose of this utility model is achieved as follows: a device for zero-loss distillation of low-boiling-point heat-sensitive substances includes a gear feed pump, which is connected to the inlet of a degasser via a first pipe, the outlet of the degasser is connected to the inlet of a thin-film evaporator via a second pipe, the outlet of the thin-film evaporator is connected to a material collection device via a third pipe, the material collection device is also connected to a vacuum mechanism, and a cooling circulation mechanism is provided corresponding to the material collection device.
[0005] This invention first uses a series vacuum pump unit to purge air from the system, ensuring a state of ultimate vacuum. Then, the ball valve is closed and the cooling circulation mechanism is adjusted. Once the appropriate temperature is reached, the degassed material at the desired temperature is fed into a thin-film evaporator for distillation. The entire distillation process can be completed without turning on the vacuum pump, ensuring almost zero material loss. Compared with existing technologies, the advantages of this invention are: reduced material loss, increased product yield, and reduced energy consumption.
[0006] As a further improvement of this utility model, the degassing machine is a vacuum degassing machine.
[0007] As a further improvement of this utility model, the material collecting device is a receiving cylinder, which includes an inner cylinder and an outer cylinder, with a sandwich layer between the inner and outer cylinders. A closed cavity for collecting materials is provided inside the inner cylinder. Cooling water within the sandwich layer is used to cool the material inside the inner cylinder.
[0008] As a further improvement of this utility model, the vacuum pumping mechanism includes a rotary vane pump and a Roots pump connected in series. The suction port of the rotary vane pump is connected to the closed cavity of the inner cylinder via a pipe four, and a ball valve is installed on the pipe four. By connecting the rotary vane pump and the Roots pump in series, the vacuum pumping power is increased.
[0009] As a further improvement of this utility model, the cooling circulation mechanism includes a low-temperature cooling circulation pump. The inlet of the low-temperature cooling circulation pump is connected to the interlayer between the inner and outer cylinders via pipe five, and the outlet of the low-temperature cooling circulation pump is connected to the interlayer via pipe six. The interlayer is filled with cooling water. The cooling water in the interlayer cools the material inside the inner cylinder, and the low-temperature cooling circulation pump circulates the cooling water between pipes five and six to form a loop. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the structure of this utility model.
[0011] Among them, 1 is a gear feed pump, 2 is pipe one, 3 is a degasser, 4 is pipe two, 5 is a thin film evaporator, 6 is pipe three, 7 is a material collection device, 701 is an inner cylinder, 702 is an outer cylinder, 703 is a jacket, 704 is a closed cavity, 8 is a vacuum mechanism, 9 is pipe four, 10 is a ball valve, 11 is a low temperature cooling circulation pump, 12 is pipe five, and 13 is pipe six. Detailed Implementation
[0012] like Figure 1 As shown, this is an apparatus for zero-loss distillation of low-boiling-point heat-sensitive substances, including a gear feed pump 1, which is connected to the inlet of a degasser 3 via a pipe 2. The degasser 3 is a vacuum degasser 3. The outlet of the degasser 3 is connected to the inlet of a thin-film evaporator 5 via a pipe 4. The outlet of the thin-film evaporator 5 is connected to a material collection device 7 via a pipe 6. The material collection device 7 is also connected to a vacuum mechanism 8. A cooling circulation mechanism is provided corresponding to the material collection device 7.
[0013] The material collection device 7 is a receiving cylinder, which includes an inner cylinder 701 and an outer cylinder 702. A sandwich 703 is formed between the inner cylinder 701 and the outer cylinder 702. A closed cavity 704 for collecting materials is provided inside the inner cylinder 701. Cooling water in the sandwich 703 is used to cool the material inside the inner cylinder 701. The vacuuming mechanism 8 includes a rotary vane pump and a Roots pump connected in series. The suction port of the rotary vane pump is connected to the closed cavity 704 of the inner cylinder 701 via pipe 4 9. A ball valve 10 is installed on pipe 4 9. The two pumps, the rotary vane pump and the Roots pump, are connected in series to increase the vacuuming power. The cooling circulation mechanism includes a cryogenic cooling circulation pump 11. The inlet of the cryogenic cooling circulation pump 11 is connected to the sandwich 703 between the inner cylinder 701 and the outer cylinder 702 via pipe 5 12. The outlet of the cryogenic cooling circulation pump 11 is connected to the sandwich 703 via pipe 6 13. Cooling water is filled inside the sandwich 703. The cooling water in the jacket 703 cools the material inside the inner cylinder 701, and the low-temperature cooling circulation pump 11 circulates the cooling water between pipe five 12 and pipe six 13 to form a loop.
[0014] This invention first uses a series vacuum pump unit to expel air from the system, ensuring a state of ultimate vacuum. Then, ball valve 10 is closed and the cooling circulation mechanism is adjusted. Once the appropriate temperature is reached, the degassed material at the appropriate temperature is introduced into the thin-film evaporator 5 for distillation. The entire distillation process can be completed without turning on the vacuum pump, ensuring almost zero material loss. The advantages of this invention are: reduced material loss, increased product yield, and reduced energy consumption.
[0015] When this invention is used for the distillation of trifluoromethoxyphenol, the system is evacuated to 1.5 Pa using a rotary vane pump and a Roots pump, the inner cylinder 701 of the receiving cylinder is cooled to -40°C, the ball valve 10 is closed, the gear feed pump 1 starts feeding, the feed temperature is 20°C, the flow rate is 50 mL / min, and the rotation speed of the thin film evaporator 5 is 350 rpm.
[0016] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.
Claims
1. An apparatus for zero-loss distillation of low-boiling-point thermosensitive substances, characterized in that, It includes a gear feed pump, which is connected to the inlet of the degasser via a first pipe. The outlet of the degasser is connected to the inlet of the thin film evaporator via a second pipe. The outlet of the thin film evaporator is connected to a material collection device via a third pipe. The material collection device is also connected to a vacuum mechanism. A cooling circulation mechanism is provided corresponding to the material collection device.
2. The apparatus for zero-loss distillation of low-boiling-point thermosensitive substances according to claim 1, characterized in that, The degassing machine is a vacuum degassing machine.
3. The apparatus for zero-loss distillation of low-boiling-point thermosensitive substances according to claim 1 or 2, characterized in that, The material collection device is a receiving cylinder, which includes an inner cylinder and an outer cylinder, with an interlayer formed between the inner and outer cylinders. The inner cylinder has a closed cavity for collecting materials.
4. The apparatus for zero-loss distillation of low-boiling-point thermosensitive substances according to claim 3, characterized in that, The vacuum pumping mechanism includes a rotary vane pump and a Roots pump connected in series. The suction port of the rotary vane pump is connected to the closed cavity of the inner cylinder via pipe four, and a ball valve is installed on pipe four.
5. The apparatus for zero-loss distillation of low-boiling-point thermosensitive substances according to claim 3, characterized in that, The cooling circulation mechanism includes a low-temperature cooling circulation pump. The inlet of the low-temperature cooling circulation pump is connected to the interlayer between the inner and outer cylinders via pipe five, and the outlet of the low-temperature cooling circulation pump is connected to the interlayer via pipe six. The interlayer is filled with cooling water.