Batch rectification device for purifying 1, 5-dimethyl-2-pyrrolidone

Abstract

The utility model belongs to the technical field of chemical engineering experiments, and particularly relates to a batch rectification device for purifying 1, 5-dimethyl-2-pyrrolidone, which comprises a workbench, the top of the workbench is fixedly connected with a motor; the output end of the motor is fixedly connected with a turntable; a sliding groove is formed in the end of the rotating disc. According to the intermittent rectification and purification device, the heating device is arranged, so that when the intermittent rectification and purification device rotates, internal liquid rapidly rotates, then the internal liquid is heated through the heating device, and the contact area between the liquid and gas can be increased through rotation, so that the mass transfer process between the gas and the liquid is favorably promoted, and the rectification efficiency is improved; in the distillation process, internal steam is guided through the flow guide pipe, and then is condensed through the condenser to finish liquid collection, so that the production quality of 1, 5-dimethyl-2-pyrrolidone is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical experiments, and specifically relates to a batch distillation device for purifying 1,5-dimethyl-2-pyrrolidone. Background Art

[0002] 1,5-Dimethyl-2-pyrrolidone is an organic compound; it is in a colorless liquid state and has specific physical properties, such as a boiling point of 215 - 217 °C and a relative density of 0.982, etc.; this compound is soluble in ethanol and acetone but insoluble in water.

[0003] Distillation is an important separation technique used to separate different components in a mixture according to their boiling point differences; during the production process of 1,5-dimethyl-2-pyrrolidone, some impurities or by-products may be generated, and these impurities can be removed through distillation to obtain 1,5-dimethyl-2-pyrrolidone with higher purity.

[0004] Currently, in the prior art, when performing distillation operations on 1,5-dimethyl-2-pyrrolidone, the liquid inside usually continuously accumulates inside the reaction kettle, resulting in a smaller heating range, uneven heating of the liquid, and thus affecting the distillation effect and reducing the purity and yield of the product; therefore, a batch distillation device for purifying 1,5-dimethyl-2-pyrrolidone is proposed to solve the above problems. Summary of the Utility Model

[0005] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art, the utility model proposes a batch distillation device for purifying 1,5-dimethyl-2-pyrrolidone.

[0006] The technical solution adopted by the utility model to solve its technical problems is: A batch distillation device for purifying 1,5-dimethyl-2-pyrrolidone according to the utility model includes a workbench; a motor is fixedly connected to the top of the workbench; the output end of the motor is fixedly connected to a turntable; a chute is provided at the end of the turntable; a clamping plate is slidably connected inside the chute; a spring is fixedly connected to the end of the clamping plate, and the other end of the spring is fixedly connected to the inner side wall of the chute; the side end of the clamping plate is attached to an intermittent distillation and purification device; a fixed rod is fixedly connected to the top of the workbench; a condenser is installed at the top of the fixed rod; a diversion pipe is fixedly connected to the end of the condenser, and the other end of the diversion pipe is rotatably connected to the top of the intermittent distillation and purification device.

[0007] Preferably, a protective soft pad is fixedly connected to the end of the clamping plate; a spring piece is fixedly connected to the bottom of the protective soft pad, and the other end of the spring piece is fixedly connected to the side wall of the clamping plate.

[0008] Preferably, a return pipe is fixedly connected to the inner side wall of the guide pipe, and one end of the return pipe is wider and the other end is narrower.

[0009] Preferably, a sealing block is fixed to the top of the interstitial distillation purification device, and the other end of the flow guide tube is rotatably connected to the inside of the sealing block.

[0010] Preferably, the bottom of the workbench is fixedly connected with supporting legs, and a plurality of supporting legs are provided.

[0011] Preferably, a friction plate is fixed to the bottom of the supporting leg.

[0012] Preferably, the slide grooves are arranged in a circular array inside the turntable.

[0013] Beneficial effects of the utility model:

[0014] 1. The utility model provides an intermittent distillation device for purifying 1,5-dimethyl-2-pyrrolidone, wherein the intermittent distillation purification device is placed on the surface of a turntable, and a clamping plate is squeezed during the placement process so that the clamping plate is opened to both sides and an elastic force is generated by the squeezing spring. When the intermittent distillation purification device is placed, the elastic force generated by the spring pushes the clamping plate to clamp on the outer side wall of the intermittent distillation purification device for fixation, and then the intermittent distillation purification device is driven to rotate by turning on a motor, so that when the intermittent distillation purification device rotates, the liquid inside rotates rapidly, and then the liquid inside is heated by a heating device, and then the contact area between the liquid and the gas is increased by the rotation, which helps to promote the mass transfer process between the gas and the liquid and improve the distillation efficiency. During the distillation process, the internal steam is guided by a guide pipe, and then condensed by a condenser to complete the liquid collection, thereby improving the production quality of 1,5-dimethyl-2-pyrrolidone.

[0015] 2. The utility model provides an intermittent distillation device for purifying 1,5-dimethyl-2-pyrrolidone. When the intermittent distillation purification device is squeezing the clamping plate, the protective cushion plays a protective role to reduce the wear problem caused by the intermittent distillation purification device and the clamping plate during the mutual squeezing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 It is a three-dimensional diagram of the utility model;

[0018] Figure 2 It is a cross-sectional view of the utility model;

[0019] Figure 3 is the three-dimensional view of the reflux pipe in the present utility model;

[0020] Figure 4 is Figure 2 the enlarged view at position A in

[0021] Legend:

[0022] 1. Workbench; 21. Motor; 22. Turntable; 23. Fixed rod; 24. Condenser; 25. Slide groove; 26. Clamping plate; 27. Batch rectification and purification device; 28. Diversion pipe; 31. Protective soft pad; 32. Elastic piece; 4. Reflux pipe; 51. Support leg; 52. Friction plate. Specific implementation manners

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] The following gives specific embodiments.

[0025] Please refer to Figures 1-4, the present utility model provides a batch distillation device for purifying 1,5-dimethyl-2-pyrrolidone, including a workbench 1; a motor 21 is fixedly connected to the top of the workbench 1; an output end of the motor 21 is fixedly connected to a turntable 22; a chute 25 is opened at an end of the turntable 22; a clamping plate 26 is slidably connected inside the chute 25; a spring is fixedly connected to an end of the clamping plate 26, and the other end of the spring is fixedly connected to an inner side wall of the chute 25; a side end of the clamping plate 26 is attached to an intermittent rectification and purification device 27; a fixing rod 23 is fixedly connected to the top of the workbench 1; a condenser 24 is installed at the top of the fixing rod 23; a diversion pipe 28 is fixedly connected to an end of the condenser 24, and the other end of the diversion pipe 28 is rotatably connected to the top of the intermittent rectification and purification device 27; during operation, when it is necessary to store 1,5-dimethyl-2-pyrrolidone on the workbench, by placing the intermittent rectification and purification device 27 on the surface of the turntable 22, the clamping plate 26 is squeezed during the placement process, so that the clamping plate 26 spreads to both sides and squeezes the spring to generate elastic force. When the intermittent rectification and purification device 27 is placed, the elastic force generated by the spring pushes the clamping plate 26 to clamp on the outer side wall of the intermittent rectification and purification device 27 for fixation. Then, by turning on the motor 21 to drive the intermittent rectification and purification device 27 to rotate, when the intermittent rectification and purification device 27 rotates, the liquid inside rotates rapidly. Then, the liquid inside is heated by a heating device. Then, rotation can increase the contact area between the liquid and the gas, which helps to promote the mass transfer process between the gas and the liquid and improve the rectification efficiency. During the distillation process, the steam inside is diverted through the diversion pipe 28 and then condensed by the condenser 24 to complete liquid collection, improving the production quality of 1,5-dimethyl-2-pyrrolidone on the workbench.

[0026] Further, as Figures 1-3 shown, a protective soft pad 31 is fixedly connected to an end of the clamping plate 26; an elastic piece 32 is fixedly connected to the bottom of the protective soft pad 31, and the other end of the elastic piece 32 is fixedly connected to a side wall of the clamping plate 26; during operation, when the intermittent rectification and purification device 27 squeezes the clamping plate 26, the protective soft pad 31 plays a protective role to reduce the wear problem caused during the mutual extrusion between the intermittent rectification and purification device 27 and the clamping plate 26.

[0027] Further, as Figure 4 shown, a reflux pipe 4 is fixedly connected to an inner side wall of the diversion pipe 28, and one end of the reflux pipe 4 is wider and the other end is narrower; during operation, when the gas flows through the diversion pipe 28, when it flows through and contacts the condenser 24 through the reflux pipe 4, it is condensed into a liquid and then flows towards the end. The reflux problem is reduced by the interception of the reflux pipe 4.

[0028] Further, as Figures 1-3As shown, a sealing block is fixedly connected to the top of the batch rectification purification device 27, and the other end of the diversion pipe 28 is rotatably connected to the inside of the sealing block; during operation, by installing a sealing block at the top of the batch rectification purification device 27, the connection between the batch rectification purification device 27 and the diversion pipe 28 is sealed.

[0029] Furthermore, as Figures 1-3 shown, support legs 51 are fixedly connected to the bottom of the workbench 1, and there are several of them; during operation, by installing support legs 51 at the bottom of the workbench 1, the overall stability of the workbench 1 is improved.

[0030] Furthermore, as Figures 1-3 shown, a friction plate 52 is fixedly connected to the bottom of the support leg 51; during operation, by installing a friction plate 52 at the bottom of the support leg 51, the effect of increasing friction is achieved, and the problem of violent sliding of the support leg 51 caused by impact is reduced.

[0031] Furthermore, as Figures 1-3 shown, the sliding grooves 25 are arranged in a circular array inside the turntable 22.

[0032] Working principle: When it is necessary to extract 1,5-dimethyl-2-pyrrolidone on the workbench, the intermittent distillation purification device 27 is placed on the surface of the turntable 22. During the placement process, the clamping plate 26 is squeezed so that the clamping plate 26 opens to both sides and the squeezing spring generates elastic force. When the intermittent distillation purification device 27 is placed, the elastic force generated by the spring pushes the clamping plate 26 to clamp on the outer wall of the intermittent distillation purification device 27 for fixation. Then, the motor 21 is turned on to drive the intermittent distillation purification device 27 to rotate. When the intermittent distillation purification device 27 rotates, the liquid inside rotates rapidly, and then the liquid inside is heated by the heating device. Then, the rotation can increase the contact area between the liquid and the gas, which helps to promote the mass transfer process between the gas and the liquid and improve the distillation efficiency. During the distillation process, the internal steam is diverted through the guide pipe 28 and then condensed through the condenser 24 to complete the liquid collection. The production quality of 5-dimethyl-2-pyrrolidone on the workbench 1 is improved; when the intermittent distillation and purification device 27 is squeezing the clamping plate 26, the protective cushion 31 plays a protective role, thereby reducing the wear problem caused by the intermittent distillation and purification device 27 and the clamping plate 26 being squeezed against each other; when the gas circulates through the guide pipe 28, it condenses into liquid when it passes through the reflux pipe 4 and contacts the condenser 24, and then flows to the end, and the problem of reflux is reduced by interception of the reflux pipe 4; by installing a sealing block on the top of the intermittent distillation and purification device 27, the connection between the intermittent distillation and purification device 27 and the guide pipe 28 is sealed; by installing a support leg 51 at the bottom of the workbench 1, the overall stability of the workbench 1 is improved; by installing a friction plate 52 at the bottom of the support leg 51, the friction is increased to reduce the problem of violent sliding of the support leg 51 due to impact.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. An intermittent distillation device for purifying 1,5-dimethyl-2-pyrrolidone, comprising a workbench (1); characterized in that: A motor (21) is fixedly connected to the top of the workbench (1); the output end of the motor (21) is fixedly connected to a turntable (22); a chute (25) is provided at the end of the turntable (22); a clamping plate (26) is slidably connected inside the chute (25); a spring is fixedly connected to the end of the clamping plate (26), and the other end of the spring is fixedly connected to the inner side wall of the chute (25); a side end of the clamping plate (26) is attached to an intermittent rectification and purification device (27); a fixed rod (23) is fixedly connected to the top of the workbench (1); a condenser (24) is installed at the top of the fixed rod (23); a guide pipe (28) is fixedly connected to the end of the condenser (24), and the other end of the guide pipe (28) is rotatably connected to the top of the intermittent rectification and purification device (27).

2. The batch distillation device for purifying 1,5-dimethyl-2-pyrrolidone according to claim 1, wherein: A protective soft pad (31) is fixedly connected to the end of the clamping plate (26); a shrapnel (32) is fixedly connected to the bottom of the protective soft pad (31), and the other end of the shrapnel (32) is fixedly connected to the side wall of the clamping plate (26).

3. The batch distillation apparatus for purifying 1,5-dimethyl-2-pyrrolidone according to claim 1, characterized in that: A reflux pipe (4) is fixedly connected to the inner side wall of the guide pipe (28), and one end of the reflux pipe (4) is wider and the other end is narrower.

4. The batch rectification device for purifying 1,5-dimethyl-2-pyrrolidone according to claim 1, characterized in that: A sealing block is fixedly connected to the top of the intermittent rectification and purification device (27), and the other end of the guide pipe (28) is rotatably connected inside the sealing block.

5. The batch distillation apparatus for purifying 1,5-dimethyl-2-pyrrolidone as claimed in claim 1, wherein: Support legs (51) are fixedly connected to the bottom of the workbench (1), and there are several of them.

6. The batch distillation apparatus for purifying 1,5-dimethyl-2-pyrrolidone according to claim 5, wherein: A friction plate (52) is fixedly connected to the bottom of the support leg (51).

7. An intermittent rectification device for purifying 1,5-dimethyl-2-pyrrolidone as described in claim 1, characterized in that: The chutes (25) are arranged in a circular array inside the turntable (22).

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