Separation device and production system of 4-methyl-2-pentanone
By combining a three-tower continuous distillation system and a phase separation device, the separation problem of water, 4-methyl-2-pentanone and the complex C9 azeotropic system was solved, realizing the production of high-purity 4-methyl-2-pentanone and reducing energy consumption and operational complexity.
Patent Information
- Application Number
- CN202520012000.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-01-02
AI Technical Summary
Existing technologies struggle to efficiently separate the complex azeotropic system of water, 4-methyl-2-pentanone, and C9, resulting in low purity of 4-methyl-2-pentanone, complex operation, and high energy consumption.
A three-tower continuous distillation system, including a first distillation column, a second distillation column, and a third distillation column, combined with a phase separation device, is used to achieve efficient separation of water, 4-methyl-2-pentanone, and C9 through multiple distillations and phase separation processes.
It achieves efficient separation of 4-methyl-2-pentanone with a purity greater than 95%, reducing energy consumption and operational complexity while improving separation efficiency.
Smart Images
Figure CN223716393U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the separation purification field of organic matter, and specifically, relates to a separation device and a production system of 4-methyl-2-pentanone. BACKGROUND
[0002] Because water, 4-methyl-2-pentanone, 4-methyl-2-pentanol and C9 exist multiple groups of azeotrope, for example, water and 4-methyl-2-pentanone azeotrope, 4-methyl-2-pentanone and C9 (mainly 1,3,5-trimethylcyclohexane and its isomers) azeotrope, water, 4-methyl-2-pentanone and C9 three-component azeotrope, water, 4-methyl-2-pentanol and C9 three-component azeotrope, due to the existence of C9, the azeotrope system is more complex, and there is little report on the related separation technology.
[0003] Because of the existence of azeotrope, it is difficult to obtain high-purity 4-methyl-2-pentanone by ordinary rectification method, and the ordinary rectification method has large circulation amount and high energy consumption; the extraction rectification selects the appropriate extractant, and theoretically, the separation of C9, water and 4-methyl-2-pentanone can be realized, but due to the recycling of the extractant, the energy consumption is high, and incomplete separation of the extractant will have a great influence on the reaction and the product.
[0004] In view of this, the utility model is provided. UTILITY MODEL CONTENT
[0005] The utility model aims at providing a separation device and a production system of 4-methyl-2-pentanone, and aims at improving at least one problem mentioned in the background art.
[0006] The embodiment of the utility model is realized as follows:
[0007] In a first aspect, the utility model provides a separation device of water, 4-methyl-2-pentanone and C9, which comprises a first rectifying tower, a second rectifying tower, a third rectifying tower and a phase separation device;
[0008] The feed inlet of the first rectifying tower is connected with a mixed material inlet pipe, the overhead material outlet of the first rectifying tower is connected with the inlet of the phase separation device, and the column material outlet of the first rectifying tower is connected with the feed inlet of the third rectifying tower;
[0009] The upper phase outlet of the phase separation device is communicated with the feed inlet of the second rectifying tower, and the lower phase outlet of the phase separation device is connected with a waste water drainage pipe;
[0010] The overhead material outlet of the second rectifying tower is communicated with a first overhead material discharge pipe, and the column material outlet of the second rectifying tower is connected with a first column material discharge pipe;
[0011] The overhead material outlet of the third rectifying tower is communicated with the second overhead material discharge pipe, and the bottom material outlet of the third rectifying tower is connected with the second bottom material discharge pipe.
[0012] In an optional embodiment, the first overhead material discharge pipe is communicated with the feed inlet of the first rectifying tower.
[0013] In an optional embodiment, the second overhead material discharge pipe is communicated with the feed inlet of the first rectifying tower.
[0014] In an optional embodiment, the first rectifying tower has 18-22 plates.
[0015] In an optional embodiment, the second rectifying tower has 28-32 plates.
[0016] In an optional embodiment, the third rectifying tower has 28-32 plates.
[0017] In an optional embodiment, the first rectifying tower is provided with a first overhead reflux pipe, the upper part of the first rectifying tower is provided with a first reflux port, one end of the first overhead reflux pipe is communicated with the overhead outlet of the first rectifying tower, the other end of the first overhead reflux pipe is communicated with the first reflux port, and a first condenser is arranged on the first overhead reflux pipe.
[0018] A phase separation device connecting pipe is connected between the first condenser and the first reflux port on the first overhead reflux pipe, and the phase separation device connecting pipe is connected with the inlet of the phase separation device.
[0019] In an optional embodiment, the second rectifying tower is provided with a second overhead reflux pipe, the upper part of the second rectifying tower is provided with a second reflux port, one end of the second overhead reflux pipe is communicated with the overhead outlet of the second rectifying tower, the other end of the second overhead reflux pipe is communicated with the second reflux port, and a second condenser is arranged on the second overhead reflux pipe.
[0020] The first overhead material discharge pipe is connected on the second overhead reflux pipe, and the connection point is between the second condenser and the second reflux port.
[0021] In an optional embodiment, the third rectifying tower is provided with a third overhead reflux pipe, the upper part of the third rectifying tower is provided with a third reflux port, one end of the third overhead reflux pipe is communicated with the overhead outlet of the third rectifying tower, the other end of the third overhead reflux pipe is communicated with the third reflux port, and a third condenser is arranged on the third overhead reflux pipe.
[0022] The second overhead material discharge pipe is connected on the third overhead reflux pipe, and the connection point is between the third condenser and the third reflux port.
[0023] In a second aspect, the utility model provides a 4 -methyl -2 -pentanone production system, including the separation device of any preceding embodiment.
[0024] The utility model discloses an embodiment beneficial effect is:
[0025] The separation device provided by the utility model, owing to the specific setting of the first rectifying tower and the two ordinary rectifying towers, preferably solves the separation problem of water, 4-methyl-2-pentanone and C9 complex azeotrope system, especially the azeotrope of C9 and 4-methyl-2-pentanone leads to the difficulty in separating 4-methyl-2-pentanone and C9, and it is difficult to obtain 4-methyl-2-pentanone with high purity, and the prior art operation is complex, energy consumption is high, and the separation C9 effect is not ideal, and 4-methyl-2-pentanone with purity greater than 95% can be obtained. BRIEF DESCRIPTION OF DRAWINGS
[0026] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will be needed to use the drawings in the embodiment briefly introduces, should understand, the following drawings only shows some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for the ordinary skilled person in the art comes, under the premise of not paying the creative labor, can also obtain other related drawings according to these drawings.
[0027] Figure 1 The structure diagram of the separation device provided in the utility model embodiment.
[0028] Icon: 100-separation device;110-first rectifying tower;111-mixture material inlet pipe;114-first tower top reflux pipe;115-first condenser;116-phase separation device connecting pipe;117-first reflux port;120-second rectifying tower;121-first tower top material discharge pipe;122-first tower kettle material discharge pipe;124-second tower top reflux pipe;125-second condenser;127-second reflux port;130-third rectifying tower;131-second tower top material discharge pipe;132-second tower kettle material discharge pipe;134-third tower top reflux pipe;135-third condenser;137-third reflux port;140-phase separation device;141-waste water drain pipe; DETAILED DESCRIPTION
[0029] In order to make the purpose, technical scheme and advantage of the utility model embodiment more clearly, the following will be combined with the drawings in the utility model embodiment, and the technical scheme in the utility model embodiment is clearly and completely described, obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiment. The components of the utility model embodiment described and shown in the drawing here can be arranged and designed in various different configurations.
[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0033] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0034] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0035] like Figure 1 As shown, this utility model embodiment provides a separation device 100 for water, 4-methyl-2-pentanone and C9, including a first distillation column 110, a second distillation column 120, a third distillation column 130 and a phase separation device 140;
[0036] The feed inlet of the first rectifying tower 110 is connected with the mixture inlet pipe 111, the overhead material outlet of the first rectifying tower 110 is connected with the inlet of the phase separation device 140, and the tower bottom material outlet of the first rectifying tower 110 is connected with the feed inlet of the third rectifying tower 130;
[0037] The upper phase outlet of the phase separation device 140 is communicated with the feed inlet of the second rectifying tower 120, and the lower phase outlet of the phase separation device 140 is connected with the waste water drainage pipe 141;
[0038] The overhead material outlet of the second rectifying tower 120 is communicated with the first overhead material discharge pipe 121, and the tower bottom material outlet of the second rectifying tower 120 is connected with the first tower bottom material discharge pipe 122;
[0039] The overhead material outlet of the third rectifying tower 130 is communicated with the second overhead material discharge pipe 131, and the tower bottom material outlet of the third rectifying tower 130 is connected with the second tower bottom material discharge pipe 132.
[0040] The separation device 100 provided by the embodiment of the utility model is mainly used for separating water, 4-methyl-2-pentanone and C9.
[0041] The mixture containing water, 4-methyl-2-pentanone and C9 is sent to the first rectifying tower 110 through the mixture inlet pipe 111, the first azeotrope mixture stream mainly composed of 4-methyl-2-pentanone and a small amount of water and C9 is obtained at the top of the tower, and the second azeotrope mixture stream mainly composed of 4-methyl-2-pentanone and C9 (mainly 1,3,5-trimethylcyclohexane and its isomers) and a small amount of water is obtained at the tower bottom;
[0042] The first azeotrope mixture stream enters the phase separation device 140, the water phase sinks in the phase separation device 140, the water phase is discharged from the phase separation device 140 and enters a subsequent waste water treatment unit for treatment through the waste water drainage pipe 141, and the oil phase in the upper part of the phase separation device 140 is mainly composed of 4-methyl-2-pentanone and a small amount of water;
[0043] The oil phase in the upper part of the phase separation device 140 enters the second rectifying tower for separation, the third azeotrope mixture stream mainly composed of 4-methyl-2-pentanone and a small amount of water and a small amount of C9 is obtained at the top of the tower, and the 4-methyl-2-pentanone stream with a purity of more than 95% is obtained at the tower bottom, and the high-purity 4-methyl-2-pentanone stream is discharged through the first tower bottom material discharge device;
[0044] The second azeotropic mixture stream of the first rectification tower 110 tank is introduced into the third rectification tower 130, and is separated through the third rectification tower 130, and a fourth azeotropic mixture stream mainly composed of 4-methyl-2-pentanone, a small amount of water and a small amount of C9 is obtained at the top, and a stream with a C9 (mainly 1,3,5-trimethylcyclohexane and its isomers) purity of greater than or equal to 92% is obtained at the tank, and is discharged through the second tank material discharge pipe 132. The technical scheme can be used for separating a water, 4-methyl-2-pentanone and C9 mixture, and high-purity 4-methyl-2-pentanone and C9 are obtained.
[0045] Therefore, the separation device 100 provided in the embodiment of the present application can be used for separating a water, 4-methyl-2-pentanone and C9 mixture, and high-purity 4-methyl-2-pentanone and C9 are obtained. The device solves the problem of separating a water, 4-methyl-2-pentanone and C9 complex azeotropic system, in particular, the azeotropy of C9 and 4-methyl-2-pentanone leads to the difficulty in separating 4-methyl-2-pentanone and C9, and it is difficult to obtain high-purity 4-methyl-2-pentanone, and the prior art has the problems of complex operation, high energy consumption and unsatisfactory C9 separation effect, and high-purity 4-methyl-2-pentanone with a purity of greater than 95% can be obtained.
[0046] Optionally, the first rectification tower, the second rectification tower and the third rectification tower are all conventional rectification towers, and the structures thereof will not be described herein.
[0047] Optionally, the phase separation device is a phase separation tank.
[0048] Optionally, the first tower top material discharge pipe 121 is in communication with the feed inlet of the first rectification tower 110.
[0049] The first tower top material discharge pipe 121 returns the water and 4-methyl-2-pentanone mixture to the first rectification tower 110 for separation again.
[0050] Optionally, the second tower top material discharge pipe 131 is in communication with the feed inlet of the first rectification tower 110.
[0051] The second tower top material discharge pipe 131 returns the small amount of 4-methyl-2-pentanone and C9 mixture stream to the first rectification tower 110 for separation again.
[0052] Optionally, in order to ensure a good separation effect, the number of tower plates of the first rectification tower 110 is 18-22.
[0053] Optionally, in order to ensure a good separation effect, the number of tower plates of the second rectification tower 120 is 28-32.
[0054] Optionally, in order to ensure a good separation effect, the number of tower plates of the third rectification tower 130 is 28-32.
[0055] Further, the first rectifying tower 110 is provided with a first overhead reflux pipe 114 at the top thereof, and the upper portion of the first rectifying tower 110 is provided with a first reflux port 117, one end of the first overhead reflux pipe 114 is communicated with a top discharge port of the first rectifying tower 110, the other end of the first overhead reflux pipe 114 is communicated with the first reflux port 117, and the first overhead reflux pipe 114 is provided with a first condenser 115;
[0056] The first overhead reflux pipe 114 is connected with a phase separation device connecting pipe 116 between the first condenser 115 and the first reflux port 117, and the phase separation device connecting pipe 116 is connected with an inlet of a phase separation device 140.
[0057] Further, the second rectifying tower 120 is provided with a second overhead reflux pipe 124 at the top thereof, and the upper portion of the second rectifying tower 120 is provided with a second reflux port 127, one end of the second overhead reflux pipe 124 is communicated with a top discharge port of the second rectifying tower 120, the other end of the second overhead reflux pipe 124 is communicated with the second reflux port, and the second overhead reflux pipe 124 is provided with a second condenser 125;
[0058] The first overhead material discharge pipe 121 is connected to the second overhead reflux pipe 124, and the connection point is between the second condenser 125 and the second reflux port 127.
[0059] Further, the third rectifying tower 130 is provided with a third overhead reflux pipe 134 at the top thereof, and the upper portion of the third rectifying tower 130 is provided with a third reflux port 137, one end of the third overhead reflux pipe 134 is communicated with a top discharge port of the third rectifying tower 130, the other end of the third overhead reflux pipe 134 is communicated with the third reflux port 137, and the third overhead reflux pipe 134 is provided with a third condenser 135;
[0060] The second overhead material discharge pipe 131 is connected to the third overhead reflux pipe 134, and the connection point is between the third condenser 135 and the third reflux port 137.
[0061] The utility model also provides a production system of 4-methyl-2-pentanone, which comprises the separation device 100 provided in the utility model embodiment.
[0062] In the production of 4-methyl-2-pentanone, the product obtained by reaction is usually a mixture of water, 4-methyl-2-pentanone and C9, which can be separated by the separation device 100 provided in the utility model embodiment to obtain 4-methyl-2-pentanone with high purity.
[0063] The following will be described in conjunction with specific implementation cases.
[0064] Embodiment
[0065] The mixture containing 1.97% of water, 77.39% of 4-methyl-2-pentanone and about 20.64% of C9 is sent to the first rectifying tower 110, the theoretical plate number of the first rectifying tower 110 is 20, the tower top temperature is 83℃, the tower bottom temperature is 83℃, the reflux ratio is 3, the first azeotrope mixture stream containing 2.25% of water, 90.20% of 4-methyl-2-pentanone and about 7.55% of C9 is obtained at the tower top, the second azeotrope mixture stream containing 66.38% of 4-methyl-2-pentanone, 2.55% of water and about 31.07% of C9 is obtained at the tower bottom, the first azeotrope mixture stream enters the phase separation device 140, the water phase is mainly a water stream to the waste water treatment unit at the rear end, and the oil phase at the tower bottom containing 4-methyl-2-pentanone and a small amount of water enters the second rectifying tower 120 for separation, the theoretical plate number of the second rectifying tower 120 is 30, the tower top temperature is 82℃, the tower bottom temperature is 115℃, the reflux ratio is 3, the third azeotrope mixture stream containing 14.97% of water, 67.73% of 4-methyl-2-pentanone and about 17.30% of C9 is obtained at the tower top and is returned to the first rectifying tower 110 for recycling, the second rectifying tower 120 obtains 4-methyl-2-pentanone with a purity of 95.17% at the tower bottom, and the rest is a C9 impurity stream; the second azeotrope mixture stream enters the third rectifying tower 130, is separated through the third rectifying tower 130, the theoretical plate number of the first rectifying tower 110 is 30, the tower top temperature is 93℃, the tower bottom temperature is 121℃, the reflux ratio is 3, the fourth azeotrope mixture stream containing 72.92% of 4-methyl-2-pentanone, about 24.25% of C9 and 2.83% of water is obtained at the tower top, and the fourth azeotrope mixture stream is sent to the first rectifying tower 110 for recycling, and a stream containing about 92.48% of C9 and 7.52% of 4-methyl-2-pentanone is obtained at the tower bottom.
[0066] The content of each substance at different positions in the embodiment is shown in Table 1:
[0067] Table 1: Content of each substance at different positions
[0068]
[0069] In summary, the separation device 100 provided in the embodiment of the utility model can be used for separating the mixture of water, 4-methyl-2-pentanone and C9, and outputting 4-methyl-2-pentanone and C9 with high purity.
[0070] The preferred embodiments of the utility model are described above, but the utility model is not limited to the above, and the utility model can be changed and modified in various ways for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A separating device, characterized in that The separation device comprises a first rectifying tower, a second rectifying tower, a third rectifying tower and a phase separation device. The feed inlet of the first rectifying tower is connected with a mixture inlet pipe, the overhead outlet of the first rectifying tower is connected with the inlet of the phase separation device, and the bottom outlet of the first rectifying tower is connected with the feed inlet of the third rectifying tower. The upper phase outlet of the phase separation device is communicated with the feed inlet of the second rectifying tower, and the lower phase outlet of the phase separation device is connected with a waste water outlet pipe. The overhead outlet of the second rectifying tower is communicated with a first overhead outlet pipe, and the bottom outlet of the second rectifying tower is connected with a first bottom outlet pipe. The overhead outlet of the third rectifying tower is communicated with a second overhead outlet pipe, and the bottom outlet of the third rectifying tower is connected with a second bottom outlet pipe.
2. The separation device of claim 1, wherein, The first overhead outlet pipe is communicated with the feed inlet of the first rectifying tower.
3. The separation device of claim 1, wherein, The second overhead outlet pipe is communicated with the feed inlet of the first rectifying tower.
4. The separation device of claim 1, wherein, The first rectifying tower has 18-22 plates.
5. The separation device of claim 1, wherein, The second rectifying tower has 28-32 plates.
6. The separation device of claim 1, wherein, The third rectifying tower has 28-32 plates.
7. The separation device of claim 1, wherein, The first rectifying tower is provided with a first overhead reflux pipe at the top, and is provided with a first reflux port at the upper part, one end of the first overhead reflux pipe is communicated with the overhead outlet of the first rectifying tower, the other end of the first overhead reflux pipe is communicated with the first reflux port, and a first condenser is arranged on the first overhead reflux pipe. A phase separation device connecting pipe is connected between the first condenser and the first reflux port on the first overhead reflux pipe, and the phase separation device connecting pipe is connected with the inlet of the phase separation device.
8. The separation device of claim 6, wherein, The second rectifying tower is provided with a second overhead reflux pipe at the top, and is provided with a second reflux port at the upper part, one end of the second overhead reflux pipe is communicated with the overhead outlet of the second rectifying tower, the other end of the second overhead reflux pipe is communicated with the second reflux port, and a second condenser is arranged on the second overhead reflux pipe. The first overhead outlet pipe is connected on the second overhead reflux pipe, and the connection point is between the second condenser and the second reflux port.
9. The separation device of claim 8, wherein, The third rectifying tower is provided with a third overhead reflux pipe at the top, and is provided with a third reflux port at the upper part, one end of the third overhead reflux pipe is communicated with the overhead outlet of the third rectifying tower, the other end of the third overhead reflux pipe is communicated with the third reflux port, and a third condenser is arranged on the third overhead reflux pipe. The second overhead outlet pipe is connected on the third overhead reflux pipe, and the connection point is between the third condenser and the third reflux port.
10. A production system of 4-methyl-2-pentanone, characterized by comprising: The separation device comprises a first rectifying tower, a second rectifying tower, a third rectifying tower and a phase separation device.