CN210331749U - Separation recovery unit of hydration catalyst in cyclohexene hydration product - Google Patents
Separation recovery unit of hydration catalyst in cyclohexene hydration product Download PDFInfo
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- CN210331749U CN210331749U CN201921218261.5U CN201921218261U CN210331749U CN 210331749 U CN210331749 U CN 210331749U CN 201921218261 U CN201921218261 U CN 201921218261U CN 210331749 U CN210331749 U CN 210331749U
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Abstract
The utility model provides a separation recovery unit of catalyst of hydration in cyclohexene hydration product, includes separator, cooler to and the cyclohexene extraction tower, the reaction product access connection inlet pipe of separator for be connected with the hydration reactor, the light phase export of separator is used for being connected with the cyclohexanol separation tower, and the heavy phase export of separator is through the cooler, to the supply of cyclohexene extraction tower. The utility model discloses simple structure, running cost are low, can effectively separate and retrieve target result and hydration catalyst in the cyclohexene hydration reaction product.
Description
Technical Field
The utility model relates to a chemical industry field, in particular to separation recovery unit of hydration catalyst in cyclohexene hydration product.
Background
Cyclohexanol is an important raw material for cyclohexanone, adipic acid and caprolactam in the field of new materials. It is known that cyclohexanol is synthesized by hydration of cyclohexene and then purified cyclohexanol is obtained by separating a high-boiling fraction and a low-boiling fraction by distillation.
Under the action of a zeolite molecular sieve catalyst, cyclohexene and water are hydrated to generate cyclohexanol under the action of the zeolite molecular sieve catalyst at the temperature of 120-130 ℃ and under the condition of 0.5-0.6 MPaG, and the zeolite molecular sieve catalyst for catalyzing cyclohexene to generate cyclohexanol is commonly called a 'hydration catalyst'.
In the process of generating cyclohexanol by cyclohexene hydration reaction, the separation and recovery of hydration catalyst are very important. If the separation of the hydration catalyst is not complete, the waste of the hydration catalyst is caused, and in addition, the hydration catalyst can cause side reactions of cyclohexanol and cyclohexene in a post-system.
Such as dehydration of cyclohexanol to cyclohexene:
such as isomerization of cyclohexene to methylcyclopentene:
at present, the hydration catalyst consumption of a cyclohexanol production device is mostly 0.2-0.25 kg/t (cyclohexanol), for example, a cyclohexanol device producing 20 ten thousand tons per year consumes about 120-150 kg of the hydration catalyst per day and about 40-50 t of the hydration catalyst per year, if the hydration catalyst is not recycled, a large amount of waste of the hydration catalyst is caused, the generation of a reverse reaction is caused, the conversion rate of the device is reduced, the increase of a byproduct methylcyclopentene is caused, and the yield of the device is reduced.
Therefore, how to design a device capable of efficiently separating and recovering the hydration catalyst is a problem to be solved by those skilled in the art.
Disclosure of Invention
The utility model aims at the not enough of prior art, provide a separation recovery unit of hydration catalyst in cyclohexene hydration product, its simple structure, running cost are low, can effectively separate and retrieve target product and hydration catalyst in the cyclohexene hydration reaction product.
Realize the technical scheme of the utility model is, a separation recovery unit of hydration catalyst in cyclohexene hydration product, including separator, cooler to and the cyclohexene extraction tower, the reaction product access connection inlet pipe of separator for be connected with the hydration reactor, the light phase export of separator is used for being connected with the cyclohexanol knockout tower, and the heavy phase export of separator is through the cooler, to the cyclohexene extraction tower feed.
The separator comprises a separator tank body, the separator tank body is of a horizontal cylindrical structure, two ends of the separator tank body are sealed, a reaction product inlet is formed in the middle of one end of the separator tank body, a light phase outlet is formed in the top of the other end of the separator tank body, a heavy phase outlet is formed in the bottom of the other end of the separator tank body, a liquid baffle and a coalescing mechanism are arranged in an inner cavity of the separator tank body, the liquid baffle is of an L-shaped structure, the horizontal edge of the liquid baffle of the L-shaped structure is fixed to one end of the separator tank body and located above the reaction product inlet, the vertical edge of the liquid baffle of the L-shaped structure corresponds to the reaction product inlet and is provided with a gap to form a buffer space, the coalescing mechanism is located in the middle of the inner cavity of the separator tank body and comprises a plurality of coalescing plates bent in a zigzag shape, the bending direction of each coalescing plate extends along the length of the separator tank body, an included angle α between the plane of each coalescing plate and the heavy vertical line is 10-80 degrees, the coalescing plates are arranged in parallel and are provided with a gap distance, the upper end of each coalescing plate is the same as the inner wall of the separator tank body, the zigzag plate, the lower end of each coalescing plate is larger than the distance of the adjacent two H-channel walls, and.
The coalescence mechanism further comprises a plurality of support threaded rods which are arranged in parallel, and a plurality of limiting nuts which are in threaded fit on the support threaded rods, the support threaded rods vertically penetrate through the coalescence plates, and the positions of the coalescence plates are limited by the limiting nuts.
And a water replenishing port is arranged on the feeding pipe.
Adopt above-mentioned technical scheme to have following beneficial effect:
1. the device for separating and recovering the hydration catalyst in the cyclohexene hydration product comprises a separator, a cooler and a cyclohexene extraction tower, wherein the separator is used for separating a light phase and a heavy phase in the cyclohexene hydration reaction product, the main component of the light phase is cyclohexanol, a small amount of cyclohexene and water, the main component of the heavy phase is water, a small amount of hydration catalyst and impurities, and the cooler is used for reducing the temperature of the heavy phase and ensuring that the cyclohexene extraction tower is extracted in a full liquid state. The reaction product inlet of the separator is connected with a feeding pipe and used for being connected with a hydration reactor, a light phase outlet of the separator is used for being connected with a cyclohexanol separation tower, a heavy phase outlet of the separator supplies materials to a cyclohexene extraction tower through a cooler, the hydration product produced by the hydration reactor enters the separator through the feeding pipe, is washed, separated and finally layered, the light phase is discharged from the light phase outlet and enters the cyclohexanol separation tower for further separation and purification of the product, the heavy phase is discharged from the heavy phase outlet, and after being cooled and kept constant through the cooler, the heavy phase enters the cyclohexene extraction tower to extract cyclohexene therein, and the hydration catalyst is intercepted.
2. The utility model discloses a separator includes the separator jar body, the separator jar body is horizontal cylindrical structure, and both ends are sealed, the separator jar body's one end middle part sets up the reaction product import, the separator jar body's other end top sets up the light phase export, the bottom of other end sets up the heavy phase export, the hydration product gets into the inner chamber of separator jar body by the one end of separator jar body, along horizontal displacement to the other end, and separate gradually, discharge in other end layering, be equipped with liquid baffle, coalescence mechanism in the separator jar body's inner chamber, liquid baffle is L-shaped structure, the horizontal limit of liquid baffle that is L-shaped structure is fixed at separator jar body one end, be located the reaction product import, be above the coalescence product import, and have the interval, form the buffer space, the hydration product that gets into separator jar body cavity strikes on the vertical limit of liquid baffle, the speed reduction moves towards the separator jar body other end slowly after the coalescence board, in coalescence displacement process, the coalescence board, the layering accounts for the ratio of the liquid that the coalescence board is more the liquid moves to the vertical limit of the lift-up liquid baffle, the lift-up lift-down lift-up lift-down lift-up lift-down lift-up lift-up lift-down lift-up lift-down-up lift-down lift-up lift-down-up lift-up lift-up lift-down-up lift-down-up lift-up lift-down-up-lift-down-lift-down-up-down-lift-down-up-down-lift-down-up-down-up-down.
The following further description is made with reference to the accompanying drawings and detailed description.
Drawings
Fig. 1 is a schematic connection diagram of the present invention;
FIG. 2 is a schematic structural view of the separator of the present invention;
FIG. 3 is a distribution diagram of the gathering mechanism of the present invention;
fig. 4 is a cross-sectional view of the separator of the present invention;
fig. 5 is a schematic view of the arrangement of the coalescence plates according to the present invention.
In the drawing, 1 is a separator, 1a is a reaction product inlet, 1b is a light phase outlet, 1c is a heavy phase outlet, 11 is a separator tank, 12 is a liquid baffle, 13 is a coalescing mechanism, 14 is a buffer space, 15 is a coalescing plate, 16 is a liquid flow channel, 2 is a cooler, 5 is a feed pipe, 5a is a water replenishing port, and 7 is a cyclohexene extraction tower.
Detailed Description
The utility model discloses in, do not mark the equipment of concrete connection mode, go on according to conventional condition or according to the condition of firm suggestion usually, do not mark the equipment of specific model, be the conventional equipment in chemical industry field usually.
Referring to fig. 1 to 5, the present invention relates to a device for separating and recovering a hydrated catalyst from a cyclohexene hydrate product, comprising a separator 1, a cooler 2, and a cyclohexene extraction column 7, wherein a reaction product inlet 1a of the separator 1 is connected to a feed pipe 5 for connection to the hydration reactor, specifically, a water replenishment port 5a is provided on the feed pipe 5, a light phase outlet 1b of the separator 1 is for connection to the cyclohexanol separation column, a heavy phase outlet 1c of the separator 1 is fed to the cyclohexene extraction column via the cooler 2, in this embodiment, the separator 1 comprises a separator tank 11, the separator tank 11 is a horizontally disposed coalescent cylindrical structure, and both ends of the coalescent cylindrical structure are sealed, typically, both ends of the separator tank are sealed by screw-fitting end caps, which facilitates mounting and dismounting, and mounting of the separator tank 11, the reaction product inlet 1a is provided in the middle of one end thereof, the separator tank 11 is provided with a coalescent coalescence coalescing outlet 1b at the top of the other end thereof, the heavy phase outlet 1c at the bottom thereof, the separation tank is provided with a screw-fitting end cap at the bottom thereof, the separation tank 11 is provided with a retention plate 14, which is provided in the same height as a retention plate 15, and a retention plate 15, which is provided with a retention plate 15, which is provided in the same as a retention plate 15, which is provided with a retention plate 15, and a retention plate 15, which is provided in the retention plate 15, and a retention plate 15, which is provided in the same vertical direction as a retention plate 15, and a retention plate 15, which is provided with a retention plate 15, which is provided in the same as a retention plate, and a retention plate, which is provided in the same vertical direction as a retention plate 15, and a retention plate 15, which is provided in the same as a retention plate, and a retention plate which is provided in the same as a retention plate, and which is provided in the vertical direction as a retention plate, and which is provided with a retention plate 15, and which is provided in the vertical direction, and a retention plate which is provided in the vertical direction as a retention plate, and which is provided in the vertical direction, and which is provided in which is provided with a vertical direction, and which is provided with a retention plate.
The step of separating and recovering the hydration catalyst by the separation and recovery device comprises the following steps:
1) introducing the cyclohexene hydration reaction product into a separator through a feed pipe, wherein the temperature of the cyclohexene hydration reaction product is 125 ℃, the pressure is 0.55MPa, and supplementing desalted water with one fiftieth volume (flow) of the hydration reaction product through a water supplementing port for 32 min;
2) the light phase discharged from the light phase outlet of the separator enters a cyclohexanol separation tower, and the heavy phase discharged from the heavy phase outlet of the separator is cooled to 60 ℃ by a cooler and enters a cyclohexene extraction tower;
3) controlling the working temperature of the cyclohexene extraction tower to be less than 80 ℃ and normal pressure, recovering cyclohexanol from the top of the cyclohexene extraction tower to be used as a raw material, and discharging a mixture containing a hydration catalyst from the bottom of the cyclohexene extraction tower for recycling or waste treatment.
Claims (4)
1. A device for separating and recovering a hydration catalyst in cyclohexene hydration products is characterized in that: comprises a separator (1), a cooler (2) and a cyclohexene extraction tower (7),
the reaction product inlet (1a) of the separator (1) is connected with the feeding pipe (5) and is used for being connected with the hydration reactor, the light phase outlet (1b) of the separator (1) is used for being connected with the cyclohexanol separation tower, and the heavy phase outlet (1c) of the separator (1) supplies materials to the cyclohexene extraction tower (7) through the cooler (2).
2. The device for separating and recovering the hydrated catalyst in the cyclohexene hydration product according to claim 1, characterized in that the separator (1) comprises a separator tank body (11), the separator tank body (11) is of a horizontal cylindrical structure and is sealed at two ends, a reaction product inlet (1a) is arranged in the middle of one end of the separator tank body (11), a light phase outlet (1b) is arranged at the top of the other end of the separator tank body (11), a heavy phase outlet (1c) is arranged at the bottom of the other end, a liquid baffle (12) and a coalescing mechanism (13) are arranged in the inner cavity of the separator tank body (11), the liquid baffle (12) is of an L-shaped structure, the horizontal edge of the liquid baffle (12) of the L-shaped structure is fixed at one end of the separator tank body (11), the liquid baffle (12) is positioned above the reaction product inlet (1a), the vertical edge of the liquid baffle (12) of the L-shaped structure corresponds to the reaction product inlet (1a), the coalescing mechanism has a coalescing interval to form a buffer space (14), the coalescing mechanism (13) is positioned at one end of the middle of the inner cavity of the separator tank body (11), the inner wall of the serrated structure (11), the zigzag structure is bent at a distance between two adjacent separating plates (15), the inner wall (15) and the inner wall (15) is formed by a distance H, the distance between the two adjacent separating plates (15) and the inner wall (15) which is greater than the length (15), the length (10) of the separating tank body (15), the inner wall (10) of the separating tank body (10) and the separating tank body (10).
3. The apparatus for separating and recovering a hydration catalyst in cyclohexene hydration product according to claim 2, characterized in that: the coalescence mechanism (13) also comprises a plurality of support threaded rods which are arranged in parallel, and a plurality of limiting nuts which are in threaded fit on the support threaded rods, wherein the support threaded rods vertically penetrate through the coalescence plates (15), and the positions of the coalescence plates (15) are limited by the limiting nuts.
4. The apparatus for separating and recovering a hydration catalyst in cyclohexene hydration product according to claim 1, wherein: and a water replenishing port (5a) is arranged on the feeding pipe (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201921218261.5U CN210331749U (en) | 2019-07-30 | 2019-07-30 | Separation recovery unit of hydration catalyst in cyclohexene hydration product |
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| CN201921218261.5U CN210331749U (en) | 2019-07-30 | 2019-07-30 | Separation recovery unit of hydration catalyst in cyclohexene hydration product |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110302557A (en) * | 2019-07-30 | 2019-10-08 | 河南永新科技有限公司 | The separating and reclaiming device and technique of cyclohexene hydration water in products conjunction catalyst |
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2019
- 2019-07-30 CN CN201921218261.5U patent/CN210331749U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110302557A (en) * | 2019-07-30 | 2019-10-08 | 河南永新科技有限公司 | The separating and reclaiming device and technique of cyclohexene hydration water in products conjunction catalyst |
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