Alkane-olefin separation device and efficient alpha-olefin purification equipment applying same

Abstract

The utility model discloses an alkane-olefin separation device and efficient alpha-olefin purification equipment applying the alkane-olefin separation device, and belongs to the technical field of fine chemical engineering. The alkane-olefin separation device is used for efficiently purifying alpha-olefin equipment, the alkane-olefin separation device comprises a simulated moving bed, an alkane-olefin separation raffinate unit and an alkane-olefin separation extract unit, and the simulated moving bed is connected with the alkane-olefin separation raffinate unit and the alkane-olefin separation extract unit respectively. The alkane-olefin separation raffinate unit is communicated with the top of the deoxidation adsorption tower, and the alkane-olefin separation extract unit is communicated with the efficient alpha-olefin purification equipment. The alkane-olefin separation device is used for separating alkane into raffinate and extract, so that the raffinate can be recycled when the alkane-olefin separation device is applied to the efficient alpha-olefin purification equipment, and the yield of the prepared alpha-olefin is improved; and the alkane-olefin separation device reduces idling of efficient alpha-olefin purification equipment and keeps the working condition of the whole equipment stable.

Description

Technical Field

[0001] The utility model belongs to the technical field of fine chemical industry, and specifically relates to an alkane-olefin separation device and high-efficiency alpha-olefin purification equipment using the same. Background Art

[0002] In the existing simulated moving bed, in the alkane-olefin separation step, the alkane-rich product obtained after separation contains olefins. This part of the olefins is not recycled, but is processed along with the alkanes, resulting in olefin losses and affecting the overall α-olefin yield of the process.

[0003] If a single desorbent is used to fill the deoxygenation adsorption tower in the adsorption deoxygenation section, since the desorbent is an organic solvent, a large amount of it is consumed during the adsorption process, which has an impact on the environment. In addition, using a single desorbent to fill the tower will cause subsequent process equipment to idle, such as the alkane-olefin separation extract tower and the alkane-olefin separation residual liquid tower, resulting in energy consumption. The system operating conditions are difficult to stabilize. Utility Model Content

[0004] The utility model aims to provide an alkane-olefin separation device and a highly efficient alpha-olefin purification device using the same, which solves the problems of reduced alpha-olefin yield and difficulty in stabilizing the entire olefin purification working condition in the prior art.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is implemented as follows: an alkane-olefin separation device is used for an efficient purification of α-olefin equipment, the alkane-olefin separation device includes a simulated moving bed, an alkane-olefin separation raffinate unit and an alkane-olefin separation extract unit, the simulated moving bed is connected to the alkane-olefin separation raffinate unit and the alkane-olefin separation extract unit respectively, the alkane-olefin separation raffinate unit is connected to the adsorption deoxygenation device in the efficient purification of α-olefin equipment, and the alkane-olefin separation extract unit is connected to the refining device in the efficient purification of α-olefin equipment.

[0006] In some embodiments, the alkane-olefin separation raffinate unit includes an alkane-olefin separation raffinate mixing tank, an alkane-olefin separation raffinate tower, a raffinate tower top reflux tank, a product buffer tank and a desorbent buffer tank; the alkane-olefin separation raffinate tower is provided with a first feed port and a second feed port, the alkane-olefin separation raffinate mixing tank is connected with the first feed port, the raffinate tower top reflux tank is connected with the top of the alkane-olefin separation raffinate tower and forms reflux through the second feed port, the raffinate tower top reflux tank is connected with the product buffer tank, the alkane-olefin separation raffinate tower bottom is connected with the desorbent buffer tank, and the product buffer tank and the desorbent buffer tank are both connected with the adsorption deoxygenation device of the high-efficiency purification of α-olefin equipment.

[0007] In some embodiments, the alkane-olefin separation extract unit includes an alkane-olefin separation extract mixing tank, an alkane-olefin separation extract tower and an extract tower top reflux tank. The alkane-olefin separation extract mixing tank is provided with the alkane-olefin separation extract tower and is provided with a third feed port and a fourth feed port. The alkane-olefin separation extract mixing tank is connected with the third feed port, the extract tower top reflux tank is connected with the top of the alkane-olefin separation extract tower and forms reflux through the fourth feed port, the extract tower top reflux tank is connected with the refining device of the high-efficiency purification of α-olefins equipment, and the bottom of the alkane-olefin separation extract tower is connected with the analytical agent buffer tank.

[0008] Another technical solution of the utility model is achieved as follows: an efficient purification device for α-olefins, comprising the alkane-olefin separation device, a pretreatment device, an adsorption deoxygenation device, and a refining device, wherein the pretreatment device pretreats the raw material and sequentially connects the adsorption deoxygenation device, the alkane-olefin separation device and the refining device.

[0009] In some embodiments, the pretreatment device includes a raw material tank, a pretreatment section connected to the raw material tank, and a fraction cutting section connected to the pretreatment section, and the discharge port of the fraction cutting section is connected to the adsorption deoxygenation device.

[0010] In some embodiments, the adsorption deoxygenation device includes a deoxygenation buffer tank, at least one deoxygenation adsorption tower connected to the bottom of the deoxygenation buffer tank, and an alkane-olefin separation feed buffer tank connected to the bottom of the deoxygenation adsorption tower, the bottom of the alkane-olefin separation feed buffer tank is connected to the simulated moving bed, and the top of the deoxygenation adsorption tower is connected to the alkane-olefin separation raffinate extraction unit.

[0011] In some embodiments, the refining device includes an isoolefin separation unit and an α-olefin product collecting tank, one end of the isoolefin separation unit is connected to the extract tower top reflux tank, and the other end of the isoolefin separation unit is connected to the α-olefin product collecting tank.

[0012] In some embodiments, the bottom of the alkane-olefin separation raffinate tower and the bottom of the alkane-olefin separation extracted liquid tower are both provided with reflux pipes to the tower body.

[0013] In some embodiments, pumps are provided on the pipeline connecting the deoxygenation buffer tank and the deoxygenation adsorption tower and on the pipeline between the tank bottom of the alkane-olefin separation feed buffer tank and the alkane-olefin separation device.

[0014] In some embodiments, the pipelines connecting the product buffer tank and the analytical agent buffer tank to the top of the deoxygenation adsorption tower are both provided with pumps; and the pipeline connecting the bottom of the alkane-olefin separation extract tower to the analytical agent buffer tank is provided with a pump.

[0015] Compared with the prior art, the alkane-olefin separation device in the utility model separates alkanes and olefins and divides them into raffinate and extract, so that the alkane-olefin separation device can be used for high-efficiency purification of α-olefin equipment to recover the raffinate, thereby improving the yield of the prepared α-olefin, and the alkane-olefin separation device reduces the idling of the high-efficiency purification of α-olefin equipment to maintain the stable operating condition of the entire equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a highly efficient α-olefin purification device provided in an embodiment of the utility model.

[0017] In the figure, 1. Alkane-olefin separation device, 11. Simulated moving bed, 12. Alkane-olefin separation raffinate unit, 121. Alkane-olefin separation raffinate mixing tank, 122. Alkane-olefin separation raffinate tower, 1221. First feed inlet, 1222. Second feed inlet, 123. Raffinate tower top reflux tank, 124. Product buffer tank, 125. Analyzer buffer tank, 13. Alkane-olefin separation extract unit, 131. Alkane-olefin separation extract mixing tank, 132. Alkane-olefin separation extract tower, 1321. Third feed inlet, 1322. Fourth feed inlet, 133. Extract tower top reflux tank, 2. Pretreatment device, 21. Raw material tank, 22. Pretreatment section, 23. Fraction cutting section, 3. Adsorption deoxygenation device, 31. Deoxygenation buffer tank, 32. Deoxygenation adsorption tower, 33. Alkane-olefin separation feed buffer tank, 4. Refining device, 41. Isoolefin separation unit, 42. α-olefin product collection tank. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with specific embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0019] In the description of the present utility model, it should be clarified that the terms "vertical", "lateral", "longitudinal", "front", "rear", "left", "right", "up", "down", "horizontal" and the like indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model, and do not mean that the device or element referred to must have a specific orientation or position, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0020] Example 1

[0021] The alkane-olefin separation device provided in Example 1 of the utility model is used for an efficient purification device for α-olefins. The alkane-olefin separation device 1 comprises a simulated moving bed 11, an alkane-olefin separation raffinate unit 12 and an alkane-olefin separation extract unit 13. The simulated moving bed 11 is connected to the alkane-olefin separation raffinate unit 12 and the alkane-olefin separation extract unit 13 respectively. The alkane-olefin separation raffinate unit 12 is connected to the adsorption deoxygenation device 3 in the efficient purification device for α-olefins. The alkane-olefin separation extract unit 13 is connected to the refining device 4 in the efficient purification device for α-olefins.

[0022] After adopting the above scheme, the alkane-olefin separation device 1 separates the alkane-olefins and divides them into a raffinate and an extract, so that the alkane-olefin separation device 1 can be used for the high-efficiency purification of α-olefins equipment to recover the raffinate, thereby improving the yield of the prepared α-olefins, and the alkane-olefin separation device 1 reduces the idling of the high-efficiency purification of α-olefins equipment to maintain the stability of the entire equipment operating condition.

[0023] In addition, the simulated moving bed 11 performs alkane-olefin separation, and the components after separation are olefin-rich components and olefin-poor components, wherein the extract (olefin-rich component) enters the alkane-olefin separation extract unit 13 for treatment, and the raffinate (olefin-poor component) enters the alkane-olefin separation raffinate unit 12 for treatment.

[0024] In the specific implementation process of this embodiment 1, as Figure 1 As shown, the alkane-olefin separation raffinate unit 12 includes an alkane-olefin separation raffinate mixing tank 121, an alkane-olefin separation raffinate tower 122, a raffinate tower top reflux tank 123, a product buffer tank 124 and a desorbent buffer tank 125; the alkane-olefin separation raffinate tower 122 is provided with a first feed port 1221 and a second feed port 1222, the alkane-olefin separation raffinate mixing tank 121 is connected with the first feed port 1221, the raffinate tower top reflux tank 123 is connected with the top of the alkane-olefin separation raffinate tower 122 and forms reflux through the second feed port 1222, the raffinate tower top reflux tank 123 is connected with the product buffer tank 124, the bottom of the alkane-olefin separation raffinate tower 122 is connected with the desorbent buffer tank 125, and the product buffer tank 124 and the desorbent buffer tank 125 are both connected with the top of the deoxygenation adsorption tower 32.

[0025] In the specific implementation process of this embodiment 1, as Figure 1As shown, the alkane-olefin separation extract unit 13 includes an alkane-olefin separation extract mixing tank 131, an alkane-olefin separation extract tower 132 and an extract tower top reflux tank 133. The alkane-olefin separation extract tower 132 is provided with a third feed port 1321 and a fourth feed port 1322. The alkane-olefin separation extract mixing tank 131 is connected to the third feed port 1321, the extract tower top reflux tank 133 is connected to the top of the alkane-olefin separation extract tower 132 and forms reflux through the fourth feed port 1322, the extract tower top reflux tank 133 is connected to the refining device 4, and the bottom of the alkane-olefin separation extract tower 132 is connected to the analytical agent buffer tank 125.

[0026] More specifically, the separation desorbent enters the analytical agent buffer tank 125 through a pipeline, the raffinate (olefin-poor component) enters the alkane-olefin separation raffinate mixing tank 121, the alkane-olefin separation raffinate mixing tank 121 enters the middle section of the tower body of the alkane-olefin separation raffinate tower 122 from the pipeline through the first feed port 1221, the raffinate (olefin-poor component) passes through the alkane-olefin separation raffinate tower 122, the olefin-poor component is separated from the desorbent, the olefin-poor component enters the raffinate tower top reflux tank 123 from the top of the alkane-olefin separation raffinate tower 122 through a pipeline, a part of the raffinate tower top reflux tank 123 refluxes from the pipeline through the first feed port 1221 into the alkane-olefin separation raffinate tower 122, and the other part enters the product buffer tank 124 through a pipeline; the desorbent enters the analytical agent buffer tank 125 from the bottom of the alkane-olefin separation raffinate tower 122 through a pipeline, wherein the product buffer tank 124 and the analytical agent buffer tank 125 are The flushing tank 125 is connected to the top of the deoxygenation adsorption tower 32 through pipelines, and the top product alkanes and part of the unrecovered olefins in the product buffer tank 124 and the desorbent buffer tank 125 are used to fill the deoxygenation adsorption tower 32 instead of the original pure desorbent, so that the alkanes and olefins at the top of the alkane-olefin separation residual liquid tower 122 can be fully utilized and recovered, and the overall olefin recovery rate of the process section is improved; the extract (olefin-rich component) enters the alkane-olefin separation extract mixing tank 131, and enters the middle section of the tower body of the alkane-olefin separation extract tower 132 from the third feed port 1321 through the pipeline, passes through the alkane-olefin separation extract tower 132, and the olefins are separated from the desorbent, and the olefins enter the extract tower top reflux tank 133 from the top of the alkane-olefin separation extract tower 132 through the pipeline, a part of it refluxes from the pipeline through the fourth feed port 1322 into the alkane-olefin separation extract tower 132, and the other part enters the refining device 4 through the pipeline.

[0027] The workflow provided by Example 1 of the present invention is as follows: the simulated moving bed 11 is used for alkane-olefin separation, and the separated raw materials are divided into olefin-rich components and olefin-poor components, wherein the raffinate (olefin-poor component) enters the alkane-olefin separation raffinate mixing tank 121, and the alkane-olefin separation raffinate mixing tank 121 enters the middle section of the tower body of the alkane-olefin separation raffinate tower 122 from the pipeline through the first feed inlet 1221, and the raffinate (olefin-poor component) passes through the alkane-olefin separation raffinate tower 122, and the olefin-poor component is mixed with the desorbent. The olefin-poor component enters the reflux tank 123 at the top of the alkane-olefin separation raffinate tower 122 through a pipeline, and a part of the reflux tank 123 at the top of the raffinate tower 123 refluxes from the pipeline through the first feed port 1221 into the alkane-olefin separation raffinate tower 122, and the other part enters the product buffer tank 124 through a pipeline; the desorbent enters the desorbent buffer tank 125 from the bottom of the alkane-olefin separation raffinate tower 122 through a pipeline, wherein the product buffer tank 124 and the desorbent buffer tank 125 are connected. 5 are connected to the top of the deoxygenation adsorption tower 32 through pipelines, and the top product alkanes and part of the unrecovered olefins in the product buffer tank 124 and the desorbent buffer tank 125 are used to fill the deoxygenation adsorption tower 32 instead of the original pure desorbent, so that the alkanes and olefins at the top of the alkane-olefin separation residual liquid tower 122 can be fully utilized and recovered, thereby improving the overall olefin recovery rate of the process section; the extract (olefin-rich component) enters the alkane-olefin separation extract mixing tank 131, and enters the third feed port 1321 through the pipeline. The olefins and the desorbent are separated through the middle section of the tower body of the alkane-olefin separation extract tower 132. The separated desorbent enters the desorbent buffer tank 125 from the bottom of the alkane-olefin separation extract tower 132 through a pipeline. The olefins enter the extract tower top reflux tank 133 from the top of the alkane-olefin separation extract tower 132 through a pipeline. A part of it refluxes from the pipeline through the fourth feed port 1322 into the alkane-olefin separation extract tower 132, and the other part enters the refining device 4 through a pipeline.

[0028] Example 2

[0029] The high-efficiency purification device of α-olefins provided in Example 2 of the utility model comprises the alkane-olefin separation device 1, the pretreatment device 2, the adsorption deoxygenation device 3, and the refining device 4 of Example 1, wherein the pretreatment device 2 pretreats the raw material and is sequentially connected to the adsorption deoxygenation device 3, the alkane-olefin separation device 1 and the refining device 4.

[0030] After adopting the above scheme, the high-efficiency α-olefin purification equipment pre-treats the raw materials, then performs adsorption deoxygenation through the adsorption deoxygenation device 3, performs alkane olefin separation through the alkane olefin separation device 1, and then collects the separated products. The α-olefin yield of the equipment is improved, the idling of the equipment is reduced, and the operating condition of the entire equipment can be maintained stable.

[0031] In the specific implementation process of this embodiment 2, as Figure 1As shown, the pretreatment device 2 includes a raw material tank 21, a pretreatment section 22 connected to the raw material tank 21, and a fraction cutting section 23 connected to the pretreatment section 22, and the discharge port of the fraction cutting section 23 is connected to the adsorption deoxygenation device 3.

[0032] More specifically, the raw material is stored in a raw material tank 21 and flows to a pretreatment section 22 via a pipeline. The pretreatment section 22 pretreats the raw material and then flows to a fraction cutting section 23 via a pipeline. The fraction cutting section 23 splits the fraction and the fraction flows to the adsorption deoxygenation device 3 via a pipeline.

[0033] In the specific implementation process of this embodiment 2, as Figure 1 As shown, the adsorption deoxygenation device 3 includes a deoxygenation buffer tank 31, at least one deoxygenation adsorption tower 32 connected to the bottom of the deoxygenation buffer tank 31, and an alkane-olefin separation feed buffer tank 33 connected to the bottom of the deoxygenation adsorption tower 32, the bottom of the alkane-olefin separation feed buffer tank 33 is connected to the simulated moving bed 11, and the top of the deoxygenation adsorption tower 32 is connected to the alkane-olefin separation raffinate extraction unit 12.

[0034] More specifically, the fraction cutting section 23 divides the fraction into the deoxygenation buffer tank 31, and enters the top of the deoxygenation adsorption tower 32 from the upper end through the pipeline. The adsorption deoxygenation device 3 includes at least one deoxygenation adsorption tower 32. There are two deoxygenation adsorption towers 32 in the figure of this embodiment. After the high-load operation of one deoxygenation adsorption tower 32, the other deoxygenation adsorption tower 32 can be switched to ensure the continuous operation of the entire equipment. After deoxygenation adsorption, the deoxygenated raw material enters the alkane-olefin separation feed buffer tank 33 from the bottom of the deoxygenation adsorption tower 32 through the pipeline. In other embodiments, the deoxygenation adsorption tower 32 can be set to more than two, and can also be switched to operate.

[0035] In addition, the original simulated moving bed alkane-olefin separation process directly processes the olefins mixed in the alkane product, causing losses and affecting the yield. The equipment of the utility model can effectively recover the olefins contained in the alkane-rich product obtained by separation, thereby improving the overall process olefin yield. Using pure desorbent to fill the adsorption deoxygenation tower causes a large amount of desorbent to be consumed, which affects the environment. The equipment of the utility model adds a product buffer tank 124 after the raffinate tower top reflux tank 123 in the alkane-olefin separation step, and connects it to the top of the deoxygenation adsorption tower 32 through a pipeline, replacing the original single desorbent feed pipe, so that the alkanes and olefins in the raffinate tower top reflux tank 123 can be fully utilized and recovered, thereby improving the overall olefin recovery rate of the process section; in addition, it can also avoid the problem of idling of subsequent process equipment after the pure desorbent is filled in the tower when the deoxygenation adsorption tower is filled with a single desorbent, such as the idling of the alkane-olefin separation extract tower 132 and the alkane-olefin separation raffinate tower 122. This improvement can effectively stabilize the overall equipment operating conditions, save energy consumption, efficiently and reasonably utilize process equipment, improve product purity, efficiently recover olefins, improve the overall product yield, and avoid consumption caused by equipment idling. The equipment is simple, has low energy consumption, good separation effect, high product yield, small impact on the environment, and low cost, and realizes efficient separation of olefins and alkanes.

[0036] In the specific implementation process of this embodiment 2, as Figure 1 As shown, the refining device 4 includes an isoolefin separation unit 41 and an α-olefin product collecting tank 42 , one end of the isoolefin separation unit 41 is connected to the extract tower top reflux tank 133 , and the other end of the isoolefin separation unit 41 is connected to the α-olefin product collecting tank 42 .

[0037] More specifically, the isoolefin separation unit 41 is connected to the extract tower top reflux tank 133, so that the α-olefin finally prepared has higher purity and higher yield.

[0038] In the specific implementation process of this embodiment 2, as Figure 1 As shown, the bottom of the alkane-olefin separation raffinate tower 122 and the bottom of the alkane-olefin separation extract tower 132 are both provided with reflux pipes to the tower bodies.

[0039] More specifically, the bottom of the alkane-olefin separation raffinate tower 122 and the bottom of the alkane-olefin separation extract tower 132 are both provided with reflux pipes to the tower body, which further ensures that the olefin components are fully utilized and recovered, thereby improving the overall recovery rate of the process section.

[0040] In the specific implementation process of this embodiment 2, as Figure 1 As shown, pumps are provided on the pipeline connecting the deoxygenation buffer tank 31 and the deoxygenation adsorption tower 32 and on the pipeline between the tank bottom of the alkane-olefin separation feed buffer tank 33 and the alkane-olefin separation device 1 .

[0041] In the specific implementation process of this embodiment 2, as Figure 1 As shown, the product buffer tank 124 and the analytical agent buffer tank 125 are both provided with pumps on the pipelines connected to the top of the deoxygenation adsorption tower 32; and the alkane-olefin separation extract tower 132 is provided with a pump on the pipeline connected to the analytical agent buffer tank 125 at the bottom.

[0042] More specifically, a pump is provided in the pipeline to compensate for the lack of power in the pipeline flow of the liquid to the set tank and the set tower, thereby making the α-olefin purification process more efficient. In addition, in other embodiments, the location of the pump can also be set as needed.

[0043] The workflow provided by Example 2 of the present utility model is as follows: the raw materials in the raw material tank 21 enter the deoxygenation buffer tank 31 after the pretreatment section 22 and the fraction cutting section 23, and enter the deoxygenation adsorption tower 32 through the pipeline from the top of the tower (more than two deoxygenation adsorption towers 32 are switched to ensure the continuous operation of the process). After deoxygenation adsorption, the deoxygenated raw materials enter the alkane-olefin separation feed buffer tank 33 from the lower end of the adsorption tower through a pipeline, and enter the simulated moving bed 11 through a pipeline for alkane-olefin separation. The separated raw materials are divided into olefin-rich components and olefin-poor components, wherein the raffinate (olefin-poor component) enters the alkane-olefin separation raffinate mixing tank 121, and the alkane-olefin separation raffinate mixing tank 121 enters the middle section of the tower body of the alkane-olefin separation raffinate tower 122 from the pipeline through the first feed port 1221. The raffinate (olefin-poor component) passes through the alkane-olefin separation raffinate mixing tank 121. The olefin-poor component is separated from the desorbent in the separation raffinate tower 122. The olefin-poor component enters the raffinate tower top reflux tank 123 from the top of the alkane-olefin separation raffinate tower 122 through a pipeline. A part of the raffinate tower top reflux tank 123 refluxes from the pipeline through the first feed port 1221 into the alkane-olefin separation raffinate tower 122, and the other part enters the product buffer tank 124 through a pipeline; the desorbent enters the desorbent buffer tank 125 from the bottom of the alkane-olefin separation raffinate tower 122 through a pipeline, wherein the product buffer tank The top of the deoxygenation adsorption tower 32 is connected to the desorbent buffer tank 124 and the desorbent buffer tank 125 through pipelines, and the top product alkane and part of the unrecovered olefins in the product buffer tank 124 and the desorbent buffer tank 125 are used to fill the deoxygenation adsorption tower 32 instead of the original pure desorbent, so that the top alkane and olefins of the alkane-olefin separation residual liquid tower 122 can be fully utilized and recovered, thereby improving the overall olefin recovery rate of the process section; the extract (olefin-rich component) enters the alkane-olefin separation extract mixing tank 131, and is fed from the third feed port through a pipeline. 1321 enters the middle section of the tower body of the alkane-olefin separation extract tower 132, passes through the alkane-olefin separation extract tower 132, olefins are separated from the desorbent, the separated desorbent enters the desorbent buffer tank 125 from the bottom of the alkane-olefin separation extract tower 132 through a pipeline, olefins enter the extract tower top reflux tank 133 from the top of the alkane-olefin separation extract tower 132 through a pipeline, a part of it refluxes from the pipeline into the alkane-olefin separation extract tower 132 through the fourth feed inlet 1322, and the other part enters the refining device 4 through a pipeline.

[0044] The olefin purity and yield of olefin products obtained by treating olefin products using the present equipment and the equipment in the comparative example in which the prior art does not include a product buffer tank 124 and both the product buffer tank 124 and the analytical agent buffer tank 125 are connected to the top of the deoxygenation adsorption tower 32 are compared, as shown in Table 1. The target carbon number in Table 1 is the carbon content of the olefin to be separated. It can be seen from Table 1 that the purity and yield of olefin products treated by the present equipment are significantly improved compared with the comparative example.

[0045] Table 1 Comparison of olefin purity and yield of this equipment and comparative example

[0046]

[0047]

[0048] In summary, the alkane-olefin separation device 1 of the utility model separates alkanes and olefins and divides them into raffinate and extract, so that the alkane-olefin separation device 1 can be used for the high-efficiency purification of α-olefin equipment to recover the raffinate, thereby improving the yield of the prepared α-olefin, and the alkane-olefin separation device 1 reduces the idling of the high-efficiency purification of α-olefin equipment to maintain the stability of the entire equipment operating condition.

[0049] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An alkane-olefin separation device for efficiently purifying α-olefins, characterized in that: The alkane-olefin separation device (1) comprises a simulated moving bed (11), an alkane-olefin separation raffinate unit (12) and an alkane-olefin separation extract unit (13); the simulated moving bed (11) is connected to the alkane-olefin separation raffinate unit (12) and the alkane-olefin separation extract unit (13), respectively; the alkane-olefin separation raffinate unit (12) is connected to an adsorption deoxygenation device (3) in the high-efficiency α-olefin purification device; and the alkane-olefin separation extract unit (13) is connected to a refining device (4) in the high-efficiency α-olefin purification device.

2. The alkane-olefin separation device according to claim 1, characterized in that: The alkane-olefin separation raffinate unit (12) comprises an alkane-olefin separation raffinate mixing tank (121), an alkane-olefin separation raffinate tower (122), a raffinate tower top reflux tank (123), a product buffer tank (124) and a desorbent buffer tank (125); the alkane-olefin separation raffinate tower (122) is provided with a first feed inlet (1221) and a second feed inlet (1222); the alkane-olefin separation raffinate mixing tank (121) is connected to the first feed inlet (1221); the raffinate tower top is connected to the first feed inlet (1222); The reflux tank (123) is connected to the top of the alkane-olefin separation raffinate tower (122) and forms a reflux through the second feed port (1222); the reflux tank (123) at the top of the raffinate tower is connected to the product buffer tank (124); the bottom of the alkane-olefin separation raffinate tower (122) is connected to the desorbent buffer tank (125); and both the product buffer tank (124) and the desorbent buffer tank (125) are connected to the adsorption deoxygenation device (3) of the high-efficiency α-olefin purification equipment.

3. The alkane-olefin separation device according to claim 2, characterized in that: The alkane-olefin separation extract unit (13) comprises an alkane-olefin separation extract mixing tank (131), an alkane-olefin separation extract tower (132) and an extract tower top reflux tank (133). The alkane-olefin separation extract mixing tank (131) is provided with a third feed inlet (1321) and a fourth feed inlet (1322) provided with the alkane-olefin separation extract tower (132). The alkane-olefin separation extract mixing tank (131) is connected to the third feed inlet (1321). The extract tower top reflux tank (133) is connected to the tower top of the alkane-olefin separation extract tower (132) and forms reflux through the fourth feed inlet (1322). The extract tower top reflux tank (133) is connected to the refining device (4) of the high-efficiency purification of α-olefins equipment. The bottom of the alkane-olefin separation extract tower (132) is connected to the analytical agent buffer tank (125).

4. An efficient purification device for α-olefins, characterized in that: The method comprises an alkane-olefin separation device (1) as claimed in any one of claims 1 to 3, a pretreatment device (2), an adsorption deoxygenation device (3), and a refining device (4), wherein the pretreatment device (2) pretreats the raw material and is sequentially connected to the adsorption deoxygenation device (3), the alkane-olefin separation device (1) and the refining device (4).

5. The high-efficiency purification device for α-olefins according to claim 4, characterized in that: The pretreatment device (2) comprises a raw material tank (21), a pretreatment section (22) connected to the raw material tank (21), and a fraction cutting section (23) connected to the pretreatment section (22), and the discharge port of the fraction cutting section (23) is connected to the adsorption deoxygenation device (3).

6. The highly efficient α-olefin purification device according to claim 4 or 5, characterized in that: The adsorption deoxygenation device (3) comprises a deoxygenation buffer tank (31), at least one deoxygenation adsorption tower (32) connected to the bottom of the deoxygenation buffer tank (31), and an alkane-olefin separation feed buffer tank (33) connected to the bottom of the deoxygenation adsorption tower (32), the bottom of the alkane-olefin separation feed buffer tank (33) being connected to the simulated moving bed (11), and the top of the deoxygenation adsorption tower (32) being connected to the alkane-olefin separation raffinate unit (12).

7. The high-efficiency purification device for α-olefins according to claim 6, characterized in that: The refining device (4) comprises an isoolefin separation unit (41) and an α-olefin product collecting tank (42), one end of the isoolefin separation unit (41) is connected to the extract tower top reflux tank (133), and the other end of the isoolefin separation unit (41) is connected to the α-olefin product collecting tank (42).

8. The highly efficient α-olefin purification device according to claim 6, characterized in that: The bottom of the alkane-olefin separation raffinate tower (122) and the bottom of the alkane-olefin separation extract tower (132) are both provided with reflux pipes to the tower body.

9. The highly efficient α-olefin purification device according to claim 6, characterized in that: Pumps are provided on the pipeline connecting the deoxygenation buffer tank (31) and the deoxygenation adsorption tower (32) and on the pipeline connecting the tank bottom of the alkane-olefin separation feed buffer tank (33) and the alkane-olefin separation device (1).

10. The highly efficient α-olefin purification device according to claim 6, characterized in that: The product buffer tank (124) and the analytical agent buffer tank (125) are both provided with pumps on the pipelines connected to the top of the deoxygenation adsorption tower (32); and the alkane-olefin separation extract tower (132) is provided with a pump on the pipeline connected to the analytical agent buffer tank (125) at the bottom of the tower.

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