An isononyl alcohol hydroformylation reactor

Abstract

The application provides an isononyl alcohol hydroformylation reactor and relates to the technical field of isononyl alcohol hydroformylation reactors.The isononyl alcohol hydroformylation reactor comprises a shell, the lower part of the shell is provided with a reactant inlet, and the upper part of the shell is provided with a reactant outlet on the side wall; a distribution device is arranged in the shell and is arranged above and spaced from the reactant inlet, and is used for uniformly distributing a gas-liquid reaction medium; a heat-removing distribution structure is arranged in the shell and is arranged above and spaced from the distribution device, and the heat-removing distribution structure comprises an inner tube box, an outer tube box, a plurality of heat exchange tubes and at least one distribution plate; the problems that there is no internal component in the gas-liquid upflow type bubbling bed reactor in the prior art, gas cannot be distributed and heat cannot be removed, and the conversion rate of the reaction is low are solved.

Description

Technical Field

[0001] This invention belongs to the technical field of isononol hydroformylation reactors, and more specifically, relates to an isononol hydroformylation reactor. Background Technology

[0002] In recent years, with the rapid development of the plastics industry and the increasing demands for environmental protection, the new generation plasticizer diisononyl phthalate (DINP) has been widely used in toys and wires and cables. As a raw material for DINP production, the demand for isononol (INA) has also grown rapidly. Isononol is generally produced through hydroformylation, which involves the hydroformylation of C8 olefins with syngas under high temperature, high pressure, and a catalyst. Currently, all industrially available hydroformylation technologies are homogeneous catalytic hydroformylation technologies.

[0003] Hydroformylation is a strongly exothermic reaction, and due to the stringent temperature control requirements, the heat of reaction needs to be removed promptly. Therefore, designing a heat-harvesting reaction system that can both extract heat and ensure uniform reaction temperature as much as possible in space is crucial. Existing gas-liquid upflow bubbling bed reactors lack internal components, making it impossible to distribute gas and extract heat, resulting in low reaction conversion rates. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an isononyl alcohol hydroformylation reactor, which solves the problem that existing gas-liquid upflow bubbling bed reactors lack internal components, making it impossible to distribute gas and extract heat, resulting in a low conversion rate.

[0005] To achieve the above objectives, the present invention provides an isononyl alcohol hydroformylation reactor, comprising:

[0006] The shell has a reactant inlet at its lower part and a reactant outlet on its upper sidewall.

[0007] A distribution device is disposed inside the housing and above the reactant inlet, and spaced apart from the reactant inlet, for uniformly distributing the gas-liquid reaction medium.

[0008] A heat extraction distribution structure is disposed inside the shell and above the distribution device, and spaced apart from the distribution device. The heat extraction distribution structure includes an inner tube box, an outer tube box, multiple heat exchange tubes, and at least one distribution plate. The inner tube box is disposed inside the outer tube box, and a heat extraction medium inlet cavity is formed inside the inner tube box. A heat extraction medium outlet cavity is formed between the inner tube box and the outer tube box. The heat exchange tubes are U-shaped tubes, with a heat extraction medium inlet and a heat extraction medium outlet at their two ends, respectively. The heat extraction medium inlet and the heat extraction medium outlet are respectively connected to the heat extraction medium inlet cavity and the heat extraction medium outlet cavity. The distribution plate is provided with multiple positioning through holes and a distribution structure, and each heat exchange tube passes through two of the positioning through holes.

[0009] Optionally, the upper inner wall of the shell forms the wall of the outer tube box. The upper end of the shell is provided with a bottom plate and a cover plate connected to the inner wall of the shell from bottom to top. The inner tube box includes an inner cylinder, which is coaxially disposed inside the outer tube box and connected to the bottom plate and the cover plate respectively. The heat exchange medium inlet and the heat exchange medium outlet are connected to the bottom plate. The cover plate is provided with a total heat exchange medium inlet and a total heat exchange medium outlet that are respectively connected to the heat exchange medium inlet cavity and the heat exchange medium outlet cavity.

[0010] Optionally, the top view projection of the axis of each heat exchange tube is a straight line, and the top view projection of all heat exchange tubes is divided into multiple regions of the same shape. Each of the multiple regions has one and only one endpoint located at the center of a virtual circle. The virtual circle is concentric with the cross section of the isononyl hydroformylation reactor. The top view projection of the heat exchange tube in each region can coincide with the top view projection of the heat exchange tube in the adjacent region when rotated around the center by a set angle.

[0011] Optionally, the region is a sector-shaped region, and the central angle of each sector-shaped region is 6°-60°.

[0012] Optionally, at least two distribution plates are provided, and the at least two distribution plates are arranged vertically at intervals, with a spacing of 1000-5000 mm between adjacent distribution plates.

[0013] Optionally, the distribution structure includes a plurality of circular first distribution through holes, which are formed on the distribution plate.

[0014] Optionally, the distribution structure includes a plurality of elongated second distribution through holes, which are formed on the distribution plate.

[0015] Optionally, the distribution plate is a wedge-shaped welded screen plate, and the slots of the wedge-shaped welded screen plate form the distribution structure.

[0016] Optionally, the distributing device includes a distributing plate, on which a distributing structure is provided, the distributing structure having the same structure as the distribution structure.

[0017] Optionally, the distance between the dispensing device and the reactant inlet is 200mm-5000mm.

[0018] This invention provides an isononol hydroformylation reactor, which has the following advantages: The reactor has a distribution device and a heat extraction distribution structure arranged sequentially from bottom to top inside the shell. The distribution device uniformly distributes the gas-liquid reaction medium, improving the uniformity of the gas-liquid reaction medium distribution within the shell. The heat extraction distribution structure has an inner tube box and an outer tube box. The heat extraction medium enters through the heat extraction medium inlet chamber in the inner tube box and exits through the heat extraction medium outlet chamber between the outer and inner tube boxes, achieving internal inflow and external outflow of the heat extraction medium. The heat extraction medium inlets of multiple heat exchange tubes are all connected to the heat extraction medium inlet chamber, and their heat extraction medium outlets are all connected to the heat extraction medium outlet chamber. Thus, when the heat extraction medium flows in the heat exchange tubes, the initially lower-temperature heat extraction medium can first extract heat from the center of the reactor, resulting in a larger heat extraction. The higher-temperature heat extraction medium, after completing part of the heat exchange, then extracts heat from the outer ring of the reactor. The heat output is low; furthermore, the at least one distribution plate, with multiple positioning through-holes and a distribution structure, provides positioning and support for the heat exchange tubes, ensuring their strength. The distribution structure distributes the gas-liquid reaction medium, further enhancing the uniformity of the gas-liquid reaction medium distribution within the reactor after the initial uniform distribution by the distribution device. This results in a stable and uniform gas-liquid distribution within the reactor, increasing the reaction conversion rate and reducing backmixing. The isononol hydroformylation reactor has a long gas-liquid reaction residence time, and the distribution plate further reduces backmixing. Radially, the reactor exhibits a hot center and cold periphery characteristic. Therefore, the radial arrangement of the heat exchange tubes in this heat extraction distribution structure for the isononol hydroformylation reactor minimizes radial temperature unevenness within the reactor, facilitating the reaction and improving the conversion rate. Furthermore, this invention can also be applied to other gas-liquid exothermic reaction systems for simultaneous gas distribution and heat extraction.

[0019] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0020] The above and other objects, features and advantages of the present invention will become more apparent from the more detailed description of exemplary embodiments of the invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the invention.

[0021] Figure 1 A schematic diagram of the structure of an isononyl alcohol hydroformylation reactor according to an embodiment of the present invention is shown.

[0022] Figure 2 A top-view projection schematic diagram of the heat exchange tubes in a fan-shaped region of a heat distribution structure of an isononyl hydroformylation reactor according to an embodiment of the present invention is shown.

[0023] Figure 3 A top-view projection schematic diagram of the heat exchange tubes in a fan-shaped region of a heat distribution structure of an isononyl hydroformylation reactor according to another embodiment of the present invention is shown.

[0024] Figure 4 A schematic diagram of the heat distribution plate of an isononyl alcohol hydroformylation reactor according to an embodiment of the present invention is shown.

[0025] Figure 5 A schematic diagram of the heat distribution plate of an isononyl hydroformylation reactor according to another embodiment of the present invention is shown.

[0026] Figure 6 A schematic diagram of the heat distribution plate of an isononyl hydroformylation reactor according to another embodiment of the present invention is shown.

[0027] Figure 7 A schematic diagram of positioning through holes on a distribution plate of a heat distribution structure for an isononyl hydroformylation reactor according to an embodiment of the present invention is shown.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Shell; 2. Reactant inlet; 3. Reactant outlet; 4. Distribution device; 5. Heat distribution structure; 501. Inner tube box; 502. Outer tube box; 503. Heat exchange tube; 504. Heat exchange medium inlet; 505. Heat exchange medium outlet; 506. Distribution plate; 507. Positioning through hole; 508. Base plate; 509. Cover plate; 510. Total heat exchange medium inlet; 511. Total heat exchange medium outlet; 512. Fan-shaped area; 513. First distribution through hole; 514. Second distribution through hole; 515. Wedge-shaped welded screen plate. Detailed Implementation

[0030] Preferred embodiments of the invention will now be described in more detail. While preferred embodiments of the invention are described below, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0031] like Figure 1 As shown, the present invention provides an isononanol hydroformylation reactor, comprising:

[0032] The shell 1 has a reactant inlet 2 at its lower part and a reactant outlet 3 on its upper side wall.

[0033] The distribution device 4 is located inside the housing 1 and above the reactant inlet 2, and is spaced apart from the reactant inlet 2, for uniformly distributing the gas-liquid reaction medium.

[0034] The heat extraction distribution structure 5 is disposed inside the shell 1 and above the distribution device 4, and is spaced apart from the distribution device 4. The heat extraction distribution structure 5 includes an inner tube box 501, an outer tube box 502, multiple heat exchange tubes 503, and at least one distribution plate 506. The inner tube box 501 is disposed inside the outer tube box 502. A heat extraction medium inlet cavity is formed inside the inner tube box 501, and a heat extraction medium outlet cavity is formed between the inner tube box 501 and the outer tube box 502. The heat exchange tubes 503 are U-shaped tubes, and the two ends of the heat exchange tubes 503 are respectively a heat extraction medium inlet 504 and a heat extraction medium outlet 505. The heat extraction medium inlet 504 and the heat extraction medium outlet 505 are respectively connected to the heat extraction medium inlet cavity and the heat extraction medium outlet cavity. The distribution plate 506 is provided with multiple positioning through holes 507 and a distribution structure, and each heat exchange tube 503 passes through two positioning through holes 507.

[0035] Specifically, to address the problem of low conversion rates in existing gas-liquid upflow bubbling bed reactors due to the lack of internal components, which hinder gas distribution and heat extraction, the isononol hydroformylation reactor provided by this invention has a distribution device 4 and a heat extraction distribution structure 5 arranged sequentially from bottom to top inside the shell 1. The distribution device 4 uniformly distributes the gas-liquid reaction medium, improving the uniformity of the gas-liquid reaction medium distribution within the shell 1. The heat extraction distribution structure 5 has an inner tube box 501 and an outer tube box 502, through which the heat extraction medium can pass... The heat exchange medium enters through the inlet chamber of the inner tube box 501 and exits through the outlet chamber between the outer tube box 502 and the inner tube box 501, realizing the inlet-outlet flow of the heat exchange medium. The heat exchange medium inlets 504 of multiple heat exchange tubes 503 are all connected to the heat exchange medium inlet chamber, and their heat exchange medium outlets 505 are all connected to the heat exchange medium outlet chamber. In this way, when the heat exchange medium flows in the heat exchange tubes 503, the heat exchange medium with a lower temperature at the beginning can first extract heat from the inner center of the reactor, and the heat extraction is larger. After completing part of the heat exchange, the temperature is higher. The heat-extracting medium then extracts heat from the inner outer ring of the reactor, resulting in a small amount of heat extraction. Furthermore, the at least one distribution plate 506, with multiple positioning through holes 507 and a distribution structure, provides positioning and support for the heat exchange tube 503, ensuring its support strength. The distribution structure distributes the gas-liquid reaction medium, and after the initial uniform distribution by the distribution device 4, it can further redistribute the medium, improving the uniformity of the gas-liquid reaction medium distribution within the reactor. This achieves a stable and uniform gas-liquid distribution within the reactor, increasing the reaction conversion rate and reducing backmixing. The isononol hydroformylation reactor has a long gas-liquid reaction residence time, and the distribution plate 506 reduces backmixing, resulting in a radially hot interior and a cold exterior characteristic of the reactor. Therefore, the radial arrangement of the U-shaped heat exchange tubes 503 in the heat-extracting distribution structure 5 for the isononol hydroformylation reactor minimizes the radial temperature unevenness within the reactor, which is beneficial for the reaction and improves the conversion rate.

[0036] Furthermore, the U-shaped heat exchange tube 503 in this invention is simple to manufacture and inexpensive. Multiple heat exchange tubes 503 can include several spare heat exchange tubes 503. The two ends of the spare heat exchange tubes 503 are sealed with plugs. When some heat exchange tubes 503 are damaged, the inner tube box 501 and outer tube box 502 can be opened, the two ends of the damaged heat exchange tube 503 can be sealed, and then the plugs of the same number of spare heat exchange tubes 503 can be opened, making maintenance very convenient.

[0037] Optionally, the upper inner wall of the shell 1 forms the box wall of the outer tube box 502. The upper end of the shell 1 is provided with a bottom plate 508 and a cover plate 509 connected to the inner wall of the shell 1 from bottom to top. The inner tube box 501 includes an inner cylinder, which is coaxially arranged inside the outer tube box 502 and connected to the bottom plate 508 and the cover plate 509 respectively. The heat exchange medium inlet 504 and the heat exchange medium outlet 505 are connected to the bottom plate 508. The cover plate 509 is provided with a heat exchange medium total inlet 510 and a heat exchange medium total outlet 511 that are respectively connected to the heat exchange medium inlet chamber and the heat exchange medium outlet chamber.

[0038] Specifically, the outer tube box 502 can directly utilize part of the inner wall of the reactor as its outer cylinder, and the inner tube is coaxially arranged inside the outer cylinder. The bottom plate 508 and the cover plate 509 seal the heat exchange medium inlet chamber and the heat exchange medium outlet chamber, and multiple connection holes are opened on the bottom plate 508. Half of the multiple connection holes are connected to the heat exchange medium inlet chamber, and the other half are connected to the heat exchange medium outlet chamber. The heat exchange medium first enters the heat exchange medium inlet chamber through the heat exchange medium total inlet 510, then distributes into multiple heat exchange tubes 503, and then flows into the heat exchange medium outlet chamber, and flows out uniformly through the heat exchange medium total outlet 511.

[0039] Optionally, the top view projection of the axis of each heat exchange tube 503 is a straight line. The top view projection of all heat exchange tubes 503 is divided into multiple regions of the same shape. Each region has only one end located at the center of a virtual circle. The virtual circle is concentric with the cross section of the isononyl hydroformylation reactor. The top view projection of the heat exchange tube 503 in each region can coincide with the top view projection of the heat exchange tube 503 in the adjacent region when rotated around the center by a set angle.

[0040] Specifically, multiple regions are rotationally symmetric figures with respect to the center of the circle.

[0041] In this embodiment, the top view projection of the axis of each heat exchange tube 503 is a straight line. The top view projection of all heat exchange tubes 503 is divided into multiple fan-shaped regions 512. The multiple fan-shaped regions 512 are concentric and can form a circle. The top view projection of the heat exchange tube 503 in each fan-shaped region 512 can coincide with the top view projection of the heat exchange tube 503 in the adjacent fan-shaped region 512 when rotated around the center of the circle by the same angle as its central angle.

[0042] Specifically, the heat exchange tubes 503 are arranged vertically inside the reactor, and their top view projection is a straight line. The top view projections of multiple heat exchange tubes 503 are divided into multiple sector regions 512. Each sector region 512 contains several heat exchange tubes 503. When a sector region 512 is rotated around its center by an angle equal to the central angle of that sector region 512, the top view projection of the heat exchange tubes 503 in that sector region 512 coincides with the top view projection of the heat exchange tubes 503 in the adjacent sector region 512. Thus, the multiple sector regions 512 form a circumferential array arrangement. This arrangement makes the distribution of multiple heat exchange tubes 503 in the circumferential direction more uniform, which is beneficial for uniform heat extraction.

[0043] Optionally, the region is a sector region 512, and the central angle of each sector region 512 is 6°-60°.

[0044] Specifically, in theory, any integer division of 360° can be used as the central angle of the aforementioned sector region 512. However, due to engineering manufacturing difficulties, 6°-60° is chosen as the central angle of the aforementioned sector region 512. Too small a central angle will result in the heat exchange tubes 503 being distributed too densely within the sector region 512, which is not conducive to construction. Too large a central angle will result in poor uniformity of the distribution of the heat exchange tubes 503, which is not conducive to uniform heat exchange.

[0045] In one embodiment, such as Figure 2 As shown, the central angle of each sector 512 is 6°, and the complete top-view projection circle is divided into 60 sector regions 512.

[0046] In another embodiment, such as Figure 3 As shown, the central angle of each sector 512 is 60°, and the complete top-view projection circle is divided into 6 sector regions 512.

[0047] Optionally, the heat exchange medium flowing inside the heat exchange tube 503 is deoxygenated water.

[0048] Specifically, the heat exchange medium is deoxygenated water, which can be used for heat extraction through latent heat of steam or direct sensible heat extraction.

[0049] Optionally, at least two distribution plates 506 are provided, and the at least two distribution plates 506 are arranged vertically at intervals, with a spacing of 1000-5000mm between adjacent distribution plates 506.

[0050] Specifically, depending on the flow rate of the gas-liquid reaction medium on the reaction side, the spacing of the distribution plate 506 is set to 1000mm-5000mm. Too small a spacing will cause the pressure drop of the gas-liquid reaction medium to be too large, while too large a spacing will cause the heat extraction distribution structure 5 to vibrate.

[0051] Optionally, the diameter of the positioning through hole 507 matches the outer diameter of the heat exchange tube 503.

[0052] Specifically, the heat exchange tube 503 is inserted into the positioning through hole 507. The positioning through hole 507 plays a supporting and positioning role for the heat exchange tube 503, which can improve the overall strength and stability of the heat distribution structure 5.

[0053] In this embodiment, the distribution structure includes a plurality of circular first distribution through holes 513, which are formed on the distribution plate 506.

[0054] Specifically, such as Figure 4 As shown, the distribution structure consists of multiple first distribution through holes 513. The first distribution through holes 513 are round holes and are staggered on the distribution plate 506. The opening rate of the first distribution holes is 5%-20%. The first distribution holes allow the gas-liquid reaction medium to pass through, which can uniformly distribute the gas-liquid reaction medium in the reactor.

[0055] In another embodiment, the distribution structure includes a plurality of elongated second distribution through holes 514, which are formed on the distribution plate 506.

[0056] Specifically, such as Figure 5 As shown, the distribution structure consists of multiple second distribution through holes 514. The second distribution through holes 514 are elongated holes and are arranged in a rectangular array on the distribution plate 506. The opening rate of the second distribution holes is 5%-20%. The second distribution holes allow the gas-liquid reaction medium to pass through, which can uniformly distribute the gas-liquid reaction medium in the reactor.

[0057] In another embodiment, the distribution plate 506 is a wedge-shaped welded screen plate 515, the slots of which form a distribution structure.

[0058] Specifically, such as Figure 6 As shown, a wedge-shaped welded screen plate 515 is used as a distribution plate 506. The slots of the wedge-shaped welded screen plate 515 form a distribution structure, which has the mixing effect of compressing and expanding the incoming flow from below.

[0059] Furthermore, depending on the distribution requirements of the gas-liquid reaction medium, 1-3 layers of distribution plates 506 can be set, including but not limited to the following schemes: using a single layer, such as... Figure 4 The distribution plate 506 shown has a first distribution through-hole 513, and can be used alone as a single layer. Figure 5 The distribution plate 506 shown has a second distribution through-hole 514, and can be used alone as a single layer. Figure 6 The wedge-shaped welded screen plate 515 shown is used as a distribution plate 506. Any two of the above three distribution plates 506 can be combined.

[0060] Optionally, the distribution device 4 includes a distribution plate, on which a distribution structure is provided. The distribution structure and the distribution structure have the same structure and are arranged alternately.

[0061] Specifically, the outer periphery of the distribution plate is connected to the inner wall of the shell 1. The distribution structure on the distribution plate is the same as the distribution structure on the distribution plate 506. Both can have three different structural forms: a structure with multiple circular first distribution through holes, a structure with multiple elongated second distribution through holes, and a wedge-shaped welded screen plate 515 as the distribution plate to form the distribution structure. Regardless of the structural form adopted, in order to improve the distribution and redistribution effect, the distribution structure and the distribution structure are arranged alternately, that is, the distribution structure and the distribution structure do not correspond to each other in the vertical direction.

[0062] Optionally, the distance between the dispensing device 4 and the reactant inlet 2 is 200mm-5000mm.

[0063] Specifically, based on the physical properties of the gas and liquid, such as viscosity, flow rate, and surface tension, cold model tests revealed that a distance of 200mm-1500mm between the distribution device 4 and the reactant inlet 2 can meet the gas distribution requirements. For most gas-liquid reaction media systems, the optimal distance between the distribution device 4 and the reactant inlet 2 is between 300mm-800mm. An excessively large distance wastes the internal space of the reactor, while an excessively small distance cannot fully disperse the gas-liquid reaction media flow at the reactant inlet 2.

[0064] In summary, when the isononol hydroformylation reactor provided by this invention is used, the gas-liquid two-phase reaction medium to be reacted enters the reactor from the reactant inlet 2 at the bottom of the reactor. The gas-liquid reaction medium is then uniformly dispersed upwards through the distribution device 4. Afterwards, the gas-liquid reaction medium passes through the heat distribution structure 5 and is heated by multiple U-shaped heat exchange tubes 503. This allows the initially lower-temperature heat-receiving medium to first extract heat from the center of the reactor, resulting in a larger heat extraction, while the higher-temperature heat-receiving medium, after partial heat exchange, extracts heat from the outer ring of the reactor, resulting in a smaller heat extraction. This minimizes the unevenness of the radial temperature distribution within the reactor, which is beneficial for the reaction and can improve the conversion rate. The completely reacted gas-liquid reaction medium exits the reactor from the reactant outlet 3 located on the upper side wall of the reactor.

[0065] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A isononyl alcohol hydroformylation reactor, characterized in that, include: The shell has a reactant inlet at its lower part and a reactant outlet on its upper sidewall. A distribution device is disposed inside the housing and above the reactant inlet, and spaced apart from the reactant inlet, for uniformly distributing the gas-liquid reaction medium. A heat extraction distribution structure is disposed inside the shell and above the distribution device, and spaced apart from the distribution device. The heat extraction distribution structure includes an inner tube box, an outer tube box, multiple heat exchange tubes, and at least one distribution plate. The inner tube box is disposed inside the outer tube box, and a heat extraction medium inlet cavity is formed inside the inner tube box. A heat extraction medium outlet cavity is formed between the inner tube box and the outer tube box. The heat exchange tubes are U-shaped tubes, and the top view projection of the axis of each heat exchange tube is a straight line. The two ends of each heat exchange tube are a heat extraction medium inlet and a heat extraction medium outlet, respectively, which are connected to the heat extraction medium inlet cavity and the heat extraction medium outlet cavity, respectively. The distribution plate is provided with multiple positioning through holes and a distribution structure, and each heat exchange tube passes through two of the positioning through holes. The upper inner wall of the shell forms the wall of the outer tube box. From bottom to top, the upper end of the shell is provided with a bottom plate and a cover plate connected to the inner wall of the shell. The inner tube box includes an inner cylinder, which is coaxially disposed inside the outer tube box and connected to the bottom plate and the cover plate respectively. The heat exchange medium inlet and the heat exchange medium outlet are connected to the bottom plate. The cover plate is provided with a total heat exchange medium inlet and a total heat exchange medium outlet that are respectively connected to the heat exchange medium inlet cavity and the heat exchange medium outlet cavity. The lower-temperature heat-extracting medium that enters first can extract heat from the center of the reactor, and the heat extraction is relatively large. After completing part of the heat exchange, the higher-temperature heat-extracting medium then extracts heat from the outer ring of the reactor, and the heat extraction is relatively small. This can reduce the uneven radial temperature distribution in the isononol hydroformylation reactor, which has the characteristic of being hot in the middle and cold on the periphery.

2. The isononanol hydroformylation reactor according to claim 1, characterized in that, The top view projection of all the heat exchange tubes is divided into multiple regions of the same shape. Each region has one and only one endpoint located at the center of a virtual circle. The virtual circle is concentric with the cross section of the isononyl hydroformylation reactor. The top view projection of the heat exchange tube in each region can coincide with the top view projection of the heat exchange tube in the adjacent region when rotated around the center by a set angle.

3. The isononyl alcohol hydroformylation reactor according to claim 2, characterized in that, The region is a sector-shaped region, and the central angle of each sector is 6°-60°.

4. The isononanol hydroformylation reactor according to claim 1, characterized in that, At least two distribution plates are provided, and the at least two distribution plates are arranged vertically at intervals, with a spacing of 1000-5000 mm between adjacent distribution plates.

5. The isononyl alcohol hydroformylation reactor according to claim 1, characterized in that, The distribution structure includes a plurality of circular first distribution through holes, which are formed on the distribution plate.

6. The isononanol hydroformylation reactor according to claim 1, characterized in that, The distribution structure includes a plurality of elongated second distribution through holes, which are formed on the distribution plate.

7. The isononanol hydroformylation reactor according to claim 1, characterized in that, The distribution plate is a wedge-shaped welded screen plate, and the slots of the wedge-shaped welded screen plate form the distribution structure.

8. The isononanol hydroformylation reactor according to any one of claims 5-7, characterized in that, The distributing device includes a distributing plate, on which a distributing structure is provided, and the distributing structure has the same structure as the distribution structure.

9. The isononanol hydroformylation reactor according to claim 1, characterized in that, The distance between the dispensing device and the reactant inlet is 200mm-5000mm.

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