Isononyl alcohol hydroformylation reactor

Abstract

The present invention provides an isononyl alcohol hydroformylation reactor, and relates to the technical field of isononyl alcohol hydroformylation reactors, the isononyl alcohol hydroformylation reactor comprises: a housing, the lower part of the housing is provided with a reactant inlet, and the side wall of the upper part of the housing is provided with a reactant outlet; the diffusion device is arranged in the shell and is positioned above the reactant inlet; the distribution device is arranged in the shell and is positioned above the diffusion device; the heat exchange distribution structure is arranged in the shell and located above the distribution device, the heat exchange distribution structure comprises a plurality of heat exchange pipes and at least one distribution plate, the axes of the heat exchange pipes are parallel to one another, the heat exchange pipes are annularly distributed along a plurality of concentric virtual circumferences, the distribution plate is provided with a plurality of positioning through holes and a distribution structure, and the positioning through holes are communicated with the distribution structure. The plurality of heat exchange tubes are respectively arranged in the plurality of positioning through holes in a penetrating manner; the isononyl alcohol hydroformylation reactor solves the problems of non-uniform distribution of gas and liquid reactants, serious back-mixing phenomenon in the reaction process and low reaction conversion rate of the isononyl alcohol hydroformylation reactor in the prior art.

Description

Technical Field

[0001] The invention belongs to the technical field of isononanol hydroformylation reactors, and more specifically, relates to an isononanol hydroformylation reactor. Background Art

[0002] Olefins react with synthesis gas (CO+H2) under the action of transition metal cobalt or rhodium to generate aldehyde compounds with one more carbon atom than olefins. This reaction process is the hydroformylation reaction of olefins, which is the most successful and widely used homogeneous catalytic reaction process in industrial application. The generated aldehydes can be further processed into compounds such as alcohols, esters, ethers, carboxylic acids and amines.

[0003] Isononyl alcohol includes high-branched isononyl alcohol and low-branched isononyl alcohol. Low-branched isononyl alcohol is used to produce plasticizers such as diisononyl phthalate (DINP), diisononyl adipate (DINA) and trihydroxymethyl triisononyl ester (TINTM). These plasticizers have excellent performance and are non-toxic. They are mainly used in polyvinyl chloride, vinyl chloride copolymers, cellulose acetate, ethyl cellulose and synthetic rubber to replace dioctyl phthalate (DOP) which has been banned or restricted in Europe and the United States and is considered to be potentially carcinogenic. High-branched isononyl alcohol (3,5,5-trimethyl-1-hexanol) is a cosmetic additive. Isononyl alcohol uses C8 olefins and synthesis gas as reactants to generate C9 alcohols and C9 aldehydes under a certain temperature, pressure, and homogeneous catalysis of transition metal (Co or Ru) complexes. Side reactions include direct hydrogenation of reactant olefins and aldol condensation to generate heavy substances.

[0004] The reactor used in the hydroformylation reaction is usually an upflow bubbling reactor. This type of reactor is suitable for slow reactions and reactions with large heat release, but the liquid phase has severe axial back mixing, which can be considered as full mixing, so it is difficult for a single reactor to achieve a high conversion rate, so multiple reactors are usually connected in series. It is very complicated for the gas-liquid reaction system of the isononanol hydroformylation reactor to reach a steady state, which is jointly determined by the reaction rate, solubility and mass transfer rate. In the existing isononanol hydroformylation reactor, the gas-liquid reactants have obvious back mixing and impact at the reactant inlet, the gas-liquid reactants are unevenly distributed inside the reactor, and the local concentration stability of the gaseous reactants at different axial positions is poor, resulting in serious back mixing during the reaction and low reaction conversion rate. Summary of the invention

[0005] The purpose of the present invention is to provide an isononanol hydroformylation reactor in view of the deficiencies in the prior art, so as to solve the problems that the gaseous and liquid reactants in the isononanol hydroformylation reactor in the prior art have obvious back-mixing and impact at the reactant inlet, the gaseous and liquid reactants are unevenly distributed inside the reactor, and the local concentration stability of the gaseous reactants at different axial positions is poor, resulting in serious back-mixing during the reaction and low reaction conversion rate.

[0006] In order to achieve the above object, the present invention provides an isononanol hydroformylation reactor, comprising:

[0007] A shell, wherein a reactant inlet is disposed at the lower portion of the shell, and a reactant outlet is disposed on the upper side wall of the shell;

[0008] a diffusion device, disposed inside the shell and above the reactant inlet, for dispersing the gaseous and liquid reaction medium entering the shell through the reactant inlet;

[0009] A distribution device, arranged inside the shell and above the diffusion device, and spaced apart from the diffusion device, for uniformly distributing the gas-liquid reaction medium;

[0010] A heat exchange distribution structure is arranged inside the shell and above the distribution device, and is spaced apart from the distribution device. The heat exchange distribution structure includes a plurality of heat exchange tubes and at least one distribution plate. The axes of the plurality of heat exchange tubes are parallel to each other. The plurality of heat exchange tubes are distributed in a ring shape along a plurality of concentric virtual circles. The distribution plate is provided with a plurality of positioning through holes and a distribution structure. The plurality of heat exchange tubes are respectively passed through the plurality of positioning through holes.

[0011] Optionally, the diffusion device includes a baffle and a plurality of connecting parts, two ends of the plurality of connecting parts are respectively connected to the reactant inlet and the baffle, and the baffle is in the shape of an inverted umbrella.

[0012] Optionally, a bubble generating device is further included, which is arranged outside the shell and connected to the reactant inlet, and is used to connect the gaseous reaction medium pipeline and the liquid reaction medium pipeline. A porous medium is arranged in the bubble generating device, and the gaseous reaction medium can enter the liquid reaction medium through the porous medium.

[0013] Optionally, a defoaming screen is further included, wherein the defoaming screen is arranged inside the shell and above the heat exchange distribution structure.

[0014] Optionally, the heat exchange tube includes an inner tube and an outer tube, and the two ends of the outer tube are respectively provided with a first sealing plate and a second sealing plate, one end of the inner tube is inserted into the outer tube and forms a first gap with the first sealing plate, and the other end of the inner tube passes through the second sealing plate and extends outward to form an extension portion, the outer end of the extension portion forms a heat exchange medium inlet, and a heat exchange medium outlet is opened on the outer wall of the outer tube.

[0015] Optionally, the heat exchange distribution structure also includes a first fixed baffle and a second fixed baffle connected to the inner wall of the shell at the outer periphery, the first fixed baffle is connected to the extension portion, the second fixed baffle is connected to the outer tube, a heat exchange medium inlet space is formed on the side of the first fixed baffle away from the second fixed baffle, a heat exchange medium outflow space is formed between the first fixed baffle and the second fixed baffle, the heat exchange medium inlet and the heat exchange medium outlet are respectively located in the heat exchange medium inlet space and the heat exchange medium outflow space, a cover plate is provided on the top of the heat exchange medium inlet space, a heat exchange medium pipeline is connected to the cover plate, a heat exchange medium total inlet connected to the heat exchange medium pipeline is provided on the top of the shell, and a heat exchange medium total outlet connected to the heat exchange medium outflow space is provided on the upper side wall of the shell.

[0016] Optionally, the distribution structure includes a plurality of distribution through holes, and the plurality of distribution through holes are opened on the distribution plate.

[0017] Optionally, the distribution plate is a slit mesh plate, and the slits and / or mesh holes of the slit mesh plate form the distribution structure.

[0018] Optionally, the distribution structure includes a plurality of tubular distributors, a plurality of mounting holes are provided on the distribution plate, and the plurality of tubular distributors are respectively installed on the reaction medium flow side of the distribution plate through the plurality of mounting holes. The tubular distributor includes a tube body and a buffer plate, one end of the tube body is connected to the mounting hole, a plurality of flow holes are provided on the outer wall of the tube body, a plurality of connecting pins are arranged at intervals on the outer periphery of the buffer plate, and the buffer plate is connected to the tube body through the connecting pins.

[0019] Optionally, the distribution device comprises a distribution plate, on which a distribution structure is arranged, the distribution structure is the same as the distribution structure, and the distribution structure and the distribution structure are arranged in an alternating manner.

[0020] The invention provides an isononanol hydroformylation reactor, which has the beneficial effects that: a diffusion device, a distribution device and a heat exchange distribution structure are sequentially arranged in a shell from bottom to top in the isononanol hydroformylation reactor; the diffusion device is arranged to buffer and disperse the gas-liquid reaction medium entering the shell through the reactant inlet, thereby preventing the gas-liquid reaction medium from being strongly mixed and impacted at the reactant inlet; the distribution device is arranged to evenly distribute the gas-liquid reaction medium, thereby improving the uniformity of the distribution of the gas-liquid reaction medium in the shell; the heat exchange distribution structure comprises a plurality of heat exchange tubes and at least one distribution plate; the plurality of heat exchange tubes are arranged in an annular shape along a plurality of concentric virtual circles. The distribution enables the gas-liquid reaction medium to flow in the axial direction of the heat exchange tube, i.e., the axial direction of the reactor, in a stable and flat push form, which is beneficial to the stability of the reaction mass transfer. A plurality of positioning through holes and a distribution structure are arranged on the distribution plate. The positioning through holes can position the heat exchange tube to form a support for the heat exchange tube, thereby ensuring the support strength of the heat exchange tube. The distribution structure can redistribute the gas-liquid reaction medium, and the downstream of the redistribution device can further improve the uniform distribution of the gas-liquid reaction medium, thereby achieving a stable and uniform distribution of gas and liquid in the reactor and improving the reaction conversion rate. The distribution form of the heat exchange tube and the coordination of the distribution plate can avoid the reverse mixing phenomenon while meeting the heat extraction conditions of the isononanol hydroformylation reaction.

[0021] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0023] Figure 1 A schematic structural diagram of an isononanol hydroformylation reactor according to an embodiment of the present invention is shown.

[0024] Figure 2 A schematic diagram of a heat exchange distribution structure of an isononanol hydroformylation reactor according to an embodiment of the present invention is shown.

[0025] Figure 3 A schematic diagram showing the distribution of heat exchange tubes of a heat exchange distribution structure of an isononanol hydroformylation reactor according to an embodiment of the present invention is shown.

[0026] Figure 4 A schematic structural diagram of heat exchange tubes of a heat exchange distribution structure of an isononanol hydroformylation reactor according to an embodiment of the present invention is shown.

[0027] Figure 5A schematic structural diagram of a distribution plate of a heat exchange distribution structure of an isononanol hydroformylation reactor according to an embodiment of the present invention is shown.

[0028] Figure 6 A schematic structural diagram of a distribution plate of a heat exchange distribution structure of an isononanol hydroformylation reactor according to other embodiments of the present invention is shown.

[0029] Figure 7 A schematic structural diagram of a distribution plate of a heat exchange distribution structure of an isononanol hydroformylation reactor according to other embodiments of the present invention is shown.

[0030] Figure 8 A schematic structural diagram of a tubular distributor of a heat exchange distribution structure of an isononanol hydroformylation reactor according to other embodiments of the present invention is shown.

[0031] Fig. 9 Shows Figure 8 Schematic diagram of the cross-sectional structure in the A direction.

[0032] Fig.10 Shows Figure 8 Schematic diagram of the cross-sectional structure in the B direction.

[0033] Description of reference numerals:

[0034] 1. Shell; 2. Reactant inlet; 3. Reactant outlet; 4. Diffusion device; 401. Baffle; 402. Connecting part; 5. Distribution device; 6. Heat exchange distribution structure; 601. Heat exchange tube; 602. Distribution plate; 603. Positioning through hole; 604. Inner tube; 605. Outer tube; 606. First sealing plate; 607. Second sealing plate; 608. Heat exchange medium inlet; 609. Heat exchange medium outlet; 610. First fixed baffle; 611. Second fixed baffle; 612. Heat exchange medium inlet space; 613. Heat exchange medium outlet space; 614. Heat exchange medium total inlet; 615. Heat exchange medium total outlet; 616. Distribution through hole; 617. Tubular distributor; 618. Tube body; 619. Buffer plate; 620. Connecting foot; 621. Flow through hole; 7. Bubble generating device; 8. Foam removing screen. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0036] like Figures 1 to 3As shown, the present invention provides an isononanol hydroformylation reactor, comprising:

[0037] A shell 1, a reactant inlet 2 is provided at the lower portion of the shell 1, and a reactant outlet 3 is provided on the upper side wall of the shell 1;

[0038] The diffusion device 4 is arranged inside the housing 1 and above the reactant inlet 2, and is used to disperse the gaseous and liquid reaction medium entering the housing 1 through the reactant inlet 2;

[0039] The distribution device 5 is arranged inside the housing 1 and above the diffusion device 4, and is spaced apart from the diffusion device 4, and is used to evenly distribute the gas-liquid reaction medium;

[0040] The heat exchange distribution structure 6 is arranged inside the shell 1 and above the distribution device 5, and is spaced apart from the distribution device 5. The heat exchange distribution structure 6 includes a plurality of heat exchange tubes 601 and at least one distribution plate 602. The axes of the plurality of heat exchange tubes 601 are parallel to each other. The plurality of heat exchange tubes 601 are distributed in a ring shape along a plurality of concentric virtual circles. The distribution plate 602 is provided with a plurality of positioning through holes 603 and a distribution structure. The plurality of heat exchange tubes 601 are respectively passed through the plurality of positioning through holes 603.

[0041] Specifically, in order to solve the problems that the gas-liquid reactants in the isononanol hydroformylation reactor in the prior art have obvious back-mixing and impact at the reactant inlet 2, the gas-liquid reactants are unevenly distributed inside the reactor, and the local concentration stability of the gaseous reactants at different axial positions is poor, resulting in serious back-mixing during the reaction and low reaction conversion rate; the isononanol hydroformylation reactor provided by the present invention is provided with a diffusion device 4, a distribution device 5 and a heat exchange distribution structure 6 in sequence from bottom to top inside the shell 1. The diffusion device 4 is provided to buffer and disperse the gas-liquid reaction medium entering the shell 1 through the reactant inlet 2 to prevent the gas-liquid reaction medium from having strong back-mixing and impact at the reactant inlet 2. The distribution device 5 is provided to evenly distribute the gas-liquid reaction medium to improve the uniformity of the distribution of the gas-liquid reaction medium in the shell 1. The heat exchange distribution structure 6 has multiple heat exchangers. Tube 601 and at least one distribution plate 602, multiple heat exchange tubes 601 are distributed in annular shape along multiple concentric virtual circles, so that the gas-liquid reaction medium can flow along the axial direction of the heat exchange tube 601, that is, the axial direction of the reactor in a stable and flat push form, which is beneficial to the stability of the reaction mass transfer. The distribution plate 602 is provided with multiple positioning through holes 603 and a distribution structure. The positioning through holes 603 can position the heat exchange tube 601, form a support for the heat exchange tube 601, and ensure the support strength of the heat exchange tube 601. The distribution structure can redistribute the gas-liquid reaction medium, and the downstream of the redistribution device 5 can further improve the uniform distribution of the gas-liquid reaction medium, realize the stable and uniform distribution of gas and liquid in the reactor, and improve the reaction conversion rate. The distribution form of the heat exchange tube 601 and the distribution plate 602 can meet the heat extraction conditions of the isononanol hydroformylation reaction and avoid the back mixing phenomenon.

[0042] Furthermore, an upper head and a lower head are respectively provided at the upper and lower ends of the shell 1, and the reactant inlet 2 is provided on the lower head, and the specific position may be the side or bottom of the lower head.

[0043] Optionally, the diffusion device 4 includes a baffle 401 and a plurality of connecting parts 402 , two ends of the plurality of connecting parts 402 are respectively connected to the reactant inlet 2 and the baffle 401 , and the baffle 401 is in the shape of an inverted umbrella.

[0044] Specifically, above the reactant inlet 2 on the lower head of the diffusion device 4, it is used to buffer and diffuse the gas-liquid reaction medium entering the shell 1 from bottom to top, so as to prevent the gas-liquid reaction medium from being strongly mixed and impacted at the reactant inlet 2. The diffusion device 4 includes an inverted umbrella-shaped baffle 401 and a connecting part 402. The connecting part 402 can be rod-shaped and is used to connect the baffle 401 and the lower head. The baffle 401 is provided with a plurality of through holes to ensure that the gas-liquid reaction medium in the middle can be accommodated to pass through.

[0045] Furthermore, the inverted umbrella angle of the baffle 401 of the diffusion device 4 can be 90°-120°, the diameter of the baffle 401 is larger than the diameter of the reactant inlet 2, the diameter of the through hole on the baffle 401 is 10-50 mm, and the center distance between adjacent through holes is 5 times the through hole diameter.

[0046] Optionally, a bubble generating device 7 is also included. The bubble generating device 7 is arranged outside the shell 1 and connected to the reactant inlet 2. The bubble generating device 7 is used to connect the gaseous reaction medium pipeline and the liquid reaction medium pipeline. A porous medium is arranged in the bubble generating device 7, and the gaseous reaction medium can enter the liquid reaction medium through the porous medium.

[0047] Specifically, a bubble generating device 7 is provided in front of the reactant inlet 2 to enhance the contact between the gas-liquid two-phase reaction medium. The size of the bubbles can be controlled according to the reaction requirements, and the size of the bubbles is controlled to be 1-20 mm. The gaseous reaction medium pipeline and the liquid reaction medium pipeline are connected to the bubble generating device 7. After the gaseous reaction medium enters the bubble generating device 7, it can enter the liquid reaction medium through the porous medium and enter the reactant inlet 2 together.

[0048] Optionally, a de-mist screen 8 is further included, and the de-mist screen 8 is arranged inside the shell 1 and above the heat exchange distribution structure 6 .

[0049] Specifically, the foam removal screen 8 is arranged above the heat exchange distribution structure 6 to eliminate accumulated foam inside the reactor. The thickness of the foam removal screen 8 is 20-50 mm.

[0050] Optionally, the heat exchange tube 601 includes an inner tube 604 and an outer tube 605, and the two ends of the outer tube 605 are respectively provided with a first sealing plate 606 and a second sealing plate 607, one end of the inner tube 604 is passed through the outer tube 605 and forms a first gap with the first sealing plate 606, the other end of the inner tube 604 passes through the second sealing plate 607 and extends outward to form an extension portion, the outer end of the extension portion forms a heat exchange medium inlet 608, and a heat exchange medium outlet 609 is opened on the outer wall of the outer tube 605.

[0051] Specifically, Figure 4 As shown, the heat exchange tube 601 includes an inner tube 604 and an outer tube 605. The inner tube 604 and the outer tube 605 form a shell-and-tube heat exchange tube 601 structure. The heat exchange medium enters from the heat exchange medium inlet 608, passes through the inside of the inner tube 604, between the outer tube 605 and the inner tube 604, and then flows out through the heat exchange medium outlet 609, thereby completing the heat exchange inside the reactor. Such a shell-and-tube heat exchange structure can improve the uniformity of heat exchange.

[0052] In this embodiment, the heat exchange medium is a heat extraction medium.

[0053] Optionally, the heat exchange distribution structure 6 also includes a first fixed baffle 610 and a second fixed baffle 611 connected to the inner wall of the shell 1 at the periphery, the first fixed baffle 610 is connected to the extension part, the second fixed baffle 611 is connected to the outer tube 605, a heat exchange medium inlet space 612 is formed on the side of the first fixed baffle 610 away from the second fixed baffle 611, a heat exchange medium outflow space 613 is formed between the first fixed baffle 610 and the second fixed baffle 611, a heat exchange medium inlet 608 and a heat exchange medium outlet 609 are respectively located in the heat exchange medium inlet space 612 and the heat exchange medium outflow space 613, a cover plate is provided on the top of the heat exchange medium inlet space 612, a heat exchange medium pipeline is connected to the cover plate, a heat exchange medium total inlet 614 connected to the heat exchange medium pipeline is provided on the top of the shell 1, and a heat exchange medium total outlet 615 connected to the heat exchange medium outflow space 613 is provided on the upper side wall of the shell 1.

[0054] Specifically, the outer periphery of the first fixed baffle 610 and the second fixed baffle 611 is connected to the reactor, and the heat exchange medium can first be injected into the heat exchange medium entry space 612 through the heat exchange medium pipeline via the heat exchange medium total inlet 614, and then enter the heat exchange medium inlet 608 of the multiple heat exchange tubes 601, so that the heat exchange medium enters each heat exchange tube 601 evenly, further improving the uniformity of heat exchange. After the heat exchange is completed, it flows out from the heat exchange medium outlet 609, enters the heat exchange medium outflow space 613, and is then discharged through the heat exchange medium total outlet 615.

[0055] Optionally, the heat exchange medium flowing in the heat exchange tube 601 is deoxygenated water.

[0056] Specifically, the heat exchange medium is deoxygenated water, which can generate steam latent heat to extract heat, or directly generate sensible heat to extract heat.

[0057] In this embodiment, the diameter of the inner tube 604 is 10-80 mm, the diameter of the outer tube 605 is 30-100 mm, and the wall thickness of the inner tube 604 and the outer tube is 1-5 mm.

[0058] Optionally, at least two distribution plates 602 are provided, and at least two distribution plates 602 are arranged at intervals along the axis of the heat exchange tube 601, and the interval between adjacent distribution plates 602 is 500-5000 mm.

[0059] Specifically, the periphery of the distribution plate 602 can be connected to the reactor, and the distribution plate 602 can not only support and position the multiple heat exchange tubes 601, but also promote the mixing and uniform distribution of the gas-liquid reaction medium; the number of distribution plates 602 can be set according to the actual reaction process parameters.

[0060] Optionally, the aperture of the positioning through hole 603 is 2-10 mm larger than the outer diameter of the heat exchange tube 601 .

[0061] Specifically, the positioning through hole 603 is slightly larger than the heat exchange tube 601 inserted therein.

[0062] In this embodiment, the distribution structure includes a plurality of distribution through holes 616 , and the plurality of distribution through holes 616 are opened on the distribution plate 602 .

[0063] Specifically, Figure 5 As shown, the shape of the distribution through holes 616 can be circular, square, diamond, polygonal, etc. The equivalent diameter of the distribution through holes 616 is 20-50 mm, and the opening rate is more than 20%. The distribution through holes 616 can be evenly distributed on the distribution plate 602, or distributed between adjacent positioning through holes 603. The distribution through holes 616 allow the gas-liquid reaction medium to pass through, so as to evenly distribute the gas-liquid reaction medium.

[0064] In another embodiment, the distribution plate 602 is a slit mesh plate, and the slits and / or meshes of the slit mesh plate form a distribution structure.

[0065] Specifically, Figure 6 As shown, the slit mesh plate is provided with slits and / or mesh holes. Preferably, a wedge-shaped welded screen plate, i.e. a wedge-shaped welded screen plate, can be used as the distribution plate 602, thereby forming a distribution plate 602 with a distribution structure, which has a mixing effect of compressing and expanding the lower incoming flow.

[0066] In another other embodiment, the distribution structure includes a plurality of tubular distributors 617, a plurality of mounting holes are opened on the distribution plate 602, and the plurality of tubular distributors 617 are respectively installed on the reaction medium inflow side of the distribution plate 602 through the plurality of mounting holes. The tubular distributor 617 includes a tube body 618 and a buffer plate 619, one end of the tube body 618 is connected to the mounting hole, a plurality of flow holes 621 are opened on the outer wall of the tube body 618, a plurality of connecting pins 620 are arranged at intervals on the outer periphery of the buffer plate 619, and the buffer plate 619 is connected to the tube body 618 through the connecting pins 620.

[0067] Specifically, Figures 7 to 10As shown, a plurality of tubular distributors 617 can also be provided on the distribution plate 602 as a distribution structure. The plurality of tubular distributors 617 are respectively mounted on a plurality of mounting holes on the distribution plate 602. The plurality of tubular distributors 617 can be evenly distributed on the distribution plate 602 or distributed between adjacent positioning holes 603. The lower portion of the tubular distributor 617 is a buffer plate 619. The buffer plate 619 is connected to the lower end of the tube body 618 via a connecting pin 620 extending axially along the tube body 618, and an opening is formed between adjacent connecting pins 620. Symmetrically distributed flow holes 621 are provided on the tube body 618, and most of the gas-liquid reaction medium passes through the above-mentioned opening between the buffer plate 619 and the tube body 618. The structure of the flow holes 621 can be a slit or a hole to ensure that the gas phase will not accumulate under the distribution plate 602 to form an air cushion layer.

[0068] Optionally, the distribution device 5 comprises a distribution plate, on which a distribution structure is arranged, the distribution structure is the same as the distribution structure, and the distribution structure and the distribution structure are arranged alternately.

[0069] Specifically, the outer periphery of the distribution plate is connected to the inner wall of the shell 1, and the distribution structure on the distribution plate is the same as the distribution structure on the distribution plate 602, and can have three different structural forms, namely, a structure with multiple distribution through holes, a structure in which the distribution plate is a slit mesh plate, and a distribution structure including multiple tubular distributors 617. Regardless of the structural form adopted, in order to improve the distribution and redistribution effects, 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.

[0070] In summary, when the isononanol hydroformylation reactor provided by the present 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, and a bubble generating device 7 is arranged in front of the reactant inlet 2, which can generate and regulate the size and number of bubbles; the gas-liquid reaction medium flows upward from the bottom of the reactor and hits the diffusion device 4 with an inverted umbrella-shaped baffle 401, and the baffle 401 has no less than 20 through holes to timely buffer and disperse the incoming flow; the gas-liquid reaction medium passing through the diffusion device 4 passes upward through the distribution device 5 for uniform dispersion; then the gas-liquid reaction medium passes through the heat exchange distribution structure 6, and heat is taken through a plurality of heat exchange tubes 601 of a sleeve-type structure to reach the required temperature for the reaction, and is redistributed through the distribution plate 602, so as to further improve the uniformity and stability of mass transfer, realize stable and uniform distribution of gas and liquid in the reactor, improve the reaction conversion rate, and avoid the occurrence of back mixing; the gas-liquid reaction medium that has reacted completely leaves the reactor from the reactant outlet 3 located on the upper side wall of the reactor.

[0071] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An isononanol hydroformylation reactor, characterized in that: include: A shell, wherein a reactant inlet is disposed at the lower portion of the shell, and a reactant outlet is disposed on the upper side wall of the shell; a diffusion device, disposed inside the shell and above the reactant inlet, for dispersing the gaseous and liquid reaction medium entering the shell through the reactant inlet; A distribution device, arranged inside the shell and above the diffusion device, and spaced apart from the diffusion device, for uniformly distributing the gas-liquid reaction medium; A heat exchange distribution structure is arranged inside the shell and above the distribution device, and is spaced apart from the distribution device. The heat exchange distribution structure includes a plurality of heat exchange tubes and at least one distribution plate. The axes of the plurality of heat exchange tubes are parallel to each other. The plurality of heat exchange tubes are distributed in a ring shape along a plurality of concentric virtual circles. The distribution plate is provided with a plurality of positioning through holes and a distribution structure. The plurality of heat exchange tubes are respectively passed through the plurality of positioning through holes.

2. The isononanol hydroformylation reactor according to claim 1, characterized in that: The diffusion device comprises a baffle and a plurality of connecting parts, two ends of the plurality of connecting parts are respectively connected to the reactant inlet and the baffle, and the baffle is in the shape of an inverted umbrella.

3. The isononanol hydroformylation reactor according to claim 1, characterized in that: It also includes a bubble generating device, which is arranged outside the shell and connected to the reactant inlet. The bubble generating device is used to connect the gaseous reaction medium pipeline and the liquid reaction medium pipeline. A porous medium is arranged in the bubble generating device, and the gaseous reaction medium can enter the liquid reaction medium through the porous medium.

4. The isononanol hydroformylation reactor according to claim 1, characterized in that: It also includes a defoaming wire mesh, which is arranged inside the shell and above the heat exchange distribution structure.

5. The isononanol hydroformylation reactor according to claim 1, characterized in that: The heat exchange tube includes an inner tube and an outer tube, and the two ends of the outer tube are respectively provided with a first sealing plate and a second sealing plate. One end of the inner tube is inserted into the outer tube and forms a first gap with the first sealing plate. The other end of the inner tube passes through the second sealing plate and extends outward to form an extension portion. The outer end of the extension portion forms a heat exchange medium inlet. A heat exchange medium outlet is opened on the outer wall of the outer tube.

6. The isononanol hydroformylation reactor according to claim 5, characterized in that: The heat exchange distribution structure also includes a first fixed baffle and a second fixed baffle connected to the inner wall of the shell at the outer periphery, the first fixed baffle is connected to the extension portion, the second fixed baffle is connected to the outer tube, a heat exchange medium inlet space is formed on the side of the first fixed baffle away from the second fixed baffle, a heat exchange medium outflow space is formed between the first fixed baffle and the second fixed baffle, the heat exchange medium inlet and the heat exchange medium outlet are respectively located in the heat exchange medium inlet space and the heat exchange medium outflow space, a cover plate is provided on the top of the heat exchange medium inlet space, a heat exchange medium pipeline is connected to the cover plate, a heat exchange medium total inlet connected to the heat exchange medium pipeline is provided on the top of the shell, and a heat exchange medium total outlet connected to the heat exchange medium outflow space is provided on the upper side wall of the shell.

7. The isononanol hydroformylation reactor according to claim 1, characterized in that: The distribution structure includes a plurality of distribution through holes, and the plurality of distribution through holes are opened on the distribution plate.

8. The isononanol hydroformylation reactor according to claim 1, characterized in that: The distribution plate is a slit mesh plate, and the slits and / or mesh holes of the slit mesh plate form the distribution structure.

9. The isononanol hydroformylation reactor according to claim 1, characterized in that: The distribution structure includes a plurality of tubular distributors, a plurality of mounting holes are provided on the distribution plate, and the plurality of tubular distributors are respectively installed on the reaction medium inflow side of the distribution plate through the plurality of mounting holes. The tubular distributor includes a tube body and a buffer plate, one end of the tube body is connected to the mounting hole, a plurality of flow through holes are provided on the outer wall of the tube body, a plurality of connecting pins are arranged at intervals on the outer periphery of the buffer plate, and the buffer plate is connected to the tube body through the connecting pins.

10. The isononanol hydroformylation reactor according to any one of claims 7 to 9, characterized in that: The distribution device comprises a distribution plate, on which a distribution structure is arranged. The distribution structure has the same structure as the distribution structure and the distribution structure is arranged alternately.

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