Production device for hydroformylation reaction
By installing an ultrafiltration membrane assembly and a flow guide tube inside the hydroformylation reactor, combined with a degassing tower and a distillation tower, the problem of separating the catalyst from the reaction liquid was solved, enabling the recycling of the catalyst and reducing energy consumption, and improving the raw material recovery rate.
Patent Information
- Application Number
- CN202422523689.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-18
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-10-18
AI Technical Summary
In the prior art, the separation of homogeneous catalysts from the reaction liquid is difficult, which leads to easy deactivation of the catalyst and high energy consumption. Furthermore, the separation of the catalyst from the substrate remains a challenge in homogeneous reactions.
The catalyst is separated from the reaction liquid by an ultrafiltration membrane module in the reactor. Combined with a degassing tower and a distillation tower, the catalyst can be recycled. The catalyst is separated from the reaction liquid by the ultrafiltration membrane module, and the separation process is carried out under conditions that do not require heating. Combined with the design of the guide tube and nozzle, the gas-liquid contact area is increased and the mass transfer efficiency is improved.
It achieves efficient separation of catalyst and reaction liquid, reduces energy consumption, reduces catalyst loss, improves raw material recovery rate, and allows the catalyst to be recycled.
Smart Images
Figure CN223505265U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of chemical production equipment, and in particular relates to a production device for hydroformylation reaction. Background Technology
[0002] Hydroformylation, also known as carbonyl synthesis, is an organic chemical reaction in which an olefin reacts with carbon monoxide and hydrogen under the action of a catalyst to produce an aldehyde with one more carbon atom than the starting olefin. Hydroformylation is an important organic synthesis technique, mainly used to prepare long-chain aldehydes. This reaction has advantages such as high atom economy, good selectivity, and easy further conversion of the product, and has wide applications in petrochemicals, fine chemicals, and other fields. In recent years, with the rapid development of the chemical industry and the increasing environmental protection requirements, the research and application of hydroformylation have received increasing attention.
[0003] Homogeneous catalysis allows for sufficient contact between the substrate and catalyst, resulting in high catalytic efficiency. Developing homogeneous catalytic systems and low-pressure synthesis processes is a crucial research direction in hydroformylation. However, separating the catalyst from the reaction liquid in homogeneous catalytic systems remains challenging. Currently, industrial processes still rely on distillation to separate the catalyst. For example, patent CN115028520A discloses a method and apparatus for separating hydroformylation reaction products, which uses a five-stage distillation column to separate the reaction liquid, thereby achieving the separation of light and heavy components. Multi-stage distillation columns can effectively separate aldehydes, alcohols, heavy oils, and phosphorus-containing heavy substances, improving product recovery rates. However, they consume a lot of energy, and the catalyst is prone to deactivation during distillation. Therefore, separating the catalyst from the substrate remains a challenge in homogeneous reactions. Utility Model Content
[0004] This invention provides a production apparatus for hydroformylation reaction. The production apparatus provided by this invention can not only effectively separate the catalyst from the reaction liquid without heating during the separation process, but also allows the catalyst to be recycled and effectively reduces energy consumption.
[0005] To achieve the above objectives, this utility model provides a production apparatus for a hydroformylation reaction, comprising:
[0006] Reactor;
[0007] The lower part of the reactor is provided with an ultrafiltration membrane assembly that matches the inner wall of the reactor, and the ultrafiltration membrane assembly divides the reactor into an upper chamber and a lower chamber; a feed pipe is provided at the bottom of the reactor, and the feed pipe passes through the ultrafiltration membrane assembly and extends into the upper chamber of the reactor;
[0008] Degassing tower;
[0009] The degassing tower is connected with the reaction liquid outlet on the lower chamber of the reaction kettle through a reaction liquid discharge pipeline; and the degassing tower is connected with the feed pipe of the reaction kettle through a gas recovery pipeline;
[0010] Rectification tower;
[0011] The rectification tower is connected with the discharge port of the degassing tower through a degassing tower discharge pipeline; and the rectification tower is connected with the feed pipe of the reaction kettle through an olefin recovery pipeline.
[0012] Preferably, a nozzle is arranged in the feed pipe, and the nozzle extends into the upper chamber of the reaction kettle through the ultrafiltration membrane assembly.
[0013] Preferably, a draft tube is arranged in the upper chamber of the reaction kettle; the bottom of the draft tube is not connected with the ultrafiltration membrane assembly, and the axis of the draft tube and the axis of the feed pipe are on a straight line.
[0014] Preferably, the inner diameter of the draft tube is greater than the inner diameter of the feed pipe.
[0015] Preferably, the ultrafiltration membrane assembly is composed of a ceramic shell and an ultrafiltration membrane arranged in the ceramic shell.
[0016] Preferably, the ultrafiltration membrane has a molecular weight cut-off range of 1000-5000 Da.
[0017] Preferably, the ultrafiltration membrane assembly is detachably arranged in the reaction kettle.
[0018] Preferably, a clamping groove is arranged in the reaction kettle, and the ultrafiltration membrane assembly is fixed in the reaction kettle through the clamping groove.
[0019] Preferably, a product storage tank is further arranged and connected with the discharge port of the rectification tower through a product discharge pipeline.
[0020] Preferably, a feed pump and a valve are arranged on each pipeline.
[0021] Compared with the prior art, the production device for hydroformylation reaction has the following advantages and positive effects:
[0022] The production device for hydroformylation reaction comprises a reaction kettle, a degassing tower and a rectification tower, and an ultrafiltration membrane assembly is arranged in the reaction kettle; the catalyst and the reaction liquid are separated in the reaction kettle, the separation process does not need heating, the catalyst is directly left in the reaction kettle, and no additional purification is needed.
[0023] Further, a nozzle is arranged in the feeding pipe, and a flow guide cylinder is arranged in the upper chamber of the reaction kettle, liquid is sprayed into the reaction kettle at high speed, the liquid forms regular circulation under the action of the flow guide cylinder, the breaking of bubbles is increased, the gas-liquid contact area is increased, and the mass transfer efficiency is increased.
[0024] Further, the ultrafiltration membrane assembly is detachably arranged in the reaction kettle, can be individually detached, and can be directly replaced after the filter membrane is blocked, thereby being convenient to flush. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 A structure schematic view of the production device for the hydroformylation reaction is provided in the utility model.
[0026] Figure 2 An internal structure schematic view of the reaction kettle is provided in the utility model.
[0027] Figure 3 A structure schematic view of the internal cross section of the reaction kettle is provided in the utility model.
[0028] Figure 4 A structure schematic view of the ultrafiltration membrane assembly is provided in the utility model.
[0029] 1-reaction kettle, 2-ultrafiltration membrane assembly, 3-upper chamber, 4-lower chamber, 5-feeding pipe, 6-degassing tower, 7-reaction liquid discharge pipeline, 8-gas recovery pipeline, 9-distillation tower, 10-degassing tower discharge pipeline, 11-olefin recovery pipeline, 12-nozzle, 13-flow guide cylinder, 14-ceramic shell, 15-ultrafiltration membrane, 16-storage tank, 17-finished product discharge pipeline, 18-strut. DETAILED DESCRIPTION
[0030] The technical scheme in the embodiments of the utility model will be clearly and completely described below, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.
[0031] As shown in Figures 1 to 4 The utility model provides a kind of production device for hydrogen formylation reaction, comprising:
[0032] Reaction kettle 1;
[0033] The lower part of the reaction kettle 1 is provided with ultrafiltration membrane assembly 2 that is consistent with the inner wall of the reaction kettle, and the ultrafiltration membrane assembly 2 divides the reaction kettle 1 into upper chamber 3 and lower chamber 4;The bottom of the reaction kettle 1 is provided with feeding pipe 5, and the feeding pipe 5 passes through ultrafiltration membrane assembly 2 and extends into the upper chamber 3 of the reaction kettle 1.
[0034] a degassing tower 6;
[0035] The degassing tower 6 is connected with the reaction liquid outlet on the lower chamber 4 of the reaction kettle 1 through a reaction liquid discharge pipeline 7; the degassing tower 6 is connected with the feed pipeline 5 of the reaction kettle 1 through a gas recovery pipeline 8;
[0036] a rectifying tower 9;
[0037] The rectifying tower 9 is connected with the discharge port of the degassing tower 6 through a degassing tower discharge pipeline 10; the rectifying tower 9 is connected with the feed pipeline 5 of the reaction kettle 1 through an olefin recovery pipeline 11.
[0038] In operation, the olefin raw material, the catalyst and the synthesis gas enter the upper chamber 3 of the reaction kettle 1 through the feed pipeline to react. The small molecules such as aldehyde products and unreacted olefin raw material in the reaction liquid pass through the ultrafiltration membrane, while the macromolecular catalyst cannot pass through and remains in the upper chamber 3 of the reaction kettle 1 to continue the catalytic reaction. The reaction liquid passing through the ultrafiltration assembly 2 enters the degassing tower 6, the dissolved synthesis gas in the reaction liquid is separated in the tower and returns to the reaction kettle 1, and the degassed solution enters the rectifying tower 9, in which the unreacted olefin is separated from the aldehyde products, and the olefin returns to the reaction kettle 1. The catalyst remains in the reaction kettle 1 and does not participate in the subsequent high-temperature rectification, thereby reducing the loss of the catalyst and recovering the unreacted synthesis gas and the olefin raw material, thereby reducing the loss of raw materials.
[0039] In the utility model, further, as shown in Figure 2 The feed pipeline 5 is provided with a nozzle 12, and the nozzle 12 extends into the upper chamber 3 of the reaction kettle 1 through the ultrafiltration membrane assembly 2.
[0040] In the utility model, further, the upper chamber 3 of the reaction kettle 1 is provided with a flow guide cylinder 13; the bottom of the flow guide cylinder 13 is not connected with the ultrafiltration membrane assembly 2, and the axis of the flow guide cylinder 13 and the axis of the feed pipeline 5 are on a straight line.
[0041] In the utility model, further, the inner diameter of the flow guide cylinder 13 is greater than the inner diameter of the feed pipeline 5.
[0042] In the utility model, the liquid olefin can be sprayed into the reaction kettle 1 at high speed by arranging the nozzle 12 in the feed pipeline 5, and the liquid forms regular circulation under the action of the flow guide cylinder 13, which increases the breaking of the gas bubbles, increases the gas-liquid contact area and increases the mass transfer efficiency.
[0043] The utility model does not have special limitation on the specific structure of the flow guide cylinder 13, and the conventional structure in the field can be adopted, and the flow guide cylinder in the utility model embodiment is a cylindrical structure, which is connected with the side wall of the reaction kettle 1 through a support 18, as shown in Figure 2 and 3As shown.
[0044] In the utility model, further, as Figure 4 As shown, the ultrafiltration membrane assembly 2 is composed of a ceramic shell 14 and an ultrafiltration membrane 15 arranged inside the ceramic shell 14. The molecular weight cut-off range of the ultrafiltration membrane 15 is preferably 1000-5000 Da.
[0045] In the utility model, further, the ultrafiltration membrane assembly 2 is detachably installed in the reaction kettle. The utility model sets the ultrafiltration membrane assembly 2 as a detachable structure, so that when the ultrafiltration membrane is contaminated or blocked, it can be simply taken down for cleaning or replacement.
[0046] In the utility model, further, a clamping groove is arranged in the reaction kettle, and the ultrafiltration membrane assembly 2 is fixed in the reaction kettle 1 through the clamping groove.
[0047] In the utility model, further, a finished product storage tank 16 is further arranged, which is connected with the discharge port of the rectifying tower through a finished product discharge pipeline 17. The utility model sets the finished product storage tank 16, which can facilitate the storage and transportation of finished products.
[0048] In the utility model, further, a feeding pump and a valve are arranged on each pipeline. The utility model sets the feeding pump and the valve, which can facilitate the conveying of materials and the control operation.
[0049] In order to further illustrate the utility model, the technical scheme provided by the utility model is described in detail below in combination with examples, but they should not be understood as limiting the protection scope of the utility model.
[0050] Example 1
[0051] In this example, octene alcohol is used as raw material for hydroformylation reaction.
[0052] The catalyst (macromolecular catalyst composed of phosphine ligand and rhodium) is dissolved in octene alcohol, the octene alcohol containing the catalyst and the synthetic gas are sprayed into the upper chamber of the reaction kettle through the feeding pipe and the nozzle at high speed, the liquid forms regular circular flow under the action of the draft tube, the breaking of the gas bubbles is increased, the gas-liquid contact area is increased, and the mass transfer efficiency is increased. The reaction product nonanal is passed through the ultrafiltration membrane assembly, and the macromolecular catalyst composed of rhodium and phosphine ligand cannot pass through and is intercepted in the upper chamber of the reaction kettle to continue the catalytic reaction. The filtrate passing through the ultrafiltration membrane assembly enters the degassing tower (the main components in the filtrate are the product nonanal, dissolved synthetic gas and unreacted octene alcohol) through the reaction liquid discharge pipeline, the separated synthetic gas returns to the reaction kettle through the gas recovery pipeline at the top of the tower, and the degassed liquid enters the rectifying tower through the degassing tower discharge pipeline at the bottom of the tower. The unreacted octene alcohol and the nonanal product are separated by rectification in the rectifying tower, the light component octene alcohol returns to the reaction kettle through the olefin recovery pipeline at the top of the tower, and the nonanal purification product is discharged from the bottom of the tower.
[0053] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.
Claims
1. A production apparatus for a hydroformylation reaction, characterized in that, The application relates to a reaction kettle and a production method thereof. The lower part of the reaction kettle is provided with an ultrafiltration membrane assembly matched with the inner wall of the reaction kettle, and the ultrafiltration membrane assembly divides the reaction kettle into an upper chamber and a lower chamber; the bottom of the reaction kettle is provided with a feeding pipe which penetrates through the ultrafiltration membrane assembly and extends into the upper chamber of the reaction kettle; A degassing tower is arranged; The degassing tower is connected with the reaction liquid outlet on the lower chamber of the reaction kettle through a reaction liquid discharge pipeline; and the degassing tower is connected with the feeding pipe of the reaction kettle through a gas recovery pipeline; A rectifying tower is arranged; The rectifying tower is connected with the discharge port of the degassing tower through a degassing tower discharge pipeline; and the rectifying tower is connected with the feeding pipe of the reaction kettle through an olefin recovery pipeline. A nozzle is arranged in the feeding pipe and penetrates through the ultrafiltration membrane assembly and extends into the upper chamber of the reaction kettle.
2. The production apparatus for a hydroformylation reaction according to claim 1, wherein A flow guide cylinder is arranged in the upper chamber of the reaction kettle; the bottom of the flow guide cylinder is not connected with the ultrafiltration membrane assembly, and the axis of the flow guide cylinder and the axis of the feeding pipe are on a straight line.
3. The production apparatus for a hydroformylation reaction according to claim 1, wherein The inner diameter of the flow guide cylinder is larger than the inner diameter of the feeding pipe.
4. The production apparatus for a hydroformylation reaction according to claim 3, wherein The ultrafiltration membrane assembly is composed of a ceramic shell and an ultrafiltration membrane arranged in the ceramic shell.
5. The production apparatus for a hydroformylation reaction according to claim 1, wherein The ultrafiltration membrane has a molecular weight cut-off range of 1000-5000 Da.
6. The production apparatus for a hydroformylation reaction according to claim 5, wherein The ultrafiltration membrane assembly is detachably arranged in the reaction kettle.
7. The production apparatus for a hydroformylation reaction according to claim 1, wherein A clamping groove is arranged in the reaction kettle, and the ultrafiltration membrane assembly is fixed in the reaction kettle through the clamping groove.
8. The production apparatus for a hydroformylation reaction according to claim 7, wherein A finished product storage tank is further arranged and connected with the discharge port of the rectifying tower through a finished product discharge pipeline.
9. The production apparatus for a hydroformylation reaction according to claim 1, wherein A feeding pump and a valve are arranged on each pipeline.
10. The production apparatus for a hydroformylation reaction according to claim 1, wherein