System for realizing nanoscale heterogeneous catalysis in microreactor by using sanding equipment

Abstract

The utility model discloses a system for realizing nanometer heterogeneous catalysis in micro -reactor with sand mill equipment, related to micro -reactor internal heterogeneous reaction technical field, the first import of plate type mixed micro -reactor is used for the export of front -treatment module intercommunication, and the second import is used for the export of raw material supply module intercommunication, and the front -treatment module is used for polishing solid catalyst, and makes solid catalyst and liquid additive mixed preparation containing catalyst's suspension liquid, and raw material supply module is used for containing reactant, and the plate type mixed micro -reactor is used for mixing the suspension liquid containing catalyst and reactant to obtain the mixed liquid of reaction product and catalyst and is transported to the settlement collection module, and the settlement collection module is used for the settlement separation of the mixed liquid of reaction product and catalyst. The utility model can realize the heterogeneous catalysis reaction in micro -reactor, strengthens the reaction performance, promotes the heterogeneous catalytic performance, avoids the phenomenon that the heterogeneous catalyst in micro -reactor is blocked.

Description

Technical Field

[0001] This invention relates to the field of heterogeneous reaction technology in microreactors, and in particular to a system for realizing nanoscale heterogeneous catalysis in microreactors using a sand milling device. Background Technology

[0002] Microreactor technology is an important branch of process intensification, characterized by the use of reaction devices with microchannel dimensions (typically on the micrometer to sub-millimeter scale). This unique structural design endows microreactors with a series of significant advantages, demonstrating great potential in fields such as chemical synthesis, new material development, and energy conversion. Their high-efficiency heat and mass transfer performance, precise process control, improved inherent safety of reactions, ability to achieve process intensification and continuous production, and ease of scale-up have enabled microreactors to be successfully applied in various fields, including homogeneous catalytic reactions, rapid mixing reactions, photochemistry, and electrochemistry.

[0003] However, the widespread application of microreactors in heterogeneous catalytic reactions (especially liquid-solid or gas-liquid-solid three-phase reactions involving solid catalysts) still faces significant technical challenges and limitations. Traditional particulate catalysts cannot be directly used in heterogeneous catalytic reactions due to microchannel blockage and high pressure drops, and existing alternatives all have serious drawbacks: the active component loading of the wall-supported coating is low and easily peels off and deactivates; structured supports are difficult to integrate with microchannels and are limited by thermal conductivity; catalyst refinement can alleviate blockage, but it inevitably causes an increase in the pressure drop of the reaction system as the reaction proceeds. These problems severely restrict the practical application of microreactors in heterogeneous catalytic processes such as hydrogenation and oxidation.

[0004] It is worth noting that heterogeneous catalysis itself has significant advantages: the spontaneous separation of the catalyst from the reaction system greatly simplifies the post-processing; the recyclability of solid catalysts effectively reduces production costs; and its broad applicability to gas-liquid-solid multiphase reactions can cover many key industrial processes. However, existing microreactor technology cannot fully leverage these advantages, making it difficult to apply the microchannel characteristics such as efficient mass transfer and precise temperature control to heterogeneous catalytic systems.

[0005] Therefore, how to overcome the technical adaptation barriers between microreactors and heterogeneous catalysis, and achieve synergistic effects of their respective advantages, has become a core issue that urgently needs to be addressed in this field. Utility Model Content

[0006] The purpose of this invention is to provide a system for realizing nanoscale heterogeneous catalysis in a microreactor using a sand milling device, so as to solve the problems existing in the prior art, realize heterogeneous catalytic reaction in a microreactor, enhance reaction performance, improve heterogeneous catalytic performance, and avoid the phenomenon of heterogeneous catalyst blockage in the microreactor.

[0007] To achieve the above objectives, this utility model provides the following solution: This invention provides a system for achieving nanoscale heterogeneous catalysis within a microreactor using a sand milling device. The system includes a pretreatment module, a raw material supply module, a plate-type mixing microreactor, and a sedimentation collection module. The first inlet of the plate-type mixing microreactor is connected to the outlet of the pretreatment module, and the second inlet is connected to the outlet of the raw material supply module. The pretreatment module is used for grinding a solid catalyst and mixing the solid catalyst with liquid additives to form a catalyst-containing suspension. The raw material supply module is used to hold the reactants, and the plate-type mixing microreactor is used to mix the catalyst-containing suspension and reactants to obtain a mixture of reaction products and catalyst, which is then transported to the sedimentation collection module. The sedimentation collection module is used to separate the reaction products and catalyst mixture by sedimentation.

[0008] Preferably, the pretreatment module includes a sand mill and a first delivery pump, which are connected by a pipeline. The sand mill is used to grind the solid catalyst and mix the solid catalyst with liquid additives to form a suspension containing the catalyst. The first delivery pump is connected to the first inlet of the plate-type mixing microreactor by a pipeline, and the first delivery pump is used to pass the suspension containing the catalyst prepared in the sand mill into the plate-type mixing microreactor.

[0009] Preferably, the liquid additive in the sand mill is a reactant or an inert solvent.

[0010] Preferably, the particle size of the solid catalyst after being milled by the sand mill is 30nm-80nm; the first delivery pump is a horizontal flow pump, and the flow rate adjustment range of the first delivery pump is 0-10ml / min.

[0011] Preferably, the raw material supply module includes a raw material storage tank and a second delivery pump. The raw material storage tank and the second delivery pump are connected by a pipeline. The raw material storage tank is used to hold reactants. The second delivery pump is connected by a pipeline to the second inlet of the plate-type mixing microreactor. The second delivery pump is used to pass the reactants in the raw material storage tank into the plate-type mixing microreactor.

[0012] Preferably, the raw material storage tank is made of stainless steel; the second delivery pump is a horizontal flow pump, and the flow rate adjustment range of the second delivery pump is 0-10 ml / min.

[0013] Preferably, the plate-type mixing microreactor includes a microreactor body, a first branch channel, a second branch channel, and a mixing channel. The first branch channel, the second branch channel, and the mixing channel are all located inside the microreactor body. One end of the first branch channel is the first inlet of the plate-type mixing microreactor, and the second end of the first branch channel is connected to the first end of the mixing channel. One end of the second branch channel is the second inlet of the plate-type mixing microreactor, and the second end of the second branch channel is connected to the first end of the mixing channel. The second end of the mixing channel is connected to the inlet of the sedimentation collection module.

[0014] Preferably, the first end of the mixing channel is located near one side of the plate-type mixing microreactor, the second end of the mixing channel is located near the other side of the plate-type mixing microreactor, and the mixing channel is a serpentine channel.

[0015] Preferably, the sedimentation collection module includes a back pressure valve and a sedimentation tank. The sedimentation tank is connected to the outlet of the plate-type mixing microreactor via a pipeline, and the back pressure valve is installed on the pipeline between the sedimentation tank and the plate-type mixing microreactor.

[0016] Preferably, the settling tank is made of stainless steel; the back pressure valve can adjust the pressure range of the system that uses a sand mill to achieve nanoscale heterogeneous catalysis in a microreactor to 0-1.5 MPa.

[0017] The present invention achieves the following technical advantages over the prior art: This invention provides a system for achieving nanoscale heterogeneous catalysis within a microreactor using a sand milling device. The system includes a pretreatment module, a raw material supply module, a plate-type mixing microreactor, and a sedimentation collection module. The first inlet of the plate-type mixing microreactor connects to the outlet of the pretreatment module, and the second inlet connects to the outlet of the raw material supply module, facilitating mixing of substances in the pretreatment and raw material supply modules via the plate-type mixing microreactor. The pretreatment module is used to mill the solid catalyst to reduce its particle size and prevent clogging of the microchannels in the plate-type mixing microreactor. The pretreatment module also mixes the solid catalyst with liquid additives to create a catalyst suspension, ensuring smooth flow of the solid catalyst. The raw material supply module is used for… The plate-type mixing microreactor is used to mix the catalyst-containing suspension and reactants to obtain a mixture of reaction products and catalyst, which is then transported to the sedimentation and collection module. Compared to directly adding solid catalysts into the plate-type mixing microreactor, by reducing the particle size of the solid catalyst and allowing the solid catalyst and reactants to move simultaneously within the plate-type mixing microreactor, the solid catalyst and reactants can be fully contacted and mixed. The sedimentation and collection module is used to separate the mixture of reaction products and catalyst, thereby collecting the reaction products. Ultimately, heterogeneous catalytic reactions can be carried out in the plate-type mixing microreactor, which not only enhances reaction performance and improves heterogeneous catalytic performance but also avoids the phenomenon of heterogeneous catalyst blockage in the plate-type mixing microreactor. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the system in this invention that utilizes a sand milling device to achieve nanoscale heterogeneous catalysis within a microreactor; Figure 2 This is a schematic diagram of the plate-type mixing microreactor of this utility model; In the diagram: 1-Sand mill, 2-Raw material storage tank, 3-First conveying pump, 4-Second conveying pump, 5-Plate mixing microreactor, 51-First inlet, 52-Second inlet, 53-Mixing channel, 54-First branch channel, 55-Second branch channel, 6-Back pressure valve, 7-Settling tank. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] The purpose of this invention is to provide a system for realizing nanoscale heterogeneous catalysis in a microreactor using a sand milling device, in order to solve the problems existing in the prior art, realize heterogeneous catalytic reactions in a microreactor, enhance reaction performance, improve heterogeneous catalytic performance, and avoid the phenomenon of heterogeneous catalyst blockage in the microreactor.

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1-2 As shown, this embodiment provides a system for achieving nanoscale heterogeneous catalysis within a microreactor using a sand milling device. The system includes a pretreatment module, a raw material supply module, a plate-type mixing microreactor 5, and a sedimentation and collection module. The first inlet 51 of the plate-type mixing microreactor 5 connects to the outlet of the pretreatment module, and the second inlet 52 connects to the outlet of the raw material supply module. This facilitates the mixing of substances in the pretreatment module and the raw material supply module through the plate-type mixing microreactor 5. The pretreatment module is used to grind the solid catalyst to reduce its particle size and prevent clogging of the microchannels in the plate-type mixing microreactor 5. The pretreatment module also mixes the solid catalyst with liquid additives to form a suspension containing the catalyst, ensuring smooth flow of the solid catalyst. The plate-type mixing microreactor 5 is used to hold reactants and mix the catalyst-containing suspension and reactants to obtain a mixture of reaction products and catalyst, which is then transported to the sedimentation and collection module. Compared to directly adding solid catalysts into the plate-type mixing microreactor 5, by reducing the particle size of the solid catalyst and allowing the solid catalyst and reactants to move simultaneously within the plate-type mixing microreactor 5, the solid catalyst and reactants can be fully contacted and mixed. The sedimentation and collection module is used to separate the mixture of reaction products and catalysts, thereby collecting the reaction products. Ultimately, heterogeneous catalytic reactions are achieved within the plate-type mixing microreactor 5, which not only enhances reaction performance and improves heterogeneous catalytic performance but also avoids the phenomenon of heterogeneous catalyst blockage within the plate-type mixing microreactor 5.

[0024] Specifically, the pretreatment module includes a sand mill 1 and a first delivery pump 3, which are connected by a pipeline. The sand mill 1 is used to grind the solid catalyst and mix the solid catalyst with liquid additives to form a suspension containing the catalyst. The first delivery pump 3 is connected by a pipeline to the first inlet 51 of the plate mixing microreactor 5, and is used to pass the suspension containing the catalyst prepared in the sand mill 1 into the plate mixing microreactor 5. The sand mill 1 is a Toppa HNM6.

[0025] The liquid additive in the mill 1 is a reactant or an inert solvent, and then the liquid additive (e.g., reactant) is milled and mixed with the solid catalyst to prepare a nanofluid.

[0026] The particle size of the solid catalyst after grinding by the sand mill 1 is 30nm-80nm; the first delivery pump 3 is a horizontal flow pump, and the flow rate adjustment range of the first delivery pump 3 is 0-10ml / min.

[0027] The raw material supply module includes a raw material storage tank 2 and a second transfer pump 4. The raw material storage tank 2 and the second transfer pump 4 are connected by a pipeline. The raw material storage tank 2 is used to hold reactants. The second transfer pump 4 is connected by a pipeline to the second inlet 52 of the plate mixing microreactor 5. The second transfer pump 4 is used to pass the reactants in the raw material storage tank 2 into the plate mixing microreactor 5.

[0028] The raw material storage tank 2 is made of stainless steel; the second transfer pump 4 is a horizontal flow pump, and the flow rate adjustment range of the second transfer pump 4 is 0-10 ml / min.

[0029] The plate-type mixing microreactor 5 includes a microreactor body, a first branch channel 54, a second branch channel 55, and a mixing channel 53. The first branch channel 54, the second branch channel 55, and the mixing channel 53 are all located inside the microreactor body. One end of the first branch channel 54 is the first inlet 51 of the plate-type mixing microreactor 5, and the second end of the first branch channel 54 is connected to the first end of the mixing channel 53. One end of the second branch channel 55 is the second inlet 52 of the plate-type mixing microreactor 5, and the second end of the second branch channel 55 is connected to the first end of the mixing channel 53. The substances at the first inlet 51 and the second inlet 52 are then introduced into the mixing channel 53 and fully mixed. The second end of the mixing channel 53 is connected to the inlet of the sedimentation collection module to collect the reaction products.

[0030] The first end of the mixing channel 53 is located near one side of the plate mixing microreactor 5, and the second end of the mixing channel 53 is located near the other side of the plate mixing microreactor 5. The mixing channel 53 is a serpentine channel, which can extend the reaction path and make the solid catalyst and reactants fully mixed.

[0031] The sedimentation collection module includes a back pressure valve 6 and a sedimentation tank 7. The sedimentation tank 7 is connected to the outlet of the plate mixing microreactor 5 through a pipeline, and the back pressure valve 6 is installed on the pipeline between the sedimentation tank 7 and the plate mixing microreactor 5. After the reaction is completed, the solid catalyst and the reaction products flow out of the plate mixing microreactor 5 together, which fundamentally avoids the clogging of the plate mixing microreactor 5, and the catalyst can be easily recovered by centrifugation or filtration.

[0032] The settling tank 7 is made of stainless steel; the back pressure valve 6 can adjust the pressure range of the system that uses sand milling equipment to achieve nanoscale heterogeneous catalysis in the microreactor to 0-1.5 MPa.

[0033] When performing heterogeneous catalytic reactions using the system in this embodiment that utilizes a sand mill to achieve nanoscale heterogeneous catalysis within a microreactor, a solid catalyst and one of the reaction solutions or an inert solvent are passed through a sand mill 1 to obtain a catalyst-containing reactant suspension, which is then fed into a plate-type mixing microreactor 5 via a first transfer pump 3. The remaining reaction solution of the reaction system is fed into the plate-type mixing microreactor 5 via a second transfer pump 4. In the plate-type mixing microreactor 5, all mixtures and the solid catalyst are thoroughly mixed. The solid catalyst and reactants flow together into the plate-type mixing microreactor 5 and move while reacting. After the reaction is completed, the solid catalyst and reaction products flow out of the plate-type mixing microreactor 5 together and settle and separate in a settling tank 7.

[0034] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A system for achieving nanoscale heterogeneous catalysis within a microreactor using a sand milling device, characterized in that: The device includes a pretreatment module, a raw material supply module, a plate-type mixing microreactor, and a sedimentation collection module. The first inlet of the plate-type mixing microreactor is connected to the outlet of the pretreatment module, and the second inlet of the plate-type mixing microreactor is connected to the outlet of the raw material supply module. The pretreatment module is used to grind the solid catalyst and mix the solid catalyst with liquid additives to form a suspension containing the catalyst. The raw material supply module is used to hold the reactants, and the plate-type mixing microreactor is used to mix the suspension containing the catalyst and the reactants to obtain a mixture of reaction products and catalyst, which is then transported to the sedimentation collection module. The sedimentation collection module is used to separate the mixture of reaction products and catalyst by sedimentation.

2. The system for realizing nanoscale heterogeneous catalysis in a microreactor using a sand milling device according to claim 1, characterized in that: The pretreatment module includes a sand mill and a first delivery pump, which are connected by a pipeline. The sand mill is used to grind the solid catalyst and mix the solid catalyst with liquid additives to form a suspension containing the catalyst. The first delivery pump is connected to the first inlet of the plate-type mixing microreactor by a pipeline and is used to pass the suspension containing the catalyst prepared in the sand mill into the plate-type mixing microreactor.

3. The system for realizing nanoscale heterogeneous catalysis in a microreactor using a sand milling device according to claim 2, characterized in that: The liquid additives in the sand mill are reactants or inert solvents.

4. The system for realizing nanoscale heterogeneous catalysis in a microreactor using a sand milling device according to claim 2, characterized in that: The particle size of the solid catalyst after being ground by the sand mill is 30nm-80nm; the first delivery pump is a horizontal flow pump, and the flow rate adjustment range of the first delivery pump is 0-10ml / min.

5. The system for realizing nanoscale heterogeneous catalysis in a microreactor using a sand milling device according to claim 1, characterized in that: The raw material supply module includes a raw material storage tank and a second delivery pump. The raw material storage tank and the second delivery pump are connected by a pipeline. The raw material storage tank is used to hold reactants. The second delivery pump is connected by a pipeline to the second inlet of the plate-type mixing microreactor. The second delivery pump is used to introduce the reactants from the raw material storage tank into the plate-type mixing microreactor.

6. The system for realizing nanoscale heterogeneous catalysis in a microreactor using a sand milling device according to claim 5, characterized in that: The raw material storage tank is made of stainless steel; the second delivery pump is a horizontal flow pump, and the flow rate adjustment range of the second delivery pump is 0-10 ml / min.

7. The system for realizing nanoscale heterogeneous catalysis in a microreactor using a sand milling device according to claim 1, characterized in that: The plate-type mixing microreactor includes a microreactor body, a first branch channel, a second branch channel, and a mixing channel. The first branch channel, the second branch channel, and the mixing channel are all located inside the microreactor body. One end of the first branch channel is the first inlet of the plate-type mixing microreactor, and the second end of the first branch channel is connected to the first end of the mixing channel. One end of the second branch channel is the second inlet of the plate-type mixing microreactor, and the second end of the second branch channel is connected to the first end of the mixing channel. The second end of the mixing channel is connected to the inlet of the sedimentation collection module.

8. The system for realizing nanoscale heterogeneous catalysis in a microreactor using a sand milling device according to claim 7, characterized in that: The first end of the mixing channel is located near one side of the plate-type mixing microreactor, and the second end of the mixing channel is located near the other side of the plate-type mixing microreactor. The mixing channel is a serpentine channel.

9. The system for realizing nanoscale heterogeneous catalysis in a microreactor using a sand milling device according to claim 1, characterized in that: The sedimentation collection module includes a back pressure valve and a sedimentation tank. The sedimentation tank is connected to the outlet of the plate-type mixing microreactor via a pipeline, and the back pressure valve is installed on the pipeline between the sedimentation tank and the plate-type mixing microreactor.

10. The system for realizing nanoscale heterogeneous catalysis in a microreactor using a sand milling device according to claim 9, characterized in that: The settling tank is made of stainless steel; the back pressure valve can adjust the pressure range of the system that uses sand milling equipment to achieve nanoscale heterogeneous catalysis in the microreactor to 0-1.5 MPa.

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