Tantalum micro-reaction channel

Abstract

The invention relates to a tantalum micro-reaction channel which comprises a feed port, a reaction unit and a discharge port, the reaction unit comprises more than two reactors which are connected in series and / or in parallel through a connecting channel, the reactors are spherical or ellipsoidal, inlets and outlets of the reactors are coaxially arranged with the reactors, and the discharge port is communicated with the discharge port. The distance between the inlet and the outlet of the reactor is L, and the direction from the inlet to the outlet of the reactor is taken as a first direction; a first spoiler and a second spoiler are arranged in each reactor, and the first spoiler and the second spoiler are oppositely arranged on the two sides of the axis of the reactor. According to the tantalum micro-reaction channel, the first spoiler and the second spoiler are arranged to limit the positions of the spoilers at the same time, materials are forced to be subjected to fluid shunting collision in the reactor, and vortex formed by the spherical curved surface is matched, so that the mixing efficiency is improved, the reaction is ensured to be fully carried out, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the chemical field and the field of 3D printing of tantalum metal, in particular, to a tantalum micro-reaction channel. BACKGROUND

[0002] In today's technological development, micro-reaction channels play an increasingly important role in the fields of chemical synthesis, biological analysis, drug research, etc. As a device that relies on micro-reaction channels to carry out chemical reactions, micro-channel reactors have significant advantages: they are compact in structure, have high heat and mass transfer capabilities, and can precisely control reaction conditions; the fluid flow inside the reactor is uniform, and the mixing effect is excellent, which is conducive to improving the selectivity and conversion rate of the reaction; at the same time, it adopts modular design, which is flexible and convenient for scale-up or scale-down, suitable for different scenes from laboratory research to industrial production. In addition, it also has the characteristics of high safety and environmental friendliness, and is an important innovative technology in modern chemical industry.

[0003] Traditional micro-reaction channels are difficult to apply to harsh reaction conditions such as high temperature and strong corrosion, therefore, the present application is proposed. SUMMARY

[0004] The purpose of the present application is to provide a tantalum micro-reaction channel that can meet the use requirements in extreme conditions such as strong acid, strong base, and ultra-high temperature.

[0005] In order to achieve the above purpose: The present application provides a tantalum micro-reaction channel, which comprises a feed inlet, a reaction unit and a discharge outlet, the reaction unit comprises two or more reactors connected in series and / or parallel through connecting channels, the reactors are spherical or ellipsoidal, the inlet and outlet of the reactor are coaxially arranged with the reactor, and the distance between the inlet and outlet of the reactor is L, and the direction from the inlet to the outlet of the reactor is the first direction; a first spoiler and a second spoiler are arranged in each reactor, and the first spoiler and the second spoiler are oppositely arranged on both sides of the axis of the reactor; The distance between the end of the first spoiler connected with the inner wall of the corresponding reactor and the inlet in the first direction is A, and the L and A satisfy: A / L = 1 / 3-1 / 4; The distance between the end of the first spoiler away from the inner wall of the corresponding reactor and the inlet in the first direction is B, and the L and B satisfy: B / L = 2 / 5-3 / 5; The distance between the end of the second spoiler connected with the inner wall of the corresponding reactor and the inlet in the first direction is C, and the L and C satisfy: C / L = 2 / 5-3 / 5; The distance between the end of the second spoiler away from the corresponding reactor inner wall and the inlet in the first direction is D, and the L and D satisfy: D / L=2 / 3-3 / 4.

[0006] In an optional embodiment, the width of the reactor in the direction perpendicular to the first direction is W, the first spoiler is coaxially arranged with one symmetry axis of the reactor and has a width E, and the W and E satisfy: E / W=1 / 3-1 / 2.

[0007] In an optional embodiment, the width of the reactor in the direction perpendicular to the first direction is W, the second spoiler is coaxially arranged with one symmetry axis of the reactor and has a width E, and the W and E satisfy: E / W=1 / 3-1 / 2.

[0008] In an optional embodiment, the angle between the end of the first spoiler connected with the corresponding reactor inner wall and the tangent of the reactor inner wall at the position is 30°-60°. And / or, the angle between the end of the first spoiler away from the corresponding reactor inner wall and the corresponding reactor axis is 30°-60°.

[0009] In an optional embodiment, the angle between the end of the second spoiler connected with the corresponding reactor inner wall and the tangent of the reactor inner wall at the position is 30°-60°. And / or, the angle between the end of the second spoiler away from the corresponding reactor inner wall and the corresponding reactor axis is 30°-60°.

[0010] In an optional embodiment, the feeding inlet is sequentially connected with a connecting channel and a Y-shaped feeder.

[0011] In an optional embodiment, at least two reactors are connected through a flow channel turning unit, and the flow channel turning unit comprises a connecting channel and an elbow pipe connected with each other, and the curvature radius of the elbow pipe is equal to the length of the connecting channel.

[0012] In an optional embodiment, the reaction unit comprises two or more sub-units, each of the sub-units comprises two or more reactors connected in series and / or in parallel through a connecting channel, and the two or more sub-units are connected in series and / or in parallel.

[0013] In an optional embodiment, the tantalum micro-reaction channel is an integrally formed structure.

[0014] In an optional embodiment, the tantalum micro-reaction channel is processed by using a selective laser melting technology or an electron beam selective melting technology with tantalum powder as raw material.

[0015] In this application, the tantalum micro-reaction channel defines the position of the turbulence plate by setting a first turbulence plate and a second turbulence plate. The material is forced to flow and collide in the reactor. Combined with the vortex formed by the spherical curved surface, it is beneficial to improve the mixing efficiency, ensure that the reaction is fully carried out, and reduce maintenance costs.

[0016] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of one structure of the tantalum microreaction channel of this application; Figure 2 This is a cross-sectional view of a structure of the tantalum microreaction channel of this application.

[0019] Icons: 100 - Reactor; 110 - First baffle; 120 - Second baffle; 200 - Connecting channel; 300 - Y-shaped feeder; 400 - Bend. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] This application provides a tantalum microreaction channel, such as... Figure 1 and 2 As shown, the reactor includes an inlet, a reaction unit, and an outlet. The reaction unit includes two or more reactors 100 connected in series and / or in parallel via a connecting channel 200. The reactors 100 are spherical or ellipsoidal. The inlet and outlet of each reactor 100 are coaxially arranged with respect to the reactor 100, and the distance between the inlet and outlet of the reactor 100 is L, with the direction from the inlet to the outlet of the reactor 100 as the first direction. Each reactor 100 is provided with a first baffle 110 and a second baffle 120, which are arranged opposite to each other on both sides of the axis of the reactor 100. The distance between the end of the first baffle 110 connected to the inner wall of the corresponding reactor 100 and the inlet in the first direction is A, and L and A satisfy: A / L=1 / 3-1 / 4; The distance between the end of the first baffle 110 away from the inner wall of the corresponding reactor 100 and the inlet in the first direction is B, and L and B satisfy: B / L=2 / 5-3 / 5; The distance between the end of the second baffle 120 connected to the inner wall of the corresponding reactor 100 and the inlet in the first direction is C, and L and C satisfy: C / L=2 / 5-3 / 5; The distance between the end of the second baffle 120 away from the inner wall of the corresponding reactor 100 and the inlet in the first direction is D, and L and D satisfy: D / L=2 / 3-3 / 4.

[0024] When handling harsh reaction conditions such as high temperature and strong corrosion, tantalum microreactors place extremely high demands on the performance of their constituent materials. Tantalum, as a typical refractory metal, has a melting point as high as 2996℃ and exhibits excellent chemical stability and corrosion resistance, withstanding the erosion of various strong acids and alkalis. This meets the requirements of tantalum microreactors under extreme conditions, demonstrating significant value in improving the durability of reactor 100 and expanding its application range. Furthermore, tantalum's high heat transfer efficiency facilitates precise temperature control of the reaction.

[0025] In this application, the tantalum micro-reaction channel limits the position of the baffles by setting the first baffle 110 and the second baffle 120. The material is forced to flow and collide in the reactor 100. Combined with the vortex formed by the spherical curved surface, it is beneficial to improve the mixing efficiency, ensure the reaction is fully carried out, and reduce maintenance costs.

[0026] In an optional embodiment, the reactor 100 has a width of W perpendicular to the first direction, the first baffle 110 is coaxially arranged with one axis of symmetry of the reactor 100 and has a width of E, and W and E satisfy: E / W=1 / 3-1 / 2.

[0027] In an optional embodiment, the reactor 100 has a width of W perpendicular to the first direction, and the second baffle 120 is coaxially arranged with one axis of symmetry of the reactor 100 and has a width of E, and W and E satisfy: E / W=1 / 3-1 / 2.

[0028] It should be noted that L and W in this application are calculated as the distance between the inner walls of reactor 100; since the first baffle 110 and the second baffle 120 have a certain thickness, usually not exceeding W / 20, A, B, C, D, and W are calculated as the distance between the middle of the corresponding position of the baffle and the inlet; where E is a third direction perpendicular to both L and W.

[0029] In an optional embodiment, the angle between the end of the first baffle 110 connected to the inner wall of the corresponding reactor 100 and the tangent of the inner wall of the reactor 100 at that location is 30°-60°. And / or, the angle between the end of the first baffle 110 away from the inner wall of the corresponding reactor 100 and the axis of the corresponding reactor 100 is 30°-60°.

[0030] Preferably, the end of the first baffle 110, i.e. the end of the first baffle 110 away from the inner wall of the corresponding reactor 100, is inclined towards the axis of the reactor 100, which is more conducive to improving the mixing effect than a flat plate structure.

[0031] In an optional embodiment, the angle between the end of the second baffle 120 connected to the inner wall of the corresponding reactor 100 and the tangent of the inner wall of the reactor 100 at that location is 30°-60°. And / or, the angle between the end of the second baffle 120 away from the inner wall of the corresponding reactor 100 and the axis of the corresponding reactor 100 is 30°-60°.

[0032] Preferably, the end of the second baffle 120, i.e. the end of the second baffle 120 away from the inner wall of the corresponding reactor 100, is inclined towards the axis of the reactor 100, which is more conducive to improving the mixing effect than a flat plate structure.

[0033] In an optional embodiment, the feed inlet is sequentially connected to a connecting channel 200 and a Y-shaped feeder 300, which can enable the simultaneous feeding of two materials.

[0034] In an optional embodiment, at least two reactors 100 are connected by a flow channel deflection unit, which includes an interconnecting connecting channel 200 and a bend 400, the radius of curvature of the bend 400 being equal to the length of the connecting channel 200. This facilitates adjusting the placement of the reactors 100 according to site conditions.

[0035] In an optional embodiment, the reaction unit includes two or more sub-units, each of which includes two or more reactors 100 connected in series and / or in parallel via a connection channel 200, and the two or more sub-units are connected in series and / or in parallel.

[0036] When it is necessary to increase production and improve efficiency, parallel sub-units can be added. If it is necessary to extend the residence time of materials in the tantalum micro-reaction channel, the number of series sub-units can be increased.

[0037] In an optional embodiment, the tantalum microreaction channel is a one-piece molded structure.

[0038] In an optional embodiment, the tantalum microreaction channel is obtained by using tantalum powder as raw material and processing it using selective laser melting technology or electron beam selective melting technology.

[0039] Tantalum microreaction channels are fabricated using selective laser melting (SLM) or electron beam selective melting (EBLM), eliminating the need for complex photolithography and etching processes, thus reducing fabrication costs and time. Simultaneously, the modular design reduces equipment replacement costs and adapts to various applications from laboratory research to industrial production. Furthermore, the seamless structure avoids the risk of media leakage, and the material itself exhibits high chemical stability, preventing secondary reactions with the reaction system and meeting environmental protection requirements.

[0040] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0041] Example 1 This embodiment provides a tantalum microreaction channel, the structure of which is as follows: Figure 1As shown, specifically, the tantalum micro-reaction channel is printed using spherical tantalum powder with a purity of 99.95%. The Y-shaped feeder 300 has an inner diameter of 500 μm and includes 15 reactors 100 connected in series. Each reactor 100 is spherical with an inner diameter of 8 mm. The distance between the inlet and outlet of each reactor 100 is L, with the direction from the inlet to the outlet of the reactor 100 as the first direction. A first baffle 110 and a second baffle 120 are provided inside each reactor 100, and the first baffle 110 and the second baffle 120 are arranged opposite each other on both sides of the axis of the reactor 100. The distance between the end of the first baffle 110 connected to the inner wall of the corresponding reactor 100 and the inlet in the first direction is A, and L and A satisfy: A / L=1 / 3; The distance between the end of the first baffle 110 away from the inner wall of the corresponding reactor 100 and the inlet in the first direction is B, and L and B satisfy: B / L=1 / 2; The distance between the end of the second baffle 120 connected to the inner wall of the corresponding reactor 100 and the inlet in the first direction is C, and L and C satisfy: C / L=1 / 2; The distance between the end of the second baffle 120 away from the inner wall of the corresponding reactor 100 and the inlet in the first direction is D, and the distance between L and D satisfies: D / L=2 / 3; The first baffle 110 and the second baffle 120 are coaxial with one axis of symmetry of the reactor 100 (along a third-direction axis) and both have a width of E, and the W and E satisfy: E / W=5 / 12; The reactor 100 has a single outlet with a diameter of 500μm, and the entire unit is integrally formed using selective laser melting technology.

[0042] Example 2 The main difference between this embodiment and embodiment 1 is that the positions of the first spoiler 110 and the second spoiler 120 are different: specifically, A / L=1 / 4, B / L=2 / 5, C / L=3 / 5, D / L=3 / 4, E / W=1 / 3.

[0043] Example 3 The main difference between this embodiment and embodiment 1 is that the positions of the first spoiler 110 and the second spoiler 120 are different: specifically, A / L=1 / 3, B / L=3 / 5, C / L=2 / 5, D / L=2 / 3, E / W=1 / 2.

[0044] Comparative Example 1 The main difference between this comparative example and Example 1 is that the positions of the first spoiler 110 and the second spoiler 120 are different: specifically, A / L=1 / 5, B / L=3 / 5, C / L=2 / 5, D / L=4 / 5, E / W=1 / 4.

[0045] Comparative Example 2 The main difference between this comparative example and Example 1 is that the positions of the first spoiler 110 and the second spoiler 120 are different: specifically, A / L=1 / 3, B / L=4 / 5, C / L=1 / 3, D / L=4 / 5, E / W=1 / 4.

[0046] Comparative Example 3 The main difference between this comparative example and Example 1 is that the positions of the first spoiler 110 and the second spoiler 120 are different: specifically, A / L=2 / 5, B / L=1 / 2, C / L=1 / 2, D / L=3 / 5, E / W=2 / 3.

[0047] Comparative Example 4 The main difference between this comparative example and Example 1 is that the reactor 100 is a cube with a side length of 8 mm.

[0048] Comparative Example 5 The main difference between this comparative example and Example 1 is that the material is 316 stainless steel.

[0049] Experimental Example 1 The high-temperature nitration reaction of o-nitrotoluene was carried out using the tantalum micro-reaction channel in the above embodiments and comparative examples. The reaction temperature was 220℃. o-nitrotoluene with a concentration of 98% and a flow rate of 1 mL / min and nitric acid with a concentration of 68% and a flow rate of 2 mL / min were respectively passed through the two channels of the Y-shaped feeder 300. After continuous operation for 500 hours, the reactor 100 was checked for corrosion and deformation, the conversion rate of o-nitrotoluene and the selectivity of the target product 2,4-dinitrotoluene. The test results are shown in Table 1.

[0050] Table 1

[0051] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0052] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A tantalum microreaction channel, characterized in that, The system includes an inlet, a reaction unit, and an outlet. The reaction unit comprises two or more reactors connected in series and / or in parallel via connecting channels. The reactors are spherical or ellipsoidal in shape. The inlet and outlet of each reactor are coaxially arranged with respect to the reactor, and the distance between the inlet and outlet is L, with the direction from the inlet to the outlet of the reactor as the first direction. Each reactor is provided with a first baffle and a second baffle, which are arranged opposite to each other on both sides of the reactor axis. The distance between the end of the first baffle connected to the inner wall of the corresponding reactor and the inlet in the first direction is A, and L and A satisfy: A / L=1 / 3-1 / 4; The distance between the end of the first baffle away from the inner wall of the corresponding reactor and the inlet in the first direction is B, and L and B satisfy: B / L=2 / 5-3 / 5; The distance between the end of the second baffle connected to the inner wall of the corresponding reactor and the inlet in the first direction is C, and L and C satisfy: C / L=2 / 5-3 / 5; The distance between the end of the second baffle away from the inner wall of the corresponding reactor and the inlet in the first direction is D, and L and D satisfy: D / L=2 / 3-3 / 4.

2. The tantalum microreaction channel according to claim 1, characterized in that, The reactor has a width of W perpendicular to the first direction, and the first baffle is coaxially arranged with one axis of symmetry of the reactor and has a width of E. The W and E satisfy: E / W = 1 / 3 - 1 / 2.

3. The tantalum microreaction channel according to claim 1, characterized in that, The reactor has a width of W perpendicular to the first direction, and the second baffle is coaxially arranged with one axis of symmetry of the reactor and has a width of E, and W and E satisfy: E / W=1 / 3-1 / 2.

4. The tantalum microreaction channel according to claim 1, characterized in that, The angle between the end of the first baffle connected to the inner wall of the corresponding reactor and the tangent of the inner wall of the reactor at that location is 30°-60°. And / or, the angle between the end of the first baffle away from the inner wall of the corresponding reactor and the axis of the corresponding reactor is 30°-60°.

5. The tantalum microreaction channel according to claim 1, characterized in that, The angle between the end of the second baffle connected to the inner wall of the corresponding reactor and the tangent of the inner wall of the reactor at that location is 30°-60°. And / or, the angle between the end of the second baffle away from the inner wall of the corresponding reactor and the axis of the corresponding reactor is 30°-60°.

6. The tantalum microreaction channel according to claim 1, characterized in that, The feed inlet is connected in sequence to a connecting channel and a Y-shaped feeder.

7. The tantalum microreaction channel according to claim 1, characterized in that, At least two reactors are connected by a flow channel deflection unit, which includes interconnected connecting channels and bends, the radius of curvature of which is equal to the length of the connecting channels.

8. The tantalum microreaction channel according to claim 1, characterized in that, The reaction unit includes two or more sub-units, each of which includes two or more reactors connected in series and / or in parallel via connecting channels, and the two or more sub-units are connected in series and / or in parallel.

9. The tantalum microreaction channel according to claim 1, characterized in that, The tantalum microreaction channel is a one-piece molded structure.

10. The tantalum microreaction channel according to claim 1, characterized in that, The tantalum microreaction channel is made from tantalum powder using selective laser melting or electron beam selective melting technology.

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