Production device of copper acetate for catalyst

Abstract

The production device comprises a reaction tower, a first feeding pipe and a second feeding pipe, the reaction tower is internally provided with an exhaust port located in the top and a liquid discharging port located in the bottom, and a copper material layer, a micropore aeration layer and a heating layer are sequentially arranged in the reaction tower from top to bottom; the first feeding pipe and the second feeding pipe are both located on the side wall of the reaction tower and both located at the upper end of the copper material layer, hydrogen peroxide is decomposed and released in an acid solution, hydroxyl free radicals with high oxidizing capacity are obtained, primary oxidation of copper is rapidly achieved, dissolved oxygen in the solution and oxygen in aeration bubbles are increased to make contact with copper through the micropore aeration layer, and the copper oxidation rate is increased. And the heating layer can promote the reaction efficiency, the reaction is obvious at the temperature of 50-60 DEG C, the temperature does not need to reach 80-90 DEG C, and the energy consumption is obviously reduced.

Description

Technical Field

[0001] The present application relates to the field of copper acetate production, and in particular to a copper acetate production device for catalyst. Background Art

[0002] Copper acetate, also known as copper acetate, is a widely used chemical reagent and organic synthesis catalyst. Previously, the main production process was to synthesize basic copper carbonate from copper sulfate and sodium carbonate, and then react with acetic acid to form copper acetate. The copper acetate produced by this process is prone to contain impurity particles such as sodium sulfate and copper carbonate, and the product does not meet the purity requirements of copper acetate for catalysts.

[0003] In the related art, the air or oxygen oxidation method is used to produce copper acetate, and copper wire (or copper sheet) is oxidized in acetic acid solution to directly react to generate copper acetate. The copper acetate produced by this process has high purity and good quality, but the oxidation efficiency is low, resulting in a long production cycle. At the same time, oxygen oxidation has a low utilization rate and a high cost. In order to improve the reaction efficiency, the reaction temperature is 80-90°C, the energy consumption is high, and the acetic acid volatilization is serious. Utility Model Content

[0004] The embodiment of the present application provides a copper acetate production device for catalyst to solve the technical problems in the related art that the oxidation efficiency is low, resulting in a long production cycle. At the same time, the cost of oxygen oxidation is high due to the low utilization rate. In order to improve the reaction efficiency, the reaction temperature is 80-90°C, the energy consumption is high, and the acetic acid volatilization is serious.

[0005] Provided is a copper acetate production device for catalyst, comprising:

[0006] A reaction tower, wherein the reaction tower has an exhaust port at the top and a liquid discharge port at the bottom, and wherein a copper material layer, a microporous aeration layer and a heating layer are sequentially arranged in the reaction tower from top to bottom;

[0007] A first feed pipe and a second feed pipe, wherein the first feed pipe and the second feed pipe are both located on the side wall of the reaction tower and are both located on the upper end of the copper material layer;

[0008] Wherein, the first feed pipe is used for conveying copper acetate or acetic acid solution, and the second feed pipe is used for conveying hydrogen peroxide.

[0009] In some embodiments, the copper material layer includes at least two layers and is distributed from top to bottom along the reaction tower.

[0010] In some embodiments, the copper material layer includes a support plate and copper material on the support plate. The support plate is arranged on the inner wall of the reaction tower along a horizontal direction, and a plurality of through holes are formed on the support plate.

[0011] In some embodiments, the copper material is copper wire or copper sheet.

[0012] In some embodiments, the heating layer includes a steam coil and a steam inlet pipe and a steam outlet pipe located on the side wall of the reaction tower, and the steam inlet pipe and the steam outlet pipe are respectively connected to the air inlet end and the air outlet end of the steam coil.

[0013] In some embodiments, a demister is further provided on the top of the reaction tower.

[0014] In some embodiments, the reaction tower is further provided with a condensate return port;

[0015] It also includes a condenser, wherein the steam inlet and the condensate return port of the condenser are respectively connected to the exhaust port and the condensate return port.

[0016] The beneficial effects of the technical solution provided by this application include:

[0017] The embodiment of the present application provides a copper acetate production device for catalyst. Hydrogen peroxide decomposes in an acidic solution to release hydroxyl radicals with strong oxidizing ability, which quickly achieves the initial oxidation of copper. The dissolved oxygen in the solution and the oxygen in the aeration bubbles contact with copper through the microporous aeration layer, thereby improving the oxidation efficiency. The heating layer can promote the reaction efficiency. The reaction is obvious at 50-60°C, and there is no need to heat the temperature to 80-90°C, thereby significantly reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram of the structure of a reaction tower provided in an embodiment of the present application;

[0020] Figure 2 A flowchart of an embodiment of the present application is provided.

[0021] In the figure: 1. reaction tower; 2. exhaust port; 3. drain port; 4. copper material layer; 41. support plate; 5. microporous aeration layer; 6. heating layer; 61. steam coil; 62. steam inlet pipe; 63. steam outlet pipe; 7. first feed pipe; 8. second feed pipe; 9. demister; 10. condenser. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0023] The embodiment of the present application provides a copper acetate production device for catalyst, which can solve the technical problems in the related art that the oxidation efficiency is low, resulting in a long production cycle. At the same time, the cost of oxygen oxidation is high due to the low utilization rate. In order to improve the reaction efficiency, the reaction temperature is 80-90°C, the energy consumption is high, and the acetic acid volatilization is serious.

[0024] Provided is a copper acetate production device for catalyst, comprising a reaction tower 1, a first feed pipe 7 and a second feed pipe 8, wherein the reaction tower 1 is provided with an exhaust port 2 at the top and a liquid discharge port 3 at the bottom, and the reaction tower 1 is provided with a copper material layer 4, a microporous aeration layer 5 and a heating layer 6 in sequence from top to bottom; the first feed pipe 7 and the second feed pipe 8 are both located on the side wall of the reaction tower 1 and at the upper end of the copper material layer 4; wherein the first feed pipe 7 is used for conveying copper acetate or acetic acid solution, and the second feed pipe 8 is used for conveying hydrogen peroxide.

[0025] Combination Figure 1 as well as Figure 2 The first feed pipe 7 and the second feed pipe 8 are at the same height. The first feed pipe 7 is connected to a tee. The three pipes of the tee are marked as A, B and C. The C pipe is connected to the first feed pipe. The A pipe is connected to the acetic acid solution and the B pipe is connected to the copper acetate solution. When the reaction starts, the valve on the B pipe is closed, and the acetic acid solution is input through the A and C pipes, while the second feed pipe 8 is always input with hydrogen peroxide. The hydrogen peroxide decomposes in the acidic solution and releases hydroxyl radicals with strong oxidizing ability, which quickly realizes the initial oxidation of copper. At this stage, the heating layer 6 generates steam by heating and moves upward, which can increase the oxidation efficiency.

[0026] The microporous aeration layer 5 adopts full coverage compressed air microporous aeration, which is achieved by distributing air pipes in the tower and then introducing compressed air from the outside. This is a prior art, so no further explanation is given here. Through microporous aeration, the dissolved oxygen in the solution and the contact between oxygen and copper in the aeration bubbles are increased, thereby improving the oxidation efficiency.

[0027] The liquid discharge port 3 is connected to an external cooling kettle through a pipeline, and a liquid discharge pump is arranged on the pipeline.

[0028] Sampling and testing of Cu in the reaction tower solution 2+When the content is higher than 3.5% (equivalent to 10% of copper acetate), the drainage pump is turned on to quantitatively discharge the reaction liquid. The reaction liquid is cooled in the cooling kettle to crystallize copper acetate. After filtration, the mother liquor is returned to the reaction tower 1 through the B pipeline as a replenishing liquid (and the amount of acetic acid solution required is calculated based on the amount of copper acetate after filtration). At this time, the valve on the acetic acid A pipeline is closed, and the copper acetate mother liquor is input through the B and C pipelines. When the Cu content in the reaction tower solution is 2+ When the content is close to 5.25% (equivalent to 15% of copper acetate), the drainage pump will speed up the discharge of the reaction liquid to avoid the high content of copper acetate in the reaction tower 1 and the precipitation of crystals.

[0029] Furthermore, the copper material layer 4 includes at least two layers and is distributed from top to bottom along the reaction tower 1 .

[0030] In the embodiment of the present application, the copper material layer 4 is provided with two layers, so that the acetic acid solution and copper can fully react, and the copper material layer 4 includes a support plate 41 and a copper material located on the support plate 41, and the support plate 41 is arranged on the inner wall of the reaction tower 1 in a horizontal direction, and a plurality of through holes are opened on the support plate 41.

[0031] That is, the acetic acid solution and oxygen or hydrogen peroxide first react with the copper material on the upper support plate 41, and the excess acetic acid or unreacted acetic acid will fall onto the next support plate 41 under the action of the through hole to continue the reaction, and the copper acetate solution obtained by the reaction will finally fall to the bottom of the tower and be discharged into the cooling kettle through the drain port 3, and copper acetate will be cooled and crystallized.

[0032] Furthermore, the copper material is made of copper wire or copper sheet, which can expand the contact area between oxygen and acetic acid solution and copper, maximize the contact area of ​​the oxidation reaction, and improve the oxidation efficiency.

[0033] In a specific implementation scheme, the present application adopts steam heating, the raw materials are easy to obtain, and the layout is relatively convenient and the cost is relatively simple. The heating layer 6 includes a steam coil 61 and a steam inlet pipe 62 and a steam outlet pipe 63 located on the side wall of the reaction tower 1. The steam inlet pipe 62 and the steam outlet pipe 63 are respectively connected to the air inlet end and the air outlet end of the steam coil 61.

[0034] As the reaction proceeds, the amount of copper acetate dissolved in the copper acetate solution increases, and the copper acetate solution can also tumble under the effect of heating, thereby ensuring the uniformity of the discharged liquid.

[0035] Furthermore, a demister 9 is also provided on the top of the reaction tower 1. During the steam heating process, a small amount of water vapor and entrained acetic acid pass through the demister 9 and agglomerate under the action of the bent blades of the demister 9. After agglomeration, most of them fall back into the reaction tower 1, reducing resource waste. The demister 9 is a product currently on sale in the market, so its specific structure is not described in detail in this application.

[0036] After a small amount of water vapor and entrained acetic acid pass through the demister 9, they cannot be completely agglomerated by the demister 9, so a condensate return port is also provided on the reaction tower 1;

[0037] It also includes a condenser 10, and a steam inlet and a condensate return port of the condenser 10 are connected to the exhaust port 2 and the condensate return port respectively.

[0038] See also Figure 2 The remaining entrained liquid is cooled by heat exchange in the tower top condenser 10, and then refluxed to the reaction tower 1 through the condensate return port, and the tail exhaust air is discharged through the exhaust pipe, thereby further reducing resource waste.

[0039] At present, the process of producing copper acetate by oxidation with air or oxygen is usually to stop the reaction before the solution begins to precipitate copper acetate crystals, and discharge the solution in the reactor to cool and crystallize. This is an intermittent process, and auxiliary operations such as feeding and discharging, heating and cooling are time-consuming. 2+ Content changes, continuous operation, compact process and higher reaction efficiency.

[0040] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0041] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0042] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A copper acetate production device for catalyst, characterized in that: include: A reaction tower (1), wherein the reaction tower (1) has an exhaust port (2) at the top and a liquid discharge port (3) at the bottom, and wherein a copper material layer (4), a microporous aeration layer (5) and a heating layer (6) are sequentially arranged in the reaction tower (1) from top to bottom; A first feed pipe (7) and a second feed pipe (8), wherein the first feed pipe (7) and the second feed pipe (8) are both located on the side wall of the reaction tower (1) and are both located at the upper end of the copper material layer (4); The first feed pipe (7) is used to transport copper acetate or acetic acid solution, and the second feed pipe (8) is used to transport hydrogen peroxide.

2. The copper acetate production device for catalyst according to claim 1, characterized in that: The copper material layer (4) comprises at least two layers and is distributed from top to bottom along the reaction tower (1).

3. The copper acetate production device for catalyst according to claim 1, characterized in that: The copper material layer (4) comprises a support plate (41) and copper material on the support plate (41); the support plate (41) is arranged on the inner side wall of the reaction tower (1) in a horizontal direction, and a plurality of through holes are formed on the support plate (41).

4. The copper acetate production device for catalyst according to claim 3, characterized in that: The copper material is made of copper wire or copper sheet.

5. The copper acetate production device for catalyst according to claim 1, characterized in that: The heating layer (6) comprises a steam coil (61) and a steam inlet pipe (62) and a steam outlet pipe (63) located on the side wall of the reaction tower (1); the steam inlet pipe (62) and the steam outlet pipe (63) are respectively connected to the air inlet end and the air outlet end of the steam coil (61).

6. The copper acetate production device for catalyst according to claim 1, characterized in that: A demister (9) is also provided on the top of the reaction tower (1).

7. The copper acetate production device for catalyst according to claim 1, characterized in that: The reaction tower (1) is also provided with a condensate return port; It also comprises a condenser (10), wherein the steam inlet and the condensate return port of the condenser (10) are respectively connected to the exhaust port (2) and the condensate return port.

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