Process for producing hydrogen peroxide by high-efficiency anthraquinone method

Abstract

The invention relates to a process for producing hydrogen peroxide by an efficient anthraquinone method, and relates to the technical field of hydrogen peroxide production, the process for producing hydrogen peroxide by the efficient anthraquinone method comprises the following steps: S1, introducing an anthraquinone working solution and hydrogen into a reaction tank filled with a catalyst to obtain a hydrotreated working solution; s2, introducing the hydrotreated working solution into an oxidation tower, and introducing oxygen into the oxidation tower to obtain a working solution product; s3, the working liquid product is introduced into a vaporizer, a gas product is collected, and a liquid product is introduced into a filter for filtering treatment; and S4, introducing the liquid product filtered by the filter into the vaporizer again. Through cooperation of all the components, the production process of hydrogen peroxide can be completed, high-purity hydrogen peroxide can be obtained by collecting a gas product treated by the vaporizer, under cooperation of the filter, raw materials are efficiently utilized, and the utilization rate of hydrogen peroxide is high.

Description

Technical Field

[0001] The present application relates to the field of hydrogen peroxide production technology, and in particular to a process for producing hydrogen peroxide using an efficient anthraquinone method. Background Art

[0002] Hydrogen peroxide is an important inorganic chemical product. It is often used as an oxidant, bleaching agent, disinfectant, deoxidizer, polymer, initiator and cross-linking agent in chemical, textile, papermaking, military, electronics, medicine, environmental protection and other industries.

[0003] The main industrial production method of hydrogen peroxide is the anthraquinone method. The anthraquinone method mostly uses a fixed bed reactor filled with a catalyst. After the anthraquinone working solution and hydrogen are introduced into the reactor, a hydrogenation reaction occurs on a palladium catalyst bed. The working solution after the hydrogenation reaction is sent to an oxidation tower. The oxygen in the oxidation tower oxidizes the working solution after the hydrogenation reaction to obtain a hydrogen peroxide product.

[0004] In actual operation, the activity of the catalyst in the reaction tank will decrease with the extension of the use time. In order to increase the reaction rate and improve the hydrogen efficiency, the reaction temperature needs to be gradually increased. Since the temperature has a great influence on the hydrogenation side reactions during the hydrogenation reaction, especially in the late stage of the catalyst operation, when the reaction temperature reaches about 75°C, there are more side reactions, which will be accompanied by the generation of a large number of degradation products. The presence of these degradation products will result in a lower purity of the hydrogen peroxide product finally produced, and the hydrogen peroxide product will carry a certain amount of impurities and is difficult to be directly used. Summary of the invention

[0005] In order to improve the situation in the prior art that the hydrogen peroxide product produced by the anthraquinone method has low purity and carries a certain amount of impurities, making it difficult to directly utilize the hydrogen peroxide product, the present application provides a process for producing hydrogen peroxide by an anthraquinone method with high efficiency.

[0006] The present application provides a highly efficient anthraquinone method for producing hydrogen peroxide using the following technical solution: A highly efficient anthraquinone process for producing hydrogen peroxide comprises the following steps: S1: introducing anthraquinone working solution and hydrogen into a reaction tank filled with a catalyst to obtain a hydrogenated working solution; S2: passing the hydrogenated working liquid into an oxidation tower, and introducing oxygen into the oxidation tower to obtain a working liquid product; S3: passing the working liquid product into a vaporizer, collecting the gas product, and passing the liquid product into a filter for filtering; S4: The liquid product after filtering by the filter is introduced into the vaporizer again.

[0007] By adopting the above technical scheme, anthraquinone working liquid and hydrogen are hydrogenated in a reaction tank filled with a catalyst to obtain a hydrogenated working liquid; thereafter, the hydrogenated working liquid is passed into an oxidation tower, and oxygen is passed into the oxidation tower to obtain an oxidized working liquid product; the oxidized working liquid product carries a large amount of hydrogen peroxide product and some impurities, so the working liquid product is passed into a vaporizer, and under the action of the vaporizer, the working liquid product is vaporized in the vaporizer, and the gas product carries high-purity hydrogen peroxide, thereby collecting the gas product, while the impurities and part of the hydrogen peroxide are enriched in the liquid product, thereby the liquid product is passed into a filter for filtering; subsequently, the liquid product after filtering by the filter is passed into the vaporizer again for further processing, and the impurities are retained in the filter for subsequent centralized processing.

[0008] The cooperation of various components in the above process can complete the production process of hydrogen peroxide. The gas product treated by the vaporizer can be collected to obtain high-purity hydrogen peroxide, and impurities can be removed. With the cooperation of the filter, the working fluid after hydrogenation and oxidation treatment can also be efficiently utilized, so that the raw materials are efficiently utilized and the utilization rate of hydrogen peroxide is high.

[0009] Optionally, in step S3, a condenser is used to collect the gaseous product, and the condenser is connected to the top of the vaporizer through a pipeline. After the working liquid product is passed into the vaporizer for a period of time, the gaseous product is pumped into the condenser.

[0010] By adopting the above technical solution, after the working liquid product is passed into the vaporizer, the vaporizer is operated to perform gasification treatment, and the gas product will be enriched at the top of the vaporizer. Thereafter, the gas product is pumped into the condenser through a pipeline, and the gas product is condensed in the condenser to form a liquid, which is convenient for subsequent utilization; and after the working liquid product is passed for a period of time, the gas product is pumped into the condenser, which can also leave enough processing time for the vaporizer, so that the working liquid product can be fully processed in the vaporizer.

[0011] Optionally, the filter includes a tank body, in which a plurality of filter layers are arranged, and each filter layer is filled with a filter medium; in step S3, the liquid product is passed into the top of the tank body, and the liquid product flows through the plurality of filter layers in sequence for filtering treatment; in step S4, the liquid product at the bottom of the tank body is passed into the vaporizer again.

[0012] By adopting the above technical scheme, when the liquid product is filtered through the filter, the liquid product is passed into the top of the tank body, and under the action of gravity, the liquid product will fall and flow through the multiple filter layers in sequence, and the filter medium in the filter layer will adsorb and remove the impurities in the liquid product. The liquid product after the impurities are removed will fall to the bottom of the tank body, and then this part of the liquid product can be passed into the vaporizer again for further processing; through the cooperation of the multiple filter layers, the working liquid product can be filtered layer by layer, the impurities can be effectively adsorbed and removed, and the filtering effect is better.

[0013] Optionally, a spray network is provided on the top of the tank body, and a plurality of spray heads are provided on the spray network; in step S3, the liquid product is introduced into the spray network, and the plurality of spray heads are operated to spray the liquid product onto the filter layer.

[0014] By adopting the above technical scheme, when the liquid product is filtered through the filter, the liquid product is passed into the spray pipe network, and multiple spray heads are then operated to spray the liquid product in the spray pipe network. The liquid product is divided into multiple streams by the cooperation of multiple spray heads and sprayed onto the filter layer, thereby expanding the contact area between the liquid product and the filter layer, avoiding that all the liquid products fall on the filter layer in a single stream, which on the one hand causes a greater impact on the filter layer and affects the stability of the filter layer in the tank body, and on the other hand makes the contact area between the liquid product and the filter layer smaller, so that the filter medium cannot be fully utilized.

[0015] Optionally, the spray head is arranged to be inclined in a direction toward the inner wall of the tank body.

[0016] By adopting the above technical solution, after the spray head operates to spray the liquid product, the liquid product will first contact the inner wall of the tank body and splash up. Under the action of the reaction force, the liquid product spreads out, and the contact area between the liquid product and the filter layer can be further expanded, so that the liquid product can be more fully filtered.

[0017] Optionally, each of the filter layers includes an upper filter plate and a lower filter plate, and a filling space for filling the filter medium is formed between the upper filter plate and the lower filter plate; a plurality of feed pipes and a plurality of discharge pipes are connected to the tank body, and each of the filling spaces corresponds to and is connected to a feed pipe and a discharge pipe.

[0018] By adopting the above technical solution, impurities will adhere to the filter medium after being used for a period of time, resulting in reduced filtration efficiency. At this time, the filter medium in the filling space can be discharged through the discharge pipe, and then new filter medium is filled into it through the feed pipe. The replacement of the filter medium is thus completed, and the operation is simple and convenient.

[0019] Optionally, the lower filter plate is arranged at an angle, and the position of the feed pipe corresponding to each filling space on the side wall of the tank body is higher than the position of the corresponding discharge pipe.

[0020] By adopting the above technical solution, the lower filter plate is tiltedly arranged in the tank body. Since the position of the feed pipe on the side wall of the tank body is higher than the discharge pipe, when the filter medium is filled through the feed pipe, the filter medium is automatically accumulated downward under the action of gravity, and the filter medium in the filling space will be filled more tightly, reducing the time for manual compaction and improving the filling efficiency; when the filter medium is discharged through the discharge pipe, the filter medium is automatically discharged downward under the action of gravity, reducing the time for manual discharge, saving time and labor in operation, and improving the efficiency of filter medium replacement.

[0021] Optionally, in step S3, before the liquid product is introduced into the tank body, deionized water is first introduced into each feed pipe, the deionized water enters the filling space to flush the filter medium, and then the flushed deionized water is pumped out, and then the liquid product is introduced into the tank body.

[0022] By adopting the above technical solution, after the filter is operated once, the filter medium in the tank body is replaced, and the filter is operated again. Before a new liquid product is passed into the tank body for filtering, the filter medium in each filter layer is first rinsed with deionized water, thereby removing impurities existing in the filter medium itself, avoiding the impurities in the filter medium itself from reacting with hydrogen peroxide and catalyzing the decomposition of hydrogen peroxide, thereby causing the temperature in the tank body to rise, resulting in the occurrence of an explosion accident.

[0023] Optionally, the bottom of the tank body is connected to a backwash water inlet pipe, and the top of the tank body is connected to a backwash water outlet pipe; in step S3, before the deionized water passes through each feed pipe, the backwash water is first introduced into the backwash water inlet pipe, and the backwash water flows through each filter layer from bottom to top in turn, and then flows out through the backwash water outlet pipe.

[0024] By adopting the above technical solution, before flushing the filter medium with deionized water, the backwash water is first introduced into the tank body through the backwash water inlet pipe, and the backwash water flows through each filter layer from bottom to top in turn to flush the filter layer and the inner wall of the tank body, and then finally flows out from the backwash water outlet, so that the upper filter plate can be cleaned. With the cooperation of deionized water, each filter layer can be cleaned more adequately.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The cooperation of the various components in the present application can complete the production process of hydrogen peroxide. The gas product after the vaporizer treatment can be collected to obtain high-purity hydrogen peroxide, and impurities can be removed. With the cooperation of the filter, the working fluid after hydrogenation and oxidation treatment can also be efficiently utilized, so that the raw materials are efficiently utilized and the utilization rate of hydrogen peroxide is high; 2. When filtering the liquid product through the filter, the liquid product is passed into the top of the tank body. Under the action of gravity, the liquid product will fall and flow through multiple filter layers in sequence. The filter medium in the filter layer will adsorb and remove the impurities in the liquid product. The liquid product after the impurities are removed will fall to the bottom of the tank body. Then this part of the liquid product can be passed into the vaporizer again for further processing; through the cooperation of multiple filter layers, the working liquid product can be filtered layer by layer, the impurities can be effectively adsorbed and removed, and the filtering effect is better; 3. After the filter has been operated once, the filter medium in the tank is replaced, and the filter is operated again. Before the new liquid product is passed into the tank for filtering, the filter medium in each filter layer is first rinsed with deionized water to remove impurities in the filter medium itself, thereby preventing the impurities in the filter medium from reacting with hydrogen peroxide and catalyzing the decomposition of hydrogen peroxide, which in turn causes the temperature in the tank to rise, leading to the occurrence of an explosion accident. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional view of a filter in a process for producing hydrogen peroxide by a high-efficiency anthraquinone method in an embodiment of the present application.

[0027] Explanation of the accompanying drawings: 1. tank body; 2. filter layer; 21. upper filter plate; 22. lower filter plate; 3. spray pipe network; 4. spray head; 5. filling space; 6. feed pipe; 7. discharge pipe; 8. backwash water inlet pipe; 9. backwash water outlet pipe. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1 This application is described in further detail.

[0029] The present application example discloses a highly efficient anthraquinone method for producing hydrogen peroxide. Figure 1 The high-efficiency anthraquinone method for producing hydrogen peroxide includes the following steps: S1: introducing anthraquinone working solution and hydrogen into a reaction tank filled with a catalyst to obtain a hydrogenated working solution; S2: passing the hydrogenated working liquid into an oxidation tower, and introducing oxygen into the oxidation tower to obtain a working liquid product; S3: passing the working liquid product into the vaporizer, using a condenser to collect the gas product, the condenser is connected to the top of the vaporizer through a pipeline, and after the working liquid product is passed into the vaporizer for a period of time, the gas product is pumped into the condenser; The liquid product is filtered through a filter, the filter comprising a tank body 1, a spray pipe network 3 is arranged on the top of the tank body 1, a plurality of spray heads 4 are arranged on the spray pipe network 3, a plurality of filter layers 2 are arranged from top to bottom in the tank body 1, each filter layer 2 comprises an upper filter plate 21 and a lower filter plate 22, a filling space 5 filled with a filter medium is formed between the upper filter plate 21 and the lower filter plate 22, a plurality of feed pipes 6 and a plurality of discharge pipes 7 are connected to the tank body 1, each filling space 5 corresponds to and is connected to a feed pipe 6 and a discharge pipe 7, a backwash water inlet pipe 8 is connected to the bottom of the tank body 1, and a backwash water outlet pipe 9 is connected to the top of the tank body 1; Backwash water is introduced into the backwash water inlet pipe 8, and the backwash water flows through each filter layer 2 from bottom to top in sequence to wash the filter layer 2 and the inner wall of the tank body 1, and then flows out through the backwash water outlet pipe 9; Deionized water is passed into each feed pipe 6, and the deionized water enters the filling space 5 to rinse the filter medium, remove impurities existing in the filter medium, and the rinsed deionized water is pumped out through the corresponding discharge pipe 7; The liquid product is introduced into the spray pipe network 3, and the multiple spray heads 4 operate to spray the liquid product onto the filter layer 2, and the liquid product flows through the multiple filter layers 2 in sequence to be filtered; S4: The liquid product at the bottom of the tank 1 is introduced into the vaporizer again.

[0030] In the embodiment of the present application, the multiple spray heads 4 on the spray pipe network 3 are all arranged obliquely in the direction toward the inner wall of the tank body 1. After the spray head 4 operates to spray the liquid product, the liquid product will first contact the inner wall of the tank body 1 and splash up. Under the action of the reaction force, the liquid product diffuses, and the contact area between the liquid product and the filter layer 2 can be further expanded, so that the liquid product can be more fully filtered.

[0031] In the embodiment of the present application, the lower filter plate 22 of each filter layer 2 is tiltedly arranged in the tank body 1, and the position of the feed pipe 6 corresponding to each filling space 5 on the side wall of the tank body 1 is higher than the position of the corresponding discharge pipe 7. When the filter medium is filled through the feed pipe 6, the filter medium is automatically accumulated downward under the action of gravity, and the filter medium in the filling space 5 will be filled more tightly, reducing the time for manual compaction and improving the filling efficiency; when the filter medium is discharged through the discharge pipe 7, the filter medium is automatically discharged downward under the action of gravity.

[0032] The implementation principle of a high-efficiency anthraquinone method for producing hydrogen peroxide in an embodiment of the present application is as follows: anthraquinone working liquid and hydrogen are hydrogenated in a reaction tank filled with a catalyst to obtain a hydrogenated working liquid; thereafter, the hydrogenated working liquid is passed into an oxidation tower, and oxygen is passed into the oxidation tower to obtain an oxidized working liquid product; the oxidized working liquid product carries a large amount of hydrogen peroxide product and some impurities, so the working liquid product is passed into a vaporizer, and under the action of the vaporizer, the working liquid product is vaporized in the vaporizer, and the gas product carries high-purity hydrogen peroxide, thereby collecting the gas product, while the impurities and part of the hydrogen peroxide are enriched in the liquid product, thereby passing the liquid product into a filter for filtering; subsequently, the liquid product after filtering by the filter is passed into the vaporizer again for further processing, and the impurities are retained in the filter for subsequent centralized processing.

[0033] The cooperation of various components in the above process can complete the production process of hydrogen peroxide. The gas product treated by the vaporizer can be collected to obtain high-purity hydrogen peroxide, and impurities can be removed. With the cooperation of the filter, the working fluid after hydrogenation and oxidation treatment can also be efficiently utilized, so that the raw materials are efficiently utilized and the utilization rate of hydrogen peroxide is high.

[0034] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A process for producing hydrogen peroxide by an efficient anthraquinone method, characterized in that: The following steps are involved: S1: introducing anthraquinone working solution and hydrogen into a reaction tank filled with a catalyst to obtain a hydrogenated working solution; S2: passing the hydrogenated working liquid into an oxidation tower, and introducing oxygen into the oxidation tower to obtain a working liquid product; S3: passing the working liquid product into a vaporizer, collecting the gas product, and passing the liquid product into a filter for filtering; S4: The liquid product after filtering by the filter is introduced into the vaporizer again.

2. A process for producing hydrogen peroxide by an efficient anthraquinone method according to claim 1, characterized in that: In step S3, a condenser is used to collect the gaseous product, and the condenser is connected to the top of the vaporizer through a pipeline. After the working liquid product is passed into the vaporizer for a period of time, the gaseous product is pumped into the condenser.

3. The process for producing hydrogen peroxide by an efficient anthraquinone method according to claim 1, characterized in that: The filter comprises a tank body (1), wherein a plurality of filter layers (2) are arranged in the tank body (1), and each of the filter layers (2) is filled with a filter medium; in step S3, a liquid product is passed into the top of the tank body (1), and the liquid product flows through the plurality of filter layers (2) in sequence to be filtered; in step S4, the liquid product at the bottom of the tank body (1) is passed into the vaporizer again.

4. A process for producing hydrogen peroxide by an efficient anthraquinone method according to claim 3, characterized in that: A spray pipe network (3) is arranged at the top of the tank body (1), and a plurality of spray heads (4) are arranged on the spray pipe network (3); in step S3, a liquid product is introduced into the spray pipe network (3), and the plurality of spray heads (4) are operated to spray the liquid product onto the filter layer (2).

5. A process for producing hydrogen peroxide by an efficient anthraquinone method according to claim 4, characterized in that: The spray head (4) is arranged obliquely in a direction toward the inner wall of the tank body (1).

6. The process for producing hydrogen peroxide by an efficient anthraquinone method according to claim 3, characterized in that: Each of the filter layers (2) comprises an upper filter plate (21) and a lower filter plate (22), and a filling space (5) for filling a filter medium is formed between the upper filter plate (21) and the lower filter plate (22); a plurality of feed pipes (6) and a plurality of discharge pipes (7) are connected to the tank body (1), and each of the filling spaces (5) corresponds to and is connected to a feed pipe (6) and a discharge pipe (7).

7. A process for producing hydrogen peroxide by an efficient anthraquinone method according to claim 6, characterized in that: The lower filter plate (22) is arranged at an angle, and the position of the feed pipe (6) corresponding to each of the filling spaces (5) on the side wall of the tank body (1) is higher than the position of the corresponding discharge pipe (7).

8. The process for producing hydrogen peroxide by an efficient anthraquinone method according to claim 6, characterized in that: In step S3, before the liquid product is introduced into the tank body (1), deionized water is first introduced into each feed pipe (6), and the deionized water enters the filling space (5) to flush the filter medium. The flushed deionized water is then pumped out, and the liquid product is then introduced into the tank body (1).

9. The process for producing hydrogen peroxide by an efficient anthraquinone method according to claim 8, characterized in that: The bottom of the tank body (1) is connected to a backwash water inlet pipe (8), and the top of the tank body (1) is connected to a backwash water outlet pipe (9); in step S3, before the deionized water passes through each feed pipe (6), backwash water is first introduced into the backwash water inlet pipe (8), and the backwash water flows through each filter layer (2) from bottom to top in sequence, and then flows out through the backwash water outlet pipe (9).

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