Apparatus for the continuous synthesis of ammonium formate based on the carbon monoxide bubbling method

Abstract

This invention provides an apparatus for the continuous synthesis of ammonium formate based on carbon monoxide bubbling, belonging to the field of ammonium formate synthesis technology. The apparatus includes a pressurized reactor and a carbon monoxide circulating bubbling device connected to the pressurized reactor. The carbon monoxide circulating bubbling device includes a circulation pipe, a pressurized circulation pump disposed within the circulation pipe, and a carbon monoxide replenishment pipe connected to the circulation pipe. The carbon monoxide outlet of the circulation pipe is connected to the bottom inlet of the pressurized reactor, and the carbon monoxide inlet of the circulation pipe is connected to the top outlet of the pressurized reactor. This invention, by setting up a carbon monoxide circulating bubbling device, utilizes the gaseous bubbling circulation of carbon monoxide to achieve liquid mixing and diffusion and increase the gas-liquid contact area, replacing conventional mechanical stirring. This facilitates more uniform mixing of reactants and gas-liquid reaction. The apparatus can continuously replenish the carbon monoxide consumed in the reaction for continuous synthesis of ammonium formate.

Description

Technical Field

[0001] This utility model relates to the field of ammonium formate synthesis technology, specifically to an apparatus for the continuous synthesis of ammonium formate based on the carbon monoxide bubbling method. Background Technology

[0002] Ammonium formate is an important compound with the molecular formula NH4HCO2, and it has wide applications in agriculture, food, medicine and chemical industries.

[0003] Existing ammonium formate synthesis equipment typically involves a stirred acid-base reaction of formic acid and ammonia in a reactor under atmospheric pressure, using a stirring device to mechanically agitate the raw materials. However, for the new one-step synthesis of ammonium formate based on carbon monoxide, conventional mechanical agitation often fails to ensure thorough mixing of the reactants, thus affecting the efficient synthesis of ammonium formate. Furthermore, most existing ammonium formate synthesis equipment is batch-based, making continuous production difficult and resulting in low production efficiency. Utility Model Content

[0004] In view of the technical problems existing in the background art, this utility model is based on a new one-step process for synthesizing ammonium formate using carbon monoxide. It designs a device for the continuous synthesis of ammonium formate based on the carbon monoxide bubbling method. This device utilizes the gas circulation, liquid mixing and diffusion of carbon monoxide and the function of increasing the gas-liquid contact area to replace conventional mechanical stirring, which is conducive to promoting more uniform mixing of reaction raw materials and gas-liquid reaction. Moreover, the device can continuously replenish the carbon monoxide consumed in the reaction to achieve continuous synthesis of ammonium formate.

[0005] This utility model provides an apparatus for the continuous synthesis of ammonium formate based on the carbon monoxide bubbling method, including a pressurized reactor and a carbon monoxide circulating bubbling device connected to the pressurized reactor; The carbon monoxide circulating bubbling device includes a circulation pipe, a pressurized circulation pump installed in the circulation pipe, and a carbon monoxide replenishment pipe connected to the circulation pipe; the carbon monoxide outlet of the circulation pipe is connected to the bottom air inlet of the pressurized reactor, and the carbon monoxide inlet of the circulation pipe is connected to the top air outlet of the pressurized reactor.

[0006] In some embodiments, the apparatus for the continuous synthesis of ammonium formate based on the carbon monoxide bubbling method further includes a feed pipe and a discharge pipe connected to the pressurized reactor.

[0007] In some embodiments, one end of the feed pipe is connected to the reaction raw material supply device, and the other end is connected to the bottom of the pressurized reactor.

[0008] In some embodiments, one end of the discharge pipe is connected to the reaction liquid collection device, and the other end is connected to the side wall of the pressurized reactor.

[0009] In some embodiments, a filter is provided at the connection between the discharge pipe and the side wall of the pressurized reactor to prevent solid catalyst from flowing out through the discharge pipe.

[0010] In some embodiments, the connection between the discharge pipe and the side wall of the pressurized reactor is located above the middle of the pressurized reactor, and the liquid level in the pressurized reactor is not lower than the height of the discharge pipe.

[0011] In some embodiments, flow valves are respectively provided in the feed pipe and the discharge pipe.

[0012] In some embodiments, the connection between the carbon monoxide replenishment pipeline and the circulation pipeline is located between the pressurized circulation pump and the carbon monoxide inlet of the circulation pipeline.

[0013] In some embodiments, one end of the carbon monoxide replenishment pipe is connected to a carbon monoxide supply device.

[0014] In some embodiments, a pressure monitoring device is provided inside the pressurized reactor.

[0015] The beneficial effects of this utility model include: 1. The apparatus for continuous synthesis of ammonium formate based on carbon monoxide bubbling method provided by this utility model, by setting up a carbon monoxide circulating bubbling device, enables carbon monoxide to circulate repeatedly through a pressurized circulating pump. This allows carbon monoxide to enter from the bottom air inlet of the pressurized reactor, fully contact and mix with the reaction raw material mixture, and bubble before being discharged into the circulation pipeline through the top air outlet of the pressurized reactor. This achieves the bubbling mixing function and increases the gas-liquid contact surface, effectively replacing conventional mechanical stirring and effectively promoting the efficient mixing of carbon monoxide and the reaction raw material mixture to improve reaction efficiency. On the other hand, the carbon monoxide replenishment pipeline in the carbon monoxide circulating bubbling device can continuously replenish the carbon monoxide consumed in the reaction in the pressurized reactor to ensure continuous reaction.

[0016] 2. The apparatus for continuous synthesis of ammonium formate based on carbon monoxide bubbling method provided by this utility model can achieve continuous feeding and continuous discharging by setting up feed pipes and discharge pipes, further ensuring the continuous synthesis of ammonium formate. On this basis, by setting up a filter on the discharge pipe, this utility model can effectively prevent the solid catalyst from being carried away from the pressurized reactor by the reaction liquid, thereby ensuring that the solid catalyst always remains in the pressurized reactor to maintain the catalytic activity of the reaction system in the pressurized reactor and further promote the efficient synthesis of ammonium formate.

[0017] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

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

[0019] Figure 1 This is a schematic diagram of the apparatus for the continuous synthesis of ammonium formate based on the carbon monoxide bubbling method provided in the embodiments of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Pressurized reactor; 21. Circulation pipeline; 22. Pressurized circulation pump; 23. Carbon monoxide replenishment pipeline; 3. Feed pipeline; 31. First flow valve; 4. Discharge pipeline; 41. Second flow valve; 5. Filter; 6. Carbon monoxide supply device; 7. Reaction raw material supply device; 8. Reaction liquid collection device. Detailed Implementation

[0021] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the invention, are intended to cover non-exclusive inclusion.

[0023] In the description of the embodiments of this utility model, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this utility model, "multiple" means two or more, unless otherwise explicitly defined.

[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0025] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0026] In the description of the embodiments of this utility model, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and 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 the embodiments of this utility model.

[0027] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0028] To address the technical problems of poor mechanical mixing and difficulty in achieving continuous production in traditional ammonium formate synthesis devices, this invention provides a device for the continuous synthesis of ammonium formate based on carbon monoxide bubbling. By setting up a carbon monoxide circulating bubbling device, not only can the bubbling mixing function be achieved by circulating carbon monoxide gas to replace conventional mechanical stirring and promote more uniform mixing of reaction raw materials, but the carbon monoxide can also be continuously replenished through the carbon monoxide replenishment pipe 23 to achieve continuous synthesis of ammonium formate.

[0029] Please refer to Figure 1This utility model provides an apparatus for the continuous synthesis of ammonium formate based on the carbon monoxide bubbling method, including a pressurized reactor 1 and a carbon monoxide circulating bubbling device connected to the pressurized reactor 1; The carbon monoxide circulating bubbling device includes a circulating pipe 21, a pressurized circulating pump 22 installed in the circulating pipe 21, and a carbon monoxide replenishment pipe 23 connected to the circulating pipe 21; the carbon monoxide outlet of the circulating pipe 21 is connected to the bottom air inlet of the pressurized reactor 1, and the carbon monoxide inlet of the circulating pipe 21 is connected to the top air outlet of the pressurized reactor 1.

[0030] This embodiment of the invention incorporates a carbon monoxide circulating bubbling device, enabling carbon monoxide to circulate repeatedly via a pressurized circulating pump 22. This allows the carbon monoxide to enter through the bottom inlet of the pressurized reactor 1, fully contact and mix with the reaction mixture, and then bubble before being discharged through the top outlet of the pressurized reactor 1 into the circulating pipe 21, thus achieving the bubbling mixing function. Conventional ammonium formate synthesis devices involve the neutralization of formic acid and ammonia under mechanical stirring, without a gas phase, resulting in a rapid neutralization reaction. However, in the novel one-step carbon monoxide synthesis process of this invention, the simultaneous presence of gaseous and liquid reaction materials makes it difficult for conventional mechanical stirring to ensure uniform gas-liquid mixing, thereby affecting the synthesis effect of ammonium formate. Compared with the mechanical stirring device in conventional ammonium formate synthesis equipment, the carbon monoxide circulating bubbling device provided in this invention can not only use carbon monoxide to achieve bubbling mixing function and increase the gas-liquid contact surface to replace the conventional mechanical stirring device, but also ensure that the carbon monoxide, as a reaction raw material, is fully contacted and efficiently mixed with the reaction raw material mixture during the process from feeding from the bottom of the pressurized reactor 1 to discharging from the top of the pressurized reactor 1. This effectively improves the gas-liquid mixing efficiency and is conducive to promoting the efficient synthesis of ammonium formate.

[0031] Furthermore, by incorporating a carbon monoxide replenishment pipe 23 into the carbon monoxide circulation bubbling device, this invention continuously replenishes the carbon monoxide consumed in the reaction during the carbon monoxide circulation process, thereby maintaining a constant system pressure within the pressurized reactor 1 and ensuring continuous reaction. Further, in this embodiment, one end of the carbon monoxide replenishment pipe 23 is connected to the carbon monoxide supply device 6, and the other end is connected to the circulation pipe 21, allowing the carbon monoxide supply device 6 to continuously input carbon monoxide into the carbon monoxide replenishment pipe 23, ensuring continuous reaction. A corresponding valve can be installed at the outlet of the carbon monoxide supply device 6 or in the carbon monoxide replenishment pipe 23 to regulate the amount of carbon monoxide replenished, thereby maintaining a constant pressure in the reaction system within the pressurized reactor 1.

[0032] Furthermore, in this embodiment of the invention, the connection between the carbon monoxide replenishment pipe 23 and the circulation pipe 21 is located between the pressurized circulation pump 22 and the carbon monoxide inlet of the circulation pipe 21, so that the carbon monoxide input through the carbon monoxide replenishment pipe 23 can be transported to the pressurized reactor 1 by the pressurized circulation pump 22 to replenish the carbon monoxide lost in the reaction.

[0033] Furthermore, in this embodiment of the invention, the apparatus for the continuous synthesis of ammonium formate based on the carbon monoxide bubbling method also includes a feed pipe 3 and a discharge pipe 4 connected to the pressurized reactor 1. By discharging the reaction liquid obtained after the reaction through the discharge pipe 4 and inputting the reaction raw materials through the feed pipe 3, the continuous progress of the ammonium formate synthesis reaction can be ensured. Specifically, the specific feeding and discharging methods can be adjusted according to the needs of actual production. For example, after the reaction is fully completed, the mixture can be completely discharged through the discharge pipe 4, and then an equal amount of reaction raw material mixture can be input through the feed pipe 3; alternatively, after the reaction is fully completed, the reaction liquid can be slowly and continuously discharged in small amounts through the discharge pipe 4, while the reaction raw material mixture can be continuously input through the feed pipe 3 at the same flow rate.

[0034] Furthermore, in this embodiment of the invention, one end of the feed pipe 3 is connected to the reaction material supply device 7, and the other end is connected to the bottom of the pressurized reactor 1. This arrangement ensures that both the reaction materials and carbon monoxide are input from the bottom of the pressurized reactor 1, which is more conducive to promoting sufficient contact and reaction between the two. The reaction material supply device 7 stores other reaction materials required for ammonium formate synthesis besides carbon monoxide, such as liquid ammonia and water. These reaction materials are added to the reaction material supply device 7 in the required proportions, and the resulting reaction material mixture is then input into the pressurized reactor 1 through the feed pipe 3. There, it reacts with carbon monoxide to generate ammonium formate. Furthermore, in some embodiments of the invention, the reaction material supply device 7 can be equipped with a stirring device as needed to premix the reaction materials; a pumping device can also be installed in the feed pipe 3 to efficiently transport the reaction material mixture in the reaction material supply device 7 to the pressurized reactor 1.

[0035] Furthermore, in this embodiment of the invention, one end of the discharge pipe 4 is connected to the reaction liquid collection device 8, and the other end is connected to the side wall of the pressurized reactor 1. With this configuration, the reaction liquid formed inside the pressurized reactor 1 can be discharged through the discharge pipe 4 into the reaction liquid collection device 8, so as to effectively collect the crude ammonium formate product generated by the reaction. The reaction liquid collection device 8 can also be further connected to an ammonium formate purification device for purifying the collected ammonium formate in the reaction liquid to obtain high-purity ammonium formate.

[0036] Furthermore, in this embodiment of the invention, a filter 5 is provided at the connection between the discharge pipe 4 and the side wall of the pressurized reactor 1 to prevent the solid catalyst from flowing out through the discharge pipe 4. It should be noted that a catalyst needs to be added during the synthesis of ammonium formate. This catalyst can be an insoluble solid catalyst and / or a soluble catalyst. If a soluble catalyst is added, it can be added to the reaction raw material supply device 7 in the required proportion for the reaction, thereby continuously supplying the catalyst through the feed pipe 3 to maintain the catalytic activity of the reaction system. The reaction liquid discharged through the discharge pipe 4 can be purified to separate the ammonium formate from the catalyst. If an insoluble solid catalyst is added, it can be pre-added to the pressurized reactor 1, and the filter 5 provided in this embodiment of the invention prevents the solid catalyst from flowing out. The filter pore diameter of the filter 5 needs to be smaller than the particle size of the solid catalyst to ensure that the solid catalyst always remains in the pressurized reactor 1, thereby maintaining the catalytic activity of the reaction system and further promoting the efficient synthesis of ammonium formate.

[0037] Furthermore, in this embodiment of the invention, the connection between the discharge pipe 4 and the side wall of the pressurized reactor 1 is located above the middle of the pressurized reactor 1, and the liquid level in the pressurized reactor 1 is not lower than the height of the discharge pipe 4. This arrangement ensures that the carbon monoxide fed from the bottom of the pressurized reactor 1 and the reaction mixture react fully before being discharged at a higher liquid level, which is beneficial for increasing the ammonium formate content in the discharged reaction liquid.

[0038] Furthermore, in this embodiment of the invention, flow valves are respectively installed in the feed pipe 3 and the discharge pipe 4. Specifically, a first flow valve 31 is installed in the feed pipe 3, and a second flow valve 41 is installed in the discharge pipe 4. By regulating the flow rates of the first flow valve 31 and the second flow valve 41, the feed rate and the discharge rate are made to be basically equivalent, which is beneficial to maintaining the stability and continuity of the reaction.

[0039] Furthermore, in this embodiment of the invention, a pressure monitoring device is installed inside the pressurized reactor 1 to monitor the pressure inside the pressurized reactor 1. When carbon monoxide is added through the carbon monoxide replenishment pipe 23, maintaining a constant pressure in the reaction system inside the pressurized reactor 1 is more conducive to ensuring the continuous progress of the reaction.

[0040] According to one or more embodiments of the present invention, in the use of the apparatus for continuous synthesis of ammonium formate based on carbon monoxide bubbling, an insoluble solid catalyst can be added to the pressurized reactor in advance. The required reaction raw material mixture can be pre-stored in the reaction raw material supply device 7, and the reaction raw material mixture is input into the pressurized reactor 1 through the feed pipe 3 under the action of the corresponding pumping device. The required carbon monoxide can be pre-stored in the carbon monoxide supply device 6, and the carbon monoxide enters the circulation pipe 21 through the carbon monoxide replenishment pipe 23, and enters the pressurized reactor 1 under the action of the pressurized circulation pump 22. It fully contacts and mixes with the reaction raw material mixture and bubbles, thereby effectively promoting the efficient mixing and gas-liquid contact of each raw material without the need for a mechanical stirring device. After the reaction, the excess carbon monoxide is discharged through the gas outlet at the top of the pressurized reactor 1, enters the circulation pipe 21, mixes with the replenished carbon monoxide, and then enters from the gas inlet at the bottom of the pressurized reactor 1, and so on. As carbon monoxide circulates, the raw materials in the pressurized reactor 1 react fully to obtain a reaction solution containing ammonium formate. The reaction solution is then discharged through the discharge pipe 4. The solid catalyst in the pressurized reactor 1 remains in the pressurized reactor 1 under the obstruction of the filter 5 and is fed into the reactor through the feed pipe 3. During the feeding and discharging process, carbon monoxide continues to circulate in the manner described above, thereby realizing the continuous synthesis of ammonium formate.

[0041] In summary, this invention provides an apparatus for the continuous synthesis of ammonium formate based on carbon monoxide bubbling, belonging to the field of ammonium formate synthesis technology. The apparatus includes a pressurized reactor 1 and a carbon monoxide circulating bubbling device connected to the pressurized reactor 1. The carbon monoxide circulating bubbling device includes a circulation pipe 21, a pressurized circulation pump 22 disposed within the circulation pipe 21, and a carbon monoxide replenishment pipe 23 connected to the circulation pipe 21. The carbon monoxide outlet of the circulation pipe 21 is connected to the bottom inlet of the pressurized reactor 1, and the carbon monoxide inlet of the circulation pipe 21 is connected to the top outlet of the pressurized reactor 1. This invention, by setting up a carbon monoxide circulating bubbling device, utilizes the gas circulation of carbon monoxide to achieve bubbling mixing and increase the gas-liquid contact surface, replacing conventional mechanical stirring, which is beneficial for promoting more uniform mixing of the reaction raw materials. Furthermore, this apparatus can continuously replenish the carbon monoxide consumed in the reaction for continuous synthesis of ammonium formate.

[0042] It should be noted that this utility model is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and function as the technical concept within the scope of this utility model are included within the technical scope of this utility model. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, are also included within the scope of this utility model without departing from the spirit of this utility model.

Claims

1. An apparatus for the continuous synthesis of ammonium formate based on the carbon monoxide bubbling method, characterized in that, Includes a pressurized reactor and a carbon monoxide circulating bubbling device connected to the pressurized reactor; The carbon monoxide circulating bubbling device includes a circulation pipe, a pressurized circulation pump installed in the circulation pipe, and a carbon monoxide replenishment pipe connected to the circulation pipe; the carbon monoxide outlet of the circulation pipe is connected to the bottom air inlet of the pressurized reactor, and the carbon monoxide inlet of the circulation pipe is connected to the top air outlet of the pressurized reactor.

2. The apparatus for continuous synthesis of ammonium formate based on carbon monoxide bubbling method according to claim 1, characterized in that, The apparatus for the continuous synthesis of ammonium formate based on the carbon monoxide bubbling method also includes a feed pipe and a discharge pipe connected to the pressurized reactor.

3. The apparatus for continuous synthesis of ammonium formate based on carbon monoxide bubbling method according to claim 2, characterized in that, One end of the feed pipe is connected to the raw material supply device, and the other end is connected to the bottom of the pressurized reactor.

4. The apparatus for continuous synthesis of ammonium formate based on carbon monoxide bubbling method according to claim 2, characterized in that, One end of the discharge pipe is connected to the reaction liquid collection device, and the other end is connected to the side wall of the pressurized reactor.

5. The apparatus for continuous synthesis of ammonium formate based on carbon monoxide bubbling method according to claim 4, characterized in that, A filter is installed at the connection between the discharge pipe and the side wall of the pressurized reactor to prevent solid catalyst from flowing out through the discharge pipe.

6. The apparatus for continuous synthesis of ammonium formate based on carbon monoxide bubbling method according to claim 4, characterized in that, The connection between the discharge pipe and the side wall of the pressurized reactor is located above the middle of the pressurized reactor, and the liquid level in the pressurized reactor is not lower than the height of the discharge pipe.

7. The apparatus for continuous synthesis of ammonium formate based on carbon monoxide bubbling method according to claim 2, characterized in that, Flow valves are respectively installed in the feed pipe and the discharge pipe.

8. The apparatus for continuous synthesis of ammonium formate based on carbon monoxide bubbling method according to claim 1, characterized in that, The connection between the carbon monoxide replenishment pipeline and the circulation pipeline is located between the pressurized circulation pump and the carbon monoxide inlet of the circulation pipeline.

9. The apparatus for continuous synthesis of ammonium formate based on carbon monoxide bubbling method according to claim 1, characterized in that, One end of the carbon monoxide replenishment pipeline is connected to the carbon monoxide supply device.

10. The apparatus for continuous synthesis of ammonium formate based on carbon monoxide bubbling method according to claim 1, characterized in that, The pressurized reactor is equipped with a pressure monitoring device.

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