Monomethylamine hydrochloride synthesis kettle with high reaction rate
By designing liquid-passing pipes, gas-transporting pipes, and drainage pipes in the monomethylamine hydrochloride synthesis reactor, the contact area and stirring of hydrochloric acid and methylamine gas are increased, solving the problem of wasted unreacted gas and achieving a higher reaction rate and production efficiency.
Patent Information
- Application Number
- CN202520099188.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-01-16
AI Technical Summary
In a current methylamine hydrochloride synthesis reactor, unreacted methylamine gas rises, leading to waste and a reduced reaction rate, thus affecting production efficiency.
A synthesis reactor was designed to mix hydrochloric acid and methylamine gas through a liquid inlet pipe and a gas outlet pipe, and to accelerate the reaction by stirring with a stirring rod. Unreacted methylamine gas is reintroduced into the synthesis reactor through a drain pipe to contact the hydrochloric acid, thereby increasing the contact area.
It improved the reaction rate and production efficiency, shortened the reaction time, and reduced the waste of methylamine gas.
Smart Images
Figure CN223832312U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of monomethylamine hydrochloride processing equipment, specifically a monomethylamine hydrochloride synthesis reactor with a high reaction rate. Background Technology
[0002] Methylamine hydrochloride is an organic compound with the chemical formula CH5N·HCl and a molecular weight of 67.52 g / mol. It typically occurs as a white crystalline or crystalline powder. It is relatively stable at room temperature, with a melting point of approximately 170-180°C. It is soluble in water and some organic solvents, such as methanol and ethanol. Methylamine hydrochloride is usually obtained by reacting methylamine gas (CH3NH2) with hydrochloric acid (HCl). This reaction is an acid-base neutralization reaction, producing crystalline methylamine hydrochloride. Methylamine hydrochloride is an important reagent and intermediate in organic synthesis. It can be used to synthesize various organic compounds, such as pharmaceuticals, dyes, and fragrances. It has wide applications in condensation reactions, amination reactions, and amino protection reactions.
[0003] Currently, in the process of synthesizing monomethylamine hydrochloride, a certain amount of hydrochloric acid, methylamine gas, and an appropriate amount of catalyst are usually added into the synthesis reactor, and the reaction is accelerated by driving the stirring rod to rotate and mix the hydrochloric acid and methylamine gas.
[0004] Therefore, in the existing monomethylamine hydrochloride synthesis reactor, during the process of reacting hydrochloric acid with methylamine gas to synthesize monomethylamine hydrochloride, some unreacted methylamine gas rises into the synthesis reactor, which not only causes waste but also affects the reaction rate and the production efficiency of monomethylamine hydrochloride, and thus needs to be improved. Utility Model Content
[0005] The purpose of this invention is to provide a high-rate monomethylamine hydrochloride synthesis reactor, which increases the contact area between methylamine gas and hydrochloric acid, effectively improves the reaction rate, shortens the reaction time, and thus improves the production efficiency of monomethylamine hydrochloride.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-rate monomethylamine hydrochloride synthesis reactor, comprising a synthesis reactor body, a motor installed on the upper end face of the synthesis reactor body, the output end of the motor penetrating through the upper end face of the synthesis reactor body and equipped with a stirring rod, a first annular tube installed in the middle of the interior of the synthesis reactor body, and a plurality of vent pipes installed on the inner side wall of the synthesis reactor body communicating with the bottom end face of the first annular tube.
[0007] The bottom of the right side wall of the synthesis reactor body is connected to a connecting pipe. The other end of the connecting pipe is detachably connected to an upper liquid pipe by bolts. A fluoroplastic magnetic pump is installed on the outer side wall of the upper liquid pipe via a mounting plate and is mounted on the outer side wall of the synthesis reactor body. The other end of the upper liquid pipe passes through the upper end of the right side wall of the synthesis reactor body and is connected to a spray pipe installed on the inner side wall of the synthesis reactor body. The top surface of the synthesis reactor body is connected to a drain pipe. The other end of the drain pipe is connected to a second annular ring installed on the outer side wall of the synthesis reactor body. The inner side wall of the second annular ring is connected to multiple gas outlet pipes that pass through the outer side wall of the synthesis reactor body.
[0008] To facilitate control of the rate at which methylamine gas is introduced into the gas delivery pipe, in a preferred embodiment of this invention, a methylamine hydrochloride synthesis reactor with a high reaction rate, wherein the outer wall of the first annular pipe is connected to a gas delivery pipe, the other end of which penetrates the inner wall of the synthesis reactor body and extends to the outside of the synthesis reactor body, and a valve is installed on the outer wall of the other end.
[0009] To facilitate the reintroduction of unreacted methylamine gas into the interior of the synthesis reactor body through the inlet pipe, in a preferred embodiment of this invention for a high-reaction-rate monomethylamine hydrochloride synthesis reactor, a gas pump is installed on the outer wall of the inlet pipe, and a mounting plate fixedly connected to the synthesis reactor body is installed on the bottom end face of the gas pump.
[0010] In order to filter the hydrochloric acid entering the upper liquid pipe, as a preferred embodiment of the present invention for a high-reaction-rate monomethylamine hydrochloride synthesis reactor, a filter screen is installed inside the upper liquid pipe on the left side of the fluoroplastic magnetic pump.
[0011] In order to allow hydrochloric acid to be introduced into the interior of the synthesis reactor body, a preferred embodiment of the present invention, a high-reaction-rate monomethylamine hydrochloride synthesis reactor, is provided with a liquid passage pipe connected to the upper end of the left side wall of the synthesis reactor body.
[0012] To facilitate the spraying of hydrochloric acid through the spray pipe, in the preferred embodiment of this invention, a high-reaction-rate monomethylamine hydrochloride synthesis reactor, the spray pipe is annular and has multiple nozzles installed on its bottom end face.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0014] This invention introduces a certain amount of hydrochloric acid into the interior of the synthesis reactor through a liquid inlet pipe, and introduces methylamine gas into the hydrochloric acid through a gas inlet pipe, a first annular pipe, and multiple gas inlets, thereby allowing the methylamine gas to react with the hydrochloric acid. At the same time, the hydrochloric acid is stirred by a motor and a stirring rod to ensure that the hydrochloric acid and methylamine gas have more complete contact and reaction, thereby accelerating the reaction process, increasing the reaction efficiency, and generating monomethylamine hydrochloride.
[0015] During the reaction, hydrochloric acid is introduced into the spray pipe through the liquid inlet pipe for spraying. At the same time, unreacted methylamine gas can be reintroduced into the interior of the synthesis reactor through the drainage pipe. This allows the sprayed hydrochloric acid to come into contact with the unreacted methylamine gas and react, increasing the contact area between the methylamine gas and hydrochloric acid, further increasing the reaction efficiency, thereby effectively improving the reaction rate, shortening the reaction time, and ultimately improving the production efficiency of monomethylamine hydrochloride. Attached Figure Description
[0016] Figure 1 This is an overall structural diagram of the present invention;
[0017] Figure 2 This is a cross-sectional view of the overall structure of this utility model;
[0018] Figure 3 This is a top view of the second annular ring of this utility model;
[0019] Figure 4 This is a bottom view of the first annular ring of this utility model.
[0020] In the diagram: 1. Synthesis vessel body; 101. Liquid inlet pipe; 2. Motor; 201. Stirring rod; 3. First annular pipe; 301. Gas inlet pipe; 302. Gas delivery pipe; 4. Connecting pipe; 401. Liquid inlet pipe; 402. Fluoroplastic magnetic pump; 403. Filter screen; 5. Spray pipe; 6. Drainage pipe; 601. Air pump; 7. Second annular ring; 701. Gas outlet pipe. Detailed Implementation
[0021] Please see Figures 1 to 4 A high-rate monomethylamine hydrochloride synthesis reactor includes a synthesis reactor body 1, a motor 2 installed on the upper end face of the synthesis reactor body 1, the output end of the motor 2 passing through the upper end face of the synthesis reactor body 1 and equipped with a stirring rod 201, a first annular pipe 3 installed in the middle of the interior of the synthesis reactor body 1, and a plurality of vent pipes 301 installed on the inner side wall of the synthesis reactor body 1 connected to the bottom end face of the first annular pipe 3.
[0022] A connecting pipe 4 is connected to the bottom of the right side wall of the synthesis reactor body 1. The other end of the connecting pipe 4 is detachably connected to an upper liquid pipe 401 by bolts. A fluoroplastic magnetic pump 402 is installed on the outer side wall of the upper liquid pipe 401 via a mounting plate and is mounted on the outer side wall of the synthesis reactor body 1. The other end of the pump penetrates the upper end of the right side wall of the synthesis reactor body 1 and is connected to a spray pipe 5 installed on the inner side wall of the synthesis reactor body 1. A drain pipe 6 is connected to the top surface of the synthesis reactor body 1. The other end of the drain pipe 6 is connected to a second annular ring 7 installed on the outer side wall of the synthesis reactor body 1. Multiple air outlet pipes 701 that penetrate the outer side wall of the synthesis reactor body 1 are connected to the inner side wall of the second annular ring 7.
[0023] In this embodiment: a certain amount of hydrochloric acid is introduced into the interior of the synthesis reactor body 1 through the liquid inlet pipe 101. Then, a certain amount of methylamine gas is introduced into the first annular pipe 3 at a constant speed through the gas inlet pipe 302, so that multiple gas inlets 301 introduce methylamine gas into the hydrochloric acid, thereby allowing the methylamine gas to react with the hydrochloric acid. At the same time, the motor 2 is started, so that the stirring rod 201 stirs the hydrochloric acid, allowing the hydrochloric acid and methylamine gas to come into more complete contact and react, accelerating the reaction process, increasing the reaction efficiency, and thus generating monomethylamine hydrochloride.
[0024] During the reaction, the fluoroplastic magnetic pump 402 and the air pump 601 are started simultaneously. The hydrochloric acid in the synthesis reactor body 1 is filtered by the filter screen 403 and then sprayed into the spray pipe 5 through the liquid inlet pipe 401. At the same time, the air pump 601 can reintroduce unreacted methylamine gas into the interior of the synthesis reactor body 1 through the guide pipe 6. This allows the sprayed hydrochloric acid to come into contact with the unreacted methylamine gas and react, which increases the contact area between the methylamine gas and the hydrochloric acid, further increasing the reaction efficiency. This effectively increases the reaction rate, shortens the reaction time, and thus improves production efficiency.
[0025] As a technical optimization of this utility model, the outer wall of the first annular pipe 3 is connected to a gas supply pipe 302, the other end of the gas supply pipe 302 penetrates the inner wall of the synthesis vessel body 1 and extends to the outside of the synthesis vessel body 1, and a valve is installed on the outer wall of the other end.
[0026] In this embodiment: the gas supply pipe 302 facilitates the introduction of methylamine gas into the interior of the synthesis reactor body 1, and the valve facilitates the control of the introduction rate of methylamine gas into the gas supply pipe 302.
[0027] As a technical optimization of this utility model, an air pump 601 is installed on the outer wall of the drainage pipe 6, and an installation plate that is fixedly connected to the synthesis reactor body 1 is installed on the bottom end face of the air pump 601.
[0028] In this embodiment: by setting up a gas pump 601, it is convenient to reintroduce unreacted methylamine gas into the interior of the synthesis reactor body 1 through the guide pipe 6.
[0029] As a technical optimization of this utility model, a filter screen 403 located on the left side of the fluoroplastic magnetic pump 402 is installed inside the upper liquid pipe 401.
[0030] In this embodiment: the filter screen 403 is a polyvinylidene fluoride (PVDF) filter screen, which has corrosion-resistant properties and can filter the monomethylamine hydrochloride crystals produced by the reaction, preventing the monomethylamine hydrochloride crystals from entering the upper liquid pipe 401 along with the hydrochloric acid.
[0031] As a technical optimization of this utility model, the upper end of the left side wall of the synthesis reactor body 1 is connected to a liquid passage pipe 101.
[0032] In this embodiment, by setting up a liquid passage pipe 101, hydrochloric acid can be easily passed into the interior of the synthesis reactor body 1.
[0033] As a technical optimization of this utility model, the spray pipe 5 is annular and has multiple nozzles installed on its bottom end face.
[0034] In this embodiment, multiple nozzles are installed at the bottom of the spray pipe 5 to facilitate the uniform spraying of hydrochloric acid.
[0035] Working principle: First, all components of the device are made of corrosion-resistant materials. The device is connected to an external power source and an external control panel, and the control panel is electrically connected to each component. Then, a certain amount of hydrochloric acid is introduced into the synthesis reactor body 1 through the liquid inlet pipe 101, and the level of hydrochloric acid in the synthesis reactor body 1 does not exceed the first annular pipe 3 (the gas outlets of multiple vent pipes 301 are located in the hydrochloric acid). Next, a suitable amount of methylamine gas is introduced into the first annular pipe 3 through the gas delivery pipe 302, and the introduction rate of methylamine gas is controlled by a valve to ensure that the methylamine gas enters the first annular pipe 3 at a uniform speed and is introduced into the hydrochloric acid through multiple vent pipes 301, thereby allowing the methylamine gas to react with the hydrochloric acid (an appropriate amount of catalyst is added as needed). At the same time, the motor 2 is started, causing the stirring rod 201 to stir the hydrochloric acid, thereby allowing the hydrochloric acid and methylamine gas to come into more complete contact and react, accelerating the reaction process, increasing the reaction efficiency, and thus generating monomethylamine hydrochloride.
[0036] During the reaction, the fluoroplastic magnetic pump 402 and the air pump 601 are simultaneously activated via the control panel. This allows the hydrochloric acid in the synthesis reactor body 1 to be filtered through the filter screen 403 and then introduced into the spray pipe 5 through the liquid inlet pipe 401. This allows multiple nozzles to spray the hydrochloric acid. At the same time, the air pump 601 can reintroduce unreacted methylamine gas into the interior of the synthesis reactor body 1 through the drainage pipe 6. This allows the sprayed hydrochloric acid to come into contact with the unreacted methylamine gas and react, increasing the contact area between the methylamine gas and the hydrochloric acid, and further increasing the reaction efficiency.
[0037] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A high-rate monomethylamine hydrochloride synthesis reactor, comprising a reactor body (1), characterized in that: A motor (2) is installed on the upper end face of the synthesis reactor body (1). The output end of the motor (2) passes through the upper end face of the synthesis reactor body (1) and is equipped with a stirring rod (201). A first annular pipe (3) is installed in the middle of the interior of the synthesis reactor body (1). The bottom end face of the first annular pipe (3) is connected to a plurality of vent pipes (301) installed on the inner side wall of the synthesis reactor body (1). The bottom of the right side wall of the synthesis reactor body (1) is connected to a connecting pipe (4). The other end of the connecting pipe (4) is detachably connected to an upper liquid pipe (401) by bolts. A fluoroplastic magnetic pump (402) is installed on the outer side wall of the upper liquid pipe (401) by a mounting plate. The other end of the upper liquid pipe (401) passes through the upper end of the right side wall of the synthesis reactor body (1) and is connected to a spray pipe (5) installed on the inner side wall of the synthesis reactor body (1). The top surface of the synthesis reactor body (1) is connected to a drain pipe (6). The other end of the drain pipe (6) is connected to a second annular ring (7) installed on the outer side wall of the synthesis reactor body (1). The inner side wall of the second annular ring (7) is connected to multiple air outlet pipes (701) that pass through the outer side wall of the synthesis reactor body (1).
2. The high-rate monomethylamine hydrochloride synthesis reactor according to claim 1, characterized in that: The outer wall of the first annular pipe (3) is connected to a gas supply pipe (302). The other end of the gas supply pipe (302) penetrates the inner wall of the synthesis vessel body (1) and extends to the outside of the synthesis vessel body (1). A valve is installed on the outer wall of the other end.
3. The high-rate monomethylamine hydrochloride synthesis reactor according to claim 1, characterized in that: An air pump (601) is installed on the outer wall of the drainage pipe (6), and an installation plate that is fixedly connected to the synthesis reactor body (1) is installed on the bottom end face of the air pump (601).
4. The high-rate monomethylamine hydrochloride synthesis reactor according to claim 1, characterized in that: The upper liquid pipe (401) is equipped with a filter screen (403) located to the left of the fluoroplastic magnetic pump (402).
5. The high-rate monomethylamine hydrochloride synthesis reactor according to claim 1, characterized in that: The upper end of the left side wall of the synthesis reactor body (1) is connected to a liquid passage pipe (101).
6. The high-rate monomethylamine hydrochloride synthesis reactor according to claim 1, characterized in that: The spray pipe (5) is annular and has multiple nozzles installed on its bottom end.