CN219540269U - Device for continuously producing N-methyl sodium taurate - Google Patents
Device for continuously producing N-methyl sodium taurate Download PDFInfo
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- CN219540269U CN219540269U CN202320640122.1U CN202320640122U CN219540269U CN 219540269 U CN219540269 U CN 219540269U CN 202320640122 U CN202320640122 U CN 202320640122U CN 219540269 U CN219540269 U CN 219540269U
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Abstract
The utility model discloses a device for continuously producing N-methyl sodium taurate, which comprises: the continuous pipe reactor is connected with the outlet of the constant flow feed pump, the outlet of the continuous pipe reactor is connected with the feed inlet of the upper collecting tank through a product pipe, and a discharge valve is arranged on the product pipe; the bottom discharge hole of the upper collecting tank is connected with the lower collecting tank through a discharge pipe, and a discharge valve is arranged on the discharge pipe; the upper part of the upper collecting tank and the upper part of the lower collecting tank are provided with communicated air pressure balance pipes; the top of the upper collecting tank is provided with a high-pressure air inlet pipe and a pressure regulating exhaust pipe; the pressure regulating exhaust pipe is respectively connected with the nitrogen supply equipment and the air compressor; the bottom of the lower collecting tank is provided with a discharge pipe. The method is simple and efficient, and the reaction conversion rate is more than or equal to 97%; the requirements of the severe reaction conditions on the production environment can be reduced, and the applicability is strong; ensure the safety of the production process, pressure relief and sampling.
Description
Technical Field
The utility model belongs to the technical field of production of N-sodium methyltaurine, and particularly relates to a device for continuously producing N-sodium methyltaurine.
Background
N-methyl sodium taurate (CAS number 4316-74-9, molecular formula C) 3 H 8 NNaO 3 S) is an important derivative of sodium taurine and is widely used as an important intermediate of daily chemicals, medicines and surfactants.
The existing synthetic methods of the N-methyl sodium taurate include the following steps: direct N-methylation, reductive amination, oxazolidone intermediate and taurine, and special methods including reductive alkylation of alpha-azido compounds, diazomethane N-methylation of p-nitrobenzenesulfonyl protected amino groups, etc. Among these methods, the direct N-methylation method is highly toxic and expensive as a raw material (CH as a raw material) 3 I) The method comprises the steps of carrying out a first treatment on the surface of the The reductive amination method can be completed by multiple steps of reactions, which is easy to cause lower overall yield of the reaction; the direct N-methylation process and the oxazolidone intermediate process produce racemization; the special method and the taurine method have higher requirements on raw materials, complicated steps, relatively harsh conditions and difficult industrialized amplification.
The method adopts methylamine and sodium isethionate as raw materials, and synthesizes the N-methyl sodium taurate by one-step ammonolysis under the action of a strong alkaline catalyst, has the advantages of simple process route, high yield, environmental protection, easy industrialization and the like, and is an important method capable of realizing large-scale industrial production. The device for producing the N-methyl sodium taurate by adopting the method comprises a batch kettle type reactor and a continuous tubular reactor.
Patent document CN110903222a uses methylamine and sodium isethionate as raw materials, sodium isethionate is dissolved in water, methylamine and a heterogeneous catalyst are added to the solution, batch reaction is performed in a high-pressure batch-type reactor, and the catalyst is selected from Zn 5 (CO 3 ) 2 (OH) 6 、Ni 2 ZrO 4 、Zn 5 (CO 3 ) 2 (OH) 6 /Ni 2 ZrO 4 The method comprises the steps of carrying out a first treatment on the surface of the Finally, the N-methyl sodium taurate is obtained through the steps of demethanization, neutralization, crystallization separation and the like, the yield can reach 85.0 to 95.0 percent, and the selectivity is more than or equal to 98 percent. However, the method is constrained by the sequential process of feeding, preheating, reacting and discharging in an intermittent production mode, and has the defects of long production period, large reaction device, high energy consumption, low operation elasticity, low safety coefficient and the like, and the high-pressure condition also causes great potential safety hazard in frequent intermittent operation conversion.
Patent document CN215799244U discloses a device for producing sodium N-methyltaurine using a multi-tank series system. Compared with a simple batch reactor, the device can improve the production strength and the productivity to a certain extent, but has the advantages of complex device, high requirement and increased operation difficulty, and a plurality of reaction kettles are required to be invested with a large amount of funds so as to reduce the income. Most importantly, the process still belongs to batch operation, and the operation mode of the existing process is not changed.
Patent document CN102675160a discloses a device for continuously producing sodium N-methyltaurine by piping, comprising charging sodium isethionate, monomethylamine and a catalyst in a ratio into a tank, pressurizing to a desired pressure by a booster pump, and setting a residence time to complete the reaction. Although this reactor allows continuous production of sodium N-methyltaurine, the process has drawbacks such as: when the reaction is started, the reaction temperature, the reaction pressure and the reaction airspeed are not stable, at the moment, the index of the produced N-methyl sodium taurate is lower, the device can not collect unstable materials and stable materials separately, and the total level of products in the materials finally collected is lower; in addition, the device does not mention a pressure relief method, and the safety of the whole experimental process cannot be ensured.
The apparatus for producing sodium N-methyltaurine of patent document CN112010786a connects an amination reaction vessel and a tubular reactor in series, wherein a micro-interface reactor is provided in the amination reaction vessel to increase the phase boundary area between the gas phase and the liquid phase. However, the device is focused on the separation of materials after the reaction, and relates to a plurality of gas-liquid separation tanks and a plurality of heat exchangers, the device is complex, the reaction time cost is high, and after two micro-interface reactors are used in series, the conversion rate is 94 percent.
In summary, the development of a reaction device for continuously synthesizing the sodium N-methyltaurine, which is simple and efficient, is simple to operate, has a short production period, can separate and collect stable materials from unstable materials, and has high safety coefficient, has great significance.
Disclosure of Invention
The utility model aims to provide a device for continuously producing N-methyl sodium taurate, which solves the problems of complex device, difficult operation, long production period, high risk and the like in the prior art.
The aim of the utility model is achieved by the following technical scheme:
the utility model relates to a device for continuously producing N-methyl sodium taurate, which is characterized by comprising: the continuous pipe reactor is connected with the outlet of the constant flow feed pump, the outlet of the continuous pipe reactor is connected with the feed inlet of the upper collecting tank through a product pipe, and a discharge valve is arranged on the product pipe; the bottom discharge hole of the upper collecting tank is connected with the lower collecting tank through a discharge pipe, and a discharge valve is arranged on the discharge pipe; the upper part of the upper collecting tank and the upper part of the lower collecting tank are provided with communicated air pressure balance pipes for balancing the pressure in the two collecting tanks; the top of the upper collecting tank is provided with a high-pressure air inlet pipe and a pressure regulating exhaust pipe; the pressure regulating exhaust pipe is respectively connected with the nitrogen supply equipment and the air compressor; the bottom of the lower collecting tank is provided with a discharge pipe.
Compared with the prior art, the utility model has the following advantages:
the utility model is skillfully designed to collect stable materials and unstable materials respectively; flash evaporation can be avoided during sampling, and production efficiency is guaranteed; the device can stably and continuously produce the N-methyl sodium taurate, is simple and efficient, and has the reaction conversion rate of more than or equal to 97 percent; the requirements of the severe reaction conditions on the production environment can be reduced, and the applicability is strong; ensure the safety of the production process, pressure relief and sampling.
Drawings
FIG. 1 is a schematic view of the apparatus of the present utility model;
in the figure: 1-a constant flow feeding pump, 2-a continuous tubular reactor, 3-an upper collecting tank and 4-a lower collecting tank; l1-product pipe, L2-discharge pipe, L3-air pressure balance pipe, L4-high pressure air inlet pipe, L5-pressure regulating exhaust pipe and L6-discharge pipe; v1-discharge valve, V2-discharge valve, V3-pressure regulating valve, V4-stop valve, V5-pressure reducing valve, V6-discharge valve, V7-standby pressure valve and V8-explosion-proof valve.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described with reference to the drawings of the embodiments of the present utility model, and it should be recognized by those skilled in the art that the embodiments are only for illustrating the present utility model, not for limiting the present utility model, and that the embodiments may be modified and altered within the scope of the claims of the present utility model.
As shown in fig. 1. An apparatus for continuously producing sodium N-methyltaurine, comprising: the continuous pipe type reactor 2 is connected with the outlet of the constant flow feeding pump 1, the outlet of the continuous pipe type reactor 2 is connected with the feeding port of the upper collecting tank 3 through a product pipe L1, and a discharging valve V1 is arranged on the product pipe L1; the bottom discharge hole of the upper collection tank 3 is connected with the lower collection tank 4 through a discharge pipe L2, and a discharge valve V2 is arranged on the discharge pipe L2; a communicated air pressure balance pipe L3 is arranged at the upper part of the upper collecting tank 3 and the upper part of the lower collecting tank 4 and is used for balancing the pressure in the two collecting tanks; the top of the upper collecting tank 3 is provided with a high-pressure air inlet pipe L4 and a pressure-regulating exhaust pipe L5; the high-pressure air inlet pipe L4 is respectively connected with nitrogen supply equipment and an air compressor; the bottom of the lower collecting tank 4 is provided with a discharge pipe L6.
Further, a pressure regulating valve V3 is provided on the air pressure balance pipe L3; a shutoff valve V4 and a pressure reducing valve V5 are provided on the high pressure intake pipe L4.
Further, a discharge valve V6 is provided on the discharge pipe L6, and serves not only as a discharge valve of the lower collection tank 4, but also as a relief valve of the upper collection tank 3 and the lower collection tank 4.
Further, a pressure-regulating valve V7 is provided on the pressure-regulating exhaust pipe L5 for regulating the pressures in the upper and lower collection tanks 3 and 4 before and during the reaction.
Further, the continuous tube reactor 2 is heated by an oil bath or an electric heating belt; the upper collecting tank 3 is a kettle type tank with a condensed water jacket; the discharging valve V1, the discharging valve V2 and the discharging valve V6 are needle type valves or ball valves.
Further, an explosion-proof pipe is arranged on the pressure-regulating exhaust pipe L5, an explosion-proof valve V8 is arranged on the explosion-proof pipe and is communicated with the outside, and the explosion-proof pipe is a second defense line for guaranteeing the safety of the device except the discharge valve V6.
The operation process of the utility model is as follows: setting the temperature of the continuous pipe reactor 2; opening the pressure regulating valve V3, the shut-off valve V4 and the pressure reducing valve V5; n (N) 2 The whole reaction device is filled with the pressure reducing valve V5 and the stop valve V4, so that the purpose of preliminary pressure increase is realized; opening an air compressor, and adjusting a pressure preparation valve V7 to the pressure required by the reaction; the reaction raw materials of sodium isethionate, monomethylamine and sodium hydroxide serving as a catalyst enter a tubular reactor 2 soaked in an oil bath device through a constant flow feed pump 1 to react to generate a product of sodium N-methyltaurine and water; the initial mixed product flows into the upper collection tank 3 through the discharge valve V1, and then flows into the lower collection tank 4 through the discharge valve V2 to obtain unstable materials (due to the flow rate and the constant flow pump at the beginning of the reaction)The system pressure did not reach full stability, so the product synthesized under this condition was considered as unstable material); along with the extension of time, each process condition in the device tends to be stable, when the sample injection time is 2-3 times of the residence time, the synthesized product is a stable material, at the moment, the discharging valve V2 is closed, and the stable material is collected in the upper collecting tank 3; after the reaction is completed, the shut-off valve V4 and the pressure reducing valve V5 are closed to stop the pressure supply; opening a discharge valve V6, and slowly discharging unstable materials and the pressure in the device; and when the pressure gauge is zero, opening the material valve V2 to release the stable material.
Claims (6)
1. An apparatus for continuously producing sodium N-methyltaurine, comprising: the continuous tubular reactor (2) is connected with the outlet of the constant flow feeding pump (1), the outlet of the continuous tubular reactor (2) is connected with the feeding port of the upper collecting tank (3) through a product pipe (L1), and a discharging valve (V1) is arranged on the product pipe (L1); the bottom discharge hole of the upper collecting tank (3) is connected with the lower collecting tank (4) through a discharge pipe (L2), and a discharge valve (V2) is arranged on the discharge pipe (L2); an air pressure balance pipe (L3) communicated with the upper part of the upper collecting tank (3) and the upper part of the lower collecting tank (4) is arranged; the top of the upper collecting tank (3) is provided with a high-pressure air inlet pipe (L4) and a pressure-regulating exhaust pipe (L5); the high-pressure air inlet pipe (L4) is respectively connected with nitrogen supply equipment and an air compressor; the bottom of the lower collecting tank (4) is provided with a discharge pipe (L6).
2. The device for continuously producing sodium N-methyltaurine according to claim 1, characterized in that a pressure regulating valve (V3) is provided on said air pressure balancing pipe (L3); a stop valve (V4) and a pressure reducing valve (V5) are arranged on the high-pressure air inlet pipe (L4).
3. The apparatus for continuously producing sodium N-methyltaurine according to claim 1, wherein a discharge valve (V6) is provided on the discharge pipe (L6).
4. The device for continuously producing sodium N-methyltaurine according to claim 1, wherein a pressure-regulating valve (V7) is provided on the pressure-regulating exhaust pipe (L5).
5. The apparatus for continuously producing sodium N-methyltaurine according to claim 1, wherein the continuous tubular reactor (2) is heated by an oil bath or an electric heating belt; the upper collecting tank (3) is a kettle type tank with a condensed water jacket; the discharging valve (V1), the discharging valve (V2) and the discharging valve (V6) are needle valves or ball valves.
6. The device for continuously producing the sodium N-methyltaurine according to claim 1, wherein the pressure-regulating exhaust pipe (L5) is provided with an explosion-proof pipe, and the explosion-proof pipe is provided with an explosion-proof valve (V8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320640122.1U CN219540269U (en) | 2023-03-28 | 2023-03-28 | Device for continuously producing N-methyl sodium taurate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320640122.1U CN219540269U (en) | 2023-03-28 | 2023-03-28 | Device for continuously producing N-methyl sodium taurate |
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| CN219540269U true CN219540269U (en) | 2023-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320640122.1U Active CN219540269U (en) | 2023-03-28 | 2023-03-28 | Device for continuously producing N-methyl sodium taurate |
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