Reaction kettle for synthesizing cocoyl glycinate

Abstract

The utility model belongs to chemical equipment technical field provides a kind of reaction kettle for cocoyl glycinate synthesis, including the kettle main body being provided with inner kettle body and outer kettle body, inner kettle body is provided with reaction cavity, outer kettle body is sleeved in inner kettle body outside and forms isolation cavity between both, inner kettle body is provided with cooling jacket, cooling jacket is located in isolation cavity;Kettle main body top is provided with main feeding port, lye filling port and cocoyl chloride dropping port, lye filling port position is provided with lye filling pump, and cocoyl chloride dropping port position is provided with precooling component.The utility model provides the reaction kettle for cocoyl glycinate synthesis, by lye filling port and lye filling pump injection lye, to carry out regulation and control to pH in synthesis reaction process, simultaneously by cooling jacket and precooling component synergic temperature control, ensure that in low temperature environment state in synthesis reaction process, to improve synthesis reaction efficiency and product purity and product yield.

Description

Technical Field

[0001] This utility model belongs to the field of chemical equipment technology, and specifically relates to a reaction vessel for the synthesis of cocoyl glycinate salt. Background Technology

[0002] As a mild surfactant, the synthesis of cocoyl glycinate requires extremely stringent reaction conditions, especially low temperature (0-20℃) and precise pH control. However, existing reactor equipment has significant shortcomings in such synthesis processes: First, it relies on traditional mechanical manual or semi-automatic pH adjustment devices, which have slow response and limited accuracy, making it difficult to achieve real-time, dynamic, and precise control of pH during the reaction process. This easily leads to side reactions caused by pH fluctuations exceeding the optimal range, affecting the purity and yield of the synthesized product. Second, there is currently no dedicated low-temperature dropping design for the key raw material cocoyl chloride. This makes it impossible to achieve low-temperature dropping during the injection of cocoyl chloride, which easily causes temperature fluctuations in the reactants within the reactor, further exacerbating the risk of side reactions. In addition, under the set low-temperature conditions, the viscosity of the reactants generally increases. Without stirring, the mixing efficiency of the low-temperature, high-viscosity fluid will be insufficient, easily leading to incomplete mixing of materials within the reactor, resulting in inconsistent reaction progress and unstable product quality. These problems seriously restrict the stable and efficient synthesis and production of cocoyl glycinate.

[0003] Therefore, it is necessary to design a reaction vessel for the synthesis of cocoyl glycinate that can at least solve some of the above problems and defects. Summary of the Invention

[0004] To address the above-mentioned technical problems, this invention proposes a reaction vessel for the synthesis of cocoyl glycinate. Alkali solution is injected through an alkali inlet and an alkali inlet pump to regulate the pH during the synthesis reaction. Simultaneously, a cooling jacket and a pre-cooling component located at the cocoyl chloride droplet are used to control the temperature, ensuring that the synthesis reaction is conducted in a low-temperature environment, thereby improving the synthesis reaction efficiency, product purity, and product yield.

[0005] The technical solution of this utility model is:

[0006] This utility model proposes a reaction vessel for the synthesis of cocoyl glycinate, comprising a vessel body with an inner vessel body and an outer vessel body. The inner vessel body is provided with a reaction chamber, and the outer vessel body is sleeved on the outside of the inner vessel body, forming an isolation chamber between the two. The inner vessel body is provided with a cooling jacket fixedly sleeved on its outer wall, and the cooling jacket is located inside the isolation chamber.

[0007] The top of the reactor body is provided with a main feed port, an alkali injection port, and a cocoyl chloride dripping port that are connected to the reaction chamber. An alkali injection pump is provided at the alkali injection port, and a pre-cooling component is provided at the cocoyl chloride dripping port to pre-cool the cocoyl chloride dripped into the reaction chamber.

[0008] Preferably, the precooling assembly includes a precooling dripping pipe connected to the cocoyl chloride dripping port, a precooling coil sleeved around the precooling dripping pipe, and a precooling box fixedly installed on the top of the reactor body;

[0009] Both the precooling dripping pipe and the precooling coil are fixedly installed inside the precooling chamber, with the precooling dripping pipe penetrating through the precooling chamber and extending outward.

[0010] Preferably, the cooling jacket is provided with a first liquid inlet and a first liquid outlet connected thereto, both of which penetrate the side wall of the outer vessel and extend outward;

[0011] The precooling coil is provided with a second liquid inlet and a second liquid outlet, both of which penetrate the side wall of the precooling chamber and extend outward.

[0012] Preferably, the reactor body is further provided with a temperature monitoring component, a pH monitoring component, and a pressure monitoring component fixedly connected thereto. The temperature monitoring component, the pH monitoring component, and the pressure monitoring component all penetrate the reactor walls of the inner reactor body and the outer reactor body and extend into the reaction chamber to monitor the temperature, pH, and pressure parameters in real time during the synthesis reaction process.

[0013] Preferably, the bottom of the reactor body is provided with a discharge port that communicates with the reaction chamber and a discharge valve located at the discharge port.

[0014] Preferably, the vessel body is further provided with a stirring assembly fixedly connected thereto. The stirring assembly includes a stirring motor fixedly installed on the top of the vessel body, a stirring shaft connected to the stirring motor, and at least one stirring paddle installed on the stirring shaft.

[0015] The agitator is positioned near the end of the agitator shaft.

[0016] Preferably, the stirring paddle is provided with a plurality of blades evenly spaced along the circumferential direction with the stirring shaft axis as the center, and the blades are provided with a plurality of through holes.

[0017] This utility model has the following advantages and effects compared with the prior art:

[0018] (1) An outer vessel body is used, which is fitted on the outside of the inner vessel body. An isolation cavity is formed between the inner vessel body and the outer vessel body. A cooling jacket is provided on the outer wall of the inner vessel body, which is located in the isolation cavity. The temperature of the reaction cavity of the inner vessel body is directly regulated by the cooling jacket. At the same time, the cooling jacket and the inner vessel body are isolated from the external environment by the isolation cavity and the outer vessel body, reducing heat exchange with the external environment, reducing temperature fluctuations during the synthesis reaction, and making the synthesis reaction in a stable low temperature environment, thereby improving product purity and product yield, while reducing the energy consumption required for temperature control and reducing synthesis production costs.

[0019] (2) An alkaline solution injection pump is installed at the alkaline solution injection port. The alkaline solution is injected into the reaction chamber by dripping a precise amount of alkaline solution to avoid large fluctuations in pH during the synthesis reaction. At the same time, a pH monitoring component is used to monitor and control the pH of the materials in the reaction chamber in real time during the synthesis reaction, so as to ensure that the pH is always within the optimal range during the synthesis reaction, thereby improving the reaction efficiency, the purity and yield of the synthesized product, and reducing the occurrence of side reactions and the content of by-products.

[0020] (3) A pre-cooling component is used at the cocoyl chloride dripping port to pre-cool the cocoyl chloride added to the reaction chamber, so as to avoid large temperature fluctuations in the reaction chamber caused by the large temperature difference between the cocoyl chloride and the low temperature environment in the reaction chamber during the dripping process, improve the stability of the low temperature environment during the reaction process, thereby promoting the uniform and thorough mixing of materials, ensuring the consistency of the reaction progress and the stability of product quality. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the reaction vessel used for the synthesis of cocoyl glycinate in this embodiment of the present invention;

[0022] Figure 2 This is another schematic diagram of the reaction vessel used for the synthesis of cocoyl glycinate in this embodiment of the present invention;

[0023] Figure 3 This is a partially cross-sectional schematic diagram of the reaction vessel used for the synthesis of cocoyl glycinate salt in an embodiment of this utility model.

[0024] Reference numerals: 1. Main body of the vessel; 11. Inner vessel body; 111. Reaction chamber; 12. Outer vessel body; 121. Isolation chamber; 13. Main feed port; 14. Alkali solution injection port; 15. Cocoyl chloride dripping port; 16. Temperature monitoring component; 17. pH monitoring component; 18. Pressure monitoring component; 19. Discharge port; 2. Cooling jacket; 21. First liquid inlet; 22. First liquid outlet; 3. Alkali solution injection pump; 4. Pre-cooling component; 41. Pre-cooling dripping pipe; 42. Pre-cooling coil; 421. Second liquid inlet; 422. Second liquid outlet; 43. Pre-cooling chamber; 5. Discharge valve; 6. Stirring component; 61. Stirring motor; 62. Stirring shaft; 63. Stirring paddle; 631. Paddle blade. Detailed Implementation

[0025] To enable those skilled in the art to better understand this utility model, it will now be further described in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of this utility model.

[0026] Example:

[0027] like Figures 1-3 As shown, this utility model provides a reaction vessel for the synthesis of cocoyl glycinate, which includes a vessel body 1 with an inner vessel body 11 and an outer vessel body 12. The inner vessel body 11 is provided with a reaction chamber 111 for the synthesis of cocoyl glycinate. The outer vessel body 12 is sleeved on the outside of the inner vessel body 11, and the two form an isolation chamber 121. The inner vessel body 11 is provided with a cooling jacket 2 fixedly sleeved on its outer wall. The cooling jacket 2 is located in the isolation chamber 121. By setting the isolation chamber 121 located outside the inner vessel body 11, the heat exchange between the inner vessel body 11 and the external environment during the reaction is reduced, thereby avoiding large temperature fluctuations during the reaction and improving the stability and reliability of temperature control during the synthesis reaction of cocoyl glycinate.

[0028] Combination Figure 1 and Figure 3As shown, the cooling jacket 2 is provided with a first liquid inlet 21 and a first liquid outlet 22 connected thereto. Both the first liquid inlet 21 and the first liquid outlet 22 penetrate the side wall of the outer vessel body 12 and extend outward, so that the coolant can circulate within the cooling jacket 2 through an external circulating cooling device to achieve a cooling effect. Specifically, in this embodiment, the first liquid inlet 21 and the first liquid outlet 22 are connected to an external semiconductor refrigeration device through pipelines. The semiconductor refrigeration device circulates and exchanges heat with the coolant through a semiconductor refrigeration chip and a circulating pump. The cooling temperature range can reach 0-20℃, and the cooling temperature control accuracy can reach ±0.5℃. The coolant can be selected as an ethylene glycol aqueous solution with a volume ratio of 1:1. It should be noted that the above-mentioned semiconductor refrigeration device is only a preferred implementation scheme. Of course, other circulating cooling devices that can achieve the required low-temperature cooling effect can also be used. The circulating cooling device is not shown in the figure. Given that it is a mature prior art in this field, it will not be specifically limited or described in detail here.

[0029] like Figure 1 and Figure 3 As shown, the top of the reactor body 1 is provided with a main feed port 13, an alkali inlet 14, and a cocoyl chloride dropper 15, all connected to the reaction chamber 111. An alkali inlet pump 3 is installed at the alkali inlet 14. The alkali is injected into the reaction chamber 111 through an alkali storage container connected to the alkali inlet pump 3 to achieve pH adjustment during the synthesis reaction. The alkali can be a 30% NaOH solution or other alkaline solution. In addition, the alkali inlet pump 3 can be a fluid pump or a peristaltic pump to achieve precise quantitative addition of the alkali. Since fluid pumps or peristaltic pumps are mature existing technologies in this field, their specific structures and principles will not be described here.

[0030] Combination Figure 2 and Figure 3 As shown, a precooling component 4 is installed at the cocoyl chloride dripping port 15 to precool the cocoyl chloride dripped into the reaction chamber 111. The precooling component 4 includes a precooling dripping pipe 41 connected to the cocoyl chloride dripping port 15, a precooling coil 42 sleeved around the precooling dripping pipe 41, and a precooling box 43 fixedly installed on the top outer wall of the reactor body 1. The precooling dripping pipe 41 and the precooling coil 42 are fixedly installed inside the precooling box 43. The precooling dripping pipe 41 penetrates the top wall of the precooling box 43 and extends outwards, connecting to a cocoyl chloride storage container and a dripping pump (not shown in the figure). (See reference...) Figure 3As shown, the precooling coil 42 is equipped with a second liquid inlet 421 and a second liquid outlet 422. Both the second liquid inlet 421 and the second liquid outlet 422 penetrate the side wall of the precooling chamber 43 and extend outward. This allows the coolant to circulate within the precooling coil 42 via an external circulating cooling device, precooling the cocoyl chloride in the precooling dripping pipe 41. This precooling and regulating of the cocoyl chloride dripped into the reaction chamber 111 through the cocoyl chloride dripping port 15 improves the product yield and purity of the cocoyl glycinate synthesis reaction, and reduces the content of side reactions (such as amidation) and byproducts (such as sodium chloride). It should be noted that the cocoyl chloride storage container and dripping pump connected to the precooling dripping pipe 41, as well as the circulating cooling device connected to the precooling coil 42, are not shown in the figure. Given that these are mature existing technologies in the field and are not improvements to the technical solution of this application, they will not be described in detail here.

[0031] refer to Figure 3 As shown, the bottom of the reactor body 1 is provided with a discharge port 19 that communicates with the reaction chamber 111, and a discharge valve 5 is provided at the discharge port 19. The discharge valve 5 can be a pneumatic butterfly valve or other valve structures. Given that it is a mature existing technology in this field, its specific structure and principle will not be described here.

[0032] like Figure 1 and Figure 2As shown, the reactor body 1 is also equipped with a temperature monitoring component 16, a pH monitoring component 17, and a pressure monitoring component 18, which are fixedly connected thereto. The temperature monitoring component 16, pH monitoring component 17, and pressure monitoring component 18 all penetrate the reactor walls of the inner reactor body 11 and the outer reactor body 12 and extend into the reaction chamber 111 to monitor the temperature, pH, and pressure parameters during the synthesis reaction process in real time. Furthermore, the temperature monitoring component 16, pH monitoring component 17, and pressure monitoring component 18 are all equipped with connection interfaces to an external PLC controller for the transmission and feedback of relevant parameter data. Specifically, in this embodiment, the pH monitoring component 17 includes a low-temperature resistant pH electrode that penetrates the top wall of the reactor body 1 and extends into the reaction chamber 111. For example, a Mettler T-type low-temperature resistant pH electrode or other pH measurement sensors can be used. The pH electrode is covered with an anti-crystallization sleeve, which can be a polytetrafluoroethylene (PTFE) supported sleeve. The temperature monitoring component 16 includes a temperature sensor that penetrates the side wall of the reactor body 1 and extends into the reaction chamber 111. The pressure monitoring component 18 includes a pressure sensor that penetrates the top wall of the reactor body 1 and extends into the reaction chamber 111. It should be noted that, given that the pH electrode, temperature sensor, and pressure sensor are all mature existing technologies in the field, their structures and principles will not be described in detail here. Furthermore, the temperature sensor of the temperature monitoring component 16, the pH electrode of the pH monitoring component 17, and the pressure sensor of the pressure monitoring component 18 are all connected to an external PLC controller to monitor relevant parameters in the synthesis reaction process in real time. Simultaneously, the aforementioned alkali injection pump 3 is also connected to an external PLC controller to achieve real-time monitoring and adjustment of the pH during the synthesis reaction process, forming a real-time closed-loop feedback pH adjustment.

[0033] refer to Figure 3 As shown, the reactor body 1 is also provided with a stirring assembly 6 fixedly connected thereto. The stirring assembly 6 includes a stirring motor 61 fixedly mounted on the top of the reactor body 1, a stirring shaft 62 connected to the output shaft of the stirring motor 61 via a coupling, and at least one stirring paddle 63 mounted on the stirring shaft 62. The stirring paddle 63 is arranged near the end of the stirring shaft 62. Further, several stirring paddles 63 are provided and are arranged at intervals along the axial direction of the stirring shaft 62. Specifically, in this embodiment, three stirring paddles 63 are provided and are all arranged near the bottom end of the stirring shaft 62. The stirring paddle 63 is provided with several blades 631 evenly spaced along the circumferential direction with the axis of the stirring shaft 62 as the center. The blades 631 are provided with several through holes to improve the stirring effect, thereby promoting the activation of the mixing reaction between raw materials and materials in the synthesis reaction.

[0034] The following describes the use of the reaction vessel for the synthesis of cocoyl glycinate salt provided in this embodiment, specifically in conjunction with the low-temperature synthesis of potassium cocoyl glycinate and sodium cocoyl glycinate:

[0035] (1) Low-temperature synthesis of potassium cocoyl glycinate

[0036] Step 1: Add potassium glycine aqueous solution (concentration 30wt%) into reaction chamber 111 through main feed port 13, start stirring assembly 6, stirring motor 61 runs at 60rpm, which drives stirring paddle 63 to rotate through stirring shaft 62 to promote uniform mixing of materials.

[0037] Step 2: The pH monitoring component 17 monitors the pH value in the reaction chamber 111 in real time. When the pH value is lower than 8.5, the PLC controller starts the alkali injection pump 3 and adds 30% NaOH solution to the reaction chamber 111 through the alkali injection port 14 to maintain the pH in the range of 8.5 to 9.0.

[0038] Step 3: Cocoyl chloride is cooled to 5°C through the pre-cooling dripping pipe 41 and the pre-cooling coil 42, and then slowly dripped into the reaction chamber 111 through the coconut chloride dripping port 15. The dripping rate is controlled at 0.5 L / min, and the reaction time is 2 hours.

[0039] Step 4: During the reaction, adjust the stirring motor 61 to run at 120 rpm to prevent material sedimentation at low temperature.

[0040] Step 5: After the reaction is complete, open the discharge valve 5 and discharge the product through the discharge port 19. Then clean the inner wall of the reaction chamber 111 of the inner vessel 11 and discharge the cleaning wastewater through the discharge port 19.

[0041] (2) Low-temperature synthesis of sodium cocoyl glycinate

[0042] Step 1: Add sodium glycinate aqueous solution (concentration 25wt%) into reaction chamber 111 through main feed port 13, start stirring assembly 6, stirring motor 61 runs at 60rpm, which drives stirring paddle 63 to rotate through stirring shaft 62 to promote uniform mixing of materials.

[0043] Step 2: The pH monitoring component 17 monitors the pH value in the reaction chamber 111 in real time. When the pH value is lower than 8.5, the PLC controller starts the alkali injection pump 3 and adds 30% NaOH solution to the reaction chamber 111 through the alkali injection port 14 to maintain the pH in the range of 8.5 to 9.0.

[0044] Step 3: Cocoyl chloride is cooled to 8°C through the pre-cooling dripping pipe 41 and the pre-cooling coil 42, and then slowly dripped into the reaction chamber 111 through the coconut chloride dripping port 15. The dripping rate is controlled at 0.5 L / min, and the reaction time is 2 hours.

[0045] Step 4: During the reaction, adjust the stirring motor 61 to run at 120 rpm to prevent material sedimentation at low temperatures, and simultaneously adjust the pH in stages:

[0046] Phase 1 (0~30min): pH is set to 9.0, and the alkaline solution pump 3 automatically replenishes NaOH solution to ensure full activation in the initial stage of the reaction;

[0047] Phase 2 (30-90 min): pH is set to 8.7 to prevent side reactions (such as amidation);

[0048] Stage 3 (90~120 min): pH is set to 8.5 to improve product yield.

[0049] Step 5: After the reaction is complete, open the discharge valve 5 and discharge the product through the discharge port 19. Then clean the inner wall of the reaction chamber 111 of the inner vessel 11 and discharge the cleaning wastewater through the discharge port 19.

[0050] In summary, the reaction vessel for synthesizing cocoyl glycinate provided by this utility model injects alkali solution through an alkali inlet and an alkali inlet pump to regulate the pH during the synthesis reaction. At the same time, the cooling jacket and the pre-cooling component set at the cocoyl chloride droplet are used to control the temperature, ensuring that the synthesis reaction is carried out in a low-temperature environment, thereby improving the synthesis reaction efficiency, product purity, and product yield.

[0051] The above are merely preferred embodiments of the present utility model and do not limit the patent scope of the present utility model. All equivalent changes and modifications made within the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A reaction vessel for the synthesis of cocoyl glycinate, characterized in that: The vessel body (1) includes an inner vessel body (11) and an outer vessel body (12). The inner vessel body (11) is provided with a reaction chamber (111). The outer vessel body (12) is sleeved on the outside of the inner vessel body (11) and an isolation chamber (121) is formed between the two. The inner vessel body (11) is provided with a cooling jacket (2) fixedly sleeved on its outer side wall. The cooling jacket (2) is located inside the isolation chamber (121). The top of the reactor body (1) is provided with a main feed port (13), an alkali injection port (14), and a cocoyl chloride dripping port (15) connected to the reaction chamber (111). An alkali injection pump (3) is provided at the alkali injection port (14), and a pre-cooling component (4) is provided at the cocoyl chloride dripping port (15) to pre-cool the cocoyl chloride dripped into the reaction chamber (111).

2. The reaction vessel for synthesizing cocoyl glycinate according to claim 1, characterized in that: The precooling component (4) includes a precooling dripping pipe (41) connected to the cocoyl chloride dripping port (15), a precooling coil (42) sleeved on the outer periphery of the precooling dripping pipe (41), and a precooling box (43) fixedly installed on the top of the reactor body (1). The precooling dripping pipe (41) and the precooling coil (42) are both fixedly installed inside the precooling box (43). The precooling dripping pipe (41) passes through the precooling box (43) and extends outward.

3. The reaction vessel for synthesizing cocoyl glycinate according to claim 2, characterized in that: The cooling jacket (2) is provided with a first liquid inlet (21) and a first liquid outlet (22) connected thereto. The first liquid inlet (21) and the first liquid outlet (22) both penetrate the side wall of the outer vessel body (12) and extend outward. The precooling coil (42) is provided with a second liquid inlet (421) and a second liquid outlet (422). The second liquid inlet (421) and the second liquid outlet (422) both penetrate the side wall of the precooling box (43) and extend outward.

4. The reaction vessel for synthesizing cocoyl glycinate according to claim 1, characterized in that: The reactor body (1) is also provided with a temperature monitoring component (16), a pH monitoring component (17), and a pressure monitoring component (18) fixedly connected thereto. The temperature monitoring component (16), the pH monitoring component (17), and the pressure monitoring component (18) all penetrate the reactor walls of the inner reactor body (11) and the outer reactor body (12) and extend into the reaction chamber (111) to monitor the temperature, pH and pressure parameters in real time during the synthesis reaction process.

5. The reaction vessel for synthesizing cocoyl glycinate according to claim 1, characterized in that: The bottom of the reactor body (1) is provided with a discharge port (19) connected to the reaction chamber (111) and a discharge valve (5) located at the discharge port (19).

6. The reaction vessel for synthesizing cocoyl glycinate according to claim 1, characterized in that: The vessel body (1) is also provided with a stirring assembly (6) fixedly connected thereto. The stirring assembly (6) includes a stirring motor (61) fixedly installed on the top of the vessel body (1), a stirring shaft (62) connected to the stirring motor (61), and at least one stirring paddle (63) installed on the stirring shaft (62). The stirring paddle (63) is positioned near the end of the stirring shaft (62).

7. The reaction vessel for synthesizing cocoyl glycinate according to claim 6, characterized in that: The stirring paddle (63) is provided with a plurality of blades (631) evenly spaced along the circumferential direction with the axis of the stirring shaft (62) as the center, and the blades (631) are provided with a plurality of through holes.

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