High-quality and low-cost potassium cinnamate preparation device

Abstract

The utility model relates to the technical field of potassium cinnamate preparation, in particular to a high-quality low-cost potassium cinnamate preparation device which comprises a potassium alkoxide preparation kettle, a neutralization reaction kettle and a three-in-one filtering, washing and drying machine, a potassium hydroxide feeding port and an absolute ethyl alcohol feeding port are respectively formed in the top of the potassium alkoxide preparation kettle, and a discharging port is formed in the bottom of the potassium alkoxide preparation kettle; a cinnamic acid feeding port and an absolute ethyl alcohol feeding port are formed in the top of the neutralization reaction kettle, a solid-liquid mixture feeding port is formed in the top of the three-in-one filtering, washing and drying machine, an ethyl alcohol discharging port is formed in the bottom of the three-in-one filtering, washing and drying machine, and the potassium alcoholate preparation kettle and the neutralization reaction kettle are each provided with a refrigeration pipe. And the refrigeration pipes are respectively arranged in the potassium alkoxide preparation kettle and the neutralization reaction kettle. According to the utility model, the refrigeration pipe is arranged in the kettle, so that the ethanol solution of potassium hydroxide is subjected to homogeneous reaction under the normal temperature condition, and the reaction under the normal temperature condition avoids the problems of system yellowing and product blackening caused by high-temperature dissolution of cinnamic acid in a water phase in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of potassium cinnamate preparation, in particular to a high-quality and low-cost potassium cinnamate preparation device. Background Art

[0002] Potassium cinnamate, also known as potassium 3-phenyl-2-acrylate or potassium phenylacrylate, is a white crystalline powder that is easily soluble in water and slightly soluble in ethanol. It has a natural cinnamon aroma. It is a new natural food preservative widely used in medicine, agriculture, and food.

[0003] Potassium cinnamate, the potassium salt of natural cinnamic acid, is a new product currently being developed in the food preservative field. It is non-toxic, safe, and convenient, and has great development and application prospects. After the preservative sodium benzoate was designated a carcinogen by the UK Food Safety Authority, its use has been banned in most countries. Potassium sorbate, a preservative alternative, cannot be incorporated into food and, even within limited usage limits, can still remain in the human body, posing a health hazard. Potassium cinnamate, on the other hand, is a natural plant-derived preservative. After absorption by the human body, it is converted into phenylalanine and metabolized and excreted. Small amounts of phenylalanine can be converted to tyrosine through phenylalanine hydroxylase, without any toxic side effects. Potassium cinnamate can be fully incorporated into food, without becoming a foreign substance. It achieves its preservation purpose by working within the food and in conjunction with the surrounding environment, without altering the food's original flavor or nutritional structure. At the same time, potassium cinnamate can be converted into essential amino acids for the human body after being ingested, providing the human body with the necessary trace element potassium, avoiding the occurrence of hypokalemia, improving the body's ability to resist fatigue, regulating body functions, and enhancing immunity.

[0004] Potassium cinnamate has a wide range of applications, including in the food, cosmetics, agriculture, and feed industries. Potassium cinnamate can be used in beverages to improve flavor and prevent spoilage. It is also commonly used in pickled vegetables, rice and flour products, and baked goods. Potassium cinnamate has strong and stable antibacterial properties, regardless of pH. It also promotes metabolism, reduces inflammation, and has antibacterial properties, aiding wound healing. It has a strong inhibitory effect on the mycelial growth, spore formation, and spore germination of three fungi: Penicillium italicum, Penicillium digitatum, and Colletotrichum gloeosporioides. Cinnamic acid, the active ingredient in the traditional Chinese medicine cinnamon, is more water-soluble than cinnamic acid and has been extensively studied in animal feed.

[0005] Currently, the production process for potassium cinnamate involves using cinnamic acid, potassium hydroxide, or potassium carbonate as raw materials. A neutralization reaction occurs in an aqueous system, followed by decolorization and impurity removal with activated carbon and spray drying to produce a solid potassium cinnamate product. This method is simple and widely used. However, due to the physical property of potassium cinnamate being poorly soluble in water, the system must be heated to boiling during the neutralization reaction to achieve a homogeneous reaction, increasing the solubility of cinnamic acid in water and promoting the full progress of the reaction. Prolonged high-temperature heating causes oxidation of the cinnamic acid, resulting in a yellowish color in the reaction system. After spray drying, the product has a dark appearance, affecting product quality. Furthermore, the water content of the neutralized potassium cinnamate solution is between 65% and 75%, resulting in high energy consumption for dehydration. The spray drying method employed typically has a thermal efficiency of only 30% to 50%, resulting in significant energy waste during the dehydration process, which directly contributes to the high production cost of potassium cinnamate. Utility Model Content

[0006] Aiming at the technical problem in the prior art that potassium cinnamate devices are heated at high temperatures for a long time, resulting in oxidation of potassium cinnamate and yellowing and darkening of products, the utility model provides a high-quality and low-cost potassium cinnamate preparation device, which adopts room temperature reaction and solves the problem in the prior art that the high-temperature dissolution of cinnamic acid produces yellowing of the system and darkening of the product.

[0007] The utility model provides a high-quality and low-cost potassium cinnamate preparation device, which comprises a potassium alcoholate preparation kettle, a neutralization reactor, and a three-in-one filtering, washing, and drying machine. The top of the potassium alcoholate preparation kettle is respectively provided with a potassium hydroxide feeding port and an anhydrous ethanol feeding port, and the bottom is provided with a discharge port. The top of the neutralization reactor is respectively provided with a cinnamic acid feeding port and an anhydrous ethanol feeding port, the discharge port of the potassium alcoholate preparation kettle is connected to the feed port of the neutralization reactor through a pipeline, the top of the three-in-one filtering, washing, and drying machine is provided with a solid-liquid mixture feeding port, the solid-liquid mixture feeding port of the three-in-one filtering, washing, and drying machine is connected to the discharge port of the neutralization reactor through a pipeline, the bottom of the three-in-one filtering, washing, and drying machine is provided with an ethanol discharge port, and the ethanol discharge port is connected to the anhydrous ethanol feed port through a recycled ethanol pipeline. The potassium alcoholate preparation kettle and the neutralization reactor are both provided with refrigeration pipes, and the refrigeration pipes are respectively installed on the inner walls of the potassium alcoholate preparation kettle and the neutralization reactor.

[0008] Furthermore, a stirrer and an online thermometer are respectively provided inside the potassium alcohol preparation kettle and the neutralization reaction kettle. The rapid stirring of the stirrer can quickly dissolve the solid potassium hydroxide and can also quickly fuse the mixed liquid.

[0009] Furthermore, the neutralization reactor includes an online pH meter, which determines the acidity or alkalinity of the solution by measuring the hydrogen ion concentration in the solution and controls the pH value in the neutralization reactor to be 8.0-8.5.

[0010] Furthermore, a potassium cinnamate discharge port is provided on the side of the three-in-one filter, washing and drying machine.

[0011] Furthermore, a pump and a regulating valve are installed on the pipeline connecting the potassium alcohol preparation kettle and the neutralization reactor. The pump is used to provide power for the flow of fluid in the pipeline, and the regulating valve is used to control the flow rate and pressure of the fluid in the pipeline.

[0012] Furthermore, a pump and a regulating valve are installed on the pipeline connecting the discharge port of the neutralization reactor and the three-in-one filter, washing and drying machine.

[0013] The beneficial effects of the present invention are:

[0014] (1) The utility model installs a refrigeration tube so that the ethanol solution of potassium hydroxide can achieve a homogeneous reaction at room temperature. The reaction temperature is low and the reaction time is short, thus avoiding the problem of yellowing of the system and darkening of the product caused by high-temperature dissolution of cinnamic acid in the aqueous phase in the prior art.

[0015] (2) The solid potassium cinnamate precipitated by the reaction of the utility model can be obtained as a finished potassium cinnamate product by a three-in-one filtering, washing and drying machine, which has obvious cost advantages. The existing technology adopts aqueous phase synthesis, and the product potassium cinnamate is easily soluble in water. It is necessary to remove 65-75% of the water to obtain a solid product, which requires a large amount of dehydration and high steam consumption.

[0016] (3) The utility model does not require the use of activated carbon for decolorization and no solid waste residue is generated.

[0017] (4) The ethanol solution as the solvent in the present invention can be recycled as mother liquor, which is in line with green chemical utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 This is a structural diagram of Example 1 of the specific implementation method of the present utility model.

[0020] In the figure, 1-potassium alcohol preparation kettle, 2-potassium hydroxide feeding port, 3-anhydrous ethanol feeding port 1, 4-online thermometer 1, 5-refrigeration tube 1, 6-agitator 1, 7-neutralization reactor, 8-cinnamic acid feeding port, 9-anhydrous ethanol feeding port 2, 10-online pH meter, 11-online thermometer 2, 12-three-in-one filter drying and washing machine, 13-solid-liquid mixture feeding port, 14-potassium cinnamate discharge port, 15-ethanol discharge port, 16-recycled ethanol pipeline, 17-refrigeration tube 2, 18-agitator 2. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0022] Example 1

[0023] The utility model discloses a high-quality and low-cost preparation device of potassium cinnamate, comprising a potassium alcoholate preparation kettle 1, a neutralization reaction kettle 7, and a three-in-one filtering, washing, and drying machine 12. The top of the potassium alcoholate preparation kettle 1 is respectively provided with a potassium hydroxide feeding port 2 and an anhydrous ethanol feeding port 1 3, and the bottom is provided with a discharge port. The top of the neutralization reaction kettle 7 is respectively provided with a cinnamic acid feeding port 8 and an anhydrous ethanol feeding port 2 9. An online pH meter 10 is installed inside the neutralization reaction kettle 7. An agitator 1 6 is provided inside the potassium alcoholate preparation kettle 1. An agitator 2 18 is provided inside the neutralization reaction kettle 7. The discharge port of the potassium alcoholate preparation kettle 1 is connected to the feed port of the neutralization reaction kettle 7 through a pipeline. A pump and a regulating valve are installed on the pipeline connecting the potassium alcoholate preparation kettle and the neutralization reaction kettle to control the flow of the fluid in the pipeline. An online thermometer 4 and an online thermometer 2 11 are respectively provided inside the reactor 7, a solid-liquid mixture feed port 13 is provided on the top of the three-in-one filter, washing and drying machine 12, the solid-liquid mixture feed port 13 is connected to the discharge port of the neutralization reactor 7 through a pipeline, a pump and a regulating valve are installed on the connecting pipeline, a potassium cinnamate discharge port 14 and an ethanol discharge port 15 are provided in the three-in-one filter, washing and drying machine 12, and the ethanol discharge port 15 is connected to the anhydrous ethanol feed port 2 9 through a recycled ethanol pipeline 16; a refrigeration pipe 5 and a refrigeration pipe 2 17 are respectively provided inside the potassium alcoholate preparation reactor 1 and the neutralization reactor 7, both of which are refrigeration coils, and the refrigeration pipe 5 is fixed on the inner wall of the potassium alcoholate preparation reactor 1, and the refrigeration pipe 2 17 is fixed on the inner wall of the neutralization reactor 7.

[0024] The specific workflow of this utility model is:

[0025] Solid potassium hydroxide is added into the potassium alcohol preparation kettle 1 through the potassium hydroxide feeding port 2, and then anhydrous ethanol is added into the potassium alcohol preparation kettle 1 through the anhydrous ethanol feeding port 3. The stirrer 6 and the circulating water are started to cool the solid potassium hydroxide and anhydrous ethanol in the kettle, and the temperature in the kettle is controlled at 30°C-45°C. The mixture is stirred until the solid potassium hydroxide is completely dissolved to form an ethanol solution of potassium hydroxide. The circulating water in the refrigeration pipe 5 on the inner wall of the potassium alcohol preparation kettle 1 cools the ethanol solution of potassium hydroxide. The online thermometer in the kettle is used to cool the ethanol solution of potassium hydroxide. 211 monitors the temperature in the kettle in real time and controls the temperature in the potassium alcoholate preparation kettle 1 to be 30°C-35°C; solid cinnamic acid is added to the neutralization reactor 7 through the cinnamic acid feeding port 8, and anhydrous ethanol is added to the neutralization reactor 7 through the anhydrous ethanol feeding port 29, and the stirrer 218 is started for stirring until the cinnamic acid is completely dissolved, and the ethanol solution of potassium hydroxide in the potassium alcoholate preparation kettle 1 is poured into the high-level tank, and then slowly dripped into the neutralization reactor 7 through the pump and regulating valve in the control pipeline for mixing. At this time, the neutralization reactor 7 The circulating water in the internal refrigeration pipe 17 cools the mixed liquid to control the reaction temperature at 30°C-35°C. The online thermometer 11 in the neutralization reactor 7 monitors the temperature in the reactor in real time to control the temperature in the reactor to 30-35°C. The online pH meter 10 monitors the pH value in the neutralization reactor 7 in real time to control the pH value in the reactor to 8.0-8.5. When the pH reaches 8.0-8.5, the pump and regulating valve in the control pipeline stop adding the ethanol solution of potassium hydroxide. At this time, the neutralization reactor 7 The finished liquid is a milky white solid-liquid mixture. The milky white solid-liquid mixture enters the solid-liquid mixture feed port 13 of the three-in-one filter, washing and drying machine 10 through the pipe connecting the discharge port of the neutralization reactor 7 for solid-liquid separation. The separated ethanol filtrate is used as the mother liquor and flows from the ethanol discharge port 15 through the ethanol recovery pipe 16 to the anhydrous ethanol feeding port 2 9 in the neutralization reactor 7 for recycling. At this point, the powdered solid precipitated from the three-in-one filter, washing and drying machine is output through the potassium cinnamate discharge port 14. The solid is the finished powdered potassium cinnamate product.

[0026] Although the present invention has been described in detail with reference to the accompanying drawings and in conjunction with preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, persons of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and such modifications or substitutions shall fall within the scope of the present invention. Any changes or substitutions that can be easily conceived by persons skilled in the art within the technical scope disclosed in the present invention shall fall within the scope of protection of the present invention.

Claims

1. A high-quality and low-cost potassium cinnamate preparation device, characterized in that: The invention comprises a potassium alcoholate preparation kettle, a neutralization reactor and a three-in-one filter, washing and drying machine; the top of the potassium alcoholate preparation kettle is respectively provided with a potassium hydroxide feeding port and an anhydrous ethanol feeding port, and the bottom is provided with a discharge port; the top of the neutralization reactor is respectively provided with a cinnamic acid feeding port and an anhydrous ethanol feeding port, the discharge port of the potassium alcoholate preparation kettle is connected to the anhydrous ethanol feeding port of the neutralization reactor through a pipeline, the top of the three-in-one filter, washing and drying machine is provided with a solid-liquid mixture feeding port, the solid-liquid mixture feeding port of the three-in-one filter, washing and drying machine is connected to the discharge port of the neutralization reactor through a pipeline, the bottom of the three-in-one filter, washing and drying machine is provided with an ethanol discharge port, and the ethanol discharge port is connected to the anhydrous ethanol feeding port through a recycled ethanol pipeline; the potassium alcoholate preparation kettle and the neutralization reactor are both provided with refrigeration pipes, and the refrigeration pipes are respectively installed on the inner walls of the potassium alcoholate preparation kettle and the neutralization reactor.

2. A high-quality and low-cost potassium cinnamate preparation device according to claim 1, characterized in that: A stirrer and an online thermometer are provided inside the potassium alcohol preparation kettle and the neutralization reaction kettle.

3. A high-quality and low-cost potassium cinnamate preparation device according to claim 1, characterized in that: An online pH meter is installed inside the neutralization reactor.

4. The high-quality and low-cost potassium cinnamate preparation device according to claim 1, characterized in that: A potassium cinnamate discharge port is provided on the side of the three-in-one filter, washing and drying machine.

5. The high-quality and low-cost potassium cinnamate preparation device according to claim 1, characterized in that: A pump and a regulating valve are installed on the pipeline connecting the potassium alcohol preparation kettle and the neutralization reaction kettle.

6. The high-quality and low-cost potassium cinnamate preparation device according to claim 1, characterized in that: A pump and a regulating valve are installed on the pipeline connecting the discharge port of the neutralization reactor and the three-in-one filter, washing and drying machine.

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