A chlorine dioxide solid preparation and its preparation method

Abstract

This invention discloses a chlorine dioxide solid preparation and its preparation method, belonging to the field of disinfectant technology. The preparation method of the chlorine dioxide solid preparation of this invention includes the following steps: S01, preparing an adsorption carrier using plant straw as raw material; S02, preparing a chlorine dioxide solution; S03, adsorption, to obtain the chlorine dioxide solid preparation. The preparation method of the chlorine dioxide solid preparation of this invention uses plant straw as raw material to prepare an organic carrier, resulting in a chlorine dioxide solid preparation with good sustained-release performance. It also utilizes waste biomass resources and can be recycled and reused after use.

Description

Technical Field

[0001] This invention belongs to the field of disinfectant technology, and in particular relates to a chlorine dioxide solid preparation and its preparation method. Background Technology

[0002] Chlorine dioxide is internationally recognized as a safe, non-toxic, and highly effective green disinfectant of the fourth generation, with extremely wide applications. However, due to its gaseous nature, chlorine dioxide is relatively difficult to obtain and store, leading to the development of slow-release chlorine dioxide products that can generate chlorine dioxide gas over extended periods.

[0003] CN112495338A discloses an adsorbent and its preparation method, a chlorine dioxide preparation and its preparation method and application, which uses diatomaceous earth, kaolin and bentonite as raw materials to prepare a composite carrier as an adsorbent, and the carrier used is an inorganic non-recyclable resource. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a solid chlorine dioxide formulation using an organic carrier and its preparation method. The carrier is prepared using plant straw as raw material, exhibiting good slow-release performance. It also utilizes waste biomass resources and can be recycled and reused as biomass after use.

[0005] The first aspect of this invention discloses a method for preparing a solid chlorine dioxide formulation, comprising the following steps:

[0006] S01, an adsorption carrier prepared from plant straw as raw material;

[0007] SO2 is used to prepare a chlorine dioxide solution.

[0008] SO3 is adsorbed to obtain the chlorine dioxide solid preparation.

[0009] In some embodiments of the present invention, in S01, the plant straw is one or more of corn straw, wheat straw and rice straw.

[0010] In some embodiments of the present invention, step S01 includes a step of treating the plant straw with an alkaline solution, wherein the alkaline solution preferably includes sodium hydroxide and urea.

[0011] In some embodiments of the present invention, step S01 further includes a step of treating the alkaline-treated plant straw with an oxidative modification solution, wherein the oxidative modification solution preferably includes styrene, acrylic acid, and hydrogen peroxide.

[0012] In some embodiments of the present invention, in S01, during the alkaline treatment, the weight ratio of the plant straw to the alkaline solution is 1:(10-50), the treatment is carried out at room temperature for 3-30 minutes, and the mass percentage concentration of sodium hydroxide and urea in the alkaline solution is 5-15%.

[0013] Preferably, the weight ratio of the plant straw to the alkaline solution is 1:(15-25), the treatment is carried out at room temperature for 8-15 minutes, and the mass percentage concentration of sodium hydroxide and urea in the alkaline solution is 8-12%.

[0014] In some embodiments of the present invention, in S01, during the oxidation modification solution treatment, the weight ratio of the plant straw to the oxidation modification solution is 1:(8-15), the treatment is carried out at 55-65℃ for 2-24 hours, and the mass percentage concentrations of styrene, acrylic acid and hydrogen peroxide in the oxidation modification solution are 8-12%, 0.5-1.5% and 1-10%, respectively.

[0015] Preferably, the weight ratio of the plant straw to the oxidation modification solution is 1:(8-15), and the treatment is carried out at 55-65℃ for 8-12 hours. In the oxidation modification solution, the mass percentage concentrations of styrene, acrylic acid, and hydrogen peroxide are 8-12%, 0.5-1.5%, and 4-6%, respectively.

[0016] In some embodiments of the present invention, in S02, the raw materials for preparing the chlorine dioxide solution are sodium chlorite, sodium percarbonate and hydrogen peroxide, preferably in a weight ratio of (5-15):(1-3):(1-3), and the pH is 9-10.

[0017] In some embodiments of the present invention, in step S03, the adsorbent carrier is mixed with a chlorine dioxide solution and dried to obtain the chlorine dioxide solid preparation.

[0018] In some embodiments of the present invention, the adsorbent carrier and chlorine dioxide solution are mixed by a mixing device. The mixing device includes a storage tank, a mixing tank, and a placement plate. The storage tank stores chlorine dioxide solution. A mounting frame is provided on the storage tank. A mounting plate is provided on the upper end of the mounting frame. An electric push rod is provided on the lower surface of the mounting plate. A mixing tank is provided at the lower end of the electric push rod. A plurality of liquid inlet holes are provided on the outer wall of the mixing tank. A placement plate is provided at the bottom of the mixing tank. The placement plate is detachably connected to the bottom of the mixing tank. A plurality of liquid drain holes are provided inside the placement plate.

[0019] In some embodiments of the present invention, a waterproof motor is provided at the center of the top wall inside the placement plate, a screw is provided at the output end of the waterproof motor, a pressure plate is provided on the screw, the center of the pressure plate is threadedly connected to the screw through a threaded hole, a plurality of sliding holes are provided inside the pressure plate, one end of the sliding hole extends to the screw, the other end of the sliding hole penetrates through the side wall of the pressure plate, a sliding rod is slidably provided inside the sliding hole, a limiting hole is provided on the outer wall of the screw, one end of the sliding rod is adapted to the limiting hole, a plurality of vertical sliding grooves are provided on the inner wall of the mixing box, the end of the sliding rod away from the limiting hole is adapted to the inner wall of the sliding groove, a guide groove is provided inside the pressure plate, the guide groove is connected to the sliding hole, a guide block is slidably provided inside the guide groove, the lower end of the guide block is fixedly connected to the upper end of the sliding rod, the guide block is made of magnetic material, an electromagnetic block is provided at one end of the guide groove, a first spring is provided at the end of the guide block away from the electromagnetic block, and the end of the first spring away from the guide block is fixedly connected to the inner wall of the guide groove.

[0020] The beneficial effects of this invention are:

[0021] The method for preparing chlorine dioxide solid formulation of the present invention uses plant straw as raw material to prepare an organic carrier, and the resulting chlorine dioxide solid formulation has good sustained-release performance. At the same time, it utilizes waste biomass resources, and can also be recycled and reused as biomass after use.

[0022] In the study of the preparation method of the chlorine dioxide solid formulation of the present invention, the significant effects of alkaline solution and oxidative modification solution treatment on the sustained-release performance were discovered. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0024] Figure 1 This is a schematic diagram of one state of the mixing device in this invention;

[0025] Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle;

[0026] Figure 3 This is a schematic diagram of another state of the mixing device in this invention;

[0027] Figure 4 For the present invention Figure 3 Enlarged view at point B in the middle;

[0028] Figure 5 This is a schematic diagram of the stirring device in this invention.

[0029] In the diagram: 1. Storage tank; 2. Mixing tank; 3. Placement plate; 4. Mounting bracket; 5. Mounting plate; 6. Electric push rod; 7. Liquid inlet; 8. Liquid outlet; 9. Waterproof motor; 10. Screw; 11. Pressure plate; 12. Sliding hole; 13. Sliding rod; 14. Limiting hole; 15. Slide groove; 16. Guide groove; 17. Guide block; 18. Electromagnetic block; 19. First spring; 20. Mounting cavity; 21. Guide rod; 22. Fixing block; 23. Sliding block; 24. Second spring; 25. Stirring plate; 26. First connecting rod; 27. Second connecting rod; 28. Mixing tank; 29. ​​Paddle mixer. Detailed Implementation

[0030] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0031] Unless otherwise specified, the examples and comparative examples are parallel experiments with the same components, component contents, preparation steps, and preparation parameters. The hydrogen peroxide mentioned is 30% hydrogen peroxide.

[0032] Example 1

[0033] A method for preparing a chlorine dioxide solid preparation

[0034] (1) Preparation of adsorption carrier: Corn stalks are crushed, passed through a 200-mesh sieve, dried at 60°C for 12 hours, mixed with 20 times the weight of alkaline solution, stirred at room temperature for 10 minutes, filtered, washed with water until neutral, mixed with 10 times the weight of oxidative modification solution, stirred at 60°C for 12 hours, filtered, washed with water until neutral, and carbonized at 120°C under nitrogen atmosphere for 4 hours to obtain the adsorption carrier.

[0035] In the alkaline solution, the concentrations of sodium hydroxide and urea are both 10%. In the oxidative modification solution, the concentrations of styrene, acrylic acid, and hydrogen peroxide are 10%, 1%, and 5%, respectively. All figures are by mass percentage.

[0036] (2) Prepare chlorine dioxide solution: Prepare a chlorine dioxide solution with a mass percentage of 10% sodium chlorite, 2% sodium percarbonate, and 2% hydrogen peroxide, and a pH value of 9.5.

[0037] (3) Adsorption

[0038] The adsorbent carrier and chlorine dioxide solution were mixed evenly at a ratio of 80g adsorbent carrier to 100mL chlorine dioxide solution, and then air-dried at room temperature to obtain the chlorine dioxide solid preparation.

[0039] Example 2

[0040] A method for preparing a chlorine dioxide solid preparation

[0041] (1) Preparation of adsorption carrier: Wheat straw is crushed, passed through a 100-mesh sieve, dried at 60°C for 8 hours, mixed with 15 times the weight of alkaline solution, stirred at room temperature for 15 minutes, filtered, washed with water until neutral, mixed with 8 times the weight of oxidative modification solution, stirred at 60°C for 10 hours, filtered, washed with water until neutral, and carbonized at 110°C under nitrogen atmosphere for 6 hours to obtain the adsorption carrier.

[0042] In the alkaline solution, the concentrations of sodium hydroxide and urea are both 10%. In the oxidative modification solution, the concentrations of styrene, acrylic acid, and hydrogen peroxide are 10%, 1%, and 5%, respectively. All figures are by mass percentage.

[0043] (2) Prepare chlorine dioxide solution: Prepare a chlorine dioxide solution with a mass percentage of 10% sodium chlorite, 2% sodium percarbonate, and 2% hydrogen peroxide, and a pH value of 9.5.

[0044] (3) Adsorption

[0045] The adsorbent carrier and chlorine dioxide solution were mixed evenly at a ratio of 80g adsorbent carrier to 100mL chlorine dioxide solution, and then air-dried at room temperature to obtain the chlorine dioxide solid preparation.

[0046] Example 3

[0047] A method for preparing a chlorine dioxide solid preparation

[0048] (1) Preparation of adsorption carrier: Rice straw is crushed, passed through a 200-mesh sieve, dried at 60°C for 12 hours, mixed with 25 times the weight of alkaline solution, stirred at room temperature for 8 minutes, filtered, washed with water until neutral, mixed with 15 times the weight of oxidative modification solution, stirred at 60°C for 8 hours, filtered, washed with water until neutral, and carbonized at 140°C under nitrogen atmosphere for 2 hours to obtain the adsorption carrier.

[0049] In the alkaline solution, the concentrations of sodium hydroxide and urea are both 10%. In the oxidative modification solution, the concentrations of styrene, acrylic acid, and hydrogen peroxide are 10%, 1%, and 5%, respectively. All figures are by mass percentage.

[0050] (2) Prepare chlorine dioxide solution: Prepare a chlorine dioxide solution with a mass percentage of 10% sodium chlorite, 2% sodium percarbonate, and 2% hydrogen peroxide, and a pH value of 9.5.

[0051] (3) Adsorption

[0052] The adsorbent carrier and chlorine dioxide solution were mixed evenly at a ratio of 80g adsorbent carrier to 100mL chlorine dioxide solution, and then air-dried at room temperature to obtain the chlorine dioxide solid preparation.

[0053] Example 4

[0054] A method for preparing a chlorine dioxide solid preparation

[0055] (1) Preparation of adsorption carrier: Corn stalks were crushed, passed through a 200-mesh sieve, dried at 60°C for 12 hours, mixed with 50 times the weight of alkaline solution, stirred at room temperature for 30 minutes, filtered, washed with water until neutral, mixed with 10 times the weight of oxidative modification solution, stirred at 60°C for 2 hours, filtered, washed with water until neutral, and carbonized at 120°C under nitrogen atmosphere for 4 hours to obtain the adsorption carrier.

[0056] In the alkaline solution, the concentrations of sodium hydroxide and urea are both 10%. In the oxidative modification solution, the concentrations of styrene, acrylic acid, and hydrogen peroxide are 10%, 1%, and 5%, respectively. All figures are by mass percentage.

[0057] (2) Prepare chlorine dioxide solution: Prepare a chlorine dioxide solution with a mass percentage of 10% sodium chlorite, 2% sodium percarbonate, and 2% hydrogen peroxide, and a pH value of 9.5.

[0058] (3) Adsorption

[0059] The adsorbent carrier and chlorine dioxide solution were mixed evenly at a ratio of 80g adsorbent carrier to 100mL chlorine dioxide solution, and then air-dried at room temperature to obtain the chlorine dioxide solid preparation.

[0060] Example 5

[0061] A method for preparing a chlorine dioxide solid preparation

[0062] (1) Preparation of adsorption carrier: Corn stalks are crushed, passed through a 200-mesh sieve, dried at 60°C for 12 hours, mixed with 10 times the weight of alkaline solution, stirred at room temperature for 3 minutes, filtered, washed with water until neutral, mixed with 10 times the weight of oxidative modification solution, stirred at 60°C for 24 hours, filtered, washed with water until neutral, and carbonized at 120°C under nitrogen atmosphere for 4 hours to obtain the adsorption carrier.

[0063] In the alkaline solution, the concentrations of sodium hydroxide and urea are both 10%. In the oxidative modification solution, the concentrations of styrene, acrylic acid, and hydrogen peroxide are 10%, 1%, and 5%, respectively. All figures are by mass percentage.

[0064] (2) Prepare chlorine dioxide solution: Prepare a chlorine dioxide solution with a mass percentage of 10% sodium chlorite, 2% sodium percarbonate, and 2% hydrogen peroxide, and a pH value of 9.5.

[0065] (3) Adsorption

[0066] The adsorbent carrier and chlorine dioxide solution were mixed evenly at a ratio of 80g adsorbent carrier to 100mL chlorine dioxide solution, and then air-dried at room temperature to obtain the chlorine dioxide solid preparation.

[0067] Example 6

[0068] A method for preparing a solid chlorine dioxide formulation differs from Example 1 in that, as follows: Figures 1-4 As shown, the adsorbent carrier is mixed with chlorine dioxide solution by a mixing device. The mixing device includes a storage tank 1, a mixing tank 2, and a placement plate 3. The storage tank 1 stores chlorine dioxide solution. A mounting frame 4 is installed on the storage tank 1. A mounting plate 5 is installed on the upper end of the mounting frame 4. An electric push rod 6 is installed on the lower surface of the mounting plate 5. The mixing tank 2 is installed at the lower end of the electric push rod 6. Several liquid inlet holes 7 are provided on the outer wall of the mixing tank 2. The placement plate 3 is installed at the bottom of the mixing tank 2. The placement plate 3 is detachably connected to the bottom of the mixing tank 2. Several drain holes 8 are provided inside the placement plate 3.

[0069] The working principle and beneficial effects of the above technical solution are as follows: A flange is provided on the outer periphery of the placement plate 3, and an internal thread is provided on the inner side of the flange. An external thread is provided on the outer wall of the mixing tank 2. The placement plate 3 is threadedly connected to the lower end of the mixing tank 2. When the adsorbent carrier is mixed with the chlorine dioxide solution, the placement plate 3 is first separated from the bottom of the mixing tank 2. Then, the adsorbent carrier is placed on the placement plate 3. Next, the placement plate 3 containing the adsorbent carrier is installed at the bottom of the mixing tank 2. The electric push rod 6 is activated, causing it to extend and drive the mixing tank 2 into the storage tank 1. The storage tank 1 contains chlorine dioxide solution, which enters the mixing tank 2 through the inlet hole 7 and the outlet hole 8. The adsorbent carrier can then react with the chlorine dioxide solution in the mixing tank 2. The chlorine solution is mixed in a mixing tank 2, which restricts the diffusion of the adsorbent carrier and prevents it from floating on the surface of the chlorine dioxide solution, resulting in uneven adsorption and improving the mixing effect. After a preset mixing time, the electric push rod 6 retracts, separating the mixing tank 2 from the chlorine dioxide solution. All the adsorbent carrier falls onto the placement plate 3 and is not lost in the storage tank 1, thus avoiding waste. Excess liquid on the adsorbent carrier can be drained into the storage tank 1 through the drain hole 8 of the placement plate 3. This reduces waste of chlorine dioxide solution and facilitates its reuse. It also drains the adsorbent carrier on the placement plate 3, reducing the liquid on the surface of the adsorbent carrier and facilitating subsequent drying, thereby improving preparation efficiency.

[0070] Example 7

[0071] Based on Example 6, such as Figures 1-4As shown, a waterproof motor 9 is installed at the center of the top wall inside the placement plate 3. A screw 10 is installed at the output end of the waterproof motor 9. A pressure plate 11 is installed on the screw 10. The center of the pressure plate 11 is threadedly connected to the screw 10 through a threaded hole. Several sliding holes 12 are provided inside the pressure plate 11. One end of the sliding hole 12 extends to the screw 10, and the other end of the sliding hole 12 penetrates the side wall of the pressure plate 11. A sliding rod 13 is slidably installed inside the sliding hole 12. A limiting hole 14 is provided on the outer wall of the screw 10. One end of the sliding rod 13 is adapted to the limiting hole 14. Several sliding holes 14 are provided on the inner wall of the mixing box 2. A vertical sliding groove 15 is provided. The end of the sliding rod 13 away from the limiting hole 14 is adapted to the inner wall of the sliding groove 15. A guide groove 16 is provided in the pressure plate 11. The guide groove 16 is connected to the sliding hole 12. A guide block 17 is slidably provided in the guide groove 16. The lower end of the guide block 17 is fixedly connected to the upper end of the sliding rod 13. The guide block 17 is made of magnetic material. An electromagnetic block 18 is provided at one end of the guide groove 16. A first spring 19 is provided at the end of the guide block 17 away from the electromagnetic block 18. The end of the first spring 19 away from the guide block 17 is fixedly connected to the inner wall of the guide groove 16.

[0072] The working principle and beneficial effects of the above technical solution are as follows: When the mixing tank 2 is immersed in the chlorine dioxide solution in the storage tank 1, the waterproof motor 9 and the electromagnetic block 18 are started. The electromagnetic block 18 is made of electromagnet. When the electromagnetic block 18 is working, it can generate magnetic attraction to the guide block 17, causing the guide block 17 to move towards the screw 10. The guide block 17 drives the sliding rod 13 to move towards the screw 10, so that one end of the sliding rod 13 is inserted into the limiting hole 14. At this time, the rotation of the waterproof motor 9 can drive the screw 10 to rotate. The rotation of the screw 10 can drive the pressure plate 11 to rotate. The rotation of the pressure plate 11 can stir the chlorine dioxide solution and the adsorbent carrier in the mixing tank 2, so that the adsorbent carrier and the chlorine dioxide solution are mixed more evenly, preventing the adsorbent carrier from sticking together and failing to fully absorb the solution. After the mixture is evenly mixed, the mixing tank 2 and the storage tank 1 are ready to be fully absorbed. After the chlorine dioxide solution is separated, the electromagnetic block 18 is turned off. Under the action of the first spring 19, the guide block 17 moves away from the screw 10, and the guide block 17 separates from the electromagnetic block 18. The guide block 17 drives the sliding rod 13 to move towards the slide groove 15 until one end of the sliding rod 13 extends into the slide groove 15. At this time, the waterproof motor 9 drives the screw 10 to rotate. The screw 10 drives the pressure plate 11 to move downward through the threaded transmission. The sliding rod 13 slides downward along the slide groove 15 until the pressure plate 11 contacts the adsorbent carrier on the placement plate 3. Under the downward pressure of the pressure plate 11, the liquid on the adsorbent carrier can be quickly drained, which can accelerate the drying speed of the adsorbent carrier, improve the preparation efficiency of chlorine dioxide solid preparation, and save costs. At the same time, the pressure plate 11 can crush the adsorbent carrier more finely, which is conducive to the recycling of the adsorbent carrier.

[0073] Example 8

[0074] Based on Example 7, such as Figures 1-4As shown, an installation cavity 20 is provided below the sliding hole 12. The lower end of the installation cavity 20 communicates with the interior of the mixing box 2. A guide rod 21 is provided inside the installation cavity 20. Both ends of the guide rod 21 are fixedly connected to the left and right side walls of the installation cavity 20. A fixing block 22 is provided at the end of the guide rod 21 near the screw 10, and a sliding block 23 is provided at the end of the guide rod 21 away from the screw 10. The sliding block 23 slides along the axial direction of the guide rod 21. A second spring 24 is provided on the side of the sliding block 23 away from the fixing block 22. The second spring 24 is sleeved on the guide rod 21. The second spring 24 is fixedly connected to the inner wall of the mounting cavity 20 at one end away from the sliding block 23. A stirring plate 25 is provided in the mounting cavity 20. A first connecting rod 26 is provided between the stirring plate 25 and the fixed block 22. One end of the first connecting rod 26 is hinged to the side wall of the fixed block 22, and the other end is hinged to the upper surface of the stirring plate 25. A second connecting rod 27 is provided between the stirring plate 25 and the sliding block 23. One end of the second connecting rod 27 is hinged to the side wall of the sliding block 23, and the other end is hinged to the upper surface of the stirring plate 25.

[0075] The working principle and beneficial effects of the above technical solution are as follows: When the pressure plate 11 stirs the chlorine dioxide solution and the adsorbent carrier, the stirring plate 25 can also stir the adsorbent carrier and chlorine dioxide solution in the mixing tank 2, which improves the mixing efficiency and uniformity of the adsorbent carrier and the chlorine dioxide solution. As the speed of the screw 10 increases, the sliding block 23 can slide away from the fixed block 22 along the guide rod 21. The sliding block 23 drives the stirring plate 25 to move through the second connecting rod 27, thereby changing the stirring position of the stirring plate 25 and realizing multi-directional stirring, which further improves the mixing efficiency. When the pressure plate 11 is pressed down, the stirring plate 25 can retract into the mounting cavity 20 and press down on the adsorbent carrier on the placement plate 3 along with the pressure plate 11, which improves the drainage effect, reduces the liquid attached to the adsorbent carrier, and facilitates the rapid drying of the adsorbent carrier.

[0076] Example 9

[0077] Based on Example 8, such as Figure 5 As shown, in step S02, a chlorine dioxide solution is prepared using a stirring device. The stirring device includes a stirring tank 28, a paddle stirrer 29 mounted on the stirring tank 28, and a control component. A hydrometer is installed inside the stirring tank 28 to detect the density of the liquid inside the stirring tank 28. The control component is electrically connected to the paddle stirrer 29 and the hydrometer. The control component controls the operation of the paddle stirrer 29 based on the hydrometer's detection value, including the following steps:

[0078] Step 1: Based on the density meter readings, calculate the target output power of the motor of the paddle mixer 29 using the following formula:

[0079]

[0080] Where Q1 is the target output power of the motor of the paddle mixer 29, ρ1 is the liquid density in the mixing tank 28 as detected by the hydrometer, n is the preset rotational speed of the mixing shaft of the paddle mixer 29, π is pi (π = 3.14), d is the inner diameter of the mixing tank 28, X is the number of paddles, N is the number of layers of paddles, a is the width of the paddle, and r is the mixing radius of the paddles of the paddle mixer 29. η is the operating coefficient of the motor of the paddle mixer 29, and η is the total mechanical transmission efficiency of the paddle mixer 29.

[0081] Step 2: Based on the calculation results of Step 1, the control component controls the motor of the paddle mixer 29 to adjust the output power to the target output power.

[0082] The working principle and beneficial effects of the above technical solution are as follows: To ensure the consistency of chlorine dioxide solution preparation, the rotation speed of the stirring shaft of the paddle agitator 29 needs to be set to a preset speed during preparation. The preset speed can be set according to user needs. Both the mixing tank 28 and the paddle agitator 29 are existing equipment. After the raw materials are added to the mixing tank 28, the stirring shaft rotates stably at the preset speed, which can ensure the consistency of multiple chlorine dioxide solution preparations. Due to differences in the order or amount of raw materials added, the liquid density in the mixing tank 28 will change. Then, based on the detection value of the densitometer, the target output power of the motor of the paddle agitator 29 can be accurately calculated. In the calculation process, the motor operating coefficient was set to 1.2 and the total mechanical transmission efficiency was set to 65%. The motor operating coefficient and the total mechanical transmission efficiency of the paddle mixer 29 were taken into account to make the calculation results more accurate. Based on the calculation results, the control component can automatically adjust the output power of the motor of the paddle mixer 29 so that the output power of the motor of the paddle mixer 29 reaches the target output power. As the density inside the mixing tank 28 changes, the control component automatically adjusts the output power of the motor, thereby ensuring that the speed of the stirring shaft remains consistent, ensuring the consistency of the chlorine dioxide solution preparation, and improving the preparation quality of the chlorine dioxide solid preparation.

[0083] Comparative Example 1

[0084] A method for preparing a chlorine dioxide solid preparation differs from Example 1 in that, in step (1), the alkaline solution contains only 10% sodium hydroxide by mass and does not contain urea.

[0085] Comparative Example 2

[0086] A method for preparing a chlorine dioxide solid preparation differs from Example 1 in that, in step (1), the concentration (mass percentage) of styrene in the oxidative modification solution is 11%, and it does not contain acrylic acid.

[0087] Comparative Example 3

[0088] A method for preparing a solid chlorine dioxide formulation differs from Example 1 in that the carbonization treatment is not performed during the preparation of the adsorbent carrier.

[0089] Experimental Example

[0090] The solid chlorine dioxide formulations obtained in the examples and comparative examples were subjected to accelerated testing at an ambient temperature of 40°C. The gas release rate of chlorine dioxide from the solid chlorine dioxide formulations by weight of monomers was measured. Using the amount of chlorine dioxide released in the first 5 minutes of the liquid without carrier adsorption as a baseline (100%), the relative values ​​for 2h, 6h, 12h, 3 days, and 10 days were calculated. The results are shown in Table 1.

[0091] Table 1. Sustained-release properties

[0092]

[0093] The results showed that the sustained-release performance of Examples 1-5 was significantly better than that of Comparative Examples 1-3, with Examples 1-3 being superior to Examples 4 and 5. This demonstrates the significant influence of alkaline treatment, oxidative modification solution treatment, and carbonization treatment during the preparation of the adsorbent carrier of the present invention.

[0094] The preferred embodiments and examples of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments and examples. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the concept of the present invention.

Claims

1. A method for preparing a solid chlorine dioxide preparation, characterized in that, Includes the following steps: S01, an adsorbent carrier is prepared using plant straw as raw material. The preparation of the adsorbent carrier includes the step of treating the plant straw with an alkaline solution, wherein the alkaline solution includes sodium hydroxide and urea; it also includes the step of treating the alkaline-treated plant straw with an oxidation modification solution, wherein the oxidation modification solution includes styrene, acrylic acid and hydrogen peroxide; and then carbonization treatment is performed to obtain the adsorbent carrier. SO2 is used to prepare a chlorine dioxide solution. SO3 is adsorbed to obtain the chlorine dioxide solid preparation.

2. The preparation method according to claim 1, characterized in that, In S01, during the alkaline treatment, the weight ratio of the plant straw to the alkaline solution is 1:(10-50), the treatment is carried out at room temperature for 3-30 minutes, and the mass percentage concentration of sodium hydroxide and urea in the alkaline solution is 5-15%.

3. The preparation method according to claim 1, characterized in that, In S01, during the oxidation modification solution treatment, the weight ratio of the plant straw to the oxidation modification solution is 1:(8-15), and the treatment is carried out at 55-65℃ for 2-24 hours. In the oxidation modification solution, the mass percentage concentrations of styrene, acrylic acid, and hydrogen peroxide are 8-12%, 0.5-1.5%, and 1-10%, respectively.

4. The preparation method according to claim 1, characterized in that, In SO2, the raw materials for preparing chlorine dioxide solution are sodium chlorite, sodium percarbonate and hydrogen peroxide, with a weight ratio of (5-15):(1-3):(1-3) and a pH of 9-10.

5. The preparation method according to claim 1, characterized in that, In S03, the adsorbent carrier is mixed with chlorine dioxide solution and dried to obtain the chlorine dioxide solid preparation.

6. The preparation method according to claim 1, characterized in that, The adsorbent carrier is mixed with chlorine dioxide solution using a mixing device, which includes a storage tank, a mixing tank, and a placement plate. The storage tank stores chlorine dioxide solution and has a mounting frame on it. The mounting frame has a mounting plate on its upper end, and an electric push rod is mounted on the lower surface of the mounting plate. The mixing tank is located at the lower end of the electric push rod. The outer wall of the mixing tank has several liquid inlet holes, and the bottom of the mixing tank has a placement plate that is detachably connected to the bottom of the mixing tank. The placement plate has several liquid drain holes.

7. The preparation method according to claim 1, characterized in that, A waterproof motor is installed at the center of the top wall inside the placement plate. A screw is installed at the output end of the waterproof motor, and a pressure plate is installed on the screw. The center of the pressure plate is connected to the screw through a threaded hole. Several sliding holes are provided inside the pressure plate. One end of the sliding hole extends to the screw, and the other end of the sliding hole passes through the side wall of the pressure plate. A sliding rod is slidably installed in the sliding hole. A limiting hole is provided on the outer wall of the screw. One end of the sliding rod is adapted to the limiting hole. Several vertical sliding grooves are provided on the inner wall of the mixing box. The end of the sliding rod away from the limiting hole is adapted to the inner wall of the sliding groove. A guide groove is provided inside the pressure plate. The guide groove is connected to the sliding hole. A guide block is slidably installed in the guide groove. The lower end of the guide block is fixedly connected to the upper end of the sliding rod. The guide block is made of magnetic material. An electromagnetic block is installed at one end of the guide groove. A first spring is installed at the end of the guide block away from the electromagnetic block. The end of the first spring away from the guide block is fixedly connected to the inner wall of the guide groove.

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