Deodorizing antibacterial cat litter and preparation method thereof

Abstract

The invention relates to the technical field of pet supplies, in particular to deodorant and antibacterial cat litter and a preparation method thereof. The deodorant and antibacterial cat litter is prepared from the following raw materials in parts by weight: 50 to 250 parts of sodium bentonite, 40 to 100 parts of corncob powder, 30 to 80 parts of soybean curb residue, 80 to 220 parts of montmorillonite, 15 to 60 parts of baking soda, 20 to 40 parts of nano titanium dioxide, 30 to 70 parts of deodorant, 60 to 100 parts of functional additive, 80 to 120 parts of binder, 20 to 50 parts of activated carbon and 170 to 230 parts of water. The core of the technical scheme is as follows: efficient deodorization and antibiosis are realized through a specific functional aid, the functional aid takes diatomite subjected to acid leaching and calcining treatment as a porous carrier, nano cerium oxide and quaternary ammonium salt are loaded, and a three-dimensional network is formed by using a chemically grafted modifier for stabilization; the prepared cat litter not only has excellent antibacterial performance, but also has remarkable deodorization performance, and a healthier and more comfortable growth environment is created for pet cats while the quality of the cat litter is effectively guaranteed.

Description

Technical Field

[0001] This invention relates to the field of pet supplies technology, specifically to a deodorizing and antibacterial cat litter and its preparation method. Background Technology

[0002] With the increasing rate of pet cat ownership, the demand for "multi-functional integrated" cat litter is becoming increasingly urgent in the cat litter market. Most existing cat litters use a model of adding "antibacterial ingredients + deodorizing ingredients" separately. For example, some bentonite cat litters add a single antibacterial agent, while also adding deodorizing agents such as activated charcoal. This not only increases the cost of raw materials and the complexity of preparation, but also has the problem of poor compatibility between ingredients.

[0003] When ordinary bentonite cat litter relies on a single antibacterial agent, its antibacterial spectrum is narrow and its duration is short, with the antibacterial rate dropping below 50% after 3-5 days. Tofu cat litter commonly uses plant-derived deodorizers (such as tea polyphenols), which can temporarily mask odors but have no antibacterial effect, allowing bacteria to proliferate and continue to produce new odors. While crystal cat litter has strong absorbency, it lacks specialized functional additives, relying entirely on the physical adsorption of its silica gel material for antibacterial and deodorizing effects; after 24 hours, the ammonia odor removal rate drops from the initial 60% to below 30%.

[0004] Furthermore, there are very few applications in existing technologies that develop rare earth materials into dual-function additives that combine antibacterial and deodorizing properties. The unique 4f electron layer structure of rare earth elements allows them to achieve antibacterial effects by disrupting bacterial cell membranes, and also to deodorize by binding with odor molecules (such as NH3 and H2S) through ion exchange, exhibiting strong stability and no secondary pollution. Therefore, developing rare earth materials into specialized dual-function additives and applying them to the cat litter industry is a key direction for addressing the pain points of existing technologies.

[0005] Therefore, the present invention provides a deodorizing and antibacterial cat litter and its preparation method to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a deodorizing and antibacterial cat litter and its preparation method. The prepared cat litter product not only has excellent antibacterial properties, but also has significant deodorizing properties, effectively ensuring its quality while creating a healthier and more comfortable growing environment for pet cats.

[0007] To achieve the above objectives, the present invention provides the following technical solution: An odor-deodorizing and antibacterial cat litter is composed of the following raw materials in parts by weight: 50-250 parts sodium bentonite, 40-100 parts corn cob powder, 30-80 parts tofu residue, 80-220 parts montmorillonite, 15-60 parts baking soda, 20-40 parts nano titanium dioxide, 30-70 parts deodorizer, 60-100 parts functional additives, 80-120 parts binder, 20-50 parts activated carbon, and 170-230 parts water.

[0008] Furthermore, the functional additive is prepared by the following method: Step 1: Add potassium hydroxide and 5,5-dimethylhydantoin to deionized water, mix well, and then add 50-65% by volume of a methanol solution of 3-bromopropene with a concentration of 5.0-5.5 mol / L to the resulting mixture. Stir the reaction at 60-65℃ for 2-3 hours, then allow it to cool naturally to room temperature. After drying under reduced pressure, recrystallize it with petroleum ether. The resulting product is denoted as the modifier. The concentrations of potassium hydroxide and 5,5-dimethylhydantoin in the mixture are both 1.5-2.0 mol / L. Step 2: Disperse the pretreated porous carrier uniformly in the mixed solution at a dosage ratio of 30-80 g / L. Then add 1-2 times the mass of the modifier and 0.2-0.3 times the mass of the photoinitiator 651, respectively. After UV irradiation reaction, filter, wash with alcohol and vacuum dry the reaction solution in sequence to obtain the functional additive. The mixed solution is prepared by mixing 6-12 wt% of dodecyltrimethylammonium chloride aqueous solution with 0.8-1.5 times the volume of N,N-dimethylformamide.

[0009] Furthermore, the preparation method of the pretreated porous carrier is as follows: the porous carrier is uniformly dispersed in an 85-90wt% ethanol aqueous solution at a dosage ratio of 20-50g / L, a mercaptosilane coupling agent with a mass of 1-2 times that of the porous carrier is added, and the reaction is carried out at 60-70℃ for 4-6h. After that, the reaction solution is filtered, washed with ethanol and vacuum dried in sequence to obtain the product.

[0010] Furthermore, the mercaptosilane coupling agent is any one of γ-mercaptopropyltrimethoxysilane, γ-mercaptopropylmethyldimethoxysilane, and γ-mercaptopropyltriethoxysilane.

[0011] Furthermore, the ultraviolet light wavelength used in the ultraviolet irradiation reaction is 365nm, and the ultraviolet irradiation reaction time is 2-3h.

[0012] Furthermore, the porous carrier is prepared as follows: pretreated diatomaceous earth, deionized water, and polyvinylpyrrolidone are mixed evenly at a mass ratio of 1:10-15:0.3-0.5. The resulting mixture is heated to 80-90℃ and its pH is adjusted to 8.2-8.8 with a 30-40wt% sodium hydroxide solution. Then, cerium sulfate with a mass of 0.8-1.5 times that of the pretreated diatomaceous earth is added. After stirring for 1-2 hours, the pH is adjusted to 8.5-9.5 with a 30-40wt% sodium hydroxide solution. After stirring for another 2-4 hours, the mixture is then filtered, washed, vacuum dried, and sintered.

[0013] Furthermore, the preparation method of the pretreated diatomaceous earth is as follows: soak the diatomaceous earth in 2-3 mol / L dilute nitric acid for 2-3 hours, then filter it out and wash it until neutral; finally, calcine it at 300-400℃ for 2-3 hours to obtain the diatomaceous earth.

[0014] Furthermore, the deodorant is any one of peppermint essential oil, lemon essential oil, citrus essential oil, lavender essential oil, and rosemary essential oil.

[0015] Furthermore, the adhesive is any one of hydroxypropyl methylcellulose, xanthan gum, guar gum, and carrageenan.

[0016] A method for preparing deodorizing and antibacterial cat litter includes the following steps: Step 1: Accurately weigh each ingredient according to the formula, and put all ingredients except baking soda and water into the mixing equipment for mixing. After thorough mixing, a mixture is obtained. The second step is to add baking soda to water and stir thoroughly until it is completely dissolved; add the resulting baking soda solution to the mixture and stir thoroughly until it is in a moist state that can be formed into a ball when squeezed in the hand and easily dispersed when pressed; then, it goes through granulation, drying and sieving processes in sequence to obtain particles with a particle size of 1-3mm, which is the deodorizing and antibacterial cat litter product.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention employs a combination of acid leaching and high-temperature calcination to pretreat diatomaceous earth, effectively removing surface and internal impurities and significantly increasing its specific surface area. Then, through a chemical reaction, a large amount of nano-cerium oxide is deposited on the surface and within the structure of the pretreated diatomaceous earth, forming a cerium oxide film layer, effectively enhancing the antibacterial properties of the porous carrier. After treatment with a mercaptosilane coupling agent, the porous carrier introduces reactive reactive groups—thiol groups—on its surface and interior. The prepared pretreated porous carrier is then uniformly dispersed in a mixed solution containing dodecyltrimethylammonium chloride, allowing the dodecyltrimethylammonium chloride to be uniformly dispersed and adhered to the surface and porous structure within the pretreated porous carrier. Finally, under the action of photoinitiator 651, the pretreated porous carrier reacts with a modifier to form bonds, ultimately introducing a large amount of modifier onto its surface and interior. The modifier, through chemical bonds, forms a dense three-dimensional network on the surface and interior of the pretreated porous carrier, effectively "binding" the dodecyltrimethylammonium chloride and reducing its migration probability. Ultimately, the synergistic effect of nano-cerium oxide, dodecyltrimethylammonium chloride, and modifiers resulted in the prepared functional additive exhibiting excellent antibacterial properties.

[0018] 2. The introduction of nano-cerium oxide in this invention can disrupt the integrity of bacterial cell membranes by binding to phospholipid groups on the surface of bacterial cell membranes, leading to leakage of bacterial contents. Simultaneously, it inhibits the activity of respiratory enzymes and dehydrogenases within bacteria, blocking energy metabolism and achieving broad-spectrum inhibition of common pathogenic bacteria such as *Escherichia coli* and *Staphylococcus aureus*. Furthermore, it exhibits excellent deodorizing effects. First, the empty orbitals of nano-cerium oxide can form coordinate bonds with the lone pairs of electrons in odor molecules, achieving chemical adsorption. Second, the porous carrier provides an ultra-large specific surface area, physically adsorbing odor molecules. Third, nano-titanium dioxide generates hydroxyl radicals under light, which can oxidize and decompose the adsorbed odor molecules into CO2 and H2O, resulting in excellent deodorizing effects. The synergistic effect of functional additives and deodorizing agents gives the prepared cat litter significant deodorizing performance.

[0019] In summary, the cat litter product prepared by this invention not only has excellent antibacterial properties but also significant deodorizing properties, effectively ensuring its quality while creating a healthier and more comfortable growing environment for pet cats. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. Example 1:

[0021] An odor-removing and antibacterial cat litter is composed of the following ingredients in parts by weight: 50 parts sodium bentonite, 40 parts corn cob powder, 30 parts tofu residue, 80 parts montmorillonite, 15 parts baking soda, 20 parts nano titanium dioxide, 30 parts peppermint essential oil, 60 parts functional additives, 80 parts hydroxypropyl methylcellulose, 20 parts activated carbon, and 170 parts water.

[0022] Functional additives are prepared by the following method: Step 1: Add potassium hydroxide and 5,5-dimethylhydantoin to deionized water, mix well, and then add 50% of the volume of 3-bromopropene methanol solution with a concentration of 5.0 mol / L to the resulting mixture. Stir and react at 60°C for 3 hours, then allow to cool naturally to room temperature. After drying under reduced pressure, recrystallize with petroleum ether. The resulting product is denoted as the modifier. The concentrations of potassium hydroxide and 5,5-dimethylhydantoin in the mixture are both 1.5 mol / L. Step 2: The pretreated porous carrier is uniformly dispersed in the mixed solution at a dosage ratio of 30 g / L. Then, modifier with a mass of 1 times that of the pretreated porous carrier and photoinitiator 651 with a mass of 0.2 times are added. After UV irradiation reaction, the reaction solution is filtered, washed with alcohol, and vacuum dried in sequence to obtain the functional additive. The mixed solution is prepared by mixing 6 wt% dodecyltrimethylammonium chloride aqueous solution with N,N-dimethylformamide with a volume of 0.8 times that of the dodecyltrimethylammonium chloride. The UV irradiation reaction is carried out at a wavelength of 365 nm for 2 hours.

[0023] The pretreated porous support is prepared by uniformly dispersing the porous support in an 85wt% ethanol aqueous solution at a dosage ratio of 20g / L, adding γ-mercaptopropyltrimethoxysilane with a mass equal to that of the porous support, reacting at 60℃ for 6h, and then filtering, washing with ethanol and vacuum drying the reaction solution sequentially to obtain the pretreated porous support.

[0024] The porous carrier is prepared as follows: pretreated diatomaceous earth, deionized water and polyvinylpyrrolidone are mixed evenly in a mass ratio of 1:10:0.3. The resulting mixture is heated to 80°C and its pH is adjusted to 8.2 with 30wt% sodium hydroxide solution. Then, cerium sulfate with a mass of 0.8 times that of the pretreated diatomaceous earth is added. After stirring for 1 hour, the pH is adjusted to 8.5 with 30wt% sodium hydroxide solution. After stirring for another 2 hours, the mixture is then filtered, washed, vacuum dried and sintered.

[0025] The preparation method of pretreated diatomaceous earth is as follows: diatomaceous earth is soaked in 2 mol / L dilute nitric acid for 3 hours, then filtered and washed until neutral; finally, it is calcined at 300℃ for 3 hours to obtain the final product.

[0026] A method for preparing deodorizing and antibacterial cat litter includes the following steps: Step 1: Accurately weigh each ingredient according to the formula, and put all ingredients except baking soda and water into the mixing equipment for mixing. After thorough mixing, a mixture is obtained. The second step is to add baking soda to water and stir thoroughly until it is completely dissolved; add the resulting baking soda solution to the mixture and stir thoroughly until it is in a moist state that can be formed into a ball when squeezed in the hand and easily dispersed when pressed; then, it goes through granulation, drying and sieving processes in sequence to obtain granules with a particle size of 2mm, which is the deodorizing and antibacterial cat litter product. Example 2:

[0027] The preparation method of the deodorizing and antibacterial cat litter provided in this embodiment is basically the same as that in Example 1, except that the specific raw material ratios and preparation methods of the functional additives are not exactly the same. The specific ratios of the raw materials and the preparation methods of the functional additives in this embodiment are as follows: An odor-reducing and antibacterial cat litter is composed of the following ingredients in parts by weight: 150 parts sodium bentonite, 60 parts corn cob powder, 50 parts tofu residue, 120 parts montmorillonite, 40 parts baking soda, 30 parts nano titanium dioxide, 50 parts lemon essential oil, 80 parts functional additives, 100 parts xanthan gum, 30 parts activated charcoal, and 200 parts water.

[0028] Functional additives are prepared by the following method: Step 1: Add potassium hydroxide and 5,5-dimethylhydantoin to deionized water, mix well, and then add a methanol solution of 3-bromopropene with a volume of 60% and a concentration of 5.5 mol / L to the resulting mixture. Stir the mixture at 65°C for 2 hours, then allow it to cool naturally to room temperature. After drying under reduced pressure, recrystallize it with petroleum ether. The resulting product is denoted as the modifier. The concentrations of potassium hydroxide and 5,5-dimethylhydantoin in the mixture are both 2.0 mol / L. Step 2: Disperse the pretreated porous carrier uniformly in the mixed solution at a dosage ratio of 50 g / L. Then add 1.5 times the mass of the modifier and 0.3 times the mass of the photoinitiator 651, respectively. After UV irradiation reaction, filter, wash with alcohol and vacuum dry the reaction solution in sequence to obtain the functional additive. The mixed solution is prepared by mixing 10 wt% dodecyltrimethylammonium chloride aqueous solution and an equal volume of N,N-dimethylformamide. The UV wavelength used in the UV irradiation reaction is 365 nm and the UV irradiation reaction time is 3 h.

[0029] The pretreated porous support is prepared by uniformly dispersing the porous support in a 90wt% ethanol aqueous solution at a dosage ratio of 30g / L, adding γ-mercaptopropylmethyldimethoxysilane at a mass of 1.5 times that of the porous support, reacting at 65℃ for 5h, and then filtering, washing with ethanol and vacuum drying the reaction solution sequentially to obtain the pretreated porous support.

[0030] The porous carrier is prepared as follows: pretreated diatomaceous earth, deionized water and polyvinylpyrrolidone are mixed evenly in a mass ratio of 1:15:0.5. The resulting mixture is heated to 85°C and its pH is adjusted to 8.5 with 35wt% sodium hydroxide solution. Then, cerium sulfate with a mass of 1.2 times that of the pretreated diatomaceous earth is added. After stirring for 2 hours, the pH is adjusted to 9.0 with 35wt% sodium hydroxide solution. After stirring for another 3 hours, the mixture is then filtered, washed, vacuum dried and sintered.

[0031] The preparation method of pretreated diatomaceous earth is as follows: diatomaceous earth is soaked in 3 mol / L dilute nitric acid for 2 hours, then filtered out and washed until neutral; finally, it is calcined at 350℃ for 3 hours to obtain the final product. Example 3:

[0032] The preparation method of the deodorizing and antibacterial cat litter provided in this embodiment is basically the same as that in Example 1, except that the specific raw material ratios and preparation methods of the functional additives are not exactly the same. The specific ratios of the raw materials and the preparation methods of the functional additives in this embodiment are as follows: An odor-reducing and antibacterial cat litter is composed of the following ingredients in parts by weight: 250 parts sodium bentonite, 100 parts corn cob powder, 80 parts tofu residue, 220 parts montmorillonite, 60 parts baking soda, 40 parts nano titanium dioxide, 70 parts citrus essential oil, 100 parts functional additives, 120 parts guar gum, 50 parts activated charcoal, and 230 parts water.

[0033] Functional additives are prepared by the following method: Step 1: Add potassium hydroxide and 5,5-dimethylhydantoin to deionized water, mix well, and then add a methanol solution of 3-bromopropene with a volume of 65% and a concentration of 5.5 mol / L to the resulting mixture. Stir the mixture at 65°C for 2 hours, then allow it to cool naturally to room temperature. After drying under reduced pressure, recrystallize it with petroleum ether. The resulting product is denoted as the modifier. The concentrations of potassium hydroxide and 5,5-dimethylhydantoin in the mixture are both 2.0 mol / L. Step 2: The pretreated porous carrier is uniformly dispersed in the mixed solution at a dosage ratio of 80 g / L. Then, modifier with a mass of 2 times that of the pretreated porous carrier and photoinitiator 651 with a mass of 0.3 times are added. After UV irradiation reaction, the reaction solution is filtered, washed with alcohol, and vacuum dried in sequence to obtain the functional additive. The mixed solution is prepared by mixing 12 wt% dodecyltrimethylammonium chloride aqueous solution with N,N-dimethylformamide with a volume of 1.5 times that of the dodecyltrimethylammonium chloride. The UV irradiation reaction is carried out at a wavelength of 365 nm for 3 hours.

[0034] The pretreated porous support is prepared by uniformly dispersing the porous support in a 90wt% ethanol aqueous solution at a dosage ratio of 50g / L, adding γ-mercaptopropyltriethoxysilane with a mass of twice that of the porous support, reacting at 70℃ for 4h, and then filtering, washing with ethanol and vacuum drying the reaction solution to obtain the final product.

[0035] The porous carrier is prepared as follows: pretreated diatomaceous earth, deionized water and polyvinylpyrrolidone are mixed evenly in a mass ratio of 1:15:0.5. The resulting mixture is heated to 90°C and its pH is adjusted to 8.8 with 40wt% sodium hydroxide solution. Then, cerium sulfate with a mass of 1.5 times that of the pretreated diatomaceous earth is added. After stirring for 2 hours, the pH is adjusted to 9.5 with 40wt% sodium hydroxide solution. After stirring for another 4 hours, the mixture is then filtered, washed, vacuum dried and sintered.

[0036] The preparation method of pretreated diatomaceous earth is as follows: diatomaceous earth is soaked in 3 mol / L dilute nitric acid for 3 hours, then filtered out and washed until neutral; finally, it is calcined at 400℃ for 2 hours to obtain the final product.

[0037] Comparative Example 1: The difference between this comparative example and Example 1 is that an equal amount of pretreated porous carrier is used instead of functional additives in this comparative example.

[0038] Comparative Example 2: The difference between this comparative example and Example 1 is that an equal amount of pretreated diatomaceous earth is used instead of porous carrier as the raw material for preparing functional additives. That is, the pretreated diatomaceous earth is first modified with γ-mercaptopropyltrimethoxysilane, and then reacted with the modifier as a raw material to finally prepare functional additives.

[0039] Comparative Example 3: The difference between this comparative example and Example 1 is that the diatomaceous earth was not pretreated in this comparative example.

[0040] Comparative Example 4: The difference between this comparative example and Example 1 is that the mixed solution used in the preparation of the functional additives in this comparative example does not contain dodecyltrimethylammonium chloride.

[0041] Performance testing: The deodorizing and antibacterial cat litter samples prepared in Examples 1-3 and Comparative Examples 1-4 were subjected to the following performance tests, and the test data are recorded in the table below: 1. Antibacterial effect: The test was conducted using Appendix C5 of GB15979-2002, which is a test method for the performance of non-dissolving antibacterial (antimicrobial) products. The test colonies were: Staphylococcus aureus (ATCC6538), Escherichia coli (ATCC25922), and Aspergillus niger (ATCC16404).

[0042] 2. Clumping Strength: Place equal amounts of the cat litter samples prepared in Examples 1-3 and Comparative Examples 1-4 into a dish or litter tray, spreading them to a thickness of 5-6 cm. Using a pipette or a 10 mL syringe, add 10 mL of tap water (20-30℃) in a single line from approximately 5 cm away (adding over 10 seconds). Start timing after 30 seconds. Use a litter scoop to remove the clump of water-absorbing litter; any residue should drain through the scoop's openings. Weigh the clumped litter sample and record the total weight N1. Place the weighed litter sample at a height of 1 m and allow the litter clumps to fall freely and horizontally onto a flat cement surface twice. Weigh the two largest clumps on an electronic scale and record the weight N2. Calculate the clumping strength of the litter: N = N2 / N1 × 100%.

[0043] 3. Water absorption rate: Add 5±0.1g of cat litter sample to a 50mL PET bottle (bottom diameter 35mm), gently shake and spread it out. Use a pipette to quickly add 10mL of room temperature water 1cm away from the cat litter sample (within 2 seconds). Start timing after adding the water and record the time required for the water to be completely absorbed (no flow when the bottle is tilted).

[0044] 4. Ammonia removal rate: Take two 1-liter beakers and put two 1.5m... 3 In the air test chamber, 100g of cat litter samples from each example and comparative example were added to one beaker, while the other was left untreated as a blank control. 10mL of 0.1% ammonia water was added to each beaker, and the chamber was sealed for 1 hour. The ammonia removal rate was tested according to the sampling and sampling result analysis methods in "QB / T2761-2006 Method for Determining the Purification Effect of Indoor Air Purification Products".

[0045]

[0046] By comparing and analyzing the relevant data in the table, it can be seen that the cat litter product prepared by this invention not only has excellent antibacterial properties but also significant deodorizing properties, effectively ensuring its quality while creating a healthier and more comfortable growing environment for pet cats. This indicates that the deodorizing and antibacterial cat litter and its preparation method provided by this invention have a broader market prospect and are more suitable for promotion.

[0047] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An odor-deodorizing and antibacterial cat litter, characterized in that, It is composed of the following raw materials in parts by weight: 50-250 parts sodium bentonite, 40-100 parts corn cob powder, 30-80 parts tofu residue, 80-220 parts montmorillonite, 15-60 parts baking soda, 20-40 parts nano titanium dioxide, 30-70 parts deodorizer, 60-100 parts functional additives, 80-120 parts binder, 20-50 parts activated carbon, and 170-230 parts water.

2. The deodorizing and antibacterial cat litter according to claim 1, characterized in that, The functional additive is prepared by the following method: Step 1: Add potassium hydroxide and 5,5-dimethylhydantoin to deionized water, mix well, and then add 50-65% by volume of a methanol solution of 3-bromopropene with a concentration of 5.0-5.5 mol / L to the resulting mixture. Stir the reaction at 60-65℃ for 2-3 hours, then allow it to cool naturally to room temperature. After drying under reduced pressure, recrystallize it with petroleum ether. The resulting product is denoted as the modifier. The concentrations of potassium hydroxide and 5,5-dimethylhydantoin in the mixture are both 1.5-2.0 mol / L. Step 2: Disperse the pretreated porous carrier uniformly in the mixed solution at a dosage ratio of 30-80 g / L. Then add 1-2 times the mass of the modifier and 0.2-0.3 times the mass of the photoinitiator 651, respectively. After UV irradiation reaction, filter, wash with alcohol and vacuum dry the reaction solution in sequence to obtain the functional additive. The mixed solution is prepared by mixing 6-12 wt% of dodecyltrimethylammonium chloride aqueous solution with 0.8-1.5 times the volume of N,N-dimethylformamide.

3. The deodorizing and antibacterial cat litter according to claim 2, characterized in that, The preparation method of the pretreated porous carrier is as follows: the porous carrier is uniformly dispersed in an 85-90wt% ethanol aqueous solution at a dosage ratio of 20-50g / L, and a mercaptosilane coupling agent with a mass of 1-2 times that of the porous carrier is added. After reacting at 60-70℃ for 4-6h, the reaction solution is filtered, washed with ethanol and vacuum dried in sequence to obtain the final product.

4. The deodorizing and antibacterial cat litter according to claim 3, characterized in that: The mercaptosilane coupling agent is any one of γ-mercaptopropyltrimethoxysilane, γ-mercaptopropylmethyldimethoxysilane, and γ-mercaptopropyltriethoxysilane.

5. The deodorizing and antibacterial cat litter according to claim 2, characterized in that: The ultraviolet light wavelength used in the ultraviolet irradiation reaction is 365nm, and the ultraviolet irradiation reaction time is 2-3h.

6. The deodorizing and antibacterial cat litter according to claim 3, characterized in that, The porous carrier is prepared as follows: pretreated diatomaceous earth, deionized water and polyvinylpyrrolidone are mixed evenly at a mass ratio of 1:10-15:0.3-0.

5. The resulting mixture is heated to 80-90℃ and its pH is adjusted to 8.2-8.8 with 30-40wt% sodium hydroxide solution. Then, cerium sulfate with a mass of 0.8-1.5 times that of the pretreated diatomaceous earth is added. After stirring for 1-2 hours, the pH is adjusted to 8.5-9.5 with 30-40wt% sodium hydroxide solution. After stirring for another 2-4 hours, the mixture is then filtered, washed, vacuum dried and sintered.

7. The deodorizing and antibacterial cat litter according to claim 6, characterized in that, The pretreated diatomaceous earth is prepared by soaking it in 2-3 mol / L dilute nitric acid for 2-3 hours, then filtering it out and washing it until neutral; finally, it is calcined at 300-400℃ for 2-3 hours to obtain the final product.

8. The deodorizing and antibacterial cat litter according to claim 1, characterized in that: The deodorant is any one of peppermint essential oil, lemon essential oil, citrus essential oil, lavender essential oil, and rosemary essential oil.

9. The deodorizing and antibacterial cat litter according to claim 1, characterized in that: The binder is any one of hydroxypropyl methylcellulose, xanthan gum, guar gum, and carrageenan.

10. A method for preparing deodorizing and antibacterial cat litter according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Accurately weigh each ingredient according to the formula, and put all ingredients except baking soda and water into the mixing equipment for mixing. After thorough mixing, a mixture is obtained. The second step is to add baking soda to water and stir thoroughly until it is completely dissolved; add the resulting baking soda solution to the mixture and stir thoroughly until it is in a moist state that can be formed into a ball when squeezed in the hand and easily dispersed when pressed; then, it goes through granulation, drying and sieving processes in sequence to obtain particles with a particle size of 1-3mm, which is the deodorizing and antibacterial cat litter product.

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