A cat litter deodorizing powder composition and a method of making the same

Abstract

The present application relates to the field of deodorant, disclose a kind of cat litter deodorizing powder composition and its preparation method.The cat litter deodorizing powder composition includes: carbonate and / or bicarbonate 60~95%, silicon dioxide 5~40%, binder 0~10%, other auxiliary agent 0~10%;Wherein part of carbonate and / or bicarbonate is loaded in silicon dioxide, and the loading amount is 60~80% of silicon dioxide.The present application loads part of inorganic salt in cat litter deodorizing powder composition in silicon dioxide, can effectively avoid direct contact between inorganic salt and cat litter particles without affecting deodorizing effect, so as to effectively reduce the negative influence of inorganic salt on cat litter agglomeration, improve the use experience of product.

Description

Technical Field

[0001] This invention relates to the field of deodorants, and more particularly to a cat litter deodorizing powder composition and its preparation method. Background Technology

[0002] In recent years, with the increasing awareness of pet care, the pet market has gradually emerged. As an essential product in pet cleaning and hygiene products, cat litter plays an increasingly important role in the market. However, because cat litter emits an unpleasant odor after use, which can negatively impact the home environment, odor control has become a key concern for consumers.

[0003] Currently, inorganic salt-based cat litter deodorizing powders sold on the market use sodium bicarbonate or other bicarbonates as the main raw materials. Sodium bicarbonate neutralizes the odor in cat urine. However, we have found that these inorganic salt deodorizing powders have a serious problem affecting the clumping performance of cat litter. That is, the clumping strength of cat litter with sodium bicarbonate deodorizing powder will be greatly reduced, which will cause inconvenience to users' normal litter cleaning behavior. Instead, it will cause loose pieces of litter mixed with urine to fall into the litter box, reducing its deodorizing effect. Summary of the Invention

[0004] To address the technical problems of existing cat litter deodorizing powders significantly impacting litter clumping strength and exhibiting poor odor removal effects, this invention provides a cat litter deodorizing powder composition and its preparation method. This invention loads a portion of the inorganic salts in the cat litter deodorizing powder composition onto silica. This effectively prevents direct contact between the inorganic salts and cat litter particles without affecting the deodorizing effect, thereby significantly reducing the negative impact of inorganic salts on litter clumping.

[0005] The specific technical solution of this invention is as follows:

[0006] In a first aspect, the present invention provides a cat litter deodorizing powder composition comprising the following components by weight percentage: 60-95% carbonates and / or bicarbonates, 5-40% silica, 0-10% binder, and 0-10% other additives.

[0007] Some of the carbonates and / or bicarbonates are loaded in silica, with a loading amount of 60-80% of the silica.

[0008] The cat litter deodorizing powder composition of this invention mainly uses inorganic salts (carbonates) as deodorizing agents, which can neutralize cat urine odor when applied to the surface of the cat litter. However, as described in the background section, we found that the clumping strength of the cat litter significantly decreases after applying inorganic salts to the surface, making the cat litter brittle. This not only makes the cat litter difficult to clean but also reduces the deodorizing effect of the cat litter deodorizing powder itself. Our research team discovered that the root cause is that, taking common bentonite cat litter and tofu cat litter as examples, the addition of inorganic salts alters the ionic balance and charge properties of the raw materials in the cat litter. This may affect the charge density on the surface of bentonite and tofu cat litter particles, thereby changing the attraction and interaction between particles, increasing their repulsive effect, and thus weakening clumping. Therefore, this invention loads some inorganic salts onto silica. Silica has a porous structure and a large specific surface area, enabling it to load a certain amount of inorganic salts. This prevents the loaded inorganic salts from directly contacting the cat litter particles, effectively mitigating the negative impact of inorganic salts on the clumping properties of the cat litter.

[0009] To further reduce the negative impact of inorganic salts on cat litter clumping, an appropriate amount of binder can be added to the deodorizing powder composition. This provides good adhesion and adsorption, further ensuring that the impact of the deodorizing powder composition on the clumping ability of cat litter is minimized. It can even help cat litter clump when used in cat litter with poor clumping performance.

[0010] Preferably, the cat litter deodorizing powder composition comprises the following components by weight percentage: 70-90% carbonates and / or bicarbonates, 10-30% silica, 2-7% binder, and 0-10% other additives.

[0011] Preferably, the silica has undergone activation treatment, has an average particle size of 30–120 mesh, and a specific surface area of ​​200–350 m². 2 / g, with an oil absorption value of 170~280mL / 100g.

[0012] This invention reveals through experiments that ordinary silica has a weak loading capacity for inorganic salts at room temperature, but its loading capacity can be greatly enhanced after high-temperature activation. Furthermore, the loading capacity of activated silica is generally between 10% and 50%. Under the aforementioned particle size and specific surface area conditions, the loading capacity of activated silica can be significantly improved, fully utilizing the properties of silica to coat and load inorganic salts.

[0013] On the other hand, this invention also discovered that although silica can effectively load inorganic salts, adding it to cat litter deodorizing powder easily generates dust. Therefore, this invention found that by controlling the particle size of silica within the aforementioned range, not only is its loading capacity not affected, but the relatively large particle size also results in less dust generation. However, we subsequently discovered that because silica itself is relatively light, even with optimized particle size during mixing, some wear and tear still occurs, leading to dust generation and a poorer user experience. Ultimately, this invention solves the dust problem by minimizing silica content while ensuring that inorganic salts do not excessively affect the clumping properties of the cat litter; that is, only a portion of the inorganic salts are loaded into the silica (experiments ensured that the content of unloaded inorganic salts did not excessively affect the clumping properties of the cat litter).

[0014] Preferably, the carbonate is one or both of sodium carbonate and potassium carbonate; the bicarbonate is one or both of sodium bicarbonate and potassium bicarbonate.

[0015] Preferably, the adhesive contains at least a polysaccharide adhesive.

[0016] Furthermore, the polysaccharide adhesive comprises one or more of guar gum, xanthan gum, locust bean gum, guar gum, and other galactomannan-based plant gums.

[0017] This invention discovers that the type of polysaccharide adhesive significantly affects its adhesive effect. The reason for choosing galactomannan-based plant gums in this invention is that they exhibit the highest viscosity in aqueous solutions with a pH of 6–8. Since the pH of cat urine is approximately 7–7.5, this type of gum has a better ability to clump cat litter under normal cat urine conditions. Furthermore, due to the compatibility of this type of gum with inorganic salts (carbonates and bicarbonates), its aqueous solution shows strong tolerance to most monovalent salt ions, thus maintaining viscosity in inorganic salt environments and aiding in cat litter clumping.

[0018] Preferably, the pH of a 1% aqueous solution of the cat litter deodorizing powder composition is 7-9.

[0019] The cat litter deodorizing powder composition of the present invention has a suitable pH value, which can neutralize feline urinary tract acid and other acidic odor sources in cat urine in a weakly alkaline environment, and is also less irritating to the paw pads of cats.

[0020] Preferably, the other additives include one or more of the following: fragrance, nano zinc oxide, nano silver oxide, nano titanium dioxide, nano silver antibacterial agent, probiotic deodorizer, white oil, p-chloro-meta-xylenol, phenylpropionate isothiazolinone, and other functional additives.

[0021] The use of other additives can further enhance the deodorizing effect and inhibit bacterial growth, improving the hygiene and odor-removing performance of cat litter.

[0022] Secondly, the present invention provides a method for preparing a cat litter deodorizing powder composition, comprising the following steps:

[0023] Step 1): Activate the silicon dioxide by heating.

[0024] Step 2): Take a portion of carbonate and / or bicarbonate to prepare a saturated inorganic salt aqueous solution, add activated silica, soak and filter, vacuum dry, reheat to activate, cool, and obtain inorganic salt@silica powder.

[0025] Step 3): Weigh the inorganic salt@silica powder obtained in Step 2) to determine the loading amount of inorganic salt. Mix the inorganic salt@silica powder thoroughly with the remaining carbonates and / or bicarbonates, binders and other additives to obtain a cat litter deodorizing powder composition in the form of a powder mixture.

[0026] In the above process, the functions of the two high-temperature activations are as follows: Step 1) The first activation is to heat and activate silica to change its surface properties, increase its pore structure and surface area, thereby improving its loading capacity and providing more effective adsorption sites for subsequent loading of inorganic salts; Step 2) The second activation helps to improve the interaction between silica particles and inorganic salts, enhance the physical adsorption and binding force between them, thereby forming a more stable and efficient loading system.

[0027] Preferably, the activation temperature in steps 1) and 2) is 200–300°C, and the activation time is 2–5 hours.

[0028] Preferably, in step 2), the mass fraction of the saturated inorganic salt aqueous solution is 8-35%; and the soaking time is 24-36 hours.

[0029] Preferably, in step 3), the mixer used for mixing is a stirring mixer, a plow mixer, a zero-gravity mixer, a V-type mixer, or a three-dimensional oscillating mixer.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] (1) In this invention, some of the inorganic salts in the cat litter deodorizing powder composition are loaded into silica. Without affecting the deodorizing effect, the direct contact between inorganic salts and cat litter particles can be effectively avoided, thereby effectively reducing the negative impact of inorganic salts on the clumping of cat litter.

[0032] (2) By optimizing the specifications and content of silica in the formula, this invention can minimize the generation of dust while ensuring that inorganic salts do not have an excessive impact on the clumping of cat litter.

[0033] (3) The present invention adds an appropriate amount of polysaccharide binder to the deodorizing powder composition, which can provide good adhesion and adsorption, further ensuring that the influence of the deodorizing powder composition on the clumping ability of cat litter is minimized. Galactomannan-based plant gums are further preferred as binders, which have a better ability to clump cat litter in the pH environment of cat urine, and their aqueous solutions can show strong tolerance to most monovalent salt ions, so that their viscosity is not affected, thus assisting in the clumping of cat litter. Attached Figure Description

[0034] Figure 1 The photo shows the dust situation in Example 6;

[0035] Figure 2 Photographs showing dust conditions in Comparative Example 2;

[0036] Figure 3 This is a photograph of the dust situation in Example 7;

[0037] Figure 4 This is a photo showing the dust conditions in Comparative Example 4. Detailed Implementation

[0038] The present invention will be further described below with reference to embodiments.

[0039] General Implementation Examples

[0040] A cat litter deodorizing powder composition comprises the following components by weight percentage: 60-95% carbonates and / or bicarbonates, 5-40% silica, 0-10% binder, and 0-10% other additives. More preferably: 70-90% carbonates and / or bicarbonates, 10-30% silica, 2-7% binder, and 0-10% other additives; wherein a portion of the carbonates and / or bicarbonates are loaded into silica, with a loading amount of 60-80% of the silica, and the pH of a 1% aqueous solution of the cat litter deodorizing powder composition is 7-9.

[0041] Preferably, the silica undergoes activation treatment, resulting in an average particle size of 30–120 mesh and a specific surface area of ​​200–350 m². 2 / g, oil absorption value of 170-280mL / 100g; carbonate is one or both of sodium carbonate and potassium carbonate; bicarbonate is one or both of sodium bicarbonate and potassium bicarbonate; the adhesive contains at least a polysaccharide adhesive, further comprising one or more of guar gum, xanthan gum, locust bean gum, guar gum, and other galactomannan plant gums; other additives include one or more of fragrance, nano zinc oxide, nano silver oxide, nano titanium dioxide, nano silver antibacterial agent, probiotic deodorizer, white oil, p-chloro-m-xylenol, phenylisothiazolinone, and other functional additives.

[0042] A method for preparing a cat litter deodorizing powder composition includes the following steps:

[0043] Step 1): Activate the silica by heating (200-300℃, 2-5 hours).

[0044] Step 2): Take a portion of carbonate and / or bicarbonate to prepare an 8-35 wt% saturated inorganic salt aqueous solution, add activated silica, soak for 24-36 hours, filter, vacuum dry, reheat and activate (200-300℃, 2-5 hours), cool to obtain inorganic salt@silica powder.

[0045] Step 3): Weigh the inorganic salt@silica powder obtained in Step 2) to determine the inorganic salt loading. Thoroughly mix the inorganic salt@silica powder with the remaining carbonates and / or bicarbonates, binders, and other additives using a mixer to obtain a cat litter deodorizing powder composition in powder form. Preferably, the mixer is a stirring mixer, a plow mixer, a zero-gravity mixer, a V-type mixer, or a three-dimensional oscillating mixer. Specific Implementation

[0047] Experimental group 1

[0048] Table 1 shows the composition of each embodiment and comparative example in Experimental Group 1, based on 100 parts by weight.

[0049] Table 1. Composition of the cat litter deodorizing powder composition in Experimental Group 1

[0050] Element Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Sodium bicarbonate / g 60 70 80 90 95 99 50 Silica / g 40 30 20 10 5 1 50 1% solution pH 8.32 8.26 8.29 8.43 8.36 8.29 8.35

[0051] Preparation method of the cat litter deodorizing powder composition in Experimental Group 1: Silica was oxidized in a muffle furnace at 200℃ for 2 hours; sodium bicarbonate was prepared into an 8% sodium bicarbonate aqueous solution with 80% of the weight of silica, and the activated silica was added. After soaking for 24 hours, the solution was filtered, vacuum dried, and then activated again in a muffle furnace at 200℃ for 3 hours. After cooling in a desiccator, NaHCO3 / Na2CO3 / SiO2 solid was obtained. Finally, the obtained NaHCO3 / Na2CO3 / SiO2 solid and the remaining sodium bicarbonate were added to a mixer and thoroughly mixed.

[0052] In the embodiments and comparative examples, the silica particle size is approximately 50–80 mesh, and the specific surface area is approximately 250–300 m². 2 / g, with an oil absorption value of 200-250mL / 100g.

[0053] Experimental group 2

[0054] Table 2 shows the composition of the examples and comparative examples in Experimental Group 2, based on 100 parts by weight.

[0055] Table 2. Composition of the cat litter deodorizing powder composition in Experimental Group 2

[0056]

[0057] The preparation method of the cat litter deodorizing powder composition in Example 6 of Experimental Group 2 is as follows: 10g of silica was activated in a muffle furnace at 250℃ for 3 hours; 4g of sodium bicarbonate and 4g of potassium bicarbonate were prepared into an (8%+8%) mixed bicarbonate aqueous solution, and the activated silica was added. After soaking, the mixture was filtered, vacuum dried, and then activated again in a muffle furnace at 250℃ for 5 hours. After cooling in a desiccator, KHCO3 / NaHCO3 / K2CO3 / Na2CO3 / SiO2 solid was obtained. Finally, the obtained solid was added to a mixer along with the remaining sodium bicarbonate, potassium bicarbonate, 10g of locust bean gum, 4g of probiotic deodorizer, 1g of white oil, and 1g of fragrance for thorough mixing.

[0058] The preparation method of the cat litter deodorizing powder composition of Comparative Example 3 in Experimental Group 2 is as follows: 40g sodium bicarbonate, 34g potassium bicarbonate, 10g silicon dioxide, 10g locust bean gum, 4g probiotic deodorizer, 1g white oil and 1g fragrance are added to a mixer and mixed thoroughly.

[0059] In Example 6 and Comparative Example 3, the silica particles had a particle size of approximately 50–80 mesh and a specific surface area of ​​approximately 250–300 m². 2 / g, with an oil absorption value of 200-250mL / 100g.

[0060] Experimental group 3

[0061] Table 3 shows the composition of each embodiment and comparative example in test group 3, based on 100 parts by weight.

[0062] Table 3. Composition of the cat litter deodorizing powder composition in Experimental Group 3

[0063]

[0064] Preparation method of cat litter deodorizing powder composition in experimental group 3: 15g of silica was placed in a muffle furnace and activated at 300℃ for 2 hours; 12g of potassium bicarbonate was prepared into a 20% potassium bicarbonate aqueous solution, the activated silica was added, soaked for 36 hours, filtered, vacuum dried, and then placed in a muffle furnace and activated at 300℃ for 2 hours. After cooling in a desiccator, KHCO3 / K2CO3 / SiO2 solid was obtained and mixed with the remaining potassium bicarbonate and 5g of guar gum to obtain the target deodorizing powder composition.

[0065] In Example 7, the silica used had a particle size of approximately 50–80 mesh and a specific surface area of ​​approximately 250–300 m². 2 / g, with an oil absorption value of 200-250mL / 100g.

[0066] The silica used in Comparative Example 4 had a particle size of approximately 200–300 mesh and a specific surface area of ​​approximately 600–700 m². 2 / g, with an oil absorption value of 450-600mL / 100g.

[0067] The silica used in Comparative Example 5 had a particle size of approximately 10–20 mesh and a specific surface area of ​​approximately 80–100 m². 2 / g, with an oil absorption value of 50-100mL / 100g.

[0068] Experimental group 4

[0069] Table 4 shows the composition of each example and comparative example in Experimental Group 4, based on 100 parts by weight.

[0070] Table 4. Composition of the cat litter deodorizing powder composition in Experimental Group 4

[0071]

[0072] Preparation method of cat litter deodorizing powder composition in experimental group 4: 15g of silica was activated in a muffle furnace at 250℃ for 2 hours; 12g of potassium bicarbonate was prepared into a 20% potassium bicarbonate aqueous solution, the activated silica was added, and after soaking for 36 hours, it was filtered, vacuum dried, and then activated in a muffle furnace at 300℃ for 2 hours. After cooling in a desiccator, KHCO3 / K2CO3 / SiO2 solid was obtained. Finally, the obtained KHCO3 / K2CO3 / SiO2 solid was added to a mixer along with the remaining potassium bicarbonate, 1g of nano zinc oxide, 1g of white oil, the corresponding binder, and 1g of fragrance for thorough mixing.

[0073] In the embodiments and comparative examples, the silica particle size is approximately 50–80 mesh, and the specific surface area is approximately 250–300 m². 2 / g, with an oil absorption value of 200-250mL / 100g.

[0074] Experimental group 5

[0075] Table 5 shows the composition of the examples and comparative examples in test group 5, based on 100 parts by weight.

[0076] Table 5. Composition of the cat litter deodorizing powder composition in Experimental Group 5

[0077]

[0078] Preparation method of cat litter deodorizing powder composition in Example 10 of Experimental Group 5: 20g of silica was activated in a muffle furnace at 250℃ for 2 hours; 16g of sodium bicarbonate was prepared into a 20% sodium bicarbonate aqueous solution, the activated silica was added, and after soaking for 36 hours, it was filtered, vacuum dried, and then activated again in a muffle furnace at 300℃ for 2 hours. After cooling in a desiccator, NaHCO3 / Na2CO3 / SiO2 solid was obtained. Finally, the obtained NaHCO3 / Na2CO3 / SiO2 solid was added to a mixer with the remaining 56g of sodium bicarbonate, 7g of guar gum, and 1g of white oil and thoroughly mixed.

[0079] Preparation method of cat litter deodorizing powder composition in Comparative Example 8 of Experimental Group 5: 20g of silica was activated in a muffle furnace at 250℃ for 2 hours; 16g of sodium bicarbonate was prepared into a 20% sodium bicarbonate aqueous solution, the activated silica was added, and after soaking for 36 hours, it was filtered, vacuum dried, and cooled in a desiccator to obtain NaHCO3 / Na2CO3 / SiO2 solid. Finally, the obtained NaHCO3 / Na2CO3 / SiO2 solid was added to a mixer with the remaining 56g of sodium bicarbonate, 7g of guar gum, and 1g of white oil and thoroughly mixed.

[0080] The difference between the examples and the comparative examples lies in whether a second activation was performed after soaking, filtration, and drying.

[0081] In the embodiments and comparative examples, the silica particle size is approximately 50–80 mesh, and the specific surface area is approximately 250–300 m². 2 / g, with an oil absorption value of 200-250mL / 100g.

[0082] Sample performance testing

[0083] Test samples: cat litter deodorizing powder prepared in the examples and comparative examples, and blank control group, which is crushed mineral sand without deodorizing powder.

[0084] Test items and methods:

[0085] Test Item 1: Impact of Cat Litter Clumping Test

[0086] After mixing the test sample with crushed bentonite cat litter, the effect of the test sample on the clumping strength of the cat litter was tested, and a blank control group was set up for comparison.

[0087] The specific testing procedure is as follows: Place crushed bentonite cat litter in a transparent cup and gently shake to level the surface. Add 1.0g of test sample to the center of the litter cup. After adding the sample, carefully spread it evenly with a spatula. The spreading area should be a circular area 8-10mm from the cup wall, centered on the center point. After spreading, gently tap the sample surface with the spatula to allow some powder to penetrate deeper into the litter. Continue tapping until the litter is clearly visible within the spread area. Do not move the transparent cup throughout the entire preparation process.

[0088] Using a graduated pipette, draw 10 mL of 38℃ 1% sodium chloride solution. Keep the pipette vertical and allow the water to drain naturally from the center of the litter in the cup, 1-2 cm above the litter surface. After draining, time for 1 minute. Carefully pick out the litter clump, gently rotate it to let any embedded but not wet or clumped granules fall off, but do not shake it. Weigh the clump (m1). Drop the clump freely from a height of 50 cm onto a stainless steel mesh plate with a mesh size of 18mm × 18mm, a wire diameter of approximately 1.5mm, and dimensions of 15cm × 15cm. The stainless steel mesh plate should be 10cm above the ground or countertop. Observe the dispersion of the clump after the drop. Take the largest litter clump after the drop and weigh it (m2). Calculate its clumping strength.

[0089] Test Item 2: Deodorizing Powder Deodorizing Effect Test

[0090] The cat litter deodorizing powder composition of the example, the comparative composition and the blank control group were taken as test samples respectively. 10g of each sample was taken and 2g of cat urine odor source was added to it and aged for 7 days.

[0091] During the aging process, 10 members of the odor assessment team conducted a subjective olfactory evaluation of the sample odor each day, using the evaluation criteria shown in Table 6. The final average of all scores was then taken as the overall odor removal effect of the product.

[0092] Table 6 Sensory Evaluation Criteria for Deodorization Effect

[0093] score Scoring Criteria 1 The odor was extremely strong. 2 Strong odor 3 The odor is quite strong. 4 It has a distinct odor 5 The odor is mild. 6 Mild odor 7 No smell

[0094] Test Item 3: Deodorizing Powder Dust Test

[0095] In front of a black background, pour the sample into the sample basin at the same height, observe and record the dust situation of the sample, and the judgment criteria for the size of the dust are shown in Table 7.

[0096] Table 7. Standards for Judging Dust Pollution

[0097] score Scoring Criteria 1 Almost no dust was generated. 2 A slight amount of dust is generated, but the amount is very small and will not form noticeable floating dust. 3 The dust is relatively small and localized, and will not spread rapidly in the surrounding environment. 4 It produces noticeable dust, which is of medium density and spreads within a certain range. 5 The dust was dense, spread rapidly, and remained suspended in the air for a considerable period of time.

[0098] Test results:

[0099] The effect of the ratio of sodium bicarbonate to silica on product agglomeration and dust generation in Experiment Group 1

[0100] Table 8. Experimental Results of Experiment Group 1

[0101]

[0102] As shown in Table 8, with the increase of silica content, the clumping strength of cat litter increases after some inorganic salts are loaded, and compared with the blank, the deodorizing powder has a more prominent deodorizing effect. However, when the silica content reaches 50%, the product generates more dust (e.g., ...). Figure 1 and 2 Therefore, the preferred content of silica is 5-40%, and more preferably 10-30%.

[0103] The effect of product preparation process on product agglomeration in Experiment Group 2

[0104] Table 9. Results of Experiment Group 2

[0105] Test case Initial mass weight, g Maximum mass weight after the fall, g Agglomeration strength, % Deodorizing effect Blank control 22.36 21.67 96.91 2.29 Example 6 22.56 21.44 96.22 6.14 Comparative Example 3 23.24 21.10 58.60 5.86 As shown in Table 9, the difference between Example 6 and Comparative Example 3 is that in Example 6, some inorganic salts were loaded with silica, while in Comparative Example 3, a simple physical mixing was used. The comparison revealed that the loading process significantly affects the product's clumping ability. The cat litter clumping strength of the product prepared using the loading process reached over 96%, while the clumping strength of the cat litter prepared using the ordinary mixing process was less than 60%.

[0106] The impact of silica specifications on product agglomeration and dust generation in test group 3

[0107] Table 10 Results of Experiment Group 3

[0108] Test case Initial mass weight, g Maximum mass weight after the fall, g Agglomeration strength, % Dust situation Blank control 22.36 21.67 96.91 - Example 7 22.95 21.11 91.98 1 Comparative Example 4 23.13 20.64 89.23 5 Comparative Example 5 23.84 14.98 62.85 1

[0109] From Table 10 and Figure 3-4 As can be seen, the silica used in Comparative Example 4 has a large specific surface area, enabling it to load more inorganic salts, but its small particle size results in a large amount of dust when the mixed product is poured. Comparative Example 5 uses larger particle sizes, avoiding the large dust issue, but the disadvantages of large particle size are a small specific surface area, lower oil absorption value, and poor inorganic salt loading capacity, resulting in lower clumping strength in the cat litter produced using this example. In contrast, the silica used in Example 7 has a moderate particle size and specific surface area, effectively solving the problems of clumping strength and dust generation.

[0110] Effect of polysaccharide binder on product agglomeration in experimental group 4

[0111] Table 11 Results of Experiment Group 4

[0112] Test case Initial mass weight, g Maximum mass weight after the fall, g Agglomeration strength, % Blank control 22.36 21.67 96.91 Example 8 22.42 20.23 90.25 Example 9 23.42 22.46 95.89 Comparative Example 6 23.85 20.37 85.40 Comparative Example 7 24.03 20.42 84.98

[0113] As shown in Table 11, cat litter products containing galactomannan-based plant gums (guar gum) exhibit better clumping strength during use, while samples containing modified starch and those without binders show slightly weaker clumping strength.

[0114] The effect of secondary activation or non-activation in the preparation process of experimental group 5 on the product's agglomeration.

[0115] Table 12 Results of Experiment Group 5

[0116] Test case Initial mass weight, g Maximum mass weight after the fall, g Agglomeration strength, % Blank control 22.36 21.67 96.91 Example 10 24.44 23.54 96.33 Comparative Example 8 23.92 21.59 90.25

[0117] As shown in Table 12, Example 10, after secondary activation, significantly improved the clumping strength of cat litter. This is because the second activation helps to enhance the interaction between silica particles and inorganic salts, strengthening their physical adsorption and binding force, thereby forming a more stable and efficient loading system.

[0118] Unless otherwise specified, the raw materials and equipment used in this invention are all commonly used in the field; unless otherwise specified, the methods used in this invention are all conventional methods in the field.

[0119] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, alterations, and equivalent transformations made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A cat litter deodorizing powder composition characterized in that: comprises the following components by mass percentage: carbonate and / or bicarbonate 60-95%, average particle size 30-120 mesh, specific surface area 200-350 m 2 silica 5-40% having an average particle size of 30-120 mesh, a specific surface area of 200-350 m2 / g, an oil absorption value of 170-280 mL / 100 g, binder 0-10%, other additives 0-10%; wherein part of the carbonate and / or bicarbonate is loaded on the silica, and the loading amount is 60-80% of the silica; the carbonate is one or both of sodium carbonate and potassium carbonate; and the bicarbonate is one or both of sodium bicarbonate and potassium bicarbonate; the loading is achieved by immersing activated silica in a saturated aqueous inorganic salt solution containing carbonate and / or bicarbonate, followed by drying and heating activation.

2. The cat litter deodorizing powder composition of claim 1, wherein: comprises the following components by mass percentage: carbonate and / or bicarbonate 70-90%, silica 10-30%, binder 2-7%, other additives 0-10%; wherein part of the carbonate and / or bicarbonate is loaded on the silica, and the loading amount is 60-80% of the silica.

3. The cat litter deodorizing powder composition of claim 1, wherein: The binder at least comprises a polysaccharide binder.

4. The cat litter deodorizing powder composition of claim 3, wherein: The polysaccharide binder comprises one or more of guar gum, xanthan gum, locust bean gum, and sesbania gum.

5. The cat litter deodorizing powder composition of claim 1 or 2, wherein: The pH of a 1% aqueous solution of the cat litter deodorizing powder composition is 7-9.

6. The cat litter deodorizing powder composition of claim 1 or 2, wherein: The other additives comprise one or more of fragrance, nano-zinc oxide, nano-silver oxide, nano-titanium dioxide, nano-silver antibacterial agent, probiotic odor-removing agent, white oil, p-chloro-m-cresol, and benzisothiazolinone.

7. A process for the preparation of a cat litter deodorizing powder composition according to any one of claims 1 to 6, characterized in that: comprises the following steps: Step 1): heating activation of the silica; Step 2): a part of the carbonate and / or bicarbonate is prepared into a saturated aqueous inorganic salt solution, activated silica is added, and after soaking, suction filtration, vacuum drying, and heating activation again, the inorganic salt@silica powder is obtained after cooling; Step 3): the inorganic salt@silica powder obtained in Step 2) is weighed to determine the loading amount of the inorganic salt, and the inorganic salt@silica powder is thoroughly mixed with the remaining carbonate and / or bicarbonate, binder, and other additives to obtain a cat litter deodorizing powder composition in the form of a powder mixture.

8. The production method according to claim 7, characterized by: The temperature of the activation in Steps 1) and 2) is 200-300°C, and the activation time is 2-5 hours.

9. The preparation method of claim 7, characterized in that: in Step 2), the mass fraction of the saturated aqueous inorganic salt solution is 8-35%; in Step 2), the soaking time is 24-36 hours.

10. The production method according to claim 7, wherein: in Step 3), the mixing machine used for the mixing is a stirring mixer, a plow mixer, a gravity-free mixer, a V-shaped mixer, or a three-dimensional oscillating mixer.

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