Preparation method of bio-based cat litter

Abstract

The invention relates to the technical field of cat litter methods, and discloses a preparation method of bio-based cat litter, which comprises the following steps: s1, mixing and stirring the following raw materials in parts by weight: 50-60 parts of modified bagasse, 5-8 parts of tourmaline powder, 3-5 parts of binder and 15-25 parts of water into paste, and marking the paste as a main material; s2, uniformly mixing and stirring the following raw materials in parts by weight: 1-3 parts of a microbial agent, 2-4 parts of activated carbon particles, 0.2-0.5 part of a dispersing agent and 8-12 parts of water, and marking as an auxiliary material; s3, granulating the main material through a granulator, and drying after granulation to obtain primary cat litter; s4, immersing the primary cat litter into an auxiliary material, and drying to obtain a cat litter inner core; and s5, uniformly mixing the following raw materials in parts by weight: 1-2 parts of red soil and 2-6 parts of water into slurry, heating the slurry, uniformly spraying the slurry on the surface of the cat litter core, and finally, circularly drying by hot air to obtain the cat litter. The cat litter prepared by the method has the beneficial effects of being good in water absorption, good in deodorization effect, environment-friendly and decomposable in use.

Description

Technical Field

[0001] The present invention relates to the technical field of cat litter methods, and particularly to a preparation method of a bio-based cat litter. Background Art

[0002] Cat litter is a pet product with a very large consumption both at home and abroad. Common cat litters on the market at present include bentonite cat litter, tofu cat litter, pinewood cat litter, etc. Bentonite cat litter has good water absorption, but it is easy to generate dust that irritates the respiratory tract and is also non-degradable; tofu cat litter has strong hygroscopicity but is easy to caking; pinewood cat litter has good water absorption and is decomposable, but it needs to be replaced frequently and has relatively large dust. These existing cat litters usually deodorize by adsorbing moisture, and the deodorizing effect is not good. Summary of the Invention

[0003] In order to solve the above problems existing in the prior art, the present invention provides a preparation method of a bio-based cat litter with good water absorption, good deodorizing effect, and environmentally friendly and decomposable use.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A preparation method of a bio-based cat litter, comprising the following steps: S1. Mix and stir the following raw materials in parts by weight: 50-60 parts of modified bagasse, 5-8 parts of tourmaline powder, 3-5 parts of binder, and 15-25 parts of water until it becomes a paste, and mark it as the main material; S2. Mix and stir evenly the following raw materials in parts by weight: 1-3 parts of microbial inoculum, 2-4 parts of activated carbon microparticles, 0.2-0.5 part of dispersant, and 8-12 parts of water, and mark it as the auxiliary material; S3. Granulate the main material through a granulator, and dry it at a drying temperature of 130-150 °C after granulation to obtain primary cat litter with a particle size of 2-4 mm; S4. Immerse the primary cat litter in the auxiliary material, take it out after soaking for 3-15 min, and dry it at a drying temperature of 80-95 °C to obtain the cat litter core; S5. Mix the following raw materials in parts by weight: 1-2 parts of red clay and 2-6 parts of water into a uniform slurry, heat the slurry to 80-90 °C, and directly and evenly spray it on the surface of the cat litter core at a temperature of 80-90 °C, and finally dry it through hot air circulation at 80-90 °C to obtain the cat litter.

[0005] By adopting the above technical solution: Firstly, modified bagasse and tourmaline powder are used as raw materials to prepare primary cat litter. Bagasse itself has good antibacterial and water-absorbing agglomeration properties, and is environmentally friendly and economical (the cost of bagasse is about 60% of that of pine wood). When combined with tourmaline powder, it forms a "skeleton-filling" structure, reducing pore blockage, extending the water absorption time, and having a better water absorption rate than traditional bentonite cat litter. Utilizing the piezoelectric effect of tourmaline can catalyze the decomposition of volatile substances in urine, thereby enhancing the deodorization performance. Tourmaline itself can also release negative oxygen ions, increasing the concentration of negative oxygen ions in the indoor environment and improving air quality. The primary cat litter is soaked entirely in the auxiliary materials. Part of the microbial agent and activated carbon particles in the auxiliary materials will enter the pores inside the primary cat litter, and the other part will remain on the surface of the primary cat litter. The microbial agent, on the one hand, quickly decomposes organic substances (such as urea, uric acid, fatty acids, etc.) in feces and urine in the cat litter into carbon dioxide, water, and salts. On the other hand, it achieves competitive inhibition by competing for nutrients with other bacteria in the cat litter, thereby reducing the growth of pathogenic bacteria such as Escherichia coli and Salmonella. On the third hand, the metabolites of the bacterial cells can enhance the water retention rate of the cat litter and adsorption. Finally, the cat litter is made by wrapping the inner core of the cat litter with red clay slurry, which improves the hardness and abrasion resistance of the surface layer of the cat litter, reduces the generation of dust, and also plays a protective role for the internal microbial agent. The cat litter prepared by this method has good performance in water absorption, deodorization, antibacterial property, and environmental friendliness.

[0006] Preferably, the preparation method of the modified bagasse in step s1 is as follows: The bagasse is dried to a moisture content of 10-15%, crushed into particles of 3-5 mm, and then ball-milled for 15-40 min to obtain bagasse pulp. After the bagasse pulp is centrifuged to remove water, bagasse powder is obtained. The bagasse powder is stirred and baked at 120-150 °C for 15-30 min, and the modified bagasse is obtained after baking. After the bagasse is crushed and ball-milled, it forms a three-dimensional porous structure, providing a basis for rapid water absorption and agglomeration. After the bagasse powder is baked at 120-150 °C, the surface is caramelized to form a hydrophobic layer, which forms a complement with the hydrophilicity of tourmaline, balancing the water absorption and water impermeability of the cat litter. On the other hand, phenolic substances such as guaiacol are formed after the bagasse powder is baked, which can inhibit Escherichia coli and improve the antibacterial performance.

[0007] Preferably, the main material in step s1 also includes 2-4 parts by weight of nano iron powder, and the particle size of the tourmaline powder in step s1 is configured to be 120-200 μm. Nano iron powder and tourmaline powder are used as fillers in the pores of bagasse. On the one hand, it reduces the fluidity of the bagasse pulp and improves the granulation stability. On the other hand, tourmaline and nano iron powder can synergistically enhance the redox ability and promote the oxidation and decomposition of odor substances. For example, mercaptans and indoles are oxidized to and Tourmaline and nano iron powder are complementary in microstructure. The fibrous structure of tourmaline can prevent the agglomeration of nano iron powder, and the nano iron powder fills the pores of tourmaline to form gradient adsorption, prolonging the contact time of pollutants.

[0008] Preferably, in step s1, the binder is melamine formaldehyde resin, and in step s2, the microbial inoculant is Bacillus subtilis. Bacillus subtilis can quickly decompose the organic matter (such as urea, uric acid, fatty acids) in feces and urine in the cat litter into carbon dioxide, water and salts. On the other hand, Bacillus subtilis has a relatively high heat-resistant temperature and can maintain its activity for a certain period of time at a temperature of 120°C. During the entire cat litter preparation process, the temperature of Bacillus subtilis is within 100°C, so it can maintain stable activity during the cat litter preparation process.

[0009] Preferably, the auxiliary materials in step s1 also include 1-2 parts by weight of bamboo leaf powder, and the particle size of the bamboo leaf powder is configured to be 20-50μm. Bamboo leaf powder is rich in cellulose and hemicellulose, and its porous structure can form a network adsorption grid, which synergistically acts with bagasse fiber to significantly improve the liquid penetration speed. On the other hand, the fine particles of bamboo leaf powder can fill the gaps in bagasse, further reducing the generation of dust. Bamboo leaf powder contains bamboo leaf flavonoids and phenolic acids, which have antibacterial activity (mainly against Escherichia coli and Staphylococcus aureus), and electrostatically adsorb and combine with tourmaline to be able to decompose odors such as ammonia for a long time.

[0010] Preferably, after taking out the dried primary cat litter, when the temperature of the primary cat litter drops to 85-95°C, directly immerse the primary cat litter in the auxiliary materials, take it out after soaking for 3-6 minutes. The primary cat litter at 85-95°C will not cause the microbial inoculant to lose its activity on the one hand. On the other hand, using the principle of thermal expansion and contraction, it is in a thermally expanded state at this temperature with large pores. After immersing in the auxiliary materials, it is beneficial for the microbial inoculant, activated carbon particles, etc. in the auxiliary materials to enter the pores of the bagasse, so as to increase the content of the microbial inoculant inside the cat litter and also prevent the damage to the microbial inoculant during the subsequent heating process.

[0011] Preferably, the slurry in step s5 also contains 0.2-0.5 parts by weight of tourmaline particles, and the particle size of the tourmaline particles is configured to be 60-150μm. The slurry sprayed on the surface of the cat litter contains tourmaline, and this tourmaline can better contact the air and enhance the release of negative oxygen ions. On the other hand, using the electrostatic adsorption property of tourmaline, it adsorbs the dust generated by the friction of the cat litter (the friction between cat litter particles will occur when shoveling the cat litter or the cat walks).

[0012] Therefore, the present invention has the following beneficial effects: (1) Using modified bagasse as the main raw material, bagasse is a by-product of the sugar industry with a low price, and the cost is only about 60% of that of pine sawdust, thus reducing the cost of cat litter; (2) Modified bagasse has good water absorption, which can improve the urine absorption speed. On the other hand, modified bagasse belongs to bio-based materials and is degradable, making it more environmentally friendly; (3) After being modified, a hydrophobic layer is formed on the surface of modified bagasse, which complements the hydrophilicity of tourmaline, balancing the water absorption and anti-permeability of cat litter; (4) Phenolic substances such as guaiacol are formed after baking bagasse powder, which can inhibit Escherichia coli and enhance the antibacterial performance; (5) Tourmaline powder in the primary cat litter fills the pores in the bagasse and decomposes volatile substances in urine by using the piezoelectric effect, thereby enhancing the deodorizing performance; (6) Tourmaline particles on the surface of the cat litter can generate negative oxygen ions and also adsorb dust by using the electrostatic adsorption property; (7) The microbial inoculant can maintain stable activity throughout the process of preparing the cat litter, and the microbial inoculant can better decompose organic matter in feces and urine; (8) The cat litter prepared by this method integrates water absorption, deodorization, antibacterial, less dust, and environmental protection. Detailed implementation manners

[0013] In order to make the technical problems, technical solutions and beneficial technical effects to be solved by the present invention more clearly understood, the present invention will be further described in detail below with reference to multiple exemplary embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the protection scope of the present invention.

[0014] It should be understood that in this text, expressions such as "first", "second", etc. are only used for descriptive purposes, and should not be construed as indicating or implying relative importance, nor should they be construed as implicitly indicating the number of the indicated technical features. Features defined with "first" and "second" may explicitly or implicitly include at least one of these features.

[0015] Example 1: A preparation method of a bio-based cat litter: The method includes the following steps: S1. Mix the following raw materials in parts by weight: 60 parts of modified bagasse, 8 parts of tourmaline powder, 5 parts of binder, and 25 parts of water, and stir until it becomes a paste, which is marked as the main material. The particle size of the tourmaline powder is configured to be 200 μm; S2. Mix the following raw materials in parts by weight: 3 parts of microbial inoculant, 4 parts of activated carbon microparticles, 0.5 part of dispersant, and 12 parts of water, and stir evenly, which is marked as the auxiliary material; S3. Granulate the main material through a granulator, and dry it at a drying temperature of 150 °C after granulation to obtain primary cat litter with a particle size of 4 mm; S4. Immerse the primary cat litter in the auxiliary material, take it out after soaking for 15 min, and dry it at a drying temperature of 95 °C to obtain the cat litter core; S5. Mix the following raw materials in parts by weight: 2 parts of red clay and 6 parts of water to form a uniform slurry. Heat the slurry to 80 - 90 °C, and directly and evenly spray it on the surface of the cat litter core at a temperature of 90 °C. Finally, dry it through hot air circulation at 90 °C to obtain the cat litter.

[0016] The preparation method of the modified bagasse in step S1 is as follows. The modification treatment steps of the bagasse are as follows: Dry the bagasse until the moisture content is 15%, crush it into 5 mm particles, then ball mill and grind for 40 min to obtain bagasse pulp. After centrifugally removing water from the bagasse pulp, obtain bagasse powder; Stir and bake the bagasse powder in an environment of 150 °C for 30 min, and obtain modified bagasse after baking.

[0017] Example 2: A preparation method of a bio-based cat litter: The method includes the following steps: S1. Mix the following raw materials in parts by weight: 50 parts of modified bagasse, 5 parts of tourmaline powder, 3 parts of binder, 2 parts of nano iron powder, and 15 parts of water, and stir until it becomes a paste, which is marked as the main material. The particle size of the tourmaline powder is configured to be 120 μm; S2. Mix the following raw materials in parts by weight: 1 part of microbial inoculant, 2 parts of activated carbon microparticles, 1 part of bamboo leaf powder, 0.2 part of dispersant, and 8 parts of water, and stir evenly, which is marked as the auxiliary material. The particle size of the bamboo leaf powder is configured to be 20 μm; S3. Granulate the main material through a granulator, and dry it at a drying temperature of 130 °C after granulation to obtain primary cat litter with a particle size of 2 mm; S4. Immerse the primary cat litter in the auxiliary material, take it out after soaking for 6 min, and dry it at a drying temperature of 80 °C to obtain the cat litter core; S5. Mix the following raw materials in parts by weight: 1 part of red clay and 2 parts of water to form a uniform slurry. Heat the slurry to 80 °C, and directly and evenly spray it on the surface of the cat litter core at a temperature of 80 °C. Finally, dry it through hot air circulation at 80 °C to obtain the cat litter.

[0018] The preparation method of the modified bagasse in step S1 is as follows. The modification treatment steps of the bagasse are as follows: Dry the bagasse until the moisture content is 10%, crush it into 3 mm particles, then ball mill and grind for 15 min to obtain bagasse pulp. After centrifugally removing water from the bagasse pulp, obtain bagasse powder; Stir and bake the bagasse powder in an environment of 120 °C for 15 min, and obtain modified bagasse after baking.

[0019] Example 3: A preparation method of a bio-based cat litter: The method comprises the following steps: S1. Mix the following raw materials in parts by weight: 55 parts of modified bagasse, 6 parts of tourmaline powder, 4 parts of binder, 3 parts of nano iron powder, and 20 parts of water, and stir until it becomes a paste, which is marked as the main material. The particle size of the tourmaline powder is configured to be 160 μm; S2. Mix the following raw materials in parts by weight: 2 parts of microbial inoculum, 3 parts of activated carbon microparticles, 0.35 parts of dispersant, 1.5 parts of bamboo leaf powder, and 10 parts of water, and stir evenly, which is marked as the auxiliary material. The particle size of the bamboo leaf powder is configured to be 30 μm; S3. Granulate the main material through a granulator, and dry it at a drying temperature of 140 °C after granulation to obtain primary cat litter with a particle size of 3 mm; S4. Immerse the primary cat litter in the auxiliary material, take it out after soaking for 10 min, and dry it at a drying temperature of 90 °C to obtain the cat litter core; S5. Mix the following raw materials in parts by weight: 1 part of red clay and 2 parts of water to form a uniform slurry. Heat the slurry to 85 °C and directly spray it evenly on the surface of the cat litter core at 85 °C, and finally dry it through hot air circulation at 85 °C to obtain the cat litter.

[0020] The preparation method of the modified bagasse in step S1 is as follows. The modification treatment steps of the bagasse are as follows: Dry the bagasse until the moisture content is 12%, crush it into 4 mm particles, and then grind it in a ball mill for 26 min to obtain bagasse pulp. After centrifuging and dehydrating the bagasse pulp, bagasse powder is obtained; Bake the bagasse powder by stirring in an environment of 135 °C for 22 min, and the modified bagasse is obtained after baking.

[0021] Example 4: A preparation method of a bio-based cat litter: The method comprises the following steps: S1. Mix the following raw materials in parts by weight: 60 parts of modified bagasse, 5 parts of tourmaline powder, 5 parts of binder, 2 parts of nano iron powder, and 20 parts of water, and stir until it becomes a paste, which is marked as the main material. The particle size of the tourmaline powder is configured to be 150 μm; S2. Mix the following raw materials in parts by weight: 3 parts of microbial inoculum, 2 parts of activated carbon microparticles, 0.5 parts of dispersant, 2 parts of bamboo leaf powder, and 10 parts of water, and stir evenly, which is marked as the auxiliary material. The particle size of the bamboo leaf powder is configured to be 50 μm; S3. Granulate the main material through a granulator, and dry it at a drying temperature of 140 °C after granulation to obtain primary cat litter with a particle size of 3 mm; S4. Take out the dried primary cat litter, and directly immerse the primary cat litter in the auxiliary material when the temperature of the primary cat litter drops to 85 °C. Take it out after soaking for 3 min and dry it at a drying temperature of 95 °C to obtain the cat litter core; S5. Mix the following raw materials in parts by weight: 1 part of red clay and 4 parts of water to form a uniform slurry. Heat the slurry to 90 °C and directly spray it evenly on the surface of the cat litter core at 90 °C, and finally dry it through hot air circulation at 90 °C to obtain the cat litter.

[0022] The preparation method of the modified bagasse in step s1 is as follows. The modification treatment steps of bagasse are as follows: Dry the bagasse until the moisture content is 10%, crush it into 3-mm particles, then ball-mill and grind for 40 min to obtain bagasse pulp. After centrifugally removing water from the bagasse pulp, bagasse powder is obtained. Bake the bagasse powder by stirring in an environment of 140 °C for 25 min, and the modified bagasse is obtained after baking.

[0023] Example 5: s5. Mix the following raw materials in parts by weight: 2 parts of red clay, 4 parts of water, and 0.2 - 0.5 part of tourmaline microparticles with a particle size of 100 μm into a uniform slurry. Heat the slurry to 90 °C and directly and evenly spray it on the surface of the cat litter core at 90 °C. Finally, dry it by hot air circulation at 90 °C to obtain cat litter. The remaining methods are the same as those in Example 4.

[0024] The binder in the above examples all uses melamine formaldehyde resin. The amino group in melamine formaldehyde resin forms hydrogen bond association with the hydroxyl group in bagasse fiber, forming a network structure with a crosslinking density of 1.2×10 4 mol / m³, and the compressive strength is increased from 15 N / cm² of the pure bagasse-based cat litter to 85 N / cm² (ASTM D790 test), meeting the trampling requirements of large feline animals. At the same time, the hydrophobic group ( ) of melamine formaldehyde resin forms a microphase separation structure with hydrophilic tourmaline (Si-OH) to achieve rapid moisture conduction and long-term water locking. The amino group of melamine formaldehyde resin coordinates with the surface defect sites of tourmaline, increasing the negative ion release amount of tourmaline and prolonging the half-life.

[0025] The microbial inoculant in the above examples all uses Bacillus subtilis. Bacillus subtilis can quickly decompose the organic substances (such as urea, uric acid, and fatty acids) in feces and urine in the cat litter into carbon dioxide, water, and salts, thereby reducing the wet weight of the cat litter, prolonging the replacement frequency of the cat litter, and reducing the use cost of the cat litter. Bacillus subtilis inhibits the growth of pathogenic bacteria such as Escherichia coli and Salmonella by competing for nutrients and secreting antibiotics (such as subtilin and bacitracin). The metabolites of the bacterial cells (such as dextran) can form a gel network, increasing the water retention rate of the cat litter by about 25%. The microbial activities promote fiber interweaving and reduce the dust release during processing and use. At the same time, Bacillus subtilis has a relatively high heat-resistant temperature and can maintain a certain activity at a temperature of 120 °C. In the above examples, during the entire cat litter preparation process, the temperature of Bacillus subtilis is within 100 °C, so it can maintain stable activity during the cat litter preparation process.

[0026] The dispersant in the above examples all uses lignosulfonate, which is extracted from wood, is non-toxic and biodegradable, and has little impact on microbial activity.

[0027] Qualitatively analyze and compare the cat litter prepared in the above embodiments with traditional pine cat litter, tofu cat litter, and bentonite cat litter in terms of unit volume weight, water absorbency, dustiness, and raw material cost, and form Table 1-1: Table 1-1 Sample Weight per unit volume Water absorbency Dustiness Raw material cost Example 1 Medium Higher Low Medium Example 2 Medium Higher Low Medium Example 3 Medium Higher Low Medium Example 4 Medium Higher Low Medium Example 5 Medium Higher Low Medium Pine wood cat litter Light Medium Low Medium Tofu cat litter Light Medium Medium Higher Bentonite cat litter Heavy Extremely high High Low Qualitatively analyze and compare the cat litter prepared in the above embodiments with traditional pine cat litter, tofu cat litter, and bentonite cat litter in terms of antibacterial property, deodorization property, degradability, and negative oxygen ion release amount, and form Table 1-2: Sample Bacteriostasis Deodorization Degradability Negative oxygen ion release amount Example 1 Better Excellent Extremely excellent Higher Example 2 Better Excellent Extremely excellent Higher Example 3 Excellent Excellent Extremely excellent Higher Example 4 Excellent Excellent Extremely excellent Higher Example 5 Excellent Excellent Extremely excellent Extremely high Pine wood cat litter Medium Medium Medium None Tofu cat litter Poorer Poorer Excellent None Bentonite cat litter Poorer Poorer Poor None In summary, it can be seen that the cat litter in this embodiment is significantly superior to traditional pine cat litter, tofu cat litter, and bentonite cat litter in terms of antibacterial, deodorization, degradability (environmental protection), negative ion release amount, and dustiness; at the same time, it also has a balanced performance in terms of water absorbency and cost.

[0028] In the description of the present invention, it should be understood that the directions or positional relationships indicated by up and down, left and right, inner end, outer end, one end, the other end, etc. are only for more clearly facilitating the description of the technical solution of the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific orientation, and should not be construed as a limitation to the present invention.

[0029] Although specific embodiments of the present invention are described in detail herein, they are given only for the purpose of explanation and should not be considered as limiting the scope of the present invention. Various substitutions, changes, and modifications can be conceived without departing from the spirit and scope of the present invention.

Claims

1. A method for preparing bio-based cat litter, characterized in that: The following steps are involved: s1. Mix and stir the following raw materials in parts by weight: 50-60 parts of modified bagasse, 5-8 parts of tourmaline powder, 3-5 parts of binder, and 15-25 parts of water until they become a paste, and mark them as the main material; s2. Mix the following raw materials in parts by weight: 1-3 parts of microbial agent, 2-4 parts of activated carbon particles, 0.2-0.5 parts of dispersant, and 8-12 parts of water, and stir evenly, marking them as auxiliary materials; S3, the main material is granulated by a granulator, and after granulation, it is dried at a drying temperature of 130-150°C to obtain a primary cat litter with a particle size of 2-4mm; s4, immerse the primary cat litter in the auxiliary material, take it out after soaking for 3-15 minutes, and dry it at a drying temperature of 80-95°C to obtain the cat litter core; s5, the following raw materials in parts by weight: 1-2 parts of red clay, 2-6 parts of water, are mixed into a uniform slurry, the slurry is heated to 80-90 ° C, and directly and evenly sprayed on the surface of the cat litter kernel with a temperature of 80-90 ° C, and finally the cat litter is dried by 80-90 ° C hot air circulation.

2. A method for preparing a bio-based cat litter according to claim 1, characterized in that: The preparation method of the modified bagasse in step s1 is as follows: the bagasse is dried to a moisture content of 10-15%, crushed into 3-5 mm particles, and then ball-milled for 15-40 minutes to obtain bagasse pulp, and the bagasse pulp is centrifuged to remove water to obtain bagasse powder; the bagasse powder is stirred and baked at 120-150°C for 15-30 minutes to obtain modified bagasse.

3. The method for preparing a bio-based cat litter according to claim 1, characterized in that: The main material in step s1 also includes 2-4 parts by weight of nano iron powder, and the particle size of the tourmaline powder in step s1 is configured to be 120-200 μm.

4. The method for preparing a bio-based cat litter according to claim 1, wherein: In step s1, the binder is melamine formaldehyde resin, and in step s2, the microbial agent is Bacillus subtilis.

5. A method for preparing a bio-based cat litter according to claim 1 or 2 or 3 or 4, characterized in that: The auxiliary materials in step s1 also include 1-2 parts by weight of bamboo leaf powder, and the particle size of the bamboo leaf powder is configured to be 20-50 μm.

6. The method for preparing a bio-based cat litter according to claim 1, characterized in that: In step s4, the dried primary cat litter is taken out, and when the temperature of the primary cat litter drops to 85-95° C., the primary cat litter is directly immersed in the auxiliary material, and taken out after being immersed for 3-6 minutes.

7. The method for preparing a bio-based cat litter according to claim 1, characterized in that: The slurry in step s5 also contains 0.2-0.5 parts by weight of tourmaline particles, and the particle size of the tourmaline particles is configured to be 60-150 μm.