Tea residue cat litter and preparation method thereof

Abstract

The invention relates to the technical field of cat litter production, in particular to a tea residue cat litter and a preparation method thereof.The tea residue cat litter comprises a functional layer, a protective layer and a water-soluble film layer; the functional layer is prepared from the following raw materials: tea residue powder, an antibacterial agent, powder essence, a binder, composite powder and deionized water; the raw material of the protective layer consists of composite powder; the water-soluble film layer is formed by drying water-soluble slurry; the composite powder comprises modified zeolite, bentonite and sodium bicarbonate. The tea residue cat litter provided by the invention is endowed with antibacterial, deodorizing and aroma-emitting effects on the functional layer; the protective layer is endowed with the function of a protective functional layer, so that the problems of allergy and the like caused by direct contact between an antibacterial agent and the skin of the cat are avoided; the water-soluble film layer is endowed with a sealing effect, so that on one hand, dust drifting in a room can be reduced, and on the other hand, the smell emitted by the essence can be greatly reduced, and cats and consumers can accept the essence easily; through compounding of a multi-layer structure, the overall quality of the tea residue cat litter is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cat litter production, and specifically provides a tea residue cat litter and a preparation method thereof. Background Art

[0002] With the increasing number of pet cats, as a consumable for cat breeding, the sales volume of cat litter has risen rapidly. In addition to using cat litter to handle urine and feces, people also have requirements for the deodorizing and antibacterial effects of cat litter, as well as improving the comfort and health safety of cats. The existing cat litters on the market are roughly divided into the following categories: bentonite cat litter, tofu cat litter, plant cat litter, mixed cat litter, crystal cat litter, wood chip cat litter, paper cat litter, etc. These cat litters have their own advantages, disadvantages and target audiences. Currently, the main types of bentonite cat litter are calcium-based bentonite cat litter or sodium-based bentonite cat litter, which have a wide market due to their low price, strong water absorption and comfortable foot feeling.

[0003] The patent with the application number 202311166478.7 discloses an easy-to-dispose water-soluble cat litter and a preparation method thereof, which mainly consists of plant fibers, modified starch, modified zeolite powder, guar gum, essence, etc., and has good water solubility, facilitating the flushing of cat litter; however, the component essence is directly exposed, and the emitted fragrance is relatively strong, which is not easily accepted by cats with sensitive smell, thus greatly limiting its application.

[0004] The patent with the application number 202211452366.3 discloses a cat litter companion deodorant pill-shaped particle and a preparation method thereof, which mainly consists of bentonite, corn starch, activated carbon powder, pomegranate peel extract, plant fibers, plant additives, bioenzymes, etc., and has good deodorizing, antibacterial and fragrance-enhancing effects, solving the problem of poor deodorizing and antibacterial effects of bentonite-based cat litter; however, it does not improve the problem of a large amount of dust in bentonite-based cat litter. The large amount of dust may cause allergic reactions in cats, and the dust dispersion will also cause pollution in the room.

[0005] Based on this, a tea residue cat litter and a preparation method thereof are proposed. Summary of the Invention

[0006] To overcome the deficiencies of the prior art, the present invention provides a tea residue cat litter and a preparation method thereof. The functional layer of the tea residue cat litter endows it with antibacterial, deodorizing and fragrance-emitting functions, the protective layer endows it with the function of protecting the functional layer, and the water-soluble film layer can reduce dust and fragrance, realizing the composite of a multi-layer structure and improving the overall quality of the tea residue cat litter.

[0007] To achieve the above object, the present invention provides the following technical solution: A tea residue cat litter, comprising a functional layer, a protective layer and a water-soluble film layer; the raw materials of the functional layer are composed of tea residue powder, antibacterial agent, powder fragrance, binder, composite powder and deionized water; the raw materials of the protective layer are composed of composite powder; the water-soluble film layer is formed by drying water-soluble slurry; the composite powder includes modified zeolite, bentonite and sodium bicarbonate.

[0008] Preferably, the antibacterial agent is any one of basic copper carbonate, copper chloride, zinc oxide; the binder is any one of water glass, guar gum, sodium carboxymethyl cellulose.

[0009] Preferably, in the composite powder, the mass ratio of modified zeolite, bentonite and sodium bicarbonate is (3-5):(12-15):(1-2).

[0010] Preferably, by weight, in the raw materials of the functional layer: 5-10 parts of tea residue powder, 0.1-0.5 parts of antibacterial agent, 0.1-1 part of powder fragrance, 3-5 parts of binder, 60-70 parts of composite powder, 10-15 parts of deionized water.

[0011] Preferably, the preparation method of the modified zeolite is as follows: S11. Immerse the zeolite in hydrochloric acid solution for 5-10 h, filter, wash and dry to obtain pretreated zeolite; S12. Immerse the pretreated zeolite in sodium chloride solution for 8-10 h, filter, wash and dry to obtain modified zeolite.

[0012] Preferably, in steps S11-S12, the concentration of the hydrochloric acid solution is 0.5-1 mol / L; the concentration of the sodium chloride solution is 0.5-1 mol / L.

[0013] Preferably, the preparation method of the water-soluble slurry is as follows: S21. Stir corn starch and deionized water at 50-55 °C according to a mass ratio of 1:20 to obtain a starch emulsion; S22. Stir soy lecithin and deionized water at 85-90 °C according to a mass ratio of 1:150 to obtain a phospholipid emulsion; S23. Stir glycerol, sodium alginate, cellulose nanofibers, starch emulsion and phospholipid emulsion evenly, and keep warm at 60-70 °C for 30-40 min to obtain water-soluble slurry.

[0014] Preferably, in step S23, by mass percentage, in the water-soluble slurry: 0.5% of glycerol, 0.5% of sodium alginate, 10% of cellulose nanofibers, 60% of starch emulsion, 29% of phospholipid emulsion.

[0015] The present invention also provides a preparation method of tea residue cat litter, comprising the following steps: (1) Uniformly mix tea residue powder, antibacterial agent, powder fragrance, binder and composite powder, pour them into a disk granulator, spray deionized water to start granulation, and obtain functional particles after sieving; (2) Lay the composite powder on a shaker, evenly spray the binder on the surface of the functional particles, then pour them onto the shaker for rolling and shaking, and obtain functional protective particles after shaking and sieving; (3) Perform drying treatment on the functional protective particles to form preformed particles composed of a functional layer and a protective layer; (4) Evenly spray the water-soluble slurry on the surface of the preformed particles, and after drying treatment, form a water-soluble film layer on the surface of the preformed particles to obtain tea residue cat litter.

[0016] Preferably, in step (3), perform drying treatment at 90 - 100 °C for 2 - 3 h; in step (4), perform drying treatment at 50 - 55 °C for 1 - 2 h. The particle size of the tea residue cat litter is 1.5 - 2 mm, and the water content ≤ 10%.

[0017] The present invention provides a tea residue cat litter and its preparation method, which has the following beneficial effects compared with the prior art: The tea residue cat litter in the present invention has the functions of antibacterial, deodorizing and emitting fragrance in the functional layer; the protective layer gives it the function of protecting the functional layer, that is, even if the water-soluble film layer is broken due to being licked or squeezed by a cat, it can avoid the direct contact between the antibacterial agent and the cat's skin, causing problems such as allergies; the water-soluble film layer gives it a sealing effect. On the one hand, it can reduce the dispersion of dust in the room, and on the other hand, it can greatly reduce the smell emitted by the fragrance, which is easy to be accepted by cats and consumers. Moreover, after the water-soluble film is broken, the fragrance can be normally emitted to reduce the smell of cat excrement; through the composite of multiple-layer structures, the overall quality of the tea residue cat litter is improved.

[0018] The present invention modifies zeolite by combining hydrochloric acid solution and sodium chloride solution. The hydrochloric acid solution can dissolve the substances blocking the zeolite pores, making its pores more unobstructed. The Na in the sodium chloride solution + can replace divalent ions such as Ca in zeolite 2+ to increase the pore size. In this way, the adsorption performance of zeolite can be improved, and thus the adsorption capacity of the tea residue cat litter for water and ammonia can be improved; the added sodium bicarbonate will decompose during the drying treatment, and the generated gas will escape, forming micropores on the functional layer and the protective layer, further improving the adsorption capacity of the tea residue cat litter for water and ammonia.

[0019] The present invention improves the strength of the water-soluble film layer by adding cellulose nanofibers to the water-soluble slurry, preventing it from being easily broken due to the squeezing or friction of the cat; however, the water-soluble film layer will dissolve and break when encountering cat excrement, so that the antibacterial agent and fragrance inside it can be released. Description of the Drawings

[0020] The accompanying drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings: Figure 1 It is a schematic structural diagram of the tea residue cat litter of the present invention. Specific embodiments

[0021] The following embodiments are used to detail the implementation manners of the present application, so as to fully understand how the present application uses technical means to solve technical problems and achieve the realization process of technical effects and implement accordingly.

[0022] Example 1 The preparation method of the modified zeolite is as follows: S11. Immerse zeolite (natural zeolite) in a 0.5 mol / L hydrochloric acid solution for 10 h, filter, wash, and dry to obtain pretreated zeolite; S12. Immerse the pretreated zeolite in a 1 mol / L sodium chloride solution for 8 h, filter, wash, and dry to obtain the modified zeolite.

[0023] Example 2 The preparation method of the modified zeolite is as follows: S11. Immerse zeolite (natural zeolite) in a 1 mol / L hydrochloric acid solution for 5 h, filter, wash, and dry to obtain pretreated zeolite; S12. Immerse the pretreated zeolite in a 0.5 mol / L sodium chloride solution for 10 h, filter, wash, and dry to obtain the modified zeolite.

[0024] Example 3 The preparation method of the water-soluble slurry is as follows: S21. Stir corn starch and deionized water at 55 °C in a mass ratio of 1:20 to obtain a starch emulsion; S22. Stir soy lecithin and deionized water at 85 °C in a mass ratio of 1:150 to obtain a phospholipid emulsion; S23. Weigh 0.5% glycerol, 0.5% sodium alginate, 10% cellulose nanofibers, 60% starch emulsion, and 29% phospholipid emulsion by mass percentage, stir evenly, and keep warm at 70 °C for 30 min to obtain the water-soluble slurry.

[0025] Example 4 The preparation method of the water-soluble slurry is as follows: S21. Stir corn starch and deionized water at 50 °C in a mass ratio of 1:20 to obtain a starch emulsion; S22. Stir soy lecithin and deionized water at 90 °C in a mass ratio of 1:150 to obtain a phospholipid emulsion. S23. Weigh 0.5% glycerol, 0.5% sodium alginate, 10% cellulose nanofibers, 60% starch emulsion, and 29% phospholipid emulsion by mass percentage, stir well, and keep warm at 60 °C for 40 min to prepare a water-soluble slurry.

[0026] Example 5 A preparation method of tea residue cat litter, comprising the following steps: (1) Uniformly mix tea residue powder, basic copper carbonate, osmanthus powder fragrance, guar gum, and composite powder, pour them into a disk granulator, spray in deionized water to start granulation, and obtain functional particles after sieving. Weigh 10 parts of tea residue powder, 0.1 part of basic copper carbonate, 1 part of osmanthus powder fragrance, 3 parts of guar gum, 70 parts of composite powder, and 10 parts of deionized water by weight. The composite powder is composed of modified zeolite, bentonite (calcium-based bentonite), and sodium bicarbonate mixed in a mass ratio of 5:12:2.

[0027] (2) Lay the composite powder on a shaker, evenly spray the guar gum on the surface of the functional particles, then pour them into the shaker for rolling and shaking, and obtain functional protective particles after shaking and sieving.

[0028] (3) Dry the functional protective particles at 90 °C for 3 h to form preformed particles composed of a functional layer and a protective layer.

[0029] (4) Evenly spray the water-soluble slurry on the surface of the preformed particles, dry them at 50 °C for 2 h, and form a water-soluble film layer on the surface of the preformed particles to obtain tea residue cat litter including a functional layer, a protective layer, and a water-soluble film layer. The obtained tea residue cat litter has a particle size of 1.5 - 2 mm and a water content of ≤ 10%.

[0030] In this example, the modified zeolite in Example 1 and the water-soluble slurry in Example 3 are used.

[0031] Example 6 A preparation method of tea residue cat litter, comprising the following steps: (1) Uniformly mix tea residue powder, copper chloride, lavender powder fragrance, sodium silicate, and composite powder, pour them into a disk granulator, spray in deionized water to start granulation, and obtain functional particles after sieving. Weigh 8 parts of tea residue powder, 0.3 part of copper chloride, 0.5 part of lavender powder fragrance, 4 parts of sodium silicate, 65 parts of composite powder, and 12 parts of deionized water by weight. The composite powder is composed of modified zeolite, bentonite (calcium-based bentonite), and sodium bicarbonate mixed in a mass ratio of 4:13:1.5.

[0032] (2) Lay the composite powder on a shaker, spray sodium carboxymethylcellulose evenly on the surface of the functional particles, then pour them into the shaker for rolling, and obtain the functional protective particles after shaking and sieving.

[0033] (3) Dry the functional protective particles at 95 °C for 2.3 h to form preformed particles composed of a functional layer and a protective layer.

[0034] (4) Spray the water-soluble slurry evenly on the surface of the preformed particles, dry them at 53 °C for 1.5 h, and form a water-soluble film layer on the surface of the preformed particles to obtain tea residue cat litter including a functional layer, a protective layer and a water-soluble film layer. The obtained tea residue cat litter has a particle size of 1.5 - 2 mm and a water content ≤ 10%.

[0035] In this example, the modified zeolite in Example 2 and the water-soluble slurry in Example 4 are used.

[0036] Example 7 A preparation method of tea residue cat litter includes the following steps: (1) Uniformly mix tea residue powder, zinc oxide, gardenia pollen essence, sodium carboxymethylcellulose and composite powder, pour them into a disk granulator, spray deionized water to start granulation, and obtain functional particles after sieving; By weight, weigh 5 parts of tea residue powder, 0.5 part of zinc oxide, 0.1 part of gardenia pollen essence, 5 parts of sodium carboxymethylcellulose, 60 parts of composite powder, and 15 parts of deionized water. In the composite powder, it is composed of modified zeolite, bentonite (calcium-based bentonite) and sodium bicarbonate in a mass ratio of 3:15:1.

[0037] (2) Lay the composite powder on a shaker, spray sodium carboxymethylcellulose evenly on the surface of the functional particles, then pour them into the shaker for rolling, and obtain the functional protective particles after shaking and sieving.

[0038] (3) Dry the functional protective particles at 100 °C for 2 h to form preformed particles composed of a functional layer and a protective layer.

[0039] (4) Spray the water-soluble slurry evenly on the surface of the preformed particles, dry them at 55 °C for 1 h, and form a water-soluble film layer on the surface of the preformed particles to obtain tea residue cat litter including a functional layer, a protective layer and a water-soluble film layer. The obtained tea residue cat litter has a particle size of 1.5 - 2 mm and a water content ≤ 10%.

[0040] In this example, the modified zeolite in Example 1 and the water-soluble slurry in Example 3 are used.

[0041] Comparative Example 1 A preparation method of tea residue cat litter is basically the same as that in Example 6, the difference is that: the modified zeolite is replaced with untreated natural zeolite.

[0042] Comparative Example 2 A preparation method of tea residue cat litter is basically the same as that of Example 6, except that the composite powder is composed of modified zeolite and bentonite (calcium-based bentonite) mixed in a mass ratio of 4:13.

[0043] Comparative Example 3 A preparation method of tea residue cat litter includes the following steps: (1) Uniformly mix tea residue powder, copper chloride, lavender powder fragrance, sodium silicate and composite powder, pour them into a disk granulator, spray deionized water to start granulation, and obtain functional particles after sieving; By weight, weigh 8 parts of tea residue powder, 0.3 part of copper chloride, 0.5 part of lavender powder fragrance, 4 parts of sodium silicate, 65 parts of composite powder, and 12 parts of deionized water. The composite powder among them is composed of modified zeolite, bentonite (calcium-based bentonite) and sodium bicarbonate mixed in a mass ratio of 4:13:1.5.

[0044] (2) Lay the composite powder on a shaker, uniformly spray sodium silicate on the surface of the functional particles, then pour them into the shaker for rolling and shaking, and obtain functional protective particles after shaking and sieving.

[0045] (3) Dry the functional protective particles at 95 °C for 2.3 h to form preformed particles composed of a functional layer and a protective layer, denoted as tea residue cat litter, control its particle size to be 1.5 - 2 mm, and the water content ≤ 10%.

[0046] In this comparative example, the modified zeolite in Example 2 is used.

[0047] Comparative Example 4 The preparation method of the water-soluble slurry is as follows: S21. Stir corn starch and deionized water at 50 °C in a mass ratio of 1:20 to obtain a starch emulsion; S22. Stir soy lecithin and deionized water at 90 °C in a mass ratio of 1:150 to obtain a phospholipid emulsion; S23. By mass percentage, weigh 0.5% of glycerol, 0.5% of sodium alginate, 65% of the starch emulsion and 34% of the phospholipid emulsion, stir them evenly, and keep them at 60 °C for 40 min to prepare the water-soluble slurry.

[0048] Quality Inspection 1. Use the tea residue cat litters in Examples 5 - 7 and Comparative Examples 1 - 3 as test samples.

[0049] Water absorption test: Take a tea residue cat litter sample, weigh and record it as ; then immerse the sample in deionized water for 5 min, take it out, dry the surface moisture, weigh and record it as , and the water absorption calculation formula is,

[0050] Dust test: Take the tea residue cat litter sample and weigh it, denoted as ; Use a vibrating sieve with a mesh diameter of 0.2 mm 0.2 mm to sieve for 10 min at a frequency of 100 times / min to obtain the sieved sample, weigh it, and denote it as , and the loss rate calculation formula is

[0051] The specific test results are shown in Table 1.

[0052] Table 1 Water absorption rate and loss rate

[0053] As shown in Table 1: (1) Compared with Example 6, in Comparative Example 1, the zeolite was not modified, and in Comparative Example 2, sodium bicarbonate was not added, resulting in a lower water absorption rate of the prepared tea residue cat litter.

[0054] (2) Compared with Example 6, in Comparative Example 3, the water-soluble film layer was not coated, resulting in a higher loss rate, indicating that the dust in the tea residue cat litter of Comparative Example 3 is likely to disperse into the surrounding environment.

[0055] 2. Take the tea residue cat litters in Example 6 and Comparative Examples 1-2 as test samples.

[0056] Cohesion strength test: Place the tea residue cat litter in a container with a depth greater than 20 cm, take 20 ml of deionized water at 37 °C, drop it into the tea residue cat litter within 5 s, take out the agglomerated cat litter after 1 min, weigh it, and denote it as , then freely drop the agglomerated cat litter from a height of 50 cm, collect the broken cat litter, weigh it, and denote it as , and use the breakdown rate to represent the cohesion strength. The breakdown rate calculation formula is

[0057] Deodorization test: Under normal temperature and pressure conditions (20 °C, 1 atm), pass 15 L of ammonia gas at 1.5 mg / m 3 through a large bubble absorption tube containing 100 g of tea residue cat litter sample (pre-sprayed with deionized water to remove the water-soluble film layer and dried) at a flow rate of 1 L / min, circulate the gas for 24 h, collect the treated ammonia gas, and use the Nessler's reagent spectrophotometric method to measure the ammonia gas concentration and calculate the ammonia gas clearance rate. Ammonia gas clearance rate = (concentration before treatment - concentration after treatment) / concentration before treatment × 100%.

[0058] The specific test results are shown in Table 2.

[0059] Table 2 Collapse rate and ammonia clearance rate

[0060] As shown in Table 2: Compared with Example 6, the collapse rate of the tea residue cat litter in Comparative Examples 1-2 is relatively high, indicating that its cohesive strength is relatively weak; the ammonia clearance rate of the tea residue cat litter in Comparative Examples 1-2 is relatively low, indicating that its deodorizing effect is relatively poor.

[0061] 3. Use the water-soluble slurries in Example 4 and Comparative Example 4 as the test samples.

[0062] Tensile strength of the water-soluble film: Inject the sample into the mold and dry it at 50 °C for 2 h to obtain a water-soluble film with a thickness of 40 mm and a width of 12 mm. Use a TA-XTplus texture analyzer as the test instrument. First, perform height calibration before testing. The stretching distance is 20 mm, the return distance is 20 mm, the pre-test speed is 2 mm / s, the test speed is 1 mm / s, the post-test speed is 10 mm / s, and the trigger force is 5.0 g. The formula for calculating the tensile strength is

[0063] In the formula, is the maximum tensile force at the moment of fracture, N. The specific test results are shown in Table 3.

[0064] Table 3 Tensile strength

[0065] As shown in Table 3: Compared with Example 4, the water-soluble slurry in Comparative Example 4 does not contain cellulose nanofibers, resulting in relatively weak strength of the water-soluble film.

[0066] 4. Use the tea residue cat litters in Example 6 and Comparative Example 3 as the objects, smell the odor at close range and evaluate it. The specific evaluation results are shown in Table 4.

[0067] Table 4 Aroma evaluation

[0068] As shown in Table 4: Due to the coating of the water-soluble film layer, the tea residue cat litter in Example 6 can greatly reduce the emission of the lavender powder fragrance odor.

[0069] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tea residue cat litter, characterized in that, It includes a functional layer, a protective layer and a water-soluble film layer; The raw materials of the functional layer are composed of tea residue powder, antibacterial agent, powder fragrance, binder, composite powder and deionized water; The raw materials of the protective layer are composed of composite powder; The water-soluble film layer is formed by drying the water-soluble slurry; The composite powder includes modified zeolite, bentonite and sodium bicarbonate.

2. The tea residue cat litter according to claim 1, wherein The antibacterial agent is any one of basic copper carbonate, copper chloride, zinc oxide; the binder is any one of water glass, guar gum, sodium carboxymethyl cellulose.

3. The tea residue cat litter according to claim 1, wherein In the composite powder, the mass ratio of modified zeolite, bentonite and sodium bicarbonate is (3-5):(12-15):(1-2).

4. The tea residue cat litter according to claim 1, characterized in that, In terms of weight parts, in the raw materials of the functional layer: tea residue powder 5-10 parts, antibacterial agent 0.1-0.5 parts, powder fragrance 0.1-1 part, binder 3-5 parts, composite powder 60-70 parts, deionized water 10-15 parts.

5. The tea residue cat litter according to claim 1, characterized in that, The preparation method of the modified zeolite is as follows: S11. Immerse the zeolite in hydrochloric acid solution for 5-10 h, filter, wash and dry to obtain pretreated zeolite; S12. Immerse the pretreated zeolite in sodium chloride solution for 8-10 h, filter, wash and dry to obtain modified zeolite.

6. The tea residue cat litter according to claim 5, wherein In steps S11-S12, the concentration of the hydrochloric acid solution is 0.5-1 mol / L; the concentration of the sodium chloride solution is 0.5-1 mol / L.

7. The tea residue cat litter according to claim 1, wherein The preparation method of the water-soluble slurry is as follows: S21. Stir corn starch and deionized water at 50-55 °C according to a mass ratio of 1:20 to obtain a starch emulsion; S22. Stir soy lecithin and deionized water at 85-90 °C according to a mass ratio of 1:150 to obtain a phospholipid emulsion; S23. Stir glycerol, sodium alginate, cellulose nanofibers, starch emulsion and phospholipid emulsion evenly, and keep warm at 60-70 °C for 30-40 min to obtain a water-soluble slurry.

8. The tea residue cat litter according to claim 7, characterized in that, In step S23, in terms of mass percentage, in the water-soluble slurry: glycerol 0.5%, sodium alginate 0.5%, cellulose nanofibers 10%, starch emulsion 60%, phospholipid emulsion 29%.

9. The preparation method of the tea residue cat litter according to any one of claims 1-8, characterized in that, It includes the following steps: (1) Uniformly mix tea residue powder, antibacterial agent, powder fragrance, binder and composite powder and pour them into a disk granulator, spray in deionized water to start granulation, and obtain functional particles after sieving; (2) Lay the composite powder on a shaker, evenly spray the binder on the surface of the functional particles, then pour them into the shaker for rolling and shaking, and obtain functional protective particles after shaking and sieving; (3) Dry the functional protective particles to form preformed particles composed of a functional layer and a protective layer; (4) Uniformly spray the water-soluble slurry on the surface of the preformed particles, and after drying treatment, form a water-soluble film layer on the surface of the preformed particles to obtain tea residue cat litter.

10. The preparation method of the tea residue cat litter according to claim 9, wherein, In step (3), dry at 90-100 °C for 2-3 h; in step (4), dry at 50-55 °C for 1-2 h, the particle size of the tea residue cat litter is 1.5-2 mm, and the water content ≤10%.

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