Tea residue cat litter and a method of making the same

Abstract

The present application relates to the technical field of cat litter production, in particular to a tea dregs cat litter and a preparation method thereof, comprising a functional layer, a protective layer and a water-soluble film layer; the raw materials of the functional layer are composed of tea dregs powder, an antibacterial agent, a powder fragrance, a binder, a composite powder and deionized water; the raw materials of the protective layer are composed of the composite powder; the water-soluble film layer is formed after drying of a water-soluble slurry; and the composite powder comprises modified zeolite, bentonite and sodium bicarbonate. The tea dregs cat litter in the present application is endowed with the functions of antibiosis, deodorization and fragrance emission in the functional layer; is endowed with the function of a protective layer in the protective layer to avoid direct contact of the antibacterial agent with the skin of a cat and cause problems such as allergy; is endowed with the function of sealing in the water-soluble film layer, which can reduce the floating of dust in a room on the one hand and greatly reduce the odor emitted by the fragrance on the other hand, and is easy to be accepted by cats and consumers; and the overall quality of the tea dregs cat litter is improved through the combination of multiple layers.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cat litter production, in particular to a tea dregs cat litter and a preparation method thereof. BACKGROUND

[0002] With the increasing number of pet cats, as a consumable for cat feeding, the sales of cat litter have rapidly increased. In addition to using cat litter to treat urine and feces, people also have requirements for the deodorizing and bacteriostatic effects of cat litter, as well as the comfort and health and safety of cats. The existing cat litter on the market can be roughly divided into the following categories: bentonite cat litter, tofu cat litter, plant cat litter, mixed cat litter, crystal cat litter, wood cat litter, and paper cat litter, etc. These cat litters have their own advantages and disadvantages and target groups. At present, the main bentonite cat litter is calcium-based bentonite cat litter or sodium-based bentonite cat litter, which has a wide market due to its low price, strong water absorption, and comfortable foot feeling.

[0003] Patent No. 202311166478.7 discloses an easy-to-handle water-soluble cat litter and a preparation method thereof, which is mainly composed of plant fibers, modified starch, modified zeolite powder, guar gum, and essence, etc. It has good water solubility and is easy to flush. However, the essence component is directly exposed, and the fragrance emitted is relatively strong, which is not easily accepted by cats with sensitive olfactory senses, greatly limiting its application.

[0004] Patent No. 202211452366.3 discloses a cat litter companion deodorizing pellet particle and a preparation method thereof, which is mainly composed of bentonite, corn starch, activated carbon powder, pomegranate peel extract, plant fiber, plant additive, and biological enzyme, etc. It has good deodorizing, bacteriostatic, and fragrance-enhancing effects, solving the problem of poor deodorizing and bacteriostatic effects of bentonite cat litter. However, it does not improve the problem of large amount of dust of bentonite cat litter, which may cause allergic reactions in cats, and the dust dispersion may also cause room pollution.

[0005] Therefore, a tea dregs cat litter and a preparation method thereof are proposed. SUMMARY

[0006] To overcome the shortcomings of the prior art, the present application provides a tea dregs cat litter and a preparation method thereof. The functional layer of the tea dregs cat litter gives it the functions of antibiosis, deodorization, and fragrance emission. The protective layer gives it the function of protecting the functional layer. The water-soluble film layer can reduce dust and fragrance, realize the combination of multi-layer structure, and improve the overall quality of the tea dregs cat litter.

[0007] In order to achieve the above object, the present application provides the following technical scheme: A tea dregs 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 dregs powder, antibacterial agent, powder essence, 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 after the water-soluble slurry is dried; the composite powder comprises modified zeolite, bentonite and sodium bicarbonate.

[0008] Preferably, the antibacterial agent is any one of basic copper carbonate, copper chloride and zinc oxide; the binder is any one of water glass, guar gum and 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, in the raw materials of the functional layer, the tea dregs powder is 5-10 parts, the antibacterial agent is 0.1-0.5 parts, the powder essence is 0.1-1 part, the binder is 3-5 parts, the composite powder is 60-70 parts, and the deionized water is 10-15 parts by weight.

[0011] Preferably, the preparation method of the modified zeolite is as follows: S11, the zeolite is immersed in a hydrochloric acid solution for 5-10 h, and then filtered, washed and dried to obtain pretreated zeolite; S12, the pretreated zeolite is immersed in a sodium chloride solution for 8-10 h, and then filtered, washed and dried to obtain the 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, corn starch and deionized water at 50-55 DEG C are stirred at a mass ratio of 1:20 to obtain a starch emulsion; S22, soybean lecithin and deionized water at 85-90 DEG C are stirred at a mass ratio of 1:150 to obtain a phospholipid emulsion; S23, glycerol, sodium alginate, cellulose nanofiber, the starch emulsion and the phospholipid emulsion are uniformly stirred, and the mixture is incubated at 60-70 DEG C for 30-40 min to obtain the water-soluble slurry.

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

[0015] The present application also provides a preparation method of the tea dregs cat litter, comprising the following steps:

[0016] (1) evenly mix the tea dregs powder, antibacterial agent, powder fragrance, binder and composite powder, pour into a disc granulator, spray in deionized water to start granulation, and sieve to obtain functional granules;

[0017] (2) evenly spray the binder on the surface of the functional granules on a shaker, then pour into the shaker to roll and shake, sieve to obtain functional protective granules;

[0018] (3) dry the functional protective granules to form a preformed granule composed of a functional layer and a protective layer;

[0019] (4) evenly spray the water-soluble slurry on the surface of the preformed granule, dry to form a water-soluble film layer on the surface of the preformed granule, and obtain the tea dregs cat litter.

[0020] Preferably, in step (3), the drying treatment is carried out at 90-100 DEG C for 2-3h; in step (4), the drying treatment is carried out at 50-55 DEG C for 1-2h, the particle size of the tea dregs cat litter is 1.5-2mm, and the water content is ≤10%.

[0021] The present application provides a kind of tea dregs cat litter and preparation method thereof, compared with prior art has the following beneficial effects:

[0022] The tea dregs cat litter in the present application endows the functional layer with antibacterial, deodorizing and aroma emitting functions; the protective layer endows the functional layer with protection function, even if the water-soluble film layer is broken by cat licking or extrusion, it can also avoid the problem of direct contact between antibacterial agent and cat skin causing allergy; the water-soluble film layer endows it with sealing function, which can reduce the dispersion of dust in the room on the one hand, and can greatly reduce the odor emitted by the fragrance, which is easy for cats and consumers to accept, and after the water-soluble film is broken, the fragrance can emit normal aroma, to reduce the odor of cat excrement; through the combination of multiple layers, the overall quality of the tea dregs cat litter is improved.

[0023] The present application modifies zeolite by combining hydrochloric acid solution and sodium chloride solution, the hydrochloric acid solution can dissolve the substances blocked in the zeolite pore, making the pore more unobstructed, Na + in the sodium chloride solution can replace Ca 2+ and other divalent ions in the zeolite, increase the pore size, so as to improve the adsorption performance of the zeolite, thereby improving the adsorption capacity of the tea dregs cat litter for water and ammonia gas; the added sodium bicarbonate will decompose during drying treatment, and the generated gas will escape to form micropores on the functional layer and protective layer, further improving the adsorption capacity of the tea dregs cat litter for water and ammonia gas.

[0024] The application improves the strength of the water-soluble film layer by adding cellulose nanofiber in the water-soluble slurry, and prevents the water-soluble film layer from being easily broken due to the extrusion or friction of the cat; but the water-soluble film layer will be dissolved and broken when encountering cat excrement, so that the antibacterial agent and fragrance inside can be released. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and serve to explain the principles of the application, and do not limit the application. In the drawings:

[0026] Figure 1 The figure shows the structure of the tea dregs cat litter. DETAILED DESCRIPTION

[0027] The following examples are used to illustrate the embodiments of the application, so that the application can be fully understood and implemented by using technical means to solve technical problems and achieve technical effects.

[0028] Example 1

[0029] The preparation method of the modified zeolite is as follows:

[0030] S11, the zeolite (natural zeolite) is immersed in a 0.5 mol / L hydrochloric acid solution for 10 h, and then filtered, washed and dried to obtain a pretreated zeolite;

[0031] S12, the pretreated zeolite is immersed in a 1 mol / L sodium chloride solution for 8 h, and then filtered, washed and dried to obtain a modified zeolite.

[0032] Example 2

[0033] The preparation method of the modified zeolite is as follows:

[0034] S11, the zeolite (natural zeolite) is immersed in a 1 mol / L hydrochloric acid solution for 5 h, and then filtered, washed and dried to obtain a pretreated zeolite;

[0035] S12, the pretreated zeolite is immersed in a 0.5 mol / L sodium chloride solution for 10 h, and then filtered, washed and dried to obtain a modified zeolite.

[0036] Example 3

[0037] The preparation method of the water-soluble slurry is as follows:

[0038] S21, corn starch and deionized water at 55℃ are stirred at a mass ratio of 1:20 to obtain a starch emulsion;

[0039] S22, soybean lecithin and deionized water at 85℃ were stirred at a mass ratio of 1:150 to obtain a phospholipid emulsion;

[0040] S23, glycerol 0.5%, sodium alginate 0.5%, cellulose nanofiber 10%, starch emulsion 60%, and phospholipid emulsion 29% were weighed and stirred uniformly, and the water-soluble slurry was prepared by incubating at 70℃ for 30 min.

[0041] Example 4

[0042] The preparation method of the water-soluble slurry is as follows:

[0043] S21, corn starch and deionized water at 50℃ were stirred at a mass ratio of 1:20 to obtain a starch emulsion;

[0044] S22, soybean lecithin and deionized water at 90℃ were stirred at a mass ratio of 1:150 to obtain a phospholipid emulsion;

[0045] S23, glycerol 0.5%, sodium alginate 0.5%, cellulose nanofiber 10%, starch emulsion 60%, and phospholipid emulsion 29% were weighed and stirred uniformly, and the water-soluble slurry was prepared by incubating at 60℃ for 40 min.

[0046] Example 5

[0047] A preparation method of tea dregs cat litter, comprising the following steps:

[0048] (1) uniformly mix tea dregs powder, basic copper carbonate, osmanthus powder essence, guar gum, and composite powder, and pour into a disc granulator, spray deionized water to start granulation, and sieve to obtain functional particles;

[0049] Tea dregs powder 10 parts, basic copper carbonate 0.1 part, osmanthus powder essence 1 part, guar gum 3 parts, composite powder 70 parts, and deionized water 10 parts were weighed by weight parts. The composite powder is mixed by modified zeolite, bentonite (calcium-based bentonite), and sodium bicarbonate at a mass ratio of 5:12:2.

[0050] (2) spread the composite powder on a shaker, uniformly spray guar gum on the surface of the functional particles, then pour into the shaker for rolling, and sieve after shaking to obtain functional protective particles.

[0051] (3) dry the functional protective particles at 90℃ for 3h to form a preformed particle composed of a functional layer and a protective layer.

[0052] (4) evenly spray the water-soluble slurry on the surface of the pre-formed particles, dry at 50℃ for 2h, form a water-soluble film layer on the surface of the pre-formed particles, and obtain the tea dregs cat litter comprising the functional layer, the protective layer and the water-soluble film layer, wherein the particle size of the obtained tea dregs cat litter is 1.5-2mm, and the water content is ≤10%.

[0053] In this embodiment, the modified zeolite in Example 1 and the water-soluble slurry in Example 3 are used.

[0054] Example 6

[0055] A preparation method of a tea dregs cat litter, comprising the following steps:

[0056] (1) evenly mix tea dregs powder, copper chloride, lavender powder essence, water glass and composite powder, pour into a disc granulator, spray in deionized water to start granulation, and obtain functional particles after sieving;

[0057] Tea dregs powder 8 parts, copper chloride 0.3 parts, lavender powder essence 0.5 parts, water glass 4 parts, composite powder 65 parts, and deionized water 12 parts are weighed by weight parts. The composite powder is mixed by modified zeolite, bentonite (calcium-based bentonite) and sodium bicarbonate in a mass ratio of 4:13:1.5.

[0058] (2) lay the composite powder on a shaker, evenly spray the water glass on the surface of the functional particles, then pour into the shaker for rolling, shake evenly, and obtain functional protective particles after sieving.

[0059] (3) dry the functional protective particles at 95℃ for 2.3h to form pre-formed particles composed of functional layer and protective layer.

[0060] (4) evenly spray the water-soluble slurry on the surface of the pre-formed particles, dry at 53℃ for 1.5h, form a water-soluble film layer on the surface of the pre-formed particles, and obtain the tea dregs cat litter comprising the functional layer, the protective layer and the water-soluble film layer, wherein the particle size of the obtained tea dregs cat litter is 1.5-2mm, and the water content is ≤10%.

[0061] In this embodiment, the modified zeolite in Example 2 and the water-soluble slurry in Example 4 are used.

[0062] Example 7

[0063] A preparation method of a tea dregs cat litter, comprising the following steps:

[0064] (1) evenly mix tea dregs powder, zinc oxide, gardenia flower powder essence, carboxymethyl cellulose sodium and composite powder, pour into a disc granulator, spray in deionized water to start granulation, and obtain functional particles after sieving;

[0065] Take tea dregs powder 5 parts, zinc oxide 0.5 parts, gardenia flower powder essence 0.1 parts, sodium carboxymethyl cellulose 5 parts, composite powder 60 parts, deionized water 15 parts by weight. The composite powder is mixed by modified zeolite, bentonite (calcium bentonite) and sodium bicarbonate in a mass ratio of 3:15:1.

[0066] (2) Lay the composite powder on the shaking table, evenly spray sodium carboxymethyl cellulose on the surface of the functional particles, then pour into the shaking table for rolling and shaking, sieve after shaking to obtain functional protective particles.

[0067] (3) Dry the functional protective particles at 100°C for 2h to form preformed particles composed of functional layer and protective layer.

[0068] (4) Evenly spray the water-soluble slurry on the surface of the preformed particles, dry at 55°C for 1h to form a water-soluble film layer on the surface of the preformed particles, and prepare tea dregs cat litter including functional layer, protective layer and water-soluble film layer. The particle size of the obtained tea dregs cat litter is 1.5-2mm, and the water content is ≤10%.

[0069] In this embodiment, the modified zeolite in Example 1 and the water-soluble slurry in Example 3 are used.

[0070] Comparative Example 1

[0071] A method for preparing tea dregs cat litter, which is basically the same as Example 6, except that the modified zeolite is replaced by untreated natural zeolite.

[0072] Comparative Example 2

[0073] A method for preparing tea dregs cat litter, which is basically the same as Example 6, except that the composite powder is mixed by modified zeolite and bentonite (calcium bentonite) in a mass ratio of 4:13.

[0074] Comparative Example 3

[0075] A method for preparing tea dregs cat litter, comprising the following steps:

[0076] (1) Mix tea dregs powder, copper chloride, lavender powder essence, water glass and composite powder evenly and pour into a disc granulator, spray deionized water to start granulation, sieve to obtain functional particles;

[0077] Take tea dregs powder 8 parts, copper chloride 0.3 parts, lavender powder essence 0.5 parts, water glass 4 parts, composite powder 65 parts, deionized water 12 parts by weight. The composite powder is mixed by modified zeolite, bentonite (calcium bentonite) and sodium bicarbonate in a mass ratio of 4:13:1.5.

[0078] (2) The composite powder is laid on a shaking table, the water glass is uniformly sprayed on the surface of the functional particles, then poured into the shaking table for rolling and shaking, and the functional protective particles are obtained after shaking and sieving.

[0079] (3) The functional protective particles are dried at 95℃ for 2.3h to form preformed particles composed of a functional layer and a protective layer, which are recorded as tea dregs cat litter, and the particle size is controlled to be 1.5-2mm and the water content is ≤10%.

[0080] In the present comparative example, the modified zeolite in Example 2 is used.

[0081] Comparative Example 4

[0082] The preparation method of the water-soluble slurry is as follows:

[0083] S21, corn starch and deionized water at 50℃ are stirred at a mass ratio of 1:20 to obtain a starch emulsion;

[0084] S22, soybean lecithin and deionized water at 90℃ are stirred at a mass ratio of 1:150 to obtain a phospholipid emulsion;

[0085] S23, glycerol 0.5%, sodium alginate 0.5%, starch emulsion 65% and phospholipid emulsion 34% are weighed and stirred uniformly, and the water-soluble slurry is prepared by incubating at 60℃ for 40min.

[0086] Quality detection

[0087] 1. The tea dregs cat litter in Examples 5-7 and Comparative Examples 1-3 is used as the test sample.

[0088] Water absorption rate test: the tea dregs cat litter sample is weighed and recorded as ; then the sample is immersed in deionized water for 5min, and the surface water is wiped off after taking out, and weighed and recorded as , the water absorption rate calculation formula is

[0089]

[0090] Dust test: the tea dregs cat litter sample is weighed and recorded as ; a vibrating screen with a mesh size of 0.2mm 0.2mm is used to screen for 10min at a frequency of 100 times / min, and the screened sample is weighed and recorded as , the loss rate calculation formula is

[0091]

[0092] The specific detection results are shown in Table 1.

[0093] Table 1 Water absorption rate and loss rate

[0094]

[0095] As shown in Table 1:

[0096] (1) Compared with Example 6, the tea dregs litter of Comparative Example 1 was not modified, and the tea dregs litter of Comparative Example 2 did not contain sodium bicarbonate, resulting in a low water absorption rate of the prepared tea dregs litter.

[0097] (2) Compared with Example 6, the tea dregs litter of Comparative Example 3 did not have a water-soluble film layer, resulting in a high loss rate, indicating that the dust in the tea dregs litter of Comparative Example 3 was easily scattered to the surrounding environment.

[0098] 2. The tea dregs litter in Example 6 and Comparative Examples 1-2 was used as the test sample.

[0099] Cohesion strength test: the tea dregs litter was placed in a container with a depth of more than 20 cm, 20 ml of 37℃ deionized water was added dropwise into the tea dregs litter within 5 s, and the coagulated litter was taken out after 1 min and weighed as , then the coagulated litter was dropped freely from a height of 50 cm, and the broken litter was collected and weighed as The cohesion strength was expressed by the collapse rate, and the collapse rate calculation formula was,

[0100]

[0101] Deodorization test: under the conditions of normal temperature and pressure (20℃, 1 atm), 1.5 mg / m 3 of ammonia gas 15L was circulated for 24 h through a large bubble absorption tube containing 100 g of tea dregs litter sample (previously sprayed with deionized water to remove the water-soluble film layer and dried), at a flow rate of 1 L / min, the treated ammonia gas was collected, and the ammonia gas concentration was determined by the Nessler's reagent spectrophotometric method, and the ammonia gas removal rate was calculated. Ammonia gas removal rate = (pre-treatment concentration - post-treatment concentration) / pre-treatment concentration 100%.

[0102] The specific test results are shown in Table 2.

[0103] Table 2 Collapse rate and ammonia water removal rate

[0104]

[0105] As shown in Table 2: compared with Example 6, the collapse rate of the tea dregs litter in Comparative Examples 1-2 was high, indicating that the cohesion strength was weak; the ammonia gas removal rate of the tea dregs litter in Comparative Examples 1-2 was low, indicating that the deodorization effect was poor.

[0106] 3. The water-soluble slurry in Example 4 and Comparative Example 4 was used as the test sample.

[0107] Tensile strength of water-soluble film: the sample was injected into a mold, dried at 50°C for 2h to obtain a water-soluble film with a thickness of 40mm, a width of 12mm, and a length of 100mm. The TA-XTplus texture analyzer was used as the testing instrument, and the height was calibrated before the test. The stretching distance was 20mm, the returning distance was 20mm, the pre-test speed was 2mm / s, the test speed was 1mm / s, the post-test speed was 10mm / s, and the trigger force was 5.0g. The tensile strength calculation formula was:

[0108]

[0109] The maximum tensile force at the moment of breaking, N. The specific test results are shown in Table 3.

[0110] Table 3 Tensile strength

[0111]

[0112] As shown in Table 3: compared with Example 4, the water-soluble slurry in Comparative Example 4 did not add cellulose nanofiber, resulting in a weak water-soluble film.

[0113] 4. The tea dreg litter in Example 6 and Comparative Example 3 was used as the object, the smell was smelled closely, and the evaluation was carried out. The specific evaluation results are shown in Table 4.

[0114] Table 4 Smell evaluation

[0115]

[0116] As shown in Table 4: the tea dreg litter in Example 6 can greatly reduce the emission of lavender powder fragrance due to the coating of the water-soluble film layer.

[0117] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.​​​

Claims

1. A tea slag cat litter, characterized in that Including functional layer, protective layer and water-soluble film layer; The functional layer raw materials are composed of tea residue powder, antibacterial agent, powder essence, binder, composite powder and deionized water; The raw material of the protective layer is composed of composite powder; The water-soluble film layer is formed by drying the water-soluble slurry; The composite powder comprises modified zeolite, bentonite and sodium bicarbonate; The preparation method of the water-soluble slurry is as follows: S21, stirring corn starch and deionized water at 50-55° C. in a mass ratio of 1:20 to obtain a starch emulsion; S22, stirring soybean lecithin and deionized water at 85-90° C. in a mass ratio of 1:150 to obtain a phospholipid emulsion; S23. Evenly stir the glycerol, sodium alginate, cellulose nanofibers, starch emulsion and phospholipid emulsion, and keep the mixture at 60-70° C. for 30-40 minutes to prepare a water-soluble slurry.

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

3. Tea slag cat litter according to claim 1, is characterized in that, In the composite powder, the mass ratio of modified zeolite, bentonite and sodium bicarbonate is (3-5): (12-15): (1-2).

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

5. The tea residue cat litter according to claim 1, wherein The preparation method of the modified zeolite is as follows: S11, soaking the zeolite in a hydrochloric acid solution for 5-10 hours, filtering, washing, and drying to obtain a pretreated zeolite; S12. Immersing the pretreated zeolite in a sodium chloride solution for 8-10 hours, filtering, washing, and drying to obtain a 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 In step S23, the water-soluble slurry is prepared by weight: 0.5% glycerol, 0.5% sodium alginate, 10% cellulose nanofibers, 60% starch emulsion, and 29% phospholipid emulsion.

8. The method for preparing the tea residue cat litter according to any one of claims 1 to 7, wherein The following steps are involved: (1) Tea dregs powder, antibacterial agent, powdered essence, binder and composite powder are uniformly mixed and poured into a disc granulator, deionized water is sprayed into the granulator to start granulation, and functional granules are obtained after sieving; (2) Lay the composite powder on a shaking table, spray the binder evenly on the surface of the functional particles, then pour it into the shaking table for rolling, shake and sieve to obtain functional protective particles; (3) Drying the functional protective particles to form preformed particles consisting of a functional layer and a protective layer; (4) The water-soluble slurry is evenly sprayed on the surface of the preformed particles, and after drying, a water-soluble film layer is formed on the surface of the preformed particles to prepare tea residue cat litter.

9. The method for preparing tea residue cat litter according to claim 8, wherein In the step (3), the tea slag cat litter is dried at 90-100° C. for 2-3 hours; in the step (4), the tea slag cat litter is dried at 50-55° C. for 1-2 hours. The particle size of the tea slag cat litter is 1.5-2 mm, and the water content is ≤10%.

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