Hydrophilic and oleophylic cat litter particles processed by seed shell carbon and shell carbon

Abstract

The invention discloses hydrophilic and oleophylic cat litter particles processed by seed shell carbon and shell carbon, and belongs to the field of cat litter particles, the cat litter particles comprise hydrophilic adsorption particles and oleophylic adsorption particles; the necessary basic materials of the hydrophilic adsorption particles comprise the following components in percentage by weight: 9-91.5% of seed shell carbon powder or shell carbon powder, 6-36% of guar gum, 0.5-9% of boric acid and 2-46% of water; the essential basic materials of the oleophylic adsorption particles comprise the following components in percentage by weight: 27-85% of seed shell carbon powder or shell carbon powder, 5-31% of polyisobutene and 10-42% of white mineral oil; the mass ratio of the hydrophilic adsorption particles to the oleophylic adsorption particles is (1: 1)-(5: 1); and the coverage rate of the carbon powder on the surface and inside of the particles is greater than 50%. Through independent formula design of hydrophilic and oleophylic double particles, directional efficient adsorption of aqueous liquid (such as urine) and oily liquid (such as sebum and greasy dirt) is achieved, and the problem that existing cat litter is single in function is solved.

Description

Technical Field

[0001] The invention relates to the field of cat litter, in particular to hydrophilic and lipophilic cat litter particles processed from seed shell charcoal and fruit shell charcoal. Background Art

[0002] Cat litter, as a pet cleaning product, primarily absorbs moisture, odor, and oil from pet excrement. Current mainstream products include bentonite cat litter, tofu litter (plant fiber cat litter), pine wood litter, and charcoal-based cat litter. Traditional bentonite cat litter relies on the physical adsorption of mineral particles. While it has good clumping properties, it causes severe dust pollution and has insufficient oil absorption capacity. Tofu litter, made from soybean dregs and starch, is environmentally friendly and biodegradable, but it easily pulverizes after absorbing water and has poor adsorption properties for grease and oil stains. Charcoal-based cat litter (such as rice husk charcoal and coconut shell charcoal powder) has a naturally porous structure and strong odor absorption capacity, but the raw charcoal powder has two major drawbacks: first, its light texture makes it easily float in the air or adhere to pet hair and floors, causing secondary pollution; second, after absorbing water or oil, it remains loose and cannot automatically clump, requiring repeated cleaning or replacement of the entire pot, making it inconvenient to use. In addition, existing cat litters usually only focus on a single function (hydrophilic or lipophilic), and it is difficult to efficiently treat urine (water-based stains) and sebum secretions and food residues (oily stains) at the same time. As a result, in actual applications, multiple cat litters need to be used in combination, increasing user costs.

[0003] The patent with publication number CN111492986A discloses a hydrophilic modified plant fiber cat litter material and a preparation method thereof, comprising the following steps: (1) pretreatment: crushing the plant fiber substrate, extruding and expanding the crushed plant fiber substrate, and alkalizing it by spraying or soaking it in alkali solution; (2) hydrophilic modification: adding water, an initiator, acrylic acid, and a crosslinking agent to the pretreated plant fiber substrate in sequence under heating and stirring conditions, continuing heating and stirring to react and obtain a reaction product; (3) post-treatment: squeezing and filtering the reaction product to remove excess water, and then drying and crushing it to obtain a hydrophilic modified plant fiber. The present invention hydrophilically modifies the selected plant fiber substrate by physical and chemical methods, thereby improving the water absorption performance of such materials, thereby preparing a new plant fiber cat litter material having better water absorption performance than pea dregs and soybean dregs;

[0004] Publication number: CN112005895A discloses a highly absorbent cat litter, which comprises the following components in parts by weight, mixed and then formed, cooled, crushed, and sieved: 50-80 parts of bagasse-modified highly absorbent resin, 10-20 parts of corn flour, 1-5 parts of natural plant binder, 1-5 parts of silicon dioxide, 2-8 parts of activated carbon, and water, wherein the amount of water accounts for 12-18% of the total mass of the mixed materials; the bagasse-modified highly absorbent resin is synthesized by solution graft polymerization using bagasse, kaolin, and acrylic acid as main raw materials, ammonium persulfate as initiator, and N,N'-methylenebisacrylamide as crosslinking agent after alkaline high-temperature pretreatment of bagasse. The cat litter of the present invention has low dust content, high water absorption performance, can effectively absorb odors, has excellent clumping performance, and has a natural sweet aroma of sugarcane, a pleasant odor, a comfortable feel on the feet, and is natural, environmentally friendly, and safe.

[0005] However, the above-mentioned prior art does not solve the following problems of cat litter:

[0006] Single function: lack of coordinated design of hydrophilic and lipophilic functions, unable to effectively treat both water-based and oily stains;

[0007] Loose structure: The carbon powder does not form an effective particle structure and remains in powder form after adsorption. It is easy to generate dust during cleaning and is difficult to completely remove.

[0008] Adhesion and dispersion problems: The original carbon powder has high surface activity and is easy to adhere to pets and the environment. When it does not absorb liquid, it is easy to spread with the air flow, causing blind spots in cleaning.

[0009] Unreasonable filler ratio: Some improvement plans fail to control the volume ratio of carbon powder to filler, resulting in insufficient carbon powder coverage and a significant decrease in adsorption performance.

[0010] To this end, this case now proposes a method of processing hydrophilic and lipophilic cat litter particles using seed shell charcoal and fruit shell charcoal to solve the above technical problems. Summary of the Invention

[0011] In order to overcome the above problems, the present invention aims to propose a method of processing hydrophilic and lipophilic cat litter particles using seed shell charcoal and fruit shell charcoal, aiming to solve the technical problems of existing cat litter particles such as single functionality, loose structure, easy adhesion and scattering.

[0012] To this end, the specific technical solutions adopted in the present invention are as follows:

[0013] According to one aspect of the present invention, there is provided a hydrophilic and lipophilic cat litter particle made from seed shell charcoal and fruit shell charcoal, the cat litter particle comprising hydrophilic adsorption particles and lipophilic adsorption particles;

[0014] The essential basic materials of the hydrophilic adsorption particles include, by weight percentage: 9-91.5% seed shell charcoal powder or fruit shell charcoal powder, 6-36% guar gum, 0.5-9% boric acid, and 2-46% water;

[0015] The essential basic materials of the lipophilic adsorption particles include, by weight percentage: 27-85% of seed shell carbon powder or fruit shell carbon powder, 5-31% of polyisobutylene, and 10-42% of white mineral oil;

[0016] The mass ratio of the hydrophilic adsorption particles to the lipophilic adsorption particles is 1:1-5:1;

[0017] The coverage of carbon powder on the surface and inside of the particles is greater than 50%.

[0018] Optionally, the hydrophilic adsorbent particles further include auxiliary materials, and the auxiliary materials are calculated based on 100% weight of the necessary basic materials:

[0019] Polyvinyl alcohol 0-9%, water-absorbing resin 0-9%, surfactant 0-3%, filler 0-450%, preservative 0-3%;

[0020] The filler has a specific gravity greater than that of the carbon powder and a volume less than that of the carbon powder.

[0021] Optionally, the lipophilic adsorbent particles further include auxiliary materials, and the auxiliary materials are calculated based on 100% weight of the necessary basic materials:

[0022] Liquid rubber 0-15%, polystyrene thermoplastic elastomer 0-15%, surfactant 0-3%, filler 0-450%, preservative 0-3%;

[0023] The filler has a specific gravity greater than that of the carbon powder and a volume less than that of the carbon powder.

[0024] Optionally, the seed shell charcoal powder includes one or more of rice husk charcoal powder, wheat husk charcoal powder, and peanut shell charcoal powder; the fruit shell charcoal powder includes one or more of coconut shell charcoal powder, walnut shell charcoal powder, and jujube shell charcoal powder;

[0025] The specific gravity of the carbon powder is 0.1-0.3 g / cm 3 , porosity>75%, with the characteristics of light weight, fast water and oil absorption rate and strong odor gas adsorption capacity.

[0026] Optionally, the filler includes one or more of talc, silicon dioxide, and rice husk powder;

[0027] Among them, the specific gravity of talcum powder is 2.7g / cm 3 , the specific gravity of silicon dioxide is 2.3g / cm 3 , rice husk powder specific gravity 0.4g / cm 3The amount of filler added satisfies: the volume occupied in the particles is less than the volume of carbon powder, and the weight can exceed the weight of carbon powder.

[0028] Optionally, the preparation method of the hydrophilic adsorption particles includes:

[0029] Guar gum and boric acid are dissolved in water to form a binder, which is then mixed with seed shell carbon powder or fruit shell carbon powder to form granules. Granules with a moisture content of ≤10% are obtained after drying. The drying temperature is 70-160° C. for 4-20 minutes, and the granulation temperature is 10-80° C. for 10-30 minutes.

[0030] Optionally, the preparation method of the lipophilic adsorption particles includes:

[0031] Polyisobutylene and white mineral oil are heated to 100-180° C. to form a mixed matrix, which is then mixed with seed shell carbon powder or fruit shell carbon powder to form granules. After cooling, granules with a non-sticky surface are obtained. Liquid rubber or polystyrene thermoplastic elastomer can be added during the granulation process to adjust the toughness.

[0032] Optionally, the cat litter particles have a cross-sectional diameter of 1-5 mm and are spherical or elongated. The carbon powder on the surface forms a porous adsorption layer, and the friction coefficient between the particles is ≥0.4, ensuring that the particles automatically stick together after absorbing water or oil, which is convenient for overall cleaning. The water absorption rate of the hydrophilic adsorption particles is ≥3 times their own weight, and the volume expansion rate after liquid absorption is ≤60%; the oil absorption rate of the lipophilic adsorption particles is ≥3 times their own weight, and the particle structure remains intact after oil absorption without liquid leakage.

[0033] Optionally, the carbon powder itself has insect and bacteria proofing functions, so the preservative is not a necessary added material.

[0034] Compared with the existing technology, this application has the following beneficial effects:

[0035] Through the independent formula design of hydrophilic and lipophilic dual particles, directional and efficient adsorption of aqueous liquids (such as urine) and oily liquids (such as sebum and oil stains) is achieved, solving the problem of the single function of existing cat litter.

[0036] By controlling the volume of the carbon powder to be larger than the volume of the filler and the coverage rate to be greater than 50%, the carbon powder is mainly present on the inner and outer surfaces of the particles, giving full play to the high water / oil absorption rate (water absorption rate ≤ 3 seconds / gram, oil absorption rate ≤ 3.2 seconds / gram) and odor gas adsorption capacity of the porous structure of the carbon powder, and the adsorption efficiency is improved compared to traditional carbon powder cat litter.

[0037] Through the bonding effect of the guar gum-boric acid bonding system (hydrophilic particles) and the polyisobutylene-white mineral oil matrix (lipophilic particles), the particles automatically agglomerate after absorbing liquid, making it easy to remove and clean the entire thing, solving the pain point of traditional charcoal powder being loose and difficult to clean.

[0038] Through the particle forming process and the surface carbon powder coating structure, the particles are not easy to float and do not adhere to the skin and floor when no liquid is absorbed, thus avoiding secondary pollution.

[0039] Through the selective addition of auxiliary materials (polyvinyl alcohol, liquid rubber, etc.), the bonding strength, water / oil absorption rate and oil retention stability of the particles can be adjusted as needed. For example, the water absorption rate of highly water-absorbent particles can reach 4.8 times, and the 24-hour oil retention rate of highly oil-retaining particles can reach 98%, meeting the needs of different usage scenarios.

[0040] By utilizing the insect and antibacterial properties of charcoal powder, the addition of preservatives is unnecessary, reducing production costs while avoiding the potential impact of chemical agents on pet health, making the product safer and more environmentally friendly.

[0041] By limiting the filler specific gravity to greater than carbon powder and the volume to less than carbon powder, the effective adsorption area of the carbon powder is not reduced while the weight of the particles is increased, ensuring that the particles are light but not prone to floating, while taking into account both the feel of use and the ease of cleaning. DETAILED DESCRIPTION

[0042] In order to help those skilled in the art better understand the present invention, the following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0043] Example 1

[0044] According to an embodiment of the present invention, a hydrophilic and lipophilic cat litter particle made from seed shell charcoal and fruit shell charcoal is provided, wherein the cat litter particle comprises hydrophilic adsorption particles and lipophilic adsorption particles;

[0045] The essential basic materials of the hydrophilic adsorption particles include, by weight percentage: 9-91.5% seed shell charcoal powder or fruit shell charcoal powder, 6-36% guar gum, 0.5-9% boric acid, and 2-46% water;

[0046] The essential basic materials of the lipophilic adsorption particles include, by weight percentage: 27-85% of seed shell carbon powder or fruit shell carbon powder, 5-31% of polyisobutylene, and 10-42% of white mineral oil;

[0047] The mass ratio of the hydrophilic adsorption particles to the lipophilic adsorption particles is 1:1-5:1;

[0048] The coverage of carbon powder on the surface and inside of the particles is greater than 50%.

[0049] The hydrophilic adsorbent particles further include auxiliary materials, which are calculated based on 100% weight of the essential basic materials:

[0050] Polyvinyl alcohol 0-9%, water-absorbing resin 0-9%, surfactant 0-3%, filler 0-450%, preservative 0-3%;

[0051] The filler has a specific gravity greater than that of the carbon powder and a volume less than that of the carbon powder.

[0052] The lipophilic adsorbent particles further comprise auxiliary materials, which are calculated based on 100% weight of the essential basic materials:

[0053] Liquid rubber 0-15%, polystyrene thermoplastic elastomer 0-15%, surfactant 0-3%, filler 0-450%, preservative 0-3%;

[0054] The filler has a specific gravity greater than that of the carbon powder and a volume less than that of the carbon powder.

[0055] The seed shell charcoal powder includes one or more of rice husk charcoal powder, wheat husk charcoal powder, and peanut shell charcoal powder; the fruit shell charcoal powder includes one or more of coconut shell charcoal powder, walnut shell charcoal powder, and jujube shell charcoal powder;

[0056] The specific gravity of the carbon powder is 0.1-0.3 g / cm 3 , porosity>75%, with the characteristics of light weight, fast water and oil absorption rate and strong odor gas adsorption capacity.

[0057] The filler includes one or more of talc, silicon dioxide, and rice husk powder;

[0058] Among them, the specific gravity of talcum powder is 2.7g / cm 3 , the specific gravity of silicon dioxide is 2.3g / cm 3 , rice husk powder specific gravity 0.4g / cm 3 The amount of filler added satisfies: the volume occupied in the particles is less than the volume of carbon powder, and the weight can exceed the weight of carbon powder.

[0059] The preparation method of the hydrophilic adsorption particles comprises:

[0060] Guar gum and boric acid are dissolved in water to form a binder, which is then mixed with seed shell carbon powder or fruit shell carbon powder to form granules. Granules with a moisture content of ≤10% are obtained after drying. The drying temperature is 70-160° C. for 4-20 minutes, and the granulation temperature is 10-80° C. for 10-30 minutes.

[0061] The preparation method of the lipophilic adsorption particles comprises:

[0062] Polyisobutylene and white mineral oil are heated to 100-180° C. to form a mixed matrix, which is then mixed with seed shell carbon powder or fruit shell carbon powder to form granules. After cooling, granules with a non-sticky surface are obtained. Liquid rubber or polystyrene thermoplastic elastomer can be added during the granulation process to adjust the toughness.

[0063] The cat litter particles have a cross-sectional diameter of 1-5 mm and are spherical or quasi-long. Carbon powder on the surface forms a porous adsorption layer, and the friction coefficient between the particles is ≥0.4, ensuring that the particles automatically stick together after absorbing water or oil, making it easy to clean the whole. The water absorption rate of the hydrophilic adsorption particles is ≥3 times their own weight, and the volume expansion rate after absorbing liquid is ≤60%. The oil absorption rate of the lipophilic adsorption particles is ≥3 times their own weight. After oil absorption, the particle structure remains intact and there is no liquid leakage.

[0064] Example 2

[0065] Basic hydrophilic particles (without auxiliary materials)

[0066] Formula (weight percentage):

[0067] Rice husk charcoal powder 60%, guar gum 20%, boric acid 2%, water 18% (without auxiliary materials)

[0068] Preparation steps:

[0069] Dissolve guar gum (20 g) and boric acid (2 g) in 60°C warm water (18 g) and stir for 30 minutes until completely dissolved to form a transparent adhesive;

[0070] Add rice husk charcoal powder (60 g) and granulate in a granulator at 70°C and 100 rpm to control the particle size to 3-4 mm;

[0071] Place in an oven and dry at 120°C for 15 minutes until the moisture content is ≤8%, obtaining particles with a rough surface.

[0072] Performance parameters:

[0073] The water absorption rate is 3.2 times, the water absorption rate is 2.3 seconds / gram, the agglomeration friction coefficient is 0.45, and the dust rate is 1.2%.

[0074] Example 3

[0075] Highly absorbent hydrophilic particles (with added absorbent resin)

[0076] Formula (weight percentage, based on 100% basic material):

[0077] Basic materials: wheat husk charcoal powder 50%, guar gum 18%, boric acid 2%, water 30%;

[0078] Auxiliary materials: 8% water-absorbing resin, 200% talcum powder (70% of the volume of carbon powder).

[0079] Preparation steps:

[0080] The binder was prepared as in Example 1, with the addition of water-absorbing resin (8 g) dissolved in warm water;

[0081] Carbon powder and talc (200 g) were premixed and then added with binder. The granulation temperature was 65 ° C and the time was 20 minutes.

[0082] Dry at 80℃ for 20 minutes, moisture content ≤7%.

[0083] Performance parameters:

[0084] The water absorption rate is 4.8 times (37% higher than that of Example 1), the water absorption rate is 2.8 seconds / gram, the agglomeration friction coefficient is 0.48, and the dust rate is 1.5%.

[0085] Example 4

[0086] Highly adhesive hydrophilic particles (added with polyvinyl alcohol)

[0087] Formula (weight percentage, based on 100% basic material):

[0088] Basic materials: peanut shell charcoal powder 70%, guar gum 25%, boric acid 3%, water 12%;

[0089] Auxiliary materials: polyvinyl alcohol 5%, rice husk powder 50% (40% of the volume of carbon powder).

[0090] Preparation steps:

[0091] Add polyvinyl alcohol (5 g) to the binder and heat to 70°C to dissolve;

[0092] The charcoal powder and rice husk powder (50 g) were mixed and then a binder was added. The granulator was rotated at 150 rpm to form 2-3 mm particles.

[0093] Dry at 100℃ for 15 minutes, moisture content ≤6%.

[0094] Performance parameters:

[0095] The water absorption rate is 3.6 times, the water absorption rate is 2.5 seconds / gram (increased by 8%), the agglomeration friction coefficient is 0.52 (increased by 16%), and the dust rate is 0.8% (reduced by 33%).

[0096] The above-mentioned embodiment 2, embodiment 3, and embodiment 4 are embodiments of hydrophilic adsorption cat litter particles. The specific parameter comparison table is shown in Table 1:

[0097] Table 1: Comparison table of specific parameters of embodiment 1, embodiment 2 and embodiment 3

[0098]

[0099]

[0100] Example 5

[0101] Basic lipophilic particles (without auxiliary materials)

[0102] Formula (weight percentage):

[0103] Coconut shell charcoal powder 50%, polyisobutylene 20%, white mineral oil 30% (without auxiliary materials)

[0104] Preparation steps:

[0105] Heat polyisobutylene (20 g) and white mineral oil (30 g) to 100°C to melt, and stir for 15 minutes until homogeneous;

[0106] Coconut shell charcoal powder (50 g) was added, mixed in a kneader at 50°C for 20 minutes, and extruded into granules;

[0107] Cool at room temperature for 1 hour to form 4-5mm non-sticky particles.

[0108] Performance parameters:

[0109] The oil absorption rate is 3.5 times, the oil retention rate (24 hours) is 95%, the compressive strength is 0.9MPa, and the oil adsorption rate is 3.0 seconds / gram.

[0110] Example 6

[0111] High oil-holding lipophilic particles (added with polystyrene thermoplastic elastomer)

[0112] Formula (weight percentage, based on 100% basic material):

[0113] Basic materials: walnut shell carbon powder 40%, polyisobutylene 15%, white mineral oil 45%;

[0114] Auxiliary materials: polystyrene thermoplastic elastomer 10%, silicon dioxide 200% (60% by volume of carbon powder).

[0115] Preparation steps:

[0116] Elastomer (10 g) was added to the mixed matrix and heated to 180 °C to dissolve;

[0117] Carbon powder and silica (200 g) were premixed and then added to the matrix, granulated and cooled at a rate of 5 °C / min;

[0118] Performance parameters:

[0119] The oil absorption rate is 4.2 times (increased by 20%), the oil holding rate is 98% (increased by 3%), the compressive strength is 1.1MPa (increased by 22%), and the oil adsorption rate is 2.7 seconds / gram.

[0120] Example 7

[0121] High toughness lipophilic particles (added with liquid rubber)

[0122] Formula (weight percentage, based on 100% basic material):

[0123] Basic materials: jujube shell carbon powder 60%, polyisobutylene 25%, white mineral oil 15%;

[0124] Auxiliary materials: liquid rubber 12%, talcum powder 100% (50% of the volume of carbon powder).

[0125] Preparation steps:

[0126] Liquid rubber (12 g) was mixed with the matrix, heated to 60 °C and stirred evenly;

[0127] After low-temperature granulation (40°C), the product was cooled in a freezer at a rate of 10°C / min;

[0128] Performance parameters:

[0129] The oil absorption rate is 3.2 times, the oil holding rate is 96%, the compressive strength is 1.0MPa, and the number of times the particles can withstand falling (1 meter high) is ≥10 times (without breaking).

[0130] The above-mentioned embodiment 5, embodiment 6, and embodiment 7 are embodiments of lipophilic adsorption cat litter particles. The specific parameter comparison table is shown in Table 2:

[0131] Table 2: Comparison of specific parameters of Example 5, Example 6, and Example 7

[0132] project Example 5 Example 6 Example 7 Types of carbon powder coconut shell charcoal Walnut shell charcoal Jujube shell charcoal Auxiliary materials none Elastomer + silica Liquid rubber + talcum powder Oil absorption rate (times) 3.5 4.2 3.2 Oil retention rate (24 hours) 95％ 98％ 96％ Compressive strength (MPa) 0.9 1.1 1.0 Surface stickiness none none none

[0133] Although the present invention has been disclosed above with reference to preferred embodiments, the embodiments are merely examples for the purpose of illustration and are not intended to limit the present invention. Those skilled in the art may make various modifications and alterations without departing from the spirit and scope of the present invention. The scope of protection claimed by the present invention shall be subject to the claims.

Claims

1. A seed shell charcoal and fruit shell charcoal processed hydrophilic and lipophilic cat litter granules, characterized in that: The cat litter particles include hydrophilic adsorption particles and lipophilic adsorption particles; The essential basic materials of the hydrophilic adsorption particles include, by weight percentage: 9-91.5% seed shell charcoal powder or fruit shell charcoal powder, 6-36% guar gum, 0.5-9% boric acid, and 2-46% water; The essential basic materials of the lipophilic adsorption particles include, by weight percentage: 27-85% of seed shell carbon powder or fruit shell carbon powder, 5-31% of polyisobutylene, and 10-42% of white mineral oil; The mass ratio of the hydrophilic adsorption particles to the lipophilic adsorption particles is 1:1-5:1; The coverage of carbon powder on the surface and inside of the particles is greater than 50%.

2. A seed shell charcoal and fruit shell charcoal processed hydrophilic and lipophilic cat litter particles according to claim 1, characterized in that, The hydrophilic adsorbent particles further include auxiliary materials, which are calculated based on 100% weight of the necessary basic materials: Polyvinyl alcohol 0-9%, water-absorbing resin 0-9%, surfactant 0-3%, filler 0-450%, preservative 0-3%; The filler has a specific gravity greater than that of the carbon powder and a volume less than that of the carbon powder.

3. A seed shell charcoal and fruit shell charcoal processed hydrophilic and lipophilic cat litter particles according to claim 1, characterized in that, The lipophilic adsorption particles further include auxiliary materials, which are calculated based on 100% weight of the necessary basic materials: Liquid rubber 0-15%, polystyrene thermoplastic elastomer 0-15%, surfactant 0-3%, filler 0-450%, preservative 0-3%; The filler has a specific gravity greater than that of the carbon powder and a volume less than that of the carbon powder.

4. The hydrophilic and lipophilic cat litter particles processed from seed shell charcoal and fruit shell charcoal according to claim 1, characterized in that: The seed shell charcoal powder includes one or more of rice husk charcoal powder, wheat husk charcoal powder, and peanut shell charcoal powder; the fruit shell charcoal powder includes one or more of coconut shell charcoal powder, walnut shell charcoal powder, and jujube shell charcoal powder; The specific gravity of the carbon powder is 0.1-0.3 g / cm 3 , porosity > 75%.

5. A kind of seed shell charcoal and fruit shell charcoal processed hydrophilic and lipophilic cat litter particles according to claim 2 or 3, characterized in that, The filler includes one or more of talc, silicon dioxide, and rice husk powder; Among them, the specific gravity of talcum powder is 2.7g / cm 3 , the specific gravity of silicon dioxide is 2.3g / cm 3 , rice husk powder specific gravity 0.4g / cm 3 The amount of filler added satisfies: the volume occupied in the particles is less than the volume of carbon powder, and the weight can exceed the weight of carbon powder.

6. The hydrophilic and lipophilic cat litter particles processed from seed shell charcoal and fruit shell charcoal according to claim 1, characterized in that: The preparation method of the hydrophilic adsorption particles comprises: Guar gum and boric acid are dissolved in water to form a binder, which is then mixed with seed shell carbon powder or fruit shell carbon powder to form granules. Granules with a moisture content of ≤10% are obtained after drying. The drying temperature is 70-160° C. for 4-20 minutes, and the granulation temperature is 10-80° C. for 10-30 minutes.

7. The hydrophilic and lipophilic cat litter particles processed from seed shell charcoal and fruit shell charcoal according to claim 1, characterized in that: The preparation method of the lipophilic adsorption particles comprises: Polyisobutylene and white mineral oil are heated to 100-180° C. to form a mixed matrix, which is then mixed with seed shell carbon powder or fruit shell carbon powder to form granules. After cooling, granules with a non-sticky surface are obtained. Liquid rubber or polystyrene thermoplastic elastomer can be added during the granulation process to adjust the toughness.

8. The hydrophilic and lipophilic cat litter particles processed from seed shell charcoal and fruit shell charcoal according to claim 1, characterized in that: The cat litter particles have a cross-sectional diameter of 1-5 mm and are spherical or elongated. Carbon powder on the surface forms a porous adsorption layer. The friction coefficient between the particles is ≥0.

4. The water absorption rate of the hydrophilic adsorption particles is ≥3 times their own weight, and the volume expansion rate after liquid absorption is ≤60%. The oil absorption rate of the lipophilic adsorption particles is ≥3 times their own weight. After oil absorption, the particle structure remains intact and no liquid leaks out.

9. The hydrophilic and lipophilic cat litter particles processed from seed shell charcoal and fruit shell charcoal according to claim 1, characterized in that: The carbon powder itself has the function of preventing insects and bacteria, so the preservative is not a necessary added material.

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