A modified mixed cat litter comprising zeolite bentonite and a method for preparing the same

Abstract

The application discloses modified mixed cat litter containing zeolite bentonite and a preparation method thereof, and belongs to the technical field of modified mixed cat litter preparation.The modified mixed cat litter containing zeolite bentonite is composed of the following components in parts by weight: 30-50 parts of modified cat litter, 10-20 parts of bentonite cat litter, and 0.1-0.3 parts of antibacterial agent, wherein the modified cat litter is prepared from corn straw, acrylic acid, zeolite, bean dregs, starch and polyacrylamide solution, and the antibacterial agent is prepared from ammonia water, methyl acrylate, sodium polysulfide, isopropylamine and sulfuryl chloride.The modified mixed cat litter prepared by the method has excellent water absorption rate, ammonia removal effect and antibacterial property.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of modified mixed cat litter preparation, and particularly relates to a modified mixed cat litter containing zeolite bentonite and a preparation method thereof. BACKGROUND

[0002] In recent years, with the rapid increase in the number of pet cats, the demand for cat litter in the pet market has also increased significantly. As an indispensable part of the daily life of pet cats, cat litter not only needs to have basic water absorption and clumping functions, but also needs to have good deodorizing performance to ensure the hygiene and comfort of the pet environment. However, the common cat litter products on the market have their own advantages and disadvantages. For example, silica gel cat litter is easy to generate heat after absorbing water, affecting the living environment of pets; pine cat litter is light and comfortable but has limited ammonia removal effect and is expensive; traditional bentonite cat litter is cheap, has good water absorption, but has poor clumping and ammonia removal effect, and easily produces dust, affecting the health of pets and owners. Through scientific proportioning and modification, combined with the excellent adsorption performance of zeolite and the good water absorption and clumping performance of bentonite, a new type of cat litter with overall upgraded performance is developed. As a kind of porous mineral, zeolite has strong adsorption and ion exchange capacity due to its unique structure, which can effectively adsorb and remove the ammonia smell and other odor substances in urine, thereby significantly improving the deodorizing effect of cat litter. At the same time, bentonite provides stable wrapping and cleaning convenience for cat litter due to its high water absorption and good clumping performance.

[0003] Patent CN 113439668 B discloses a deodorizing mixed cat litter and a preparation method thereof. The cat litter is prepared by mixing 3-7 parts of tofu cat litter, 3-7 parts of bentonite cat litter, and 3-7 parts of deodorizing zeolite cat litter. The cat litter prepared by the method has good clumping, good water absorption, good water-soluble disintegration, strong odor masking and deodorizing ability, and less dust. However, the water absorption rate and antibacterial performance of the cat litter prepared by the method still have room for improvement. SUMMARY

[0004] The present application aims to provide a modified mixed cat litter containing zeolite bentonite and a preparation method thereof, to solve the technical problem of poor water absorption rate and antibacterial performance of cat litter in the prior art.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] The present application provides a modified mixed cat litter containing zeolite bentonite, which is composed of the following ingredients by weight: 30-50 parts of modified cat litter, 10-20 parts of bentonite cat litter, and 0.1-0.3 parts of antibacterial agent. The modified cat litter is prepared from corn straw, acrylic acid, zeolite, bean dregs, starch, and polyacrylamide solution. The antibacterial agent is prepared from ammonia water, methyl acrylate, sodium polysulfide, isopropylamine, and sulfuryl chloride.

[0007] Preferably, the method for preparing the modified cat litter includes the following steps:

[0008] Q1: Wash, dry, crush, and sieve the corn stalks to obtain corn stalk powder. Heat and mix the corn stalk powder with nitric acid solution, filter, wash, and dry to obtain corn stalk cellulose.

[0009] Q2: Add corn stalk cellulose to a container, then add acrylic acid, potassium persulfate and N,N-methylenebisacrylamide, purge with nitrogen, heat and stir to react, after the reaction is complete, cool, dry and grind to obtain water-absorbing polymer;

[0010] Q3: Zeolite, soybean residue, starch, water-absorbing polymer, citric acid, calcium carbonate and talc are pulverized and mixed to obtain a mixed powder. Polyacrylamide and distilled water are mixed to prepare a polyacrylamide solution. The mixed powder is added to a fluidized bed spray granulator, and the polyacrylamide solution is added to the two-fluid nozzle of the fluidized bed spray granulator. The mixture is mixed, collided, wetted and granulated to obtain modified cat litter.

[0011] In the above process, corn stalk cellulose is first extracted from corn stalks, and then polyacrylic acid is grafted onto it through solution polymerization to obtain a water-absorbing polymer. The water-absorbing polymer is then added to the cat litter raw material, and polyacrylamide solution is used as a binder. Under the action of the binder, the mixed powder forms a clump-shaped modified cat litter.

[0012] Preferably, in Q1, the drying temperature is 70-80℃, the time is 10-12h, the sieve particle size is 40-60 mesh, the ratio of corn stalk powder to nitric acid solution is (1-3)g:(30-90)mL, the volume fraction of nitric acid solution is 10vt%, the heating and mixing reaction temperature is 90-100℃, and the reaction time is 4-6h; in Q2, the container contains a thermometer, a nitrogen pipeline and a reflux condenser, the mass ratio of corn stalk cellulose, acrylic acid, potassium persulfate and N,N-methylenebisacrylamide is (8-12):(1-2):(0.038-0.076):(0.02-0.04), the heating and stirring reaction temperature is 60-70℃, the stirring speed is 500-600rpm, and the reaction time is 3-5h.

[0013] Preferably, in Q3, the mass ratio of zeolite, soybean residue, starch, water-absorbing polymer, citric acid, calcium carbonate and talc is (30-50):(18-24):(10-14):(8-12):(2-6):(1-5):(1-3), the ratio of polyacrylamide to distilled water is (1-2)g:(400-700)mL, and the ratio of mixed powder to polyacrylamide solution is (20-40)g:(3-6)mL.

[0014] Preferably, the method for preparing the antibacterial agent includes the following steps:

[0015] S1: After stirring ammonia and methyl acrylate at low temperature, slowly add sodium polysulfide solution dropwise. After the addition is complete, heat up and continue stirring to react. Then let stand and separate the layers. Remove the water layer and add sodium sulfite solution to the oil layer. Heat to continue the reaction. After the reaction is complete, extract and wash with water to obtain an oily liquid.

[0016] S2: Add oily liquid, distilled water and concentrated sulfuric acid to a container in sequence. Under low temperature conditions, slowly add isopropylamine solution. After the addition is complete, continue the reaction. After the reaction is complete, let stand, precipitate, filter, dry and recrystallize to obtain a white solid.

[0017] S3: Mix ethyl acetate and a white solid, and slowly add sulfuryl chloride dropwise under low temperature conditions, controlling the dropwise addition time. After the addition is complete, continue the reaction, then raise the temperature to react. After the reaction is complete, add distilled water and shake, let stand, remove the water layer, dry, filter, and rotary evaporate to obtain the antibacterial agent.

[0018] The synthesis reaction formula for the antibacterial agent in the above process is as follows:

[0019]

[0020] The mass spectrometry analysis results were as follows: m / z: 143.04 (100.0%), 144.04 (7.7%), 145.04 (4.8%).

[0021] Preferably, in step S1, the ratio of ammonia, methyl acrylate, and sodium polysulfide solution is (1.2-2.4)g:(25.8-51.6)g:(8-12)mL, the mass fraction of sodium polysulfide solution is 30wt%, the low-temperature stirring temperature is 0-5℃, the temperature is raised to 25-30℃, the stirring reaction time is continued for 8-10h, the heating reaction temperature is continued for 50-55℃, and the reaction time is 4-5h.

[0022] Preferably, in step S2, the ratio of oily liquid, distilled water, concentrated sulfuric acid, and isopropylamine solution is (11.9-15.47)g:(30-39)mL:(0.2-0.26)g:(29.5-38.35)mL, the low temperature is 0-5℃, the volume fraction of isopropylamine solution is 40vt%, and the reaction time is 14-16h.

[0023] Preferably, in S3, the ratio of ethyl acetate, white solid, thiocyanate chloride, and distilled water is (60-72) mL : (13.1-15.72) g : (20-24) mL : (10-12) mL, the low temperature condition is 2-5℃, the dropping time is controlled at 1-1.2 h, the reaction time is 4-6 h, the temperature is raised to 28-32℃, the reaction time is 3-5 h, and the shaking time is 5-10 min.

[0024] Preferably, the method for preparing the modified mixed cat litter containing zeolite bentonite includes the following steps:

[0025] Step (1): Add the modified cat litter, bentonite cat litter and antibacterial agent to different vibrating screens respectively, and guide them to the same material bucket at the bottom of the vibrating screens;

[0026] Step (2): Adjust the frequency of the vibrating screen to make the modified cat litter, bentonite cat litter and antibacterial agent mix evenly. The mixture in the bucket is the modified mixed cat litter containing zeolite bentonite.

[0027] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0028] 1. This invention first uses corn stalk cellulose and acrylic acid as raw materials to prepare a water-absorbing polymer, which is then added to modified cat litter to effectively improve the water absorption rate of the modified mixed cat litter. Subsequently, an antibacterial agent is prepared using methyl acrylate, sodium polysulfide, isopropylamine, and sulfuryl chloride as raw materials, which is then added to the modified mixed cat litter to effectively improve its antibacterial properties. Furthermore, the zeolite and bentonite contained in the modified mixed cat litter can effectively absorb ammonia, protecting the health of pets.

[0029] 2. This invention uses corn stalk cellulose and acrylic acid as raw materials to prepare a water-absorbing polymer. This polymer contains a large number of hydrophilic groups, allowing it to rapidly swell in water and absorb a large amount of moisture. Furthermore, the amide groups in the added polyacrylamide can form hydrogen bonds with water molecules, giving it excellent water absorption and retention properties. When cat litter comes into contact with urine, the polyacrylamide can quickly absorb and lock in moisture, preventing it from spreading to the litter surface and keeping the litter clean and dry. Simultaneously, as a binder, polyacrylamide can tightly bind the litter particles together through a mesh structure, reducing dust generated during use. This not only improves the user experience but also helps maintain environmental hygiene. Additionally, the water absorption of polyacrylamide causes the litter to clump quickly after absorbing water, and the clumps are compact and do not easily disperse, reducing the tediousness of cleaning.

[0030] 3. This invention uses methyl acrylate, sodium polysulfide, isopropylamine, and sulfuryl chloride as raw materials to prepare an antibacterial agent. Adding this agent to modified mixed cat litter can effectively improve the antibacterial properties of the cat litter. The antibacterial agent can gradually enter the cell by binding with anions on the surface of microbial cell membranes, and can also react with sulfhydryl groups on the cell surface, thereby destroying the cell membrane structure and causing the death of microorganisms. In addition, the antibacterial agent can reduce the activity of various metabolic enzymes in microbial cells, hinder the respiration and other metabolic processes of microorganisms, causing microorganisms to be unable to grow and reproduce normally. Adding it to cat litter can effectively increase its antibacterial properties. Detailed Implementation

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1

[0033] This embodiment discloses a method for preparing modified cat litter, including the following steps:

[0034] Q1: Wash the corn stalks, dry them at 70℃ for 12 hours, crush them, and pass them through a 40-mesh sieve to obtain corn stalk powder. Heat and mix 2g of corn stalk powder with 60mL of 10vt% nitric acid solution and react them at 90℃ for 4 hours. Filter, wash, and dry to obtain corn stalk cellulose.

[0035] Q2: Add 10g of corn stalk cellulose to a container containing a thermometer, a nitrogen line and a reflux condenser, then add 1.5g of acrylic acid, 0.057g of potassium persulfate and 0.03g of N,N-methylenebisacrylamide, purge with nitrogen, stir at 70℃ and 600rpm for 5h. After the reaction is complete, cool, dry and grind to obtain the water-absorbing polymer.

[0036] Q3: 40g zeolite, 21g soybean residue, 12g starch, 10g water-absorbing polymer, 4g citric acid, 3g calcium carbonate and 2g talc are pulverized and mixed to obtain a mixed powder. 1.5g polyacrylamide and 550mL distilled water are mixed to prepare a polyacrylamide solution. 30g of the mixed powder is added to a fluidized bed spray granulator, and 4.5mL of the polyacrylamide solution is added to the two-fluid nozzle of the fluidized bed spray granulator. The mixture is mixed, collided, wetted and granulated to obtain modified cat litter.

[0037] This embodiment discloses a method for preparing an antibacterial agent, including the following steps:

[0038] S1: After stirring 1.8g of ammonia water and 38.7g of methyl acrylate at 3℃, slowly add 10mL of 30wt% sodium polysulfide solution dropwise. After the addition is complete, raise the temperature to 25℃ and continue stirring for 10h. Then, allow the mixture to stand and separate the layers, remove the aqueous layer, add sodium sulfite solution to the oil layer, and heat to 55℃ to continue the reaction for 5h.

[0039] After the reaction was complete, the sample was extracted and washed with water to obtain an oily liquid.

[0040] S2: 13.69 g of oily liquid, 34.5 mL of distilled water and 0.23 g of concentrated sulfuric acid were added to a container in sequence. At 2 °C, 33.93 mL of isopropylamine solution with a volume fraction of 40 vt% was slowly added dropwise. After the addition was completed, the reaction was continued for 14 h. After the reaction was completed, the mixture was allowed to stand, precipitated, filtered, dried and recrystallized to obtain a white solid.

[0041] S3: Mix 66 mL of ethyl acetate and 14.41 g of white solid. At 5 °C, slowly add 22 mL of thiocyanate chloride, controlling the addition time to 1 h. After the addition is complete, continue the reaction for 6 h, then react at 32 °C for 5 h. After the reaction is complete, add 11 mL of distilled water and shake for 10 min. Let stand, remove the water layer, dry, filter, and rotary evaporate to obtain the antibacterial agent.

[0042] This embodiment discloses a modified mixed cat litter containing zeolite bentonite, which is composed of the following components in parts by weight: 40 parts modified cat litter, 15 parts bentonite cat litter, and 0.2 parts antibacterial agent.

[0043] This embodiment discloses a method for preparing modified mixed cat litter containing zeolite bentonite, comprising the following steps:

[0044] Step (1): Add the modified cat litter, bentonite cat litter and antibacterial agent to different vibrating screens respectively, and guide them to the same material bucket at the bottom of the vibrating screens;

[0045] Step (2): Adjust the frequency of the vibrating screen to make the modified cat litter, bentonite cat litter and antibacterial agent mix evenly. The mixture in the bucket is the modified mixed cat litter containing zeolite bentonite.

[0046] Example 2

[0047] This embodiment discloses a method for preparing modified cat litter, including the following steps:

[0048] Q1: Wash the corn stalks, dry them at 70℃ for 12 hours, crush them, and pass them through a 40-mesh sieve to obtain corn stalk powder. Heat and mix 1g of corn stalk powder with 30mL of 10vt% nitric acid solution and react at 90℃ for 4 hours. Filter, wash, and dry to obtain corn stalk cellulose.

[0049] Q2: Add 8g of corn stalk cellulose to a container containing a thermometer, a nitrogen line and a reflux condenser, then add 1g of acrylic acid, 0.038g of potassium persulfate and 0.02g of N,N-methylenebisacrylamide, purge with nitrogen, stir at 70℃ and 600rpm for 5h. After the reaction is complete, cool, dry and grind to obtain the water-absorbing polymer.

[0050] Q3: 30g zeolite, 18g soybean residue, 10g starch, 8g water-absorbing polymer, 2g citric acid, 1g calcium carbonate and 1g talc are pulverized and mixed to obtain a mixed powder. 1g polyacrylamide and 400mL distilled water are mixed to prepare a polyacrylamide solution. 20g of the mixed powder is added to a fluidized bed spray granulator, and 3mL of the polyacrylamide solution is added to the two-fluid nozzle of the fluidized bed spray granulator. The mixture is mixed, collided, wetted and granulated to obtain modified cat litter.

[0051] This embodiment discloses a method for preparing an antibacterial agent, including the following steps:

[0052] S1: 1.2g of ammonia and 25.8g of methyl acrylate were stirred at 3°C, and 8mL of sodium polysulfide solution with a mass fraction of 30wt% was slowly added dropwise. After the addition was completed, the temperature was raised to 25°C and the reaction was stirred for 10h. Then the mixture was allowed to stand and separated. The aqueous layer was removed, and sodium sulfite solution was added to the oil layer. The mixture was heated to 55°C and the reaction was continued for 5h. After the reaction was completed, the mixture was extracted and washed with water to obtain an oily liquid.

[0053] S2: 11.9g of oily liquid, 30mL of distilled water and 0.2g of concentrated sulfuric acid were added to a container in sequence. At 2℃, 29.5mL of isopropylamine solution with a volume fraction of 40vt% was slowly added dropwise. After the addition was completed, the reaction was continued for 14h. After the reaction was completed, the mixture was allowed to stand, precipitated, filtered, dried and recrystallized to obtain a white solid.

[0054] S3: Mix 60 mL of ethyl acetate and 13.1 g of white solid. At 5 °C, slowly add 20 mL of thioyl chloride, controlling the addition time to 1 h. After the addition is complete, continue the reaction for 6 h, then react at 32 °C for 5 h. After the reaction is complete, add 10 mL of distilled water and shake for 10 min. Let stand, remove the water layer, dry, filter, and rotary evaporate to obtain the antibacterial agent.

[0055] This embodiment discloses a modified mixed cat litter containing zeolite bentonite, which is composed of the following components by weight: 30 parts modified cat litter, 10 parts bentonite cat litter, and 0.1 parts antibacterial agent.

[0056] This embodiment discloses a method for preparing modified mixed cat litter containing zeolite bentonite, comprising the following steps:

[0057] Step (1): Add the modified cat litter, bentonite cat litter and antibacterial agent to different vibrating screens respectively, and guide them to the same material bucket at the bottom of the vibrating screens;

[0058] Step (2): Adjust the frequency of the vibrating screen to make the modified cat litter, bentonite cat litter and antibacterial agent mix evenly. The mixture in the bucket is the modified mixed cat litter containing zeolite bentonite.

[0059] Example 3

[0060] This embodiment discloses a method for preparing modified cat litter, including the following steps:

[0061] Q1: Wash the corn stalks, dry them at 70℃ for 12 hours, crush them, and pass them through a 40-mesh sieve to obtain corn stalk powder. Heat and mix 3g of corn stalk powder with 90mL of 10vt% nitric acid solution and react at 90℃ for 4 hours. Filter, wash, and dry to obtain corn stalk cellulose.

[0062] Q2: Add 12g of corn stalk cellulose to a container containing a thermometer, a nitrogen line and a reflux condenser, then add 2g of acrylic acid, 0.076g of potassium persulfate and 0.04g of N,N-methylenebisacrylamide, purge with nitrogen, stir at 70℃ and 600rpm for 5h. After the reaction is complete, cool, dry and grind to obtain the water-absorbing polymer.

[0063] Q3: 50g zeolite, 24g soybean residue, 14g starch, 12g water-absorbing polymer, 6g citric acid, 5g calcium carbonate and 3g talc are pulverized and mixed to obtain a mixed powder. 2g polyacrylamide and 700mL distilled water are mixed to prepare a polyacrylamide solution. 40g of the mixed powder is added to a fluidized bed spray granulator, and 6mL of the polyacrylamide solution is added to the two-fluid nozzle of the fluidized bed spray granulator. The mixture is mixed, collided, wetted and granulated to obtain modified cat litter.

[0064] This embodiment discloses a method for preparing an antibacterial agent, including the following steps:

[0065] S1: After stirring 2.4g of ammonia and 51.6g of methyl acrylate at 3℃, 12mL of sodium polysulfide solution with a mass fraction of 30wt% was slowly added dropwise. After the addition was completed, the temperature was raised to 25℃ and the reaction was stirred for 10h. Then the mixture was allowed to stand and separated. The aqueous layer was removed, and sodium sulfite solution was added to the oil layer. The mixture was heated to 55℃ and the reaction was continued for 5h. After the reaction was completed, the mixture was extracted and washed with water to obtain an oily liquid.

[0066] S2: 15.47g of oily liquid, 39mL of distilled water and 0.26g of concentrated sulfuric acid were added to a container in sequence. At 2℃, 38.35mL of isopropylamine solution with a volume fraction of 40vt% was slowly added dropwise. After the addition was completed, the reaction was continued for 14h. After the reaction was completed, the mixture was allowed to stand, precipitated, filtered, dried and recrystallized to obtain a white solid.

[0067] S3: Mix 72 mL of ethyl acetate and 15.72 g of white solid. At 5 °C, slowly add 24 mL of thioyl chloride, controlling the addition time to 1 h. After the addition is complete, continue the reaction for 6 h, then react at 32 °C for 5 h. After the reaction is complete, add 12 mL of distilled water and shake for 10 min. Let stand, remove the water layer, dry, filter, and rotary evaporate to obtain the antibacterial agent.

[0068] This embodiment discloses a modified mixed cat litter containing zeolite bentonite, which is composed of the following components in parts by weight: 50 parts modified cat litter, 20 parts bentonite cat litter, and 0.3 parts antibacterial agent.

[0069] This embodiment discloses a method for preparing modified mixed cat litter containing zeolite bentonite, comprising the following steps:

[0070] Step (1): Add the modified cat litter, bentonite cat litter and antibacterial agent to different vibrating screens respectively, and guide them to the same material bucket at the bottom of the vibrating screens;

[0071] Step (2): Adjust the frequency of the vibrating screen to make the modified cat litter, bentonite cat litter and antibacterial agent mix evenly. The mixture in the bucket is the modified mixed cat litter containing zeolite bentonite.

[0072] Example 4

[0073] This embodiment discloses a method for preparing modified cat litter, including the following steps:

[0074] Q1: Wash the corn stalks, dry them at 70℃ for 12 hours, crush them, and pass them through a 40-mesh sieve to obtain corn stalk powder. Heat and mix 1.5g of corn stalk powder with 75mL of 10vt% nitric acid solution and react them at 90℃ for 4 hours. Filter, wash, and dry to obtain corn stalk cellulose.

[0075] Q2: Add 9g of corn stalk cellulose to a container containing a thermometer, nitrogen line, and reflux condenser, then add 1.2g of acrylic acid, 0.048g of potassium persulfate, and 0.025g of N,N-methylenebisacrylamide.

[0076] Nitrogen gas was introduced, and the mixture was stirred at 70°C and 600 rpm for 5 hours. After the reaction was completed, the mixture was cooled, dried, and ground to obtain the water-absorbing polymer.

[0077] Q3: 45g zeolite, 22g soybean residue, 11g starch, 9g water-absorbing polymer, 3g citric acid, 2g calcium carbonate and 1.5g talc are pulverized and mixed to obtain a mixed powder. 1.2g polyacrylamide and 500mL distilled water are mixed to prepare a polyacrylamide solution. 25g of the mixed powder is added to a fluidized bed spray granulator, and 4mL of the polyacrylamide solution is added to the two-fluid nozzle of the fluidized bed spray granulator. The mixture is mixed, collided, wetted and granulated to obtain modified cat litter.

[0078] This embodiment discloses a method for preparing an antibacterial agent, including the following steps:

[0079] S1: 1.5g of ammonia and 32.3g of methyl acrylate were stirred at 3℃, and 9mL of sodium polysulfide solution with a mass fraction of 30wt% was slowly added dropwise. After the addition was completed, the temperature was raised to 25℃ and the reaction was stirred for 10h. Then the mixture was allowed to stand and separated. The aqueous layer was removed, and sodium sulfite solution was added to the oil layer. The mixture was heated to 55℃ and the reaction was continued for 5h. After the reaction was completed, the mixture was extracted and washed with water to obtain an oily liquid.

[0080] S2: 12.8g of oily liquid, 32mL of distilled water and 0.22g of concentrated sulfuric acid were added to a container in sequence. At 2℃, 31.72mL of isopropylamine solution with a volume fraction of 40vt% was slowly added dropwise. After the addition was completed, the reaction was continued for 14h. After the reaction was completed, the mixture was allowed to stand, precipitated, filtered, dried and recrystallized to obtain a white solid.

[0081] S3: Mix 63 mL of ethyl acetate and 13.6 g of white solid. At 5 °C, slowly add 21 mL of thiocyanate chloride, controlling the addition time to 1 h. After the addition is complete, continue the reaction for 6 h, then react at 32 °C for 5 h. After the reaction is complete, add 10.5 mL of distilled water, shake for 10 min, let stand, remove the water layer, dry, filter, and rotary evaporate to obtain the antibacterial agent.

[0082] This embodiment discloses a modified mixed cat litter containing zeolite bentonite, which is composed of the following components in parts by weight: 35 parts modified cat litter, 12 parts bentonite cat litter, and 0.15 parts antibacterial agent.

[0083] This embodiment discloses a method for preparing modified mixed cat litter containing zeolite bentonite, comprising the following steps:

[0084] Step (1): Add the modified cat litter, bentonite cat litter and antibacterial agent to different vibrating screens respectively, and guide them to the same material bucket at the bottom of the vibrating screens;

[0085] Step (2): Adjust the frequency of the vibrating screen to make the modified cat litter, bentonite cat litter and antibacterial agent mix evenly. The mixture in the bucket is the modified mixed cat litter containing zeolite bentonite.

[0086] Example 5

[0087] This embodiment discloses a method for preparing modified cat litter, including the following steps:

[0088] Q1: Wash the corn stalks, dry them at 70℃ for 12 hours, crush them, and pass them through a 40-mesh sieve to obtain corn stalk powder. Heat and mix 2.5g of corn stalk powder with 45mL of 10vt% nitric acid solution and react them at 90℃ for 4 hours. Filter, wash, and dry to obtain corn stalk cellulose.

[0089] Q2: Add 11g of corn stalk cellulose to a container containing a thermometer, a nitrogen line and a reflux condenser, then add 1.7g of acrylic acid, 0.067g of potassium persulfate and 0.035g of N,N-methylenebisacrylamide, purge with nitrogen, stir at 70℃ and 600rpm for 5h. After the reaction is complete, cool, dry and grind to obtain the water-absorbing polymer.

[0090] Q3: 35g zeolite, 19g soybean residue, 13g starch, 11g water-absorbing polymer, 5g citric acid, 4g calcium carbonate and 2.5g talc are pulverized and mixed to obtain a mixed powder. 1.7g polyacrylamide and 600mL distilled water are mixed to prepare a polyacrylamide solution. 35g of the mixed powder is added to a fluidized bed spray granulator, and 5mL of the polyacrylamide solution is added to the two-fluid nozzle of the fluidized bed spray granulator. The mixture is mixed, collided, wetted and granulated to obtain modified cat litter.

[0091] This embodiment discloses a method for preparing an antibacterial agent, including the following steps:

[0092] S1: 2.1 g of ammonia and 45.2 g of methyl acrylate were stirred at 3 °C, and 11 mL of 30 wt% sodium polysulfide solution was slowly added dropwise. After the addition was completed, the temperature was raised to 25 °C and the reaction was stirred for 10 h. Then the mixture was allowed to stand and separated. The aqueous layer was removed, and sodium sulfite solution was added to the oil layer. The mixture was heated to 55 °C and the reaction was continued for 5 h. After the reaction was completed, the mixture was extracted and washed with water to obtain an oily liquid.

[0093] S2: 14.58g of oily liquid, 37mL of distilled water and 0.24g of concentrated sulfuric acid were added to a container in sequence. At 2℃, 36.14mL of isopropylamine solution with a volume fraction of 40vt% was slowly added dropwise. After the addition was completed, the reaction was continued for 14h. After the reaction was completed, the mixture was allowed to stand, precipitated, filtered, dried and recrystallized to obtain a white solid.

[0094] S3: Mix 69 mL of ethyl acetate and 15.11 g of white solid. At 5 °C, slowly add 23 mL of thiocyanate chloride, controlling the addition time to 1 h. After the addition is complete, continue the reaction for 6 h, then react at 32 °C for 5 h. After the reaction is complete, add 11.5 mL of distilled water, shake for 10 min, let stand, remove the water layer, dry, filter, and rotary evaporate to obtain the antibacterial agent.

[0095] This embodiment discloses a modified mixed cat litter containing zeolite bentonite, which is composed of the following components in parts by weight: 45 parts modified cat litter, 17 parts bentonite cat litter, and 0.25 parts antibacterial agent.

[0096] This embodiment discloses a method for preparing modified mixed cat litter containing zeolite bentonite, comprising the following steps:

[0097] Step (1): Add the modified cat litter, bentonite cat litter and antibacterial agent to different vibrating screens respectively, and guide them to the same material bucket at the bottom of the vibrating screens;

[0098] Step (2): Adjust the frequency of the vibrating screen to make the modified cat litter, bentonite cat litter and antibacterial agent mix evenly. The mixture in the bucket is the modified mixed cat litter containing zeolite bentonite.

[0099] Comparative Example 1

[0100] Compared with Example 1, in the preparation of modified cat litter, the absorbent polymer in Comparative Example 1 was replaced with wood chips, while all other conditions remained unchanged.

[0101] Comparative Example 2

[0102] Compared with Example 1, Comparative Example 2 did not add polyacrylamide solution during the preparation of modified cat litter, and all other conditions remained unchanged.

[0103] Comparative Example 3

[0104] Compared with Example 1, Comparative Example 3 did not add methyl acrylate during the preparation of the antibacterial agent, and all other conditions remained unchanged.

[0105] Comparative Example 4

[0106] Compared with Example 1, Comparative Example 4 did not add isopropylamine during the preparation of the antibacterial agent, and all other conditions remained unchanged.

[0107] Comparative Example 5

[0108] Compared with Example 1, Comparative Example 5 used zeolite cat litter instead of modified cat litter in the preparation process of modified mixed cat litter containing zeolite bentonite, while keeping other conditions unchanged.

[0109] Comparative Example 6

[0110] Compared with Example 1, Comparative Example 6 did not add antibacterial agents during the preparation of modified mixed cat litter containing zeolite bentonite, and all other conditions remained unchanged.

[0111] Comparative Example 7

[0112] Compared with Example 1, Comparative Example 7 did not add bentonite cat litter during the preparation of modified mixed cat litter containing zeolite bentonite, and all other conditions remained unchanged.

[0113] The water absorption rate and deodorization effect of the samples were tested according to T / CIQA 11-2020, and the antibacterial properties of the samples were tested according to the inhibition zone experiment. The test results are shown in Table 1.

[0114] Table 1

[0115]

[0116] As shown in Table 1, the modified mixed cat litter prepared in Examples 1-5 of this invention has excellent water absorption, ammonia removal effect and antibacterial properties. The larger the diameter of the antibacterial zone, the better its antibacterial effect. Comparing Comparative Example 1 with Examples 1-5, it is evident that adding a water-absorbing polymer can result in a modified mixed cat litter with excellent water absorption. Comparing Comparative Example 2 with Examples 1-5, it is evident that adding a polyacrylamide solution can result in a modified mixed cat litter with excellent water absorption. Comparing Comparative Example 3 with Examples 1-5, it is evident that adding methyl acrylate can result in a modified mixed cat litter with excellent antibacterial properties. Comparing Comparative Example 4 with Examples 1-5, it is evident that adding isopropylamine can result in a modified mixed cat litter with excellent antibacterial properties. Comparing Comparative Example 5 with Examples 1-5, it is evident that using modified cat litter can result in a modified mixed cat litter with excellent water absorption. Comparing Comparative Example 6 with Examples 1-5, it is evident that adding an antibacterial agent can result in a modified mixed cat litter with excellent antibacterial properties. Comparing Comparative Example 7 with Examples 1-5, it is evident that adding bentonite cat litter can result in a modified mixed cat litter with excellent ammonia removal effect.

[0117] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0118] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A modified mixed cat litter containing zeolite bentonite, characterized in that, It consists of the following components in parts by weight: 30-50 parts modified cat litter, 10-20 parts bentonite cat litter, and 0.1-0.3 parts antibacterial agent. The modified cat litter is prepared from corn stalks, acrylic acid, zeolite, soybean residue, starch, and polyacrylamide solution. The antibacterial agent is prepared from ammonia, methyl acrylate, sodium polysulfide, isopropylamine, and sulfuryl chloride. The method for preparing the antibacterial agent includes the following steps: S1: After stirring ammonia and methyl acrylate at low temperature, slowly add sodium polysulfide solution dropwise. After the addition is complete, heat up and continue stirring to react. Then let stand and separate the layers. Remove the water layer and add sodium sulfite solution to the oil layer. Heat to continue the reaction. After the reaction is complete, extract and wash with water to obtain an oily liquid. S2: Add oily liquid, distilled water and concentrated sulfuric acid to a container in sequence. Under low temperature conditions, slowly add isopropylamine solution. After the addition is complete, continue the reaction. After the reaction is complete, let stand, precipitate, filter, dry and recrystallize to obtain a white solid. S3: Mix ethyl acetate and a white solid, and slowly add sulfuryl chloride dropwise under low temperature conditions, controlling the dropwise addition time. After the addition is complete, continue the reaction, then raise the temperature to react. After the reaction is complete, add distilled water and shake, let stand, remove the water layer, dry, filter, and rotary evaporate to obtain the antibacterial agent.

2. The modified mixed cat litter containing zeolite bentonite according to claim 1, characterized in that, The method for preparing the modified cat litter includes the following steps: Q1: Wash, dry, crush, and sieve the corn stalks to obtain corn stalk powder. Heat and mix the corn stalk powder with nitric acid solution, filter, wash, and dry to obtain corn stalk cellulose. Q2: Add corn stalk cellulose to a container, then add acrylic acid, potassium persulfate and N,N-methylenebisacrylamide, purge with nitrogen, heat and stir to react, after the reaction is complete, cool, dry and grind to obtain water-absorbing polymer; Q3: Zeolite, soybean residue, starch, water-absorbing polymer, citric acid, calcium carbonate and talc are pulverized and mixed to obtain a mixed powder. Polyacrylamide and distilled water are mixed to prepare a polyacrylamide solution. The mixed powder is added to a fluidized bed spray granulator, and the polyacrylamide solution is added to the two-fluid nozzle of the fluidized bed spray granulator. The mixture is mixed, collided, wetted and granulated to obtain modified cat litter.

3. The modified mixed cat litter containing zeolite bentonite according to claim 2, characterized in that, In Q1, the drying temperature is 70-80℃, the time is 10-12h, the sieve particle size is 40-60 mesh, the ratio of corn stalk powder to nitric acid solution is (1-3)g:(30-90)mL, the volume fraction of nitric acid solution is 10vt%, the heating and mixing reaction temperature is 90-100℃, and the reaction time is 4-6h. In Q2, the container contains a thermometer, a nitrogen pipeline and a reflux condenser, the mass ratio of corn stalk cellulose, acrylic acid, potassium persulfate and N,N-methylenebisacrylamide is (8-12):(1-2):(0.038-0.076):(0.02-0.04), the heating and stirring reaction temperature is 60-70℃, the stirring speed is 500-600rpm, and the reaction time is 3-5h.

4. The modified mixed cat litter containing zeolite bentonite according to claim 2, characterized in that, In Q3, the mass ratio of zeolite, soybean residue, starch, water-absorbing polymer, citric acid, calcium carbonate and talc is (30-50):(18-24):(10-14):(8-12):(2-6):(1-5):(1-3), the ratio of polyacrylamide to distilled water is (1-2) g:(400-700) mL, and the ratio of mixed powder to polyacrylamide solution is (20-40) g:(3-6) mL.

5. The modified mixed cat litter containing zeolite bentonite according to claim 1, characterized in that, In S1, the ratio of ammonia, methyl acrylate, and sodium polysulfide solution is (1.2-2.4) g : (25.8-51.6) g : (8-12) mL, the mass fraction of sodium polysulfide solution is 30 wt%, the low-temperature stirring temperature is 0-5℃, the temperature is raised to 25-30℃, the stirring reaction time is continued for 8-10 h, the heating reaction temperature is continued for 50-55℃, and the reaction time is 4-5 h.

6. The modified mixed cat litter containing zeolite bentonite according to claim 1, characterized in that, In step S2, the ratio of oily liquid, distilled water, concentrated sulfuric acid, and isopropylamine solution is (11.9-15.47) g : (30-39) mL : (0.2-0.26) g : (29.5-38.35) mL, the low temperature is 0-5℃, the volume fraction of isopropylamine solution is 40 wt%, and the reaction time is 14-16 h.

7. The modified mixed cat litter containing zeolite bentonite according to claim 1, characterized in that, In S3, the ratio of ethyl acetate, white solid, thiocyanate chloride, and distilled water is (60-72) mL : (13.1-15.72) g : (20-24) mL : (10-12) mL. The low temperature condition is 2-5℃, the dropping time is controlled at 1-1.2 h, the reaction time is 4-6 h, the temperature is raised to 28-32℃, the reaction time is 3-5 h, and the shaking time is 5-10 min.

8. A method for preparing a modified mixed cat litter containing zeolite bentonite as described in any one of claims 1-7, characterized in that, Includes the following steps: Step (1): Add the modified cat litter, bentonite cat litter and antibacterial agent to different vibrating screens respectively, and guide them to the same material bucket at the bottom of the vibrating screens; Step (2): Adjust the frequency of the vibrating screen to make the modified cat litter, bentonite cat litter and antibacterial agent mix evenly. The mixture in the bucket is the modified mixed cat litter containing zeolite bentonite.

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