Deodorizing and bacteriostatic cat litter and preparation method thereof

Abstract

The present application relates to the technical field of sugar making, and particularly relates to a deodorization and bacteriostasis type cat litter and a preparation method thereof, the deodorization and bacteriostasis type cat litter is mainly prepared from the following raw materials in parts by weight: bagasse 70-80 parts, bagasse activated carbon 1-3 parts, modified bagasse lignin 5-9 parts, guar gum 4-7 parts and water 6-8 parts; on the basis of ensuring that the cat litter has strong water absorption and cohesiveness, the deodorization and bacteriostasis of the cat litter are enhanced, and the generation of unpleasant odor and the growth of bacteria in the process of breeding pet cats are avoided.

Description

[0001] The present application relates to the technical field of cat litter, in particular to a deodorizing and bacteriostatic cat litter and a preparation method thereof.

[0002] In recent years, pet feeding has begun to be popular in the global market and gradually become a trend. Among them, pet cats are increasingly loved by people because of their gentle character, cute appearance, and easy feeding, without the need to take them out for daily play. They have become the second most popular pet for people after dogs. With the popularity of pet cat feeding, how to scientifically and healthily handle their excrement has become a thorny problem. Cat litter is generally defined as a material used to handle pet cat excrement. It has good water absorption and is generally used with a cat litter box. A suitable amount of cat litter is poured into the cat litter box, and a trained cat will walk into the cat litter box to excrete on it when it needs to excrete. Since the advent of cat litter, from the initial simulation of sand to the non-coagulation cat litter that is convenient to pick up feces and the coagulation cat litter such as crystal cat litter, bentonite cat litter, and tofu cat litter, the indoor excretion problem of pet cats has been solved more and more conveniently. According to the Global Market Insights in 2019, the value of global pet products will reach 269 billion US dollars in 2019, and the market value of cat litter (clay and biological products) is about 3.9 billion US dollars. It is estimated that this value will reach a sales volume of 5.4 billion US dollars by 2025, accounting for 50% of the main market share in North America. The total value of the global cat litter market reached 32.3 billion yuan in 2019, and is expected to grow to 41.5 billion yuan by 2026, with a compound annual growth rate of 3.6%. Since 2013, the sales volume of cat litter in the Chinese market has increased rapidly, reaching 233,000 tons in 2017, with an annual growth rate of 17.46%. The popularity of cat litter in the Chinese market is rapidly increasing, and it is estimated that the sales volume of cat litter in China will reach 892,000 tons by 2024. As can be seen, the demand for cat litter in the global market is large and increasing year by year.

[0003] However, at present, various cat litters in the cat litter market are of varying quality, and pet owners mainly focus on water absorption, coagulation, deodorization, and bacteriostasis when choosing cat litter. In recent years, the cat litter commonly seen on the market mainly has strong water absorption and coagulation, but weak deodorization and bacteriostasis. If the volatile sulfur compounds in cat feces are inhaled by the human body, it will cause negative emotions and harm to the health of the human body. At the same time, cat litter is stored in a cat litter box for at least two weeks, so it is easy to breed harmful bacteria, thereby affecting the health of cats and owners. Therefore, while ensuring that cat litter has strong water absorption and coagulation, attention should be paid to improving the deodorization and bacteriostasis performance of cat litter, so as to create a more comfortable and healthy environment for pet cats and their owners.

[0004] ​​Patent document CN114391478A discloses a preparation method of degradable bacteriostatic and odor-removing cat litter. Plant fiber, bean dregs powder, corn starch and puffed corn powder are mixed and crushed. Adhesives, preservatives and bacteriostatic and deodorizing powder (silver titanium powder) are added to the mixture to prepare cat litter to achieve deodorization and bacteriostasis performance. The deodorization performance can reach more than 90%, and the bacteriostasis performance can reach 99.999%. However, the silver titanium powder is expensive and difficult to achieve industrial production. The odor substances used in this invention are formaldehyde, trimethylamine, methyl mercaptan, ammonia and hydrogen sulfide, which are representative odor substances in the environment, but not the direct odor substances in cat feces. Patent document CN112841050A discloses a pure natural and environmentally friendly type of bean cat litter with bacteriostatic and deodorizing functions. The deodorizing agent is a combination of one or more of tea polyphenols, fishy grass extract and garlic powder. Bamboo fiber is not only the main substrate, but also acts as a bacteriostatic agent due to its content of flavonoid extract. The sterilization rate of bamboo fiber on salmonella, escherichia coli and mold is 97%-98%. Although the prepared cat litter product has a certain fragrance, and the added tea polyphenol and other substances have a certain deodorizing property, the invention does not have specific numerical data on the deodorizing property of cat litter. The cost of adding bamboo powder, tea polyphenol and fishy grass extract is high, and it is difficult to achieve industrial production.

[0005] In summary, although there are some patent researches on improving the bacteriostasis and deodorization of cat litter, the patent research on the deodorization of cat litter is still not specific and direct. There is no targeted research on the deodorization of cat litter on the odor substances existing in cat feces, so as to directly reflect the deodorization of cat litter. In addition, cat litter is stored in the cat litter box for at least two weeks. Because of the long storage time, cat litter needs to have strong deodorizing and bacteriostatic properties. At present, the deodorizing property of plant fiber cat litter mostly depends on the structure of plant fiber itself and its unique fragrance, and its deodorizing ability is limited. Improving the bacteriostasis of cat litter mainly depends on the addition of bacteriostatic agents, which limits the research and development of improving the bacteriostasis of cat litter due to its safety and high price.

[0006] In summary, there is an urgent need for a cat litter that has strong deodorizing property on the unique odor substances in cat feces, strong bacteriostatic property on the pathogenic bacteria existing in cat feces, and components that do not affect the health and safety of pet cats and their owners. SUMMARY

[0007] In view of the above, it is necessary to provide a deodorizing and bacteriostatic cat litter and a preparation method thereof. The method significantly enhances the deodorizing and bacteriostatic properties of cat litter on the basis of ensuring that the bagasse cat litter has strong water absorption and clumping properties.

[0008] To achieve the above-mentioned purposes, the technical solution adopted by the present application is:

[0009] The deodorizing and bacteriostatic cat litter is mainly made of the following raw materials in parts by weight: 70-80 parts of bagasse, 1-3 parts of bagasse activated carbon, 5-9 parts of modified bagasse lignin, 4-7 parts of guar gum and 6-8 parts of water.

[0010] Further, the deodorizing and bacteriostatic cat litter is mainly made of the following raw materials in parts by weight: 75 parts of bagasse, 2 parts of bagasse activated carbon, 6 parts of modified bagasse lignin, 5 parts of guar gum and 7 parts of water.

[0011] Further, the bagasse activated carbon is obtained by the following method: mixing bagasse, H3PO4 and HNO3 in a mass ratio of 1-2:2-3:2-3, then ultrasonic treating the mixture at an ultrasonic power of 450-550 W for 25-35 min, and standing at room temperature for 24 h, drying at 110-130 ℃ for 24 h after standing, then calcining at a high temperature of 650-750 ℃ in a muffle furnace for 0.4-0.6 h, washing the obtained product with deionized water, and finally heating and drying the washed product in an oven at 100-110 ℃ to constant weight to obtain the bagasse activated carbon.

[0012] Further, the mass fraction of H3PO4 is 25%, and the mass fraction of HNO3 is 15%.

[0013] Further, the modified bagasse lignin is prepared by the following method:

[0014] 1) Separating and purifying bagasse lignin from black liquor: diluting concentrated black liquor 9-11 times with distilled water, adding sulfuric acid to adjust the pH of the solution to 2, standing for 2-4 h, centrifugally collecting the solid, washing the solid with dilute acid with a pH of 2 for 2-4 times, then washing the solid with deionized water for 2-4 times, and freeze-drying in a vacuum freeze-drying machine for 36 h to obtain crude bagasse lignin; dissolving the crude bagasse lignin in a methanol-acetone mixture to obtain a lignin solution, dropping the lignin solution into diethyl ether to precipitate lignin, centrifugally collecting the lignin, washing the lignin with diethyl ether for 2-4 times, and vacuum drying at 35-45 ℃, and the obtained solid after drying is the purified original bagasse lignin; the dilute acid used above is selected from dilute hydrochloric acid.

[0015] 2) take the molar ratio of 1:2 of choline chloride and formic acid in a round bottom flask, put into the round bottom flask and add the rotor, then put the round bottom flask into the heat collecting constant temperature heating magnetic stirrer, the temperature is set to 55-65 DEG C, after the solid in the round bottom flask is completely melted to transparent state, the stirrer is heated to 95-105 DEG C, then add aluminum chloride hexahydrate, the molar ratio of choline chloride and aluminum chloride hexahydrate is 1:0.1, continue to stir and heat, after the solid in the system is completely melted, the solution is transparent, stop stirring, after the solution temperature drops to room temperature and no crystal is precipitated, the ternary eutectic solvent is obtained;The ternary eutectic solvent is mixed with the original bagasse lignin in the reaction kettle according to the solid-liquid ratio of 1:18-22, and is reacted at 115-125 DEG C for 3-5 h, after the reaction kettle is cooled to room temperature, the obtained product is mixed with deionized water, and the obtained precipitate is the modified bagasse lignin.

[0016] The solid-liquid ratio refers to the mass ratio of solid and liquid.

[0017] Further, the mass fraction of sulfuric acid in step 1) is 50%.

[0018] Further, the methanol-acetone mixture is obtained by mixing methanol and acetone at a volume ratio of 7:3;The solid-liquid ratio of the bagasse crude lignin and the methanol-acetone mixture is 1g:3-4mL.

[0019] The application also provides a preparation method of the above-mentioned deodorizing and bacteriostatic cat litter, which comprises the following steps:

[0020] (1) pretreatment of bagasse: soak the bagasse in water for 3-5 h, then filter and dry it in a forced air drying oven at 100-110 DEG C for 11-13 h, crush and pass through a 25-35 mesh sieve to obtain the pretreated bagasse for use;

[0021] (2) first stirring: mix the pretreated bagasse, guar gum and water, and stir thoroughly to obtain a stirring material;

[0022] (3) second stirring: weigh the bagasse activated carbon and modified bagasse lignin, and add them to the stirring material in step (1) for stirring to obtain a cat litter material;

[0023] (4) granulation and molding: use an extrusion granulator to granulate and mold the cat litter material obtained in step (3), and then dry it in a forced air drying oven and cool it, and then screen and measure the cooled product to obtain the deodorizing and bacteriostatic cat litter, which is stored in a drying oven for use.

[0024] Further, the temperature of the water used for soaking the bagasse in step (1) is 60-80 DEG C.

[0025] Further, the temperature of the water used for soaking the bagasse in step (1) is 60-80 DEG C.

[0026] The present application has at least the following beneficial effects:

[0027] 1. In order to fundamentally remove the odor substances in cat feces, the present application provides a natural and environmentally friendly cat litter with antibacterial and deodorizing functions, which takes the characteristic odor substance (3-sulfanyl-3-methyl-1-butanol) in cat feces as the removal object and takes harmful bacteria such as Escherichia coli and Salmonella in pet feces as the antibacterial object, and adds self-made non-toxic bagasse activated carbon and bagasse lignin in the cat litter, which can significantly enhance the deodorizing property and antibacterial property of the cat litter on the basis of ensuring that the bagasse cat litter has strong water absorption and clumping property.

[0028] 2. The bagasse activated carbon added in the bagasse cat litter reaches the first level activated carbon standard (iodine value adsorption > 1000 mg / g), and the test verification shows that the removal rate of the characteristic odor substance (3-sulfanyl-3-methyl-1-butanol) in cat feces can reach 95.64%; in addition, the modified bagasse lignin added in the bagasse cat litter, the content of phenolic hydroxyl in the lignin is important to improve the antibacterial effect, which can destroy the cell membrane, denature the protein, inhibit the respiratory system and electron transfer enzyme system activity of the microbial cells, so as to achieve high-efficiency antibacterial effect, and the antibacterial rates of the cat litter on Escherichia coli and Salmonella are 98.32% and 97.58 respectively, the clumping rate of the bagasse cat litter is 86.8%, according to the market demand and the willingness of the feeders, the minimum acceptable level of the clumping rate of the cat litter in use is at least about 60%, therefore, the clumping rate can meet the market demand, and the bagasse cat litter also has good performance in water absorption, because the bagasse treated by the present application has removed sugar and wax in advance, and will swell when meeting water, and has loose structure, so it has certain water absorption and water retention.

DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application, therefore the present application is not limited by the specific implementation disclosed below.

[0030] Example 1:

[0031] The present embodiment discloses a deodorizing and antibacterial cat litter, which is mainly made of the following raw materials by weight: 70 parts of bagasse, 1 part of bagasse activated carbon, 5 parts of modified bagasse lignin, 4 parts of guar gum and 6 parts of water.

[0032] The bagasse activated carbon is obtained by the following method: bagasse, 25wt.% H3PO4 and 15wt.% HNO3 are mixed according to the mass ratio of 1:2:2, the obtained mixture is subjected to ultrasonic treatment under the ultrasonic power of 450W for 25min, and is placed at room temperature for 24h, after the standing, it is dried at 110℃ for 24h, then it is calcined at high temperature of 650℃ in a muffle furnace for 0.4h, the obtained product is washed with deionized water to completely remove the unreacted acid, and finally the washed product is placed in an oven and heated at 100℃ until constant weight, so that the bagasse activated carbon is obtained;

[0033] The preparation method of the modified bagasse lignin is as follows: 1) separating and purifying bagasse lignin from black liquor: after the concentrated black liquor is diluted 9 times with distilled water, 50wt.% sulfuric acid is added to adjust the pH of the solution to 2, and the solution is placed for 2h, the solid is collected by centrifugation, and then the solid is washed twice with dilute acid with a pH of 2, followed by washing the solid twice with deionized water, and then the solid is freeze-dried in a vacuum freeze dryer for 36h to obtain crude bagasse lignin; the crude bagasse lignin is dissolved in a methanol-acetone mixture to obtain a lignin solution, the lignin solution is dropped into diethyl ether to precipitate lignin, the lignin is collected by centrifugation, washed twice with diethyl ether, and dried at 35℃ under vacuum, and the obtained solid after drying is the purified original bagasse lignin; the methanol-acetone mixture is obtained by mixing methanol and acetone according to a volume ratio of 7:3; the solid-liquid ratio of the crude bagasse lignin and the methanol-acetone mixture is 1g:3mL; 2) choline chloride and formic acid with a molar ratio of 1:2 are weighed in a round-bottom flask, a rotor is placed in the round-bottom flask, the round-bottom flask is placed in a heat collecting type constant temperature heating magnetic stirrer, the temperature is set to 55℃, after the solid in the round-bottom flask is completely melted to a transparent state, the stirrer is heated to 95℃, aluminum chloride hexahydrate is added, the molar ratio of choline chloride and aluminum chloride hexahydrate is 1:0.1, the stirring and heating are continued, after the solid in the system is completely melted and the solution becomes transparent, the stirring is stopped, and after the solution temperature decreases to room temperature and no crystals are precipitated, a ternary eutectic solvent is obtained; the ternary eutectic solvent and the original bagasse lignin are mixed in a reaction kettle according to a solid-liquid (mass) ratio of 1:18, and reacted at 115℃ for 3h, after the reaction kettle is cooled to room temperature, the obtained product is mixed with deionized water, and the obtained precipitate is the modified bagasse lignin.

[0034] The preparation method of the deodorizing and bacteriostatic cat litter of the embodiment is as follows:

[0035] (1) Pretreatment of bagasse: the bagasse is soaked in water at 60℃ for 3h to remove sugar and wax, then it is filtered and dried in a forced air drying oven at 100℃ for 11h, crushed and sieved through a 25 mesh sieve to obtain treated bagasse for use;

[0036] (2) First stirring: after mixing the treated bagasse, guar gum and hot water with a temperature of 90℃, the mixture is stirred thoroughly to obtain a stirred material;

[0037] (3) Second stirring: bagasse activated carbon and modified bagasse lignin are weighed and added to the stirred material in step (1) to obtain cat litter material;

[0038] (4) Granulation molding: the cat litter material obtained in step (3) is granulated and molded by using an extrusion granulator, and then dried by a forced air drying oven and cooled. After cooling, the product is screened and measured to obtain deodorizing and bacteriostatic cat litter, which is stored in a drying oven for standby.

[0039] Example 2:

[0040] The present embodiment discloses a deodorizing and bacteriostatic cat litter, which is mainly made of the following raw materials by weight: 75 parts of bagasse, 2 parts of bagasse activated carbon, 6 parts of modified bagasse lignin, 5 parts of guar gum and 7 parts of water;

[0041] The bagasse activated carbon is obtained by the following method: bagasse, 25wt.%H3PO4 and 15wt.%HNO3 are mixed in a mass ratio of 1:2:2, and then the obtained mixture is ultrasonically treated under an ultrasonic power of 500W for 30min, and is left to stand at room temperature for 24h. After standing, it is dried at 120℃ for 24h, and then calcined at a high temperature of 700℃ in a muffle furnace for 0.5h. The obtained product is washed with deionized water to completely remove unreacted acid, and finally the washed product is heated and dried to constant weight in an oven at 105℃, thereby obtaining the bagasse activated carbon;

[0042] The preparation method of the modified bagasse lignin is as follows: 1) separating and purifying bagasse lignin from black liquor: after diluting the concentrated black liquor 10 times with distilled water, the solution pH is adjusted to 2 by adding 50wt.% sulfuric acid, and the solid is collected by centrifugation after standing for 3h, and then the solid is washed with dilute acid with pH value of 2 for 3 times, followed by washing the solid with deionized water for 3 times, and then freeze-drying in a vacuum freeze-drying machine for 36h to obtain crude bagasse lignin; the crude bagasse lignin is dissolved in a methanol-acetone mixture to obtain a lignin solution, the lignin solution is dropped into diethyl ether to precipitate lignin, the lignin is collected by centrifugation, washed with diethyl ether for 3 times, and dried at 40℃ under vacuum, and the obtained solid after drying is the purified original bagasse lignin; the methanol-acetone mixture is obtained by mixing methanol and acetone at a volume ratio of 7:3; the solid-liquid ratio of the crude bagasse lignin and the methanol-acetone mixture is 1g:3.5mL; 2) weighing choline chloride and formic acid with a molar ratio of 1:2 in a round-bottom flask, putting it into the round-bottom flask and adding a rotor, then putting the round-bottom flask into a heat collecting type constant temperature heating magnetic stirrer, setting the temperature to 60℃, after the solid in the round-bottom flask is completely melted to a transparent state, raising the stirrer to 100℃, then adding aluminum chloride hexahydrate, the molar ratio of choline chloride and aluminum chloride hexahydrate is 1:0.1, continuing to stir and heat, stopping stirring after the solid in the system is completely melted and the solution becomes transparent, and the solution temperature is reduced to room temperature without crystal precipitation, obtaining a ternary eutectic solvent; mixing the ternary eutectic solvent and the original bagasse lignin in a reaction kettle at a solid-liquid ratio of 1:20, reacting at 120℃ for 4h, after the reaction kettle is cooled to room temperature, mixing the obtained product with deionized water, and the obtained precipitate is the modified bagasse lignin.

[0043] The preparation method of the deodorizing and bacteriostatic cat litter of the embodiment is as follows:

[0044] (1) Pretreatment of bagasse: the bagasse is soaked in water at 70℃ for 4h to remove sugar and wax, then filtered and dried in a 105℃ air drying oven for 12h, crushed and sieved through a 30 mesh sieve to obtain treated bagasse for standby use;

[0045] (2) First stirring: the treated bagasse, guar gum and hot water at 90℃ are mixed and stirred to obtain a stirring material;

[0046] (3) Second stirring: the bagasse activated carbon and modified bagasse lignin are weighed and added into the stirring material in step (1) for stirring to obtain a cat litter material;

[0047] (4) Granulation and molding: the cat litter material obtained in step (3) is granulated and molded by using an extrusion granulator, dried by an air drying oven and then cooled, screened and metered after cooling to obtain the deodorizing and bacteriostatic cat litter, which is stored in a drying oven for standby use.

[0048] Example 3:

[0049] The embodiment discloses a deodorizing and bacteriostatic cat litter, which is mainly made of the following raw materials in parts by weight: 80 parts of bagasse, 3 parts of bagasse activated carbon, 9 parts of modified bagasse lignin, 7 parts of guar gum and 8 parts of water.

[0050] The bagasse activated carbon is obtained by mixing bagasse, 25 wt.% H3PO4 and 15 wt.% HNO3 in a mass ratio of 2:3:3, then performing ultrasonic treatment on the mixture under an ultrasonic power of 550 W for 35 min, and standing at room temperature for 24 h, and then drying at 130 DEG C for 24 h, and then calcining at 750 DEG C in a muffle furnace for 0.6 h, and then washing the obtained product with deionized water to completely remove unreacted acid, and finally drying the washed product in an oven at 110 DEG C until constant weight to obtain the bagasse activated carbon.

[0051] The modified bagasse lignin is prepared by the following method: 1) separating and purifying bagasse lignin from black liquor: after diluting the concentrated black liquor 11 times with distilled water, 50 wt.% sulfuric acid is added to adjust the pH of the solution to 2, and then standing for 4 h, and then centrifuging to collect the solid, and then washing the solid with dilute acid with a pH of 2 for 4 times, and then washing the solid with deionized water for 4 times, and then freeze-drying in a vacuum freeze-drying machine for 36 h to obtain crude bagasse lignin; the crude bagasse lignin is dissolved in a methanol-acetone mixture to obtain a lignin solution, and then the lignin solution is dropped into diethyl ether to precipitate lignin, and then the lignin is collected by centrifugation, and then washed with diethyl ether for 4 times, and then vacuum dried at 45 DEG C, and then the obtained solid after drying is the purified original bagasse lignin; the methanol-acetone mixture is obtained by mixing methanol and acetone in a volume ratio of 7:3; the solid-liquid ratio of the crude bagasse lignin and the methanol-acetone mixture is 1 g:4 mL; 2) weighing choline chloride and formic acid in a molar ratio of 1:2 in a round-bottom flask, putting the round-bottom flask into a heat collecting type constant temperature heating magnetic stirrer, setting the temperature to 65 DEG C, and then raising the temperature of the stirrer to 105 DEG C after the solid in the round-bottom flask is completely melted to a transparent state, and then adding aluminum chloride hexahydrate, and the molar ratio of choline chloride and aluminum chloride hexahydrate is 1:0.1, and then continuing to stir and heat, and then stopping stirring after the solid in the system is completely melted and the solution is transparent, and then obtaining a ternary eutectic solvent after the solution temperature is reduced to room temperature and no crystals are precipitated; mixing the ternary eutectic solvent and the original bagasse lignin in a reaction kettle according to a solid-liquid (mass) ratio of 1:22, and then reacting at 125 DEG C for 5 h, and then mixing the obtained product with deionized water to obtain the modified bagasse lignin.

[0052] The preparation method of the deodorizing and bacteriostatic cat litter is as follows:

[0053] (1) Bagasse pretreatment: Take the bagasse and soak it in 80℃ water for 5h to remove sugar and wax, then filter it and dry it in a 110℃ drying oven for 13h, crush it and sieve it through a 35 mesh sieve to obtain pretreated bagasse for later use;

[0054] (2) First stirring: Mix the pretreated bagasse, guar gum and hot water at 90℃ and stir thoroughly to obtain a stirring material;

[0055] (3) Second stirring: Take the bagasse activated carbon and modified bagasse lignin and add them to the stirring material in step (1) to obtain a cat litter material;

[0056] (4) Granulation and molding: Use an extrusion granulator to granulate and mold the cat litter material obtained in step (3), dry it in a blast drying oven and then cool it, sieve and measure it after cooling to obtain deodorizing and bacteriostatic cat litter, which is stored in a drying oven for later use.

[0057] Test Example:

[0058] The applicant has conducted a large number of tests to verify the effect of the present application, including deodorizing property determination, bacteriostatic property determination, clumping property determination and water absorption property determination;

[0059] The deodorizing property determination method is as follows:

[0060] Take 0.5g of cat litter and add it to a headspace bottle (10mL) with a screw cap, and add 0.2mL of 3-sulfanyl-3-methyl-1-butanol solution (diluted 1000 times from 3-sulfanyl-3-methyl-1-butanol) to each vial. Then place the headspace bottle in a room temperature (25±5℃) for 12h, and then measure the concentration of 3-sulfanyl-3-methyl-1-butanol in the headspace bottle by GC-MS, and calculate the removal rate of 3-sulfanyl-3-methyl-1-butanol to measure the deodorizing property.

[0061] The bacteriostatic property determination method is as follows:

[0062] Take 0.4mL-0.5mL of test bacteria solution (concentration of 1x10 6 CFU·mL -1 ) and drop it on the cat litter and the sterile culture dish without cat litter, respectively, and incubate at 37℃ for 24h. Take out the samples, respectively, and add physiological saline eluent, wash the samples repeatedly, shake thoroughly, and then inoculate a certain amount of them into nutrient agar medium, incubate at 37℃ for 24h, and then measure the viable cell count. Calculate the recovered bacteria count, wherein the group added to the cat litter is recorded as cat litter recovered bacteria count, and the sterile culture dish without cat litter is recorded as blank control sample recovered bacteria count, and the bacteriostatic rate is calculated according to the following formula:

[0063]

[0064] Test bacterial liquid microbial number explanation: Escherichia coli number CMCC50071, Salmonella number ATCC25922.

[0065] The determination method of the clumping property is as follows:

[0066] In an aluminum weighing pan, 2.0 g of cat litter product is added, and then a 100 mL burette is placed 9 mL above each weighing pan, and 10.0 mL of water is dropped into each weighing pan. Then the weighing pan is placed in an oven at 30°C and dried for 24 h. The dried cat litter in each weighing pan is transferred to a 4.75 mm sieve (the sieve is large enough to allow all the unclumped cat litter to pass through) and placed on a orbital shaker set at 300 rpm·min-1 for 1 min. The clumping rate of the cat litter is calculated according to the formula:

[0067]

[0068] The determination method of the water absorption is as follows:

[0069] 0.5 g of the prepared cat litter is taken in a 15 mL centrifuge tube to obtain the water absorption performance data of the cat litter. 10 mL of deionized distilled water is added to each centrifuge tube, and the sample is vibrated on an orbital vibration sieve at 250 rpm for 15 min. Then the centrifuge tube is centrifuged at 1000x gravity for 15 min, the supernatant is aspirated with a disposable rubber bulb pipette, and the centrifuge tube is weighed.

[0070]

[0071] The applicant tests the use effect of each group of cat litter according to the above determination method, and the specific grouping is as follows:

[0072] The first group: the cat litter prepared by the method of Example 2;

[0073] The second group: only the bagasse activated carbon is removed, and the other components and preparation methods are the same as the first group;

[0074] The third group: only the modified bagasse lignin is removed, and the other components and preparation methods are the same as the first group;

[0075] The fourth group: commercially available tofu cat litter purchased from a pet store;

[0076] The fifth group: commercially available bentonite cat litter purchased from a pet store;

[0077] The sixth group: the modified bagasse lignin is replaced by the original bagasse lignin, i.e. the preparation of step 2) is not continued, and the other components and preparation methods are the same as the first group

[0078] The seventh group: the bagasse is not treated in advance, and is directly used, that is, the operation of removing sugar and wax is removed, and other components and preparation methods are the same as those of the first group.

[0079] The following are the data of the experimental detection of the bagasse cat litter in the above-mentioned one embodiment and four control schemes, and Table 1 is obtained:

[0080] Table 1 Experimental parameters of the bagasse cat litter in the embodiment

[0081]

[0082] According to the results in Table 1, it can be seen that the removal rate of the characteristic odor substance (3-sulfanyl-3-methyl-1-butanol) in cat feces can reach 95.64% by using the bagasse cat litter of the present application, which is increased by 80.31% compared with the bagasse cat litter without adding bagasse activated carbon (the second group), increased by 44.52% compared with the tofu cat litter (the fourth group), and increased by 44.52% compared with the bentonite cat litter (the fifth group); it is shown that the commercially available cat litter does not specifically remove the odor substances in cat feces; in addition, the bacteriostatic rates of the cat litter of the present application on Escherichia coli and Salmonella are 98.32% and 97.58%, respectively, while the bagasse cat litter without adding lignin, the tofu cat litter and the bentonite cat litter do not have bacteriostatic properties; the modified bagasse lignin in the cat litter of the sixth group is the original bagasse lignin, and it is found that its effect is worse than that of the cat litter of the present application, mainly in that its bacteriostatic property and water absorption property are not ideal, which shows that the modified bagasse lignin obtained after treatment has outstanding progress; the cat litter of the seventh group is not treated in advance, which may cause some deterioration of the bagasse, and finally leads to poor bacteriostatic effect and unsatisfactory odor adsorption effect.

[0083] The above examples only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which are within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A deodorizing and antibacterial cat litter, characterized in that, The deodorizing and antibacterial cat litter is mainly made from the following raw materials in parts by weight: 70-80 parts bagasse, 1-3 parts bagasse activated carbon, 5-9 parts modified bagasse lignin, 4-7 parts guar gum, and 6-8 parts water. The bagasse activated carbon is obtained by the following method: bagasse, H3PO4, and HNO3 are mixed in a mass ratio of 1-2:2-3:2-3. The resulting mixture is then ultrasonically treated at an ultrasonic power of 450-550W for 25-35 minutes, and allowed to stand at room temperature for 24 hours. After standing, it is dried at 110-130℃ for 24 hours, then calcined in a muffle furnace at a high temperature of 650-750℃ for 0.4-0.6 hours. The obtained product is then washed with deionized water, and finally placed in an oven and dried at 100-110℃ until constant weight to obtain the bagasse activated carbon. The mass fraction of H3PO4 is 25%, and the mass fraction of HNO3 is 15%. The method for preparing the modified bagasse lignin is as follows: 1) Separation and purification of bagasse lignin from black liquor: Dilute concentrated black liquor 9-11 times with distilled water, add sulfuric acid to adjust the pH of the solution to 2, let stand for 2-4 hours, centrifuge to collect the solid, wash the solid 2-4 times with dilute acid at pH 2, then wash the solid 2-4 times with deionized water, and then freeze-dry in a vacuum freeze dryer for 36 hours to obtain crude bagasse lignin; dissolve the crude bagasse lignin in a methanol-acetone mixture to obtain a lignin solution, add the lignin solution dropwise to diethyl ether to precipitate the lignin, centrifuge to collect the lignin, wash with diethyl ether 2-4 times, and vacuum dry at 35-45℃. The solid obtained after drying is the purified raw bagasse lignin; 2) Weigh choline chloride and formic acid in a molar ratio of 1:2 into a round-bottom flask, place the flask in the round-bottom flask and add a rotor, then place the round-bottom flask in a heat-collecting constant-temperature magnetic stirrer, set the temperature to 55-65℃. After the solid in the round-bottom flask has completely melted and become transparent, the stirrer is heated to 95-105℃, and then aluminum chloride hexahydrate is added. The molar ratio of choline chloride to aluminum chloride hexahydrate is 1:0.

1. Stirring and heating continue until the solid in the system has completely melted and the solution has become transparent. Stirring is then stopped, and the solution temperature is allowed to drop to room temperature without any crystal precipitation, thus obtaining a ternary eutectic solvent. The ternary eutectic solvent and the original bagasse lignin are mixed in a reaction vessel at a solid-liquid ratio of 1:18-22 and reacted at 115-125℃ for 3-5 hours. After the reaction vessel has cooled to room temperature, the resulting product is mixed with deionized water, and the precipitate obtained is the modified bagasse lignin. The above-mentioned cat litter is prepared through the following steps: (1) Pretreatment of bagasse: Soak bagasse in water for 3-5 hours, then filter it and dry it in a forced-air drying oven at 100-110℃ for 11-13 hours. Crush it and pass it through a 25-35 mesh sieve to obtain the treated bagasse for use. (2) First mixing: Mix the treated bagasse, guar gum and water thoroughly to obtain the mixed material; (3) Secondary mixing: Weigh out bagasse activated carbon and modified bagasse lignin, add them to the mixing material in step (1) and mix to obtain cat litter material; (4) Granulation: The cat litter material obtained in step (3) is granulated using an extrusion granulator, dried in a blower drying oven and then cooled. After cooling, it is screened and measured to obtain deodorizing and antibacterial cat litter, which is stored in a drying oven for later use.

2. The deodorizing and antibacterial cat litter according to claim 1, characterized in that, The deodorizing and antibacterial cat litter is mainly made from the following raw materials in parts by weight: 75 parts bagasse, 2 parts bagasse activated carbon, 6 parts modified bagasse lignin, 5 parts guar gum, and 7 parts water.

3. The deodorizing and antibacterial cat litter according to claim 1, characterized in that, In the preparation of modified bagasse lignin, the mass fraction of sulfuric acid in step 1) is 50%.

4. The deodorizing and antibacterial cat litter according to claim 1, characterized in that, The methanol-acetone mixture is obtained by mixing methanol and acetone in a volume ratio of 7:3; the ratio of bagasse crude lignin to the methanol-acetone mixture is 1g:3-4mL.

5. The deodorizing and antibacterial cat litter according to claim 1, characterized in that, In the preparation of cat litter, the temperature of the water used to soak bagasse in step (1) is 60-80℃.

6. The method for preparing deodorizing and antibacterial cat litter according to any one of claims 1-5, characterized in that, The method includes the following steps: (1) Pretreatment of bagasse: Soak bagasse in water for 3-5 hours, then filter it and dry it in a forced-air drying oven at 100-110℃ for 11-13 hours. Crush it and pass it through a 25-35 mesh sieve to obtain the treated bagasse for use. (2) First mixing: Mix the treated bagasse, guar gum and water thoroughly to obtain the mixed material; (3) Secondary mixing: Weigh out bagasse activated carbon and modified bagasse lignin, add them to the mixing material in step (1) and mix to obtain cat litter material; (4) Granulation: The cat litter material obtained in step (3) is granulated using an extrusion granulator, dried in a blower drying oven and then cooled. After cooling, it is screened and measured to obtain deodorizing and antibacterial cat litter, which is stored in a drying oven for later use.

7. The method according to claim 6, characterized in that, The temperature of the water used for soaking bagasse in step (1) is 60-80℃.

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