CN110583496A - Cat urine pH indicating material, pH indicating cat litter and preparation method thereof - Google Patents
Cat urine pH indicating material, pH indicating cat litter and preparation method thereof Download PDFInfo
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- CN110583496A CN110583496A CN201910841624.9A CN201910841624A CN110583496A CN 110583496 A CN110583496 A CN 110583496A CN 201910841624 A CN201910841624 A CN 201910841624A CN 110583496 A CN110583496 A CN 110583496A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K1/00—Housing animals; Equipment therefor
- A01K1/015—Floor coverings, e.g. bedding-down sheets ; Stable floors
- A01K1/0152—Litter
- A01K1/0155—Litter comprising organic material
Abstract
The invention discloses a cat urine pH indicating material, a pH indicating cat litter and a preparation method thereof, wherein the cat urine pH indicating material takes one or more of common bean curd residue, common starch, starch fiber, modified starch, plant fiber, dextrin and flour as a carrier, and contains a pH value mixed indicator accounting for 0.001-2 wt% of the total weight of the pH value indicating material, and the pH value mixed indicator comprises m-methyl red or methyl red and an indicator A in a weight ratio of 1 (1-15). The pH indicating cat litter consists of a pH indicating material and basic bean curd cat litter, wherein the pH indicating material accounts for 1-100 wt% of the total weight of the cat litter. Because the consistency of the pH indicating material carrier and the basic cat litter in the material is ensured, the pH indicating material in the bean curd cat litter product is uniformly distributed, and the pH value of cat urine can be instantly, accurately and stably indicated. The preparation method has the advantages of low production cost, no toxicity, no radioactivity, simple and easy preparation process, no dust, good degradability, convenient use, environmental protection and the like.
Description
Technical Field
The invention relates to a pH indicating material and pH indicating cat litter capable of indicating whether the urine pH value of a mammal pet (especially a cat) is within a normal range and a preparation method thereof.
Background
According to the research of animal research institutions at home and abroad, the lower urinary tract diseases of the kitten are the first high-incidence diseases of the kitten in the last decade. Thus, lower urinary tract health is one of the topics closely related to the quality of life of cats. The pH value of urine directly influences the health of the cat, normal urine is weakly acidic, and the pH value is 6.0-6.5. Urine pH of many diseased cats shifts away from the normal range toward acidic or basic. A common cause of abnormal urine pH is feline lower urinary tract disease or feline urinary system syndrome. Urine with a higher pH is prone to magnesium crystal formation, and urine with a lower pH is prone to calcium crystal formation. Therefore, the health status of the cat can be predicted by examining the pH of the cat's urine to allow the pet owner to make an early prediction of certain diseases in the cat.
US6162646 provides a base cat litter material (such as bentonite) to which is added a pH indicator material based on a polymeric foam (particularly polyurethane) to detect acidic or basic cat urine for the purpose of preventing lower urinary tract disease in cats. EP0569232 discloses a cat litter with pH indicating function, which comprises bentonite material and pH indicating material prepared by adding non-water-absorbing calcium carbonate marble piece, granite piece or non-water-soluble polymer material (such as highly cross-linked sodium polyacrylate) as base material into bentonite material, and bonding dye for pH indication with matrix material by water-soluble polymer. Of such indicator materials, the patent specifically teaches that the base material is preferably a non-water absorbent, light reflective inert carrier, such that the pH indicating dye can be readily encapsulated by the water soluble polymer and retained on the outer surface of the inert carrier (base) material; if a water-absorbent base material is used, the water-soluble polymer and the water-soluble pH indicating dye are incorporated into the base material and wasted. Since this patent recommends the use of a non-absorbent matrix material, the water-soluble polymer, after drying, acts as a binder coating to immobilize the pH indicator dye.
The basic cat litter selected in the above two patents is bentonite, and the matrix of the pH indicating material is plastic foam, highly crosslinked sodium polyacrylate polymer material or marble, and granite flake as a carrier. The disadvantage of bentonite is that urine can stick to the cat after being wetted, and bentonite can have ion exchange with urine, possibly affecting the accuracy of pH indication. The polymer material has the function of adsorbing the cat urine, but the water-soluble polymer and/or the water-soluble pH indicating dye can enter the matrix material to cause waste due to the fact that the polymer material is opaque. Although marbles, granites and the like have the advantage of stable chemical properties, the marbles, granites and the like cannot adsorb urine, the urine can directly permeate a large amount of bentonite around the cat after the cat urinates, the bentonite is agglomerated immediately due to water absorption, and the pH indicating materials occupying a small number are wrapped, so that the overall color development and color changing effect of the cat litter are influenced, and even the method of manually scattering the pH indicating materials on the surface of the cat litter has to be adopted, but the problem brought by the way is that the cat urinates the urine which is buried after one time, and the pH indicating materials on the surface are buried in the bentonite to cause waste. And the pH indicating material disclosed by the above two patents and the basic cat litter have different densities due to different materials, so that the pH indicating material in the cat litter is not uniformly distributed, and the overall color development and color change effects of the cat litter are also influenced. International patent WO2014146287a1 provides a pH indicating cat litter material (such as silica) which has a manufacturing process that the color is obvious, but a water-soluble polymer material of the cat litter material has poor caking property when meeting urine, so that the color-developed urine and the cat litter do not conglomerate and cannot be thoroughly cleaned, and thus, the customer consumption experience is poor and no practicability is realized. The paper cat litter with the paper pH indicating function manufactured by Iris Ohyama Inc. in Japan has the same problems as the bentonite cat litter in the paper material of the basic cat litter, and the paper material has the defects that the material can be subjected to ion exchange with urine, the accuracy of pH indication can be influenced, and the product color development is taken as a reference only when the urine contacts the cat litter for 4 hours, so that the accuracy and the practicability are greatly influenced.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a cat urine pH indicating material, a cat litter with a pH indicating function and a preparation method thereof, wherein the cat litter product is uniform in pH indicating material distribution, can instantly, accurately and stably indicate the pH value of cat urine, each pH value of 4-10 has a corresponding color, and the color development is maintained for more than 48 hours.
In order to solve the technical problem, the invention provides a pH indicating material for cat urine, which is characterized by comprising a carrier and a pH mixed indicator; the pH mixed indicator accounts for 0.001-2 wt% of the total weight of the pH indicating material, and comprises m-methyl red or methyl red and an indicator A; wherein the mass ratio of the m-methyl red or the methyl red to the indicator A is 1 (1-15);
the carrier is any one or more of common bean curd residue, common starch, starch fiber, modified starch, plant fiber, dextrin and flour;
the indicator A is any one or a mixture of several of phenol red, cresol red, bromocresol purple, p-bromobenzene sulfonyl chloride, congo red, methyl orange, bromochlorophenol blue, p-ethoxy chrysanthemum orange, naphthalene red, bromocresol green, tetrabromophenol blue, resorcinol blue, litmus, chlorophenol red, benzoyl G, litmus essence, bromophenol red, tetrabromophenol sulfone phenolphthalein, neutral red, m-cresol, 2, 4-dinitrobenzene acetate, gold lotus orange, thymol blue, o-cresol phthalein, thymolphthalein, nile blue, curcumin, dimethylaminoazobenzene, m-aminoxanthine, methyl violet 6B, resinoid azulene, xylenol blue, bromothymol blue, thymol blue, acidic m-aminoxanthine, nitroxanthine, dantan yellow, fluorescent orange red, 4-nitrobenzoic azo-1-naphthol-3.6-disulfonic acid sodium.
Preferably, the pH mixed indicator accounts for 0.002-1.5 wt% of the total weight of the pH indicating material.
Preferably, the requirements of the carrier are: water content less than or equal to 14.0%, protein less than or equal to 0.45(DS), fat less than or equal to 0.15(DS), ash less than or equal to 0.15(DS), sulfur dioxide less than or equal to 30.0mg/kg, fineness more than or equal to 100 meshes, whiteness more than or equal to 87.0%, and spots less than or equal to 0.7/cm2The acidity is less than or equal to 1.80 OT/(DS).
Preferably, the common starch is any one or more of potato starch, corn starch, sweet potato starch, pea starch, mung bean powder and lotus root starch.
The invention also provides the pH indicating cat litter which is characterized by comprising the basic bean curd cat litter and the cat urine pH indicating material, wherein the cat urine pH indicating material accounts for 1-100 wt% of the total weight of the cat litter.
Preferably, the cat urine pH indicating material accounts for 2-20 wt% of the total weight of the cat litter.
Preferably, the basic tofu cat litter is any one or a mixture of several of common tofu dregs, common starch, starch fiber, modified starch, plant fiber, dextrin and flour. The common bean curd residue, the common starch, the modified starch, the plant fiber, the dextrin and the flour in the carrier of the basic bean curd cat litter and the pH indicating material of the cat urine can be the same or different in technical requirements.
More preferably, the base tofu litter is of the same size as the common tofu lees, common starch, starch fiber, modified starch, vegetable fiber, dextrin and flour in the carrier of the cat urine pH indicating material.
The invention also provides a preparation method of the pH indication cat litter, which is characterized by comprising the following steps:
step 1: stirring and uniformly mixing any one or more of common bean curd residue, common starch, starch fiber, modified starch, plant fiber, dextrin and flour, granulating by using a cat litter granulator, and drying to obtain basic bean curd cat litter with the moisture content of 7-17 wt%;
step 2: dissolving m-methyl red or methyl red and indicator A into an alkali solution to prepare a dip dyeing solution,
the total weight concentration of the metacresol red or metacresol red and the indicator A in the dip dyeing solution is 0.05-1.5 wt%;
and step 3: soaking any one or a mixture of more of common bean curd residue, common starch, starch fiber, modified starch, plant fiber, dextrin and flour into the dip-dyeing solution obtained in the step (2) for dip-dyeing for 3-8 h, then taking out, pressing the granules in a granule manufacturing machine, and drying to obtain a cat urine pH indicating material with the moisture content of less than 10 wt%;
and 4, step 4: and (3) mixing the cat urine pH indicating material obtained in the step (3) with the basic bean curd cat litter obtained in the step (1) to obtain the pH indicating cat litter.
Preferably, the diameter of the basic bean curd cat litter particles in the step 1 is 1-5 mm, and more preferably 1.5-3.5 mm.
Preferably, the water content of the base bean curd cat litter in the step 1 is 8-15 wt%, and more preferably 9-12 wt%.
Preferably, in the step 1 and the step 3, the drying temperature is 80-140 ℃, the pH value changes along with the drying temperature, and the cat litter indicates that the appearance of the cat litter is light green or orange, so that the color development accuracy is ensured.
Preferably, in the step 2, the alkali solution is 0.1 wt% sodium hydroxide solution.
Preferably, in the step 4, the cat urine pH indicating material accounts for 1-20 wt% of the total weight of the pH indicating cat litter.
The principle of the invention is as follows:
when using the tofu litter containing a pH indicating material of the present invention, the problematic acidic pH of the pet urine is below about 6.0, e.g., 5.0, and the m-methyl red changes from yellow to orange. Thus, an orange-yellow appearance indicates that the cat excretes problematic acidic urine. When the urine of the pet in question is at an alkaline pH, indicating that the cat may develop urologic syndrome, for example, when pH is 7.0 to 8.0, indicator A changes from yellow to green or blue, and when yellow metacrylic red is added, the pH mixed indicator will appear dark green to dark blue.
Compared with the prior art, the invention has the beneficial effects that:
(1) the pH indicating cat litter has a caking effect when in use, overcomes the defects of the existing pH indicating cat litter, and the carrier and the basic cat litter in the pH indicating material are made of the same material, namely bean curd residue, starch, plant fiber and the like, so that the two materials are dispersed more uniformly. And because the scientific and professional preparation process enables the product to have stable chemical properties, the product does not have obvious ion exchange properties like bentonite and paper cat litter, and has no practical value like poor caking property of silica cat litter, the pH value of cat urine cannot be interfered, the test accuracy and accuracy are improved, the instant color development and the high timeliness color development are maintained for more than 48 hours, the environment is protected and safe, the natural dust-free plant degradation material is selected as the material, the bean curd cat litter caking can be directly flushed with a toilet bowl, the water dissolution and the decomposition are rapid, the degradation and the environment protection are convenient, and the user experience is greatly improved.
(2) The pH indicating material in the pH indicating cat litter is bean curd residue, starch and plant fiber loaded with a pH indicator. One of the indicators undergoes a significant color change when tested for solutions having a pH of less than 5.0 and the other indicator undergoes a significant color change when tested for solutions having a pH of greater than 7.0. Especially as a litter additive to indicate that the urine is at an acidic pH (pH below about 5.6) or to indicate urinary system syndrome in cats (pH at 7.4 or above).
(3) When urine contacts the pH indicating tofu litter of the present invention, it is absorbed by the pH indicating material uniformly dispersed therein and contacts the pH mixing indicator loaded on its surface and a small portion of it enters the interior thereof, thereby indicating the pH of the urine of the cat. Urine at different pH values will cause the pH indicating material to exhibit different colors. The starch in the invention can ensure that the pH mixed indicator is uniformly dispersed in the solution during preparation, and can improve the expansion rate and water absorption of the pH indicating material, thereby increasing the adsorption effect of the terminal product, not generating dust, and having uniform and quick dyeing.
(4) The tofu litter containing a pH indicating material of the present invention has significant advantages. The consistency of the pH indicating material carrier and the basic cat litter in the material is ensured, so that the pH indicating material in the cat litter product is uniformly distributed, and the pH value of cat urine can be instantly, accurately and stably indicated; the pH indicating material is more obvious in color indication, the color is changed from light yellow to orange yellow from the color with the corresponding color pH value of less than or equal to 5.0 at each pH value of 4-10, the color is light yellow to light green when the pH value is between 5.0 and 7.0, and the color is light green to dark blue when the pH value is more than or equal to 7.0; the product of the invention has low production cost, no toxicity, no radioactivity, simple and easy preparation process, no dust, convenience, practicability and environmental protection.
Drawings
FIG. 1 is a standard pH colorimetric card according to the present invention;
FIG. 2 is a color development contrast diagram of the pH value of 4-10 of the pH indicating material for the cat urine prepared in example 1;
FIG. 3 is a color development of the pH indicating cat litter prepared in example 1 at pH4, 7, 10 for 1-48 h; wherein a is a color rendering of 1h, b is a color rendering of 12h, c is a color rendering of 24h, and d is a color rendering of 48 h.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The reagents and materials used in the examples of the present invention are commercially available as follows: methyl red: CAS [493-52-7] Biotechnology engineering (Shanghai) Inc.; m-methyl red: CAS 20691-84-3, Biotechnology engineering (Shanghai) GmbH; corn starch and pea flour: cigarette counter two tower food products limited; the indicator a materials were all purchased from bio-engineering (shanghai) gmbh.
Example 1
The embodiment provides a pH indicating cat litter, which is prepared by the following specific method:
step 1: dehydrating fresh wet pea dregs (containing 75% of 50KG of water), 25KG of pea fibers and 50KG of wet pea dregs by a centrifugal dehydrator to obtain 25KG of wet pea dregs containing 40% of water, mixing the wet pea dregs with 25KG of dry pea fibers, stirring, preparing into long-strip particles with the diameter of 2-3 mm by using a cat litter granulator, and drying the moisture at 100 ℃ until the moisture content is below 10 wt% to obtain the basic bean curd cat litter;
step 2: dissolving 2.5g of m-methyl red, 8.0g of bromothymol blue, 5.0g of thymol blue, 3.0g of acidic m-amine yellow, 5.0g of bromocresol green, 1.2g of nitrazexanthin, 4.0g of o-cresol phthalide, 0.3g of phenolphthalide, 8.0g of p-nitroazo sodium salicylate, 4.0g of danhuang, 2.0g of fluorescent orange red and 0.1g of 5% solution of 4-nitrobenzazo-1-naphthol-3.6-disulfonic acid sodium in 10Kg of 30% ethanol aqueous solution to prepare a dip dyeing solution (refer to patent document CN 201110420648);
and step 3: soaking 5kg of corn starch into 5L of the dip dyeing solution obtained in the step 2 for 8 hours, taking out, pressing the corn starch into granules in a granule making machine, and drying the corn starch until the moisture content is below 10 wt% at 100 ℃ to obtain a cat urine pH indicating material;
and 4, step 4: and (3) mixing the cat urine pH indicating material obtained in the step (3) with the basic bean curd cat litter obtained in the step (1) to obtain the pH indicating cat litter, wherein the mass fraction of the cat urine pH indicating material is 5 wt%.
Wherein, the specification requirements of the corn starch in the step 3 are as follows: water content less than or equal to 14.0%, protein less than or equal to 0.45(DS), fat less than or equal to 0.15(DS), ash less than or equal to 0.15(DS), sulfur dioxide less than or equal to 30.0mg/kg, fineness more than or equal to 100 meshes, whiteness more than or equal to 87.0%, and spots less than or equal to 0.7/cm2The acidity is less than or equal to 1.80 OT/(DS).
Using pH buffers with pH values of 4, 5, 6, 7, 8, 9 and 10, which are prepared from disodium hydrogen phosphate and citric acid, respectively, dropwise adding the pH buffers on the pH indicating material of the cat urine obtained in the step 3 of the example 1 to develop color and compare the color with a pH value standard color card (figure 1), wherein the result is shown in figure 2, the color is changed from light yellow to orange yellow when the pH is less than or equal to 5.0, the color is changed from light yellow to light green when the pH is between 5.0 and 7.0, and the color is changed from light green to dark blue when the pH is more than or equal to 7.0;
the final pH-indicating cat litter obtained in example 1 was added dropwise with pH buffers of pH4, 7, and 10, respectively, to develop color, and photographed and compared at 1h, 12h, 24h, and 48h, respectively, as shown in FIG. 3, where a is a color development chart of 1h, b is a color development chart of 12h, c is a color development chart of 24h, d is a color development chart of 48h, pH4 shows light yellow, pH7 shows yellow green, pH10 shows dark blue, and the contrast found that the pH-indicating cat litter can maintain stable color development within 48 h.
Example 2
The embodiment provides a pH indicating cat litter, which is prepared by the following specific method:
step 1: dehydrating fresh wet pea dregs (containing 75% of 50KG of water), 25KG of pea fibers and 50KG of wet pea dregs by a centrifugal dehydrator to obtain 25KG of wet pea dregs containing 40% of water, mixing the wet pea dregs with 25KG of dry pea fibers, stirring, preparing into long-strip particles with the diameter of 2-3 mm by using a cat litter granulator, and drying the moisture at 100 ℃ until the moisture content is below 10 wt% to obtain the basic bean curd cat litter;
step 2: dissolving 2.5g of m-methyl red, 8.0g of bromothymol blue, 5.0g of thymol blue, 3.0g of acidic m-amine yellow, 5.0g of bromocresol green, 1.2g of nitrazexanthin, 4.0g of o-cresol phthalide, 0.3g of phenolphthalide, 8.0g of p-nitroazo sodium salicylate, 4.0g of danhuang, 2.0g of fluorescent orange red and 0.1g of 5% solution of 4-nitrobenzazo-1-naphthol-3.6-disulfonic acid sodium in 10Kg of 30% ethanol aqueous solution to prepare a dip dyeing solution (refer to patent document CN 201110420648);
and step 3: soaking 5kg of pea powder into 5L of the dip dyeing solution obtained in the step 2 for 8h, taking out, pressing the pea powder into particles in a particle manufacturing machine, and drying the pea powder at 140 ℃ until the moisture content is below 10 wt% to obtain a cat urine pH indicating material;
and 4, step 4: and (3) mixing the cat urine pH indicating material obtained in the step (3) with the basic bean curd cat litter obtained in the step (1) to obtain the pH indicating cat litter, wherein the mass fraction of the cat urine pH indicating material is 20 wt%.
Wherein, the specification requirements of the pea flour in the step 3 are as follows: water content less than or equal to 14.0%, protein less than or equal to 0.45(DS), fat less than or equal to 0.15(DS), ash less than or equal to 0.15(DS), sulfur dioxide less than or equal to 30.0mg/kg, fineness more than or equal to 100 meshes, whiteness more than or equal to 87.0%, and spots less than or equal to 0.7/cm2The acidity is less than or equal to 1.80 OT/(DS).
Example 3
The embodiment provides a pH indicating cat litter, which is prepared by the following specific method:
step 1: dehydrating fresh wet pea dregs (containing 75% of 50KG of water), 25KG of pea fibers and 50KG of wet pea dregs by a centrifugal dehydrator to obtain 25KG of wet pea dregs containing 40% of water, mixing the wet pea dregs with 25KG of dry pea fibers, stirring, preparing into long-strip particles with the diameter of 2-3 mm by using a cat litter granulator, and drying the moisture at 100 ℃ until the moisture content is below 10 wt% to obtain the basic bean curd cat litter;
step 2: dissolving 2.5g of m-methyl red, 8.0g of bromothymol blue, 5.0g of thymol blue, 3.0g of acidic m-amine yellow, 5.0g of bromocresol green, 1.2g of nitrazexanthin, 4.0g of o-cresol phthalide, 0.3g of phenolphthalide, 8.0g of p-nitroazo sodium salicylate, 4.0g of danhuang, 2.0g of fluorescent orange red and 0.1g of 5% solution of 4-nitrobenzazo-1-naphthol-3.6-disulfonic acid sodium in 10Kg of 30% ethanol aqueous solution to prepare a dip dyeing solution (refer to patent document CN 201110420648);
and step 3: dehydrating fresh wet pea dregs (containing 75 percent of 10KG water weight), 5KG of pea fibers and 10KG of wet pea dregs by a centrifugal dehydrator to obtain 5KG of wet pea dregs containing 40 percent of water weight, mixing the wet pea dregs with 5KG of dry pea fibers, immersing the mixture into 10L of the dip-dyeing solution obtained in the step 2 for dip-dyeing for 8 hours, taking out the mixture, putting the mixture into a single-horizontal-shaft mixer for uniform stirring, and then conveying the mixture to a single-screw temperature-controlled extrusion granulator to allow the mixture to pass through a double-hole die head. Cutting into granules with length of about 10mm by an automatic cutting device, wherein the granule aperture is 2mm, the granule width is 12mm, conveying the granules to a belt type dryer by a conveyor belt, controlling the drying temperature of the dryer at 100 ℃, drying for 85min, discharging, cooling by a fan to normal temperature to obtain a cat urine pH indicating material with water content below 10%;
and 4, step 4: and (3) mixing the cat urine pH indicating material obtained in the step (3) with the basic bean curd cat litter obtained in the step (1) to obtain the pH indicating cat litter, wherein the mass fraction of the cat urine pH indicating material is 50 wt%.
Example 4
The embodiment provides a pH indicating cat litter, which is prepared by the following specific method:
step 1: squeezing and dehydrating 50Kg of fresh soybean dregs (with the water content of 80 wt%) to 25Kg of wet soybean dregs with the water content of 5 wt% by using a hydraulic dehydrator, adding 25Kg of sweet potato starch, putting the mixture into a single horizontal shaft type stirrer to be uniformly mixed, preparing long-strip particles with the diameter of 2-3 mm by using a cat litter granulator after stirring, and drying the water at 100 ℃ until the water content is below 10 wt% to obtain the basic bean curd cat litter;
step 2: dissolving 2.5g of m-methyl red, 8.0g of bromothymol blue, 5.0g of thymol blue, 3.0g of acidic m-amine yellow, 5.0g of bromocresol green, 1.2g of nitrazexanthin, 4.0g of o-cresol phthalide, 0.3g of phenolphthalide, 8.0g of p-nitroazo sodium salicylate, 4.0g of danhuang, 2.0g of fluorescent orange red and 0.1g of 5% solution of 4-nitrobenzazo-1-naphthol-3.6-disulfonic acid sodium in 10Kg of 30% ethanol aqueous solution to prepare a dip dyeing solution (refer to patent document CN 201110420648);
and step 3: squeezing and dehydrating 10Kg of fresh soybean dregs (with the water content of 80 wt%) to 5Kg of wet soybean dregs with the water content of 55 wt% by using a hydraulic dehydrator, adding 5Kg of sweet potato starch, putting the mixture into a single horizontal shaft type stirrer to be uniformly mixed, immersing the mixture into 10L of the dip-dyeing solution obtained in the step 2 for dip-dyeing for 8 hours, taking out the mixture, putting the mixture into the single horizontal shaft type stirrer to be uniformly stirred, feeding the raw materials into a double-screw temperature control extruder by a feeder, adding a cooling device, controlling the temperature of a screw to be 70 ℃, allowing the materials to pass through a single-hole die, cutting the materials into single-hole particles with the length of 10mm, the outer diameter of 6mm and the aperture of 1.8mm by using an automatic extruder cutting device, conveying the particles to a belt type dryer, controlling the drying temperature of the dryer to be 90 ℃, drying for 85min, and naturally cooling to the normal temperature to obtain a;
and 4, step 4: and (3) mixing the cat urine pH indicating material obtained in the step (3) with the basic bean curd cat litter obtained in the step (1) to obtain the pH indicating cat litter. Wherein the mass fraction of the cat urine pH indicating material is 75 wt%.
Claims (10)
1. A pH indicating material for cat urine, which is characterized by comprising a carrier and a pH mixed indicator; the pH mixed indicator accounts for 0.001-2 wt% of the total weight of the pH indicating material, and comprises m-methyl red or methyl red and an indicator A; wherein the mass ratio of the m-methyl red or the methyl red to the indicator A is 1 (1-15);
the carrier is any one or more of common bean curd residue, common starch, starch fiber, modified starch, plant fiber, dextrin and flour;
the indicator A is any one or a mixture of several of phenol red, cresol red, bromocresol purple, p-bromobenzene sulfonyl chloride, congo red, methyl orange, bromochlorophenol blue, p-ethoxy chrysanthemum orange, naphthalene red, bromocresol green, tetrabromophenol blue, resorcinol blue, litmus, chlorophenol red, benzoyl G, litmus essence, bromophenol red, tetrabromophenol sulfone phenolphthalein, neutral red, m-cresol, 2, 4-dinitrobenzene acetate, gold lotus orange, thymol blue, o-cresol phthalein, thymolphthalein, nile blue, curcumin, dimethylaminoazobenzene, m-aminoxanthine, methyl violet 6B, resinoid azulene, xylenol blue, bromothymol blue, thymol blue, acidic m-aminoxanthine, nitroxanthine, dantan yellow, fluorescent orange red, 4-nitrobenzoic azo-1-naphthol-3.6-disulfonic acid sodium.
2. The pH indicating material of claim 1, wherein the pH mixing indicator is 0.002 to 1.5 wt% of the total weight of the pH indicating material.
3. The feline urine pH indicating material of claim 1 wherein the carrier requirements are: water content less than or equal to 14.0%, protein less than or equal to 0.45(DS), fat less than or equal to 0.15(DS), ash less than or equal to 0.15(DS), sulfur dioxide less than or equal to 30.0mg/kg, fineness more than or equal to 100 meshes, whiteness more than or equal to 87.0%, and spots less than or equal to 0.7/cm2Acidity of the solution
≤1.80OT/(DS)。
4. The pH indicator material according to claim 1, wherein the common starch is any one or more of potato starch, corn starch, sweet potato starch, pea starch, mung bean powder and lotus root starch.
5. A pH indicating cat litter comprising a base tofu litter and the cat urine pH indicating material of any one of claims 1 to 4, wherein the cat urine pH indicating material is 1 to 100 wt% of the total weight of the cat litter.
6. The pH-indicating cat litter of claim 5 wherein the cat urine pH-indicating material comprises from 2 to 20 wt% of the total weight of the cat litter.
7. The pH-indicating cat litter according to claim 5 wherein the base tofu litter is any one or a mixture of common tofu lees, common starch, starch fiber, modified starch, vegetable fiber, dextrin and flour.
8. The method for preparing the pH indicating cat litter according to any one of claims 5 to 7, comprising the steps of:
step 1: stirring and uniformly mixing any one or more of common bean curd residue, common starch, starch fiber modified starch, plant fiber, dextrin and flour, granulating by using a cat litter granulator, and drying to obtain basic bean curd cat litter with the water content of 7-17 wt%;
step 2: dissolving the m-methyl red or the methyl red and the indicator A into an alkali solution to prepare a dip dyeing solution, wherein the total weight concentration of the m-methyl red or the methyl red and the indicator A in the dip dyeing solution is 0.05-1.5 wt%;
and step 3: soaking any one or a mixture of more of common bean curd residue, common starch, starch fiber, modified starch, plant fiber, dextrin and flour into the dip-dyeing solution obtained in the step (2) for dip-dyeing for 3-8 h, then taking out, pressing the granules in a granule manufacturing machine, and drying to obtain a cat urine pH indicating material with the moisture content of less than 10 wt%;
and 4, step 4: and (3) mixing the cat urine pH indicating material obtained in the step (3) with the basic bean curd cat litter obtained in the step (1) to obtain the pH indicating cat litter.
9. The method for preparing pH-indicating cat litter according to claim 8 wherein the moisture content in the base tofu cat litter of step 1 is 8-15 wt%.
10. The method for preparing the pH indicating cat litter of claim 8 wherein the cat urine pH indicating material in step 4 accounts for 1-20 wt% of the total weight of the pH indicating cat litter.
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| CN111492987A (en) * | 2020-04-27 | 2020-08-07 | 宠宇生物科技(江苏)有限公司 | Degradable bean curd cat litter and preparation method thereof |
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