JPH1189468A - Pet toilet sand - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a toilet sand for a pet excellent in lightness, water- absorption, deodorant properties, treatability and solidifying properties by constituting the toilet sand out of a granulated material of a composition comprising a specific amount of a specific allophane-based clayey mineral, a smectite-group clayey mineral, etc. SOLUTION: This toilet sand consists of a granulated material of a composition comprising 50-95 wt.% allophane-based clayey mineral containing 0.5-6.0 wt.% iron component (Fe2 O3 ) in terms of dry base, and having 250-600 g/L packing density, >=50 m<2> /g specific area and composition of 1.0-4.5 molar ratio of SiO2 /Al2 O3 , and 5-50 wt.% one or more kinds of components selected from a group consisting of a smectite-group clayey mineral and hormite-group clayey mineral. The granular material A is preferably blended with a granular material B of a swellable clayey mineral in the weight ratio of the components A/B regulated so as to be (10-50)/(50-90) to prepare the objective toilet sand for the pet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pet litter with reduced weight, and more particularly, to a pet litter with reduced weight and excellent water absorbency, solidifying property and deodorizing property.

[0002]

2. Description of the Related Art When breeding pets such as cats, pet toilet sand has been used for a long time to treat urine and the like discharged from the pets. Various types of pet toilet sand are used, and examples thereof include natural zeolites, river sand, silica gel, newsprint, and paper sludge molded products.

It has long been known to use bentonite for pet toilet sand.
No. 9440 discloses a swellable clay mineral (smectite)
And toilet sand for pets, which are used together with a deodorant. Japanese Patent No. 2572208 discloses an excretion box containing an absorbent composition comprising an injection-molded smectite clay (containing sodium bentonite) containing a water-soluble adhesive substance. Further, Japanese Patent No. 2587530 describes a litter box using incompressible and unfired water-swellable sodium bentonite as an absorbent composition.

On the other hand, it has long been known that Kanuma soil (Allophane) has a deodorizing effect.
JP-A-164-164 describes a deodorizing and hygroscopic agent containing porous calcined allophane as an active ingredient.
Japanese Patent Application Laid-Open No. H11-163,086 describes that diatomaceous earth, shirasu balloon, perlite, zeolite, and Kanuma soil and Akadama soil coated with a coating material composed of carbon black and gypsum or cement are used as deodorant porous granular materials.

[0005]

Many of the conventional pet litter for pets are merely filter agents such as sand or have a weak deodorizing function. Despite having water absorption, it is difficult to separate the adsorbed and non-adsorbed portions of urine, and it has been necessary to replace most or all of pet litter after absorbing urine.

On the other hand, swelling clay minerals such as bentonite have the function of causing the urine-adhered portion to swell and agglomerate, whereby only the contaminated portion is solidified and can be easily removed. However, bentonite is not
The specific gravity is heavy, the handling is inconvenient, and the deodorizing ability is not yet sufficient.

[0007] Pet litter made of paper has low specific gravity and is easy to handle, but on the other hand, it may adhere to the soles of pets or spill out of containers due to its lightness and properties. However, there are drawbacks such as dispersing filth into the room.

Accordingly, an object of the present invention is to provide pet toilet sand which is excellent in lightness and excellent in water absorption, deodorization, handling, and solidification.

[0009]

According to the present invention, 50 to 95% by weight of an allophane-based clay mineral containing 0.5 to 6.0% by weight of iron (Fe ₂ O ₃ ) on a dry basis, and smectite 5 to 50% by weight of at least one component selected from the group consisting of a group III clay mineral and a formite group clay mineral
And a pet toilet sand comprising a granulated product of the above composition.

According to the present invention, (A) on a dry basis
0.5 to 6.0% by weight of iron (Fe _TwoO_Three) Containing
50-95% by weight of allophane clay mineral and Smecta
A group consisting of the itite clay minerals and the holmite clay minerals
5 to 50% by weight of at least one selected ingredient
The granulated product of the composition and the granulated product of (B) the swellable clay mineral
(A) :( B) = weight ratio of 10 to 50:50 to 90
Pet litter, characterized by blending with
Provided.

In the present invention: 250-750 g of allophane clay mineral granules
/ L of packing density; Allophane clay mineral is at least 50 m ² / g, especially 1
^{2. It} has a specific surface area of 00 to 400 m ² / g; It is preferable that the allophane-based clay mineral has a composition in which the molar ratio of SiO ₂ / Al ₂ O ₃ is 1.0 to 4.5.

[0012]

DETAILED DESCRIPTION OF THE INVENTION

[Action] In the present invention, among allophane clay minerals,
0.5 to 6.0 wt% iron (Fe ₂ O) on a dry basis
Use the one containing ₃ ). Allophane (allo
Phane) is a general term for amorphous (amorphous) hydrous aluminum silicate clay mineral, and is easily available as Kanuma soil.

It has long been known that allophane-based clay minerals have deodorizing performance. However, those containing iron have a wide deodorizing spectrum, and for example, have a static deodorizing capacity against hydrogen sulfide. 39.6 mg / g, the static deodorizing capacity for ammonia is 13.4 mg / g, and the static deodorizing capacity for bentonite for hydrogen sulfide is 1 mg / g.
Hereinafter, the static deodorizing capacity for ammonia is 5.3 mg /
g, which is remarkably excellent. Further, as can be seen from Comparative Example 4 described later, an allophane-based clay mineral having an iron content lower than the above range has extremely poor deodorizing performance against hydrogen sulfide.

Further, the allophane-based clay mineral has a feature that it can store a large amount of water in relation to the chemical structure of gelled aluminum silicate. That is, this allophane-based clay mineral generally has the advantage that it does not become muddy even when it contains 20 to 80% by weight of water on a dry basis, and does not lose its properties as a powder.

Further, in connection with the above chemical structure, the allophane clay mineral has a packing density of 250 to 650.
g / L and the packing density of bentonite is generally 750
It can be seen that the pet toilet sand can be significantly reduced in weight as compared with a high level of up to 900 g / L.

However, allophane clay minerals are:
Even if this is granulated, the particles tend to break down remarkably, have low particle strength, lack smoothness and fluidity, and have difficulty in handling as pet toilet sand.

In the present invention, based on the following two components, the allophane clay mineral is 50 to 95% by weight, particularly 70 to 95% by weight.
% By weight and at least one component 5 selected from the group consisting of smectite group clay minerals and formite group clay minerals
By mixing this composition with 50 to 50% by weight, especially 5 to 30% by weight, and granulating this composition, it is possible to increase the particle strength, improve the smoothness, fluidity, etc., and use it as pet toilet sand. It became possible to improve the handleability of.

In the present invention, the smectite group clay mineral and the formite group clay mineral are not only an excellent granulating medium for the allophane clay mineral, but also have an additive or synergistic advantage as pet toilet sand. . That is, the smectite group clay mineral is a layered clay mineral,
It has swelling properties and improves the water absorption and solidification of pet litter. On the other hand, the formite group clay mineral is a chain clay mineral, and increases the water absorbing and deodorizing performance. Of course, by using the smectite group clay mineral and the formite group clay mineral together, it is possible to obtain pet toilet sand excellent in overall performance.

In a preferred embodiment of the present invention, (A) 10 to 50 parts by weight, particularly 2
0 to 50 parts by weight, and (B) granulated material 5 of swellable clay mineral
0 to 90 parts by weight, especially 50 to 80 parts by weight (total 10
0 parts by weight) to make pet litter.

In this embodiment, the components (A) and (B) share the functions, resulting in pet litter having excellent overall characteristics. That is, the granules of the allophane-based clay mineral contribute to deodorization, water absorption, weight reduction, etc., and the granules of the swelling clay mineral contribute to water absorption, solidification, etc., and these are synthesized. All the required characteristics will be satisfied. In particular, in the blend of the present invention, in the portion where urine is absorbed, swelling and solidification occurs in a form incorporating granules of allophane-based clay minerals, so that this portion can be easily separated from unused portions. It becomes possible to dispose, and the effective and economical use of pet toilet sand becomes possible.

[Allophane-based clay mineral] In the present invention, among allophane-based clay minerals, iron (F) having a dry basis of 0.5 to 6.0% by weight, particularly 2.0 to 4.0% by weight, is used.
e ₂ O ₃ ). Allophane is
As already pointed out, it is an amorphous (amorphous) hydrated aluminum silicate clay mineral and can be easily obtained in Japan as Kanuma soil.

The Kanuma soil is a porous weathered pumice made of pale yellow to yellow pumice grains having a diameter of 1 to 3 cm and produced from the Kanuma area of Tochigi prefecture. There is a good property. In addition, this Kanuma soil is very fragile and has the property that it becomes powder with a small force. The allophane content of this Kanuma soil is generally 62
６５65%, and the molar ratio of SiO ₂ / Al ₂ O ₃ is 1.
It is in the range of 0 to 4.5.

An example of the composition of Kanuma soil is shown in Table 1 below.

[Table 1]

In the present invention, the above-mentioned Kanuma soil can be used as it is. However, it is preferable to use stone, sand, quartz, etc. separated and purified by elutriation. By this refining treatment, the specific surface area of the allophane clay mineral is considerably improved, and the deodorizing performance is also improved.

In the present invention, the specific surface area by the BET method is 5
It is preferable to use one having a range of 0 m ² / g or more, particularly 100 to 400 m ² / g, from the viewpoint of weight reduction, deodorant performance and water absorption.

[Granulation Medium] In the present invention, a smectite group clay mineral or a formite group clay mineral is used as a granulation medium and modifier.

As the smectite group clay mineral, various natural or synthetic smectite clay minerals or chemically modified products thereof are used. For example, montmorillonite,
Examples include smectite group clay minerals such as bentonite, beidellite, nontronite, saponite, hectorite, sauconite, and stevensite. Examples of the chemically modified product include activated clay obtained by activating montmorillonite such as acid clay and the like by acid treatment, activated bentonite obtained by activating montmorillonite such as acid clay and the like by alkali treatment, and the like. Further, activated bentonite and activated clay containing aluminum sulfate are also preferably used.

Smectite is a SiO ₄ tetrahedral layer—Al
The basic structure is a three-layer structure composed of an O ₆ octahedral layer-SiO ₄ tetrahedral layer, or a three-layer structure in which the tetrahedral phase and the octahedral phase are isomorphically substituted with different metals. And cations are present. When water is mixed with this smectite, water enters between the layers of the basic layer (plate-like body) of the layer structure of the smectite and swells, but eventually the basic layer disperses into discrete colloids and flows. State. If this is left, the suction rebound between the basic layers will cause
A card house structure is formed and highly thickened,
Or it is in a gelled state. This is the principle of water absorption and solidification by smectite.

On the other hand, the formite group clay minerals are also called chain clay minerals, and sepiolite and palygorskite belong to this group. This Holmite clay mineral is
Its external shape is fibrous or its convergent body, and its basic structure is a 3-octahedral magnesium silicate clay mineral whose main component forming the skeleton of the octahedral layer is magnesium. This magnesium silicate clay mineral has a three-dimensional chain-like crystal structure, and the pores formed in the fiber between the external shape and the convergent body have a specific surface area of 100 to 600 m ² / g in BET method specific surface area. Has surface area. In addition, because of its convergent structure, it is a porous chain clay mineral having an adsorption action. For this reason, this mineral has excellent binder retention properties and also has a deodorizing effect, and can be easily mixed with various inorganic powders.

Before using these clay minerals as the binder of the present invention, pulverization with a ball mill, a hammer mixer, kneading and pulverization with a super mixer, a grinder or the like,
It is more preferable to use a primary pulverization treatment such as impact pulverization with an atomizer, a jet mill or the like to partially defibrate or loosen the chain structure as a converging body and the lamination structure as a scale before use.

[Granulation of Allophane Clay Mineral] In the present invention, the allophane clay mineral is 50% on a dry basis of the total of two components.
To 95% by weight, especially 70 to 95% by weight, and 5 to 50% by weight, especially 5 to 30% by weight, of the smectite group clay mineral and / or the formite group clay mineral.

If the amount of the allophane clay mineral is less than the above range, it becomes difficult to reduce the weight of pet litter,
Deodorant performance also tends to decrease, while if the amount of the smectite group clay mineral or the formite group clay mineral is less than the above range, the particle strength is reduced, and the handling properties and general properties as pet toilet sand are reduced. Tends to decrease.

Mixing an allophane clay mineral with a smectite group clay mineral and / or a formite group clay mineral,
Granulation is performed by a means known per se. The mixing may be carried out using a light mixing means such as an atomizer, and the granulation may be performed by a known method such as compression molding, tablet compression, tumbling granulation, spray granulation, or extrusion granulation. Granulation method is used. Extrusion granulation is preferred. The granulation is preferably performed in a state that the mixture contains moisture, and generally 20 to 4 parts on a dry matter basis.
It is preferable to carry out in a state containing 5% by weight of water. In general, the water content of the clay mineral itself may be used.

The allophane-based clay mineral granule preferably has a particle size of generally 1 to 10 mm, particularly 2 to 5 mm. Particle shape is spherical, cubic, cylindrical,
Any shape such as a prismatic shape, a granular shape, a tablet shape, and an irregular shape may be used.

The obtained allophane-based clay mineral granules are:
Dry the product as necessary. An appropriate drying temperature is 110 to 170 ° C.

Further, by changing the color of the granulated product, the commercial value can be further increased. To improve the color, the pigment can be contained to such an extent that its performance is not deteriorated. As the pigment used, inorganic pigments are preferable, for example, titanium white, zinc white, antimony white, basic lead sulfate, barium sulfate, lead silicate, carbon black, iron black, red iron, vermilion, graphite, yellow oxide Examples include iron, titanium yellow, litharge, zeolite, hydrotalcite, lithium aluminum, chromium oxide green, cobalt blue, ultramarine, navy blue and the like.

[Blend] In the present invention, the above-mentioned granulated allophane-based clay mineral is used alone as pet toilet sand. 50 parts by weight, especially 20 to 50
Parts by weight, and (B) granulated material of swellable clay mineral 50 to 90
The use of a blend with 50 parts by weight, particularly 50 to 80 parts by weight, results in excellent overall performance.

As the swellable clay mineral, any of the smectite group clay minerals described above can be used, but natural or synthetic bentonite is particularly excellent.

The granular swellable clay mineral is granulated in the same manner as the granules of the allophane clay mineral, and generally has a particle size of 1 to 10 mm, particularly preferably 2 to 5 mm. The particle shape may be any shape such as a sphere, a cube, a column, a prism, a granule, a tablet, and an irregular shape.

A preferred bentonite is Japanese Patent Publication No. 5-736.
No. 89, consisting of activated bentonite, containing montmorillonite as a main component and cristobalite as a minor component, and expressed in a molar ratio of Al ₂ O ₃ / SiO ₂ = 0.095. To 0.16 Na ₂ O / SiO ₂ = 0.8 × 10 ^{−2 to} 4.5 × 10
^-2 MO / SiO ₂ = 4.5 × 10 ^{-2 to} 9.5 × 10 ^-2 (where M is an alkaline earth metal), and the swelling degree by the ACC method is 25 ml / 2 g. As described above, the flow behavior index (n) is 0.53 or less.

(Method of measuring swelling degree by ACC method) 2 g of a sample (having a water content of 4 to 10.0%) is added to a 100-ml graduated cylinder equipped with a stopper containing 100 ml of ion-exchanged water so as to hardly adhere to the inner wall. . After most of the previously added sample has settled, the next sample is added. When the addition is completed, stopper the sample and allow it to stand for 24 hours, and read the apparent volume of the sample deposited in the container. The unit of swelling force is indicated as (ml / 2g).

This activated bentonite has a concentration of 3 g / 1.
To a hydrous acid clay having a pH in the range of 3 to 7 and containing cristobalite measured as 00 ml of a saline slurry, 1 to 5% by weight of solid sodium carbonate in terms of anhydride is added, and the mixture is heated at a temperature of 50 ° C. or more. It is produced by kneading and converting the acid clay into activated bentonite under cristobalite residual conditions.

The above granular activated bentonite is particularly excellent as a component of pet toilet sand in that it absorbs pet urine and the like and solidifies, facilitating the removal of the relevant portion and absorbing the odor to some extent. It is.

In the blend of the present invention, when the blending amount of the allophane clay mineral granules is lower than the above range,
The original purpose of weight reduction is not achieved, and the deodorizing performance tends to decrease. On the other hand, if the amount of the granulated swelling clay mineral is less than the above range, the solidifying performance tends to decrease.

The granulated granules of the allophane clay mineral used in the above-mentioned blend are preferably granulated using a formite group clay mineral as a granulating medium. This is because the granulated product is excellent in deodorizing performance, while the required solidification is provided by the granulated product of the swelling clay mineral.

The pet litter of the blend type of the present invention can be easily obtained by blending the above components with a tumbler, a conical blender or the like.

Other components can be blended with this blend. For example, a phyllosilicate can be blended for further improving the deodorizing performance. Synthetic zinc phyllosilicate, magnesium phyllosilicate, aluminum-containing zinc phyllosilicate, and aluminum-containing magnesium phyllosilicate having a large specific surface area can be used.
Particularly preferred phyllosilicates are described in (1)
No. 10021, a zinc phyllosilicate or an aluminum-containing zinc phyllosilicate having a flypontite type X-ray diffraction image and a BET specific surface area of 100 m ² / g, or (2) Japanese Patent Publication No. 5-79602 Composite phyllosilicates, ie, amorphous and porous silica or silica-alumina, and zinc or magnesium phyllosilicate or aluminum-containing zinc or magnesium phyllosilicate formed on the primary particle surface.

Further, other organic and inorganic deodorants and antibacterial agents can be added to the product of the present invention to such an extent that its performance is not impaired. For example, as a silica inorganic deodorant, white carbon, other wet-process amorphous silica, acid clay, montmorillonite, clay minerals such as flours earth and silica obtained by acid-treating them, as a layered silicate, Magadiite, Kenyaite, Macatite, Ilaite, Kanemite and those obtained by treating them with an acid. Examples of silicates include magnesium silicate, alkaline earth metal silicates such as calcium silicate, and zinc silicate. A Group IIb metal salt of silicic acid can be added.

As aluminosilicates, layered aluminosilicates, in particular various clay minerals, tectosilicates, zeolites such as mordenite, clinoptilolite, faujasite, zeolite A, zeolite X, zeolite Y, zeolite P, analcyme , Sodalite and the like, and zeolite obtained by ion-exchanging these zeolites with antibacterial ions such as silver, copper and zinc can also be added.

As the organic antibacterial agent, a compound in which iodine such as povidone-iodine is supported on the above-mentioned inorganic compound can be blended.

As the phosphate, titanium phosphate, zirconium phosphate, copper phosphate and tin phosphate can be added. In addition, titanium oxide is used to decompose harmful substances adsorbed and to provide antibacterial properties. It is also preferable to mix a photoreactive semiconductor such as

[0052]

The present invention will be described with reference to the following examples. The test method in the present invention was as follows.

(1) Packing density test method JIS. K-6220.6.8. (Iron cylinder method). (2) Particle strength test The pressure resistance of 20 suitable sample grains was measured with a Kiya type strength meter, and the average value was obtained. (3) Deodorizing test method (adsorption capacity) A fixed amount of a sample was weighed in a 1.8-liter closed glass container equipped with a silicon rubber stopper for gas sampling. Next, a certain amount of hydrogen sulfide gas and ammonia gas were added with a syringe, and 24 hours later, the gas concentration in the container was measured with a gas detection tube to calculate the adsorption capacity. In the case of no detection, a certain amount of gas was further added and the measurement was repeated. (4) Sensory deodorization test method 500 ml of each sample is placed in a 6 liter odor collection bottle, and 10 ml of artificial urine odor mixed with ammonia and hydrogen sulfide is injected. After standing for 2 hours, the odor intensity is sensory evaluated by a panel of five persons. The evaluation criteria are shown below. Evaluation points Evaluation criteria 0 Odorless 1 Very slight smell 2 Slight smell 3 Easy smell 4 Strong smell 5 Very strong smell (5) Water absorption test Put 2 g of sample in a 30cc glass container, 8cc of 1% saline solution
Was added. After standing for 1 minute, it was tilted 30 degrees from the horizontal, the state was observed, and the evaluation was made according to the following criteria. ：: No fluidity is shown. ○: Slightly fluidity is shown. △: Liquid outflow ×: Separation into sediment and liquid. (6) Solidification test method A sample is placed in a 300 ml tall beaker to a depth of 6 cm. Put in. From above, 7 ml of 1% saline solution, which is a substitute for urine of the pet, is dropped for 10 seconds to solidify the sample and evaluate the solidification state. The evaluation criteria are shown below. ：: Does not easily collapse even when pressure is applied with fingers. ：: Collapse when pressure is applied with fingers. Δ: Solidified as it is, but collapses when lifted by hand. ×: Does not solidify.

(Example 1) 0.7 kg of commercially available horticultural Kanuma soil and 0.3 kg of sepiolite powder (Aidplus SP manufactured by Mizusawa Chemical) (Kanuma soil: sepiolite = 70: 3)
0) with a kneading extruder 0.3 mm in diameter and 1.0 cm in length
And dried at 160 ° C. for 15 hours to obtain Sample 1. The iron (Fe ₂ O ₃ ) content on a dry basis of Kanuma used (when dried at 110 ° C. for 2 hours) was 3.3 w%, and the specific surface area was 263 m ² / g. Table 1 shows the chemical composition of Sample 1, and Table 2 shows the packing density, particle strength, and deodorizing test results.

(Example 2) Kanuma soil: Sepiolite 9
Sample 2 was obtained in the same manner except that the ratio was changed to 0:10. Table 2 shows the packing density, particle strength, and deodorizing test results of Sample 2.

(Example 3) Kanuma soil: Sepiolite 5
Sample 3 was obtained in the same manner except that the ratio was changed to 5:45. Table 2 shows the packing density, particle strength, and deodorizing test results of Sample 3.

(Example 4) 0.7 kg of commercially available horticultural Kanuma soil and bentonite slurry (solid content: 6%)
0 kg (Kanuma soil: bentonite solid content = 70: 30) was kneaded with an extruder to obtain a columnar pellet having a diameter of 0.3 cm and a length of 1.0 cm. Table 2 shows the packing density, particle strength, and deodorization test results of Sample 4.
Shown in Further, the water absorption, solidification, and functional deodorization tests were measured and are shown in Table 3.

Example 5 A commercially available horticultural Kanuma soil (1.0 kg) was pulverized in a mortar, and the obtained powdery material was stirred and dispersed in 2 liters of water and suspended for about 1 minute. Filter only. The filtered material is Kanuma soil from which heavy parts such as quartz are removed. Sample 5 was obtained in the same manner as in Example 1 using this purified Kanuma soil. Table 2 shows the packing density, particle strength, and deodorizing test results of Sample 5.

Comparative Example 1 0.7 kg of commercially available natural zeolite (#SS: manufactured by Nitto Powder Chemical Co.) and 0.3 kg of sepiolite powder (Aidplus SP manufactured by Mizusawa Chemical) (natural zeolite: sepiolite = 7: 3) Was obtained by a kneading extruder to obtain a columnar pellet having a diameter of 0.3 cm and a length of 1.0 cm, and dried at 160 ° C. for 15 hours to obtain Sample 6. Table 2 shows the packing density, particle strength, and deodorizing test results of Sample 6.

Comparative Example 2 Sample 7 was obtained in the same manner as in Example 1 except that the ratio of Kanuma soil: sepiolite was changed to 98: 2. Table 2 shows the packing density, particle strength, and deodorizing test results of Sample 7. The formed granules had low strength and most of them collapsed during transportation.

Comparative Example 3 Sample 8 was obtained in the same manner as in Example 1 except that the ratio of Kanuma soil: sepiolite was changed to 30:70. Table 2 shows the packing density, particle strength, and deodorizing test results of Sample 8.

(Comparative Example 4) 3.3 w of commercially available iron
To 100 g of Kanuma soil for horticulture, an organic acid aqueous solution was added, followed by stirring, filtration and drying to obtain Kanuma soil reduced to 0.4% by weight of iron. The Kanuma soil from which iron was removed changed from brown, the color of the Kanuma soil before treatment, to light gray. A sample 9 was obtained in the same manner as in Example 1, except that the iron-treated Kanuma soil subjected to the acid treatment was used. Table 2 shows the results of the deodorizing test.

Example 6 Sample 1 obtained in Example 1
Bentonite granules obtained by treating cristobalite-containing acid clay with 0.2 kg to solid sodium carbonate
0.8 kg was added, and mixed to obtain a uniform sample 10. The swelling degree of the bentonite granules used was ACC method was 28.
ml / 2 g. The water absorption, solidification, and functional deodorization tests of this mixture were measured and are shown in Table 3. Table 2 shows the packing density and the results of the deodorizing test.

Example 7 0.35 kg of the sample 1 obtained in Example 1, 0.55 kg of bentonite granules used in Example 6, and aluminum-containing zinc phyllosilicate (Mizukanite, manufactured by Mizusawa Chemical Industry) 0.10 Kg was added and mixed so as to be uniform to obtain Sample 11. The water absorption, solidification, and functional deodorization tests of this mixture were measured and are shown in Table 3.

(Example 8) 0.45 kg of the sample 1 obtained in Example 1 and 0.55 kg of a commercially available bentonite granule were used.
Was added thereto and mixed to obtain a uniform sample 12. The water absorption, solidification, and functional deodorization tests of this mixture were measured and are shown in Table 3.

Example 9 0.45 kg of the sample 5 obtained in Example 5 and 0.55 kg of a commercially available bentonite granule were used.
Was added and mixed so as to obtain a uniform sample 13. The water absorption and solidification properties of this mixture were measured and are shown in Table 3.

(Example 10) Sample 4 obtained in Example 4
Was added to pondone-iodine (0.01 W%) bentonite granules (0.55 kg) and mixed uniformly to obtain Sample 14. The water absorption, solidification, and functional deodorization tests of this mixture were measured and are shown in Table 3.

(Comparative Example 5) 0.3 kg of the bentonite granules used in Example 6 was added to 0.7 kg of Sample 9 obtained in Comparative Example 4, and the mixture was mixed uniformly to obtain Sample 15.

Comparative Example 6 0.3 kg of the sample 9 obtained in Comparative Example 4 was put on a commercial silica gel pet toilet sand of 0.7 kg.
Sample 16 was obtained by adding Kg and mixing to make the mixture uniform. When the solidification property was measured, no solidification aggregation was observed.
The water absorption, solidification, and functional deodorization tests of this mixture were measured and are shown in Table 3. Table 2 shows the packing density, particle strength, and deodorization test results.

COMPARATIVE EXAMPLE 7 A commercially available natural zeolite pet toilet sand (0.7 kg) was added to 0.3 kg of the sample 9 obtained in the comparative example 4, and mixed uniformly to obtain a sample 17. When the solidification property was measured, no solidification aggregation was observed. The water absorption, solidification, and functional deodorization tests of this mixture were measured and are shown in Table 3.

(Comparative Example 8) A commercially available bentonite granulated pet litter was used as Sample 18, and the packing density, particle strength, and deodorizing test results of this sample are shown in Table 2, and the water absorption, solidification property,
The sensory deodorization test was measured and is shown in Table 3.

[0072]

[Table 2]

[0073]

[Table 3]

[0074]

By using the pet litter according to the present invention, it is possible to obtain a pet litter with reduced weight at low cost. Further, the obtained pet litter is excellent in water absorption and solidification properties, and is particularly remarkably improved in deodorizing performance as compared with conventional products.

Claims (5)

[Claims] 1. 0.5 on a dry basis (110 ° C., 2 hours)
50 to 95% by weight of an allophane-based clay mineral containing iron (Fe ₂ O ₃ ) in an amount of from 5.0 to 6.0% by weight, and at least one component 5 selected from the group consisting of a smectite group clay mineral and a formite group clay mineral A pet toilet sand comprising a granulated material having a composition of from 50 to 50% by weight. 2. The allophane-based clay mineral granule has a packing density of 250 to 600 g / L.
Pet toilet sand as described. 3. The pet toilet sand according to claim 1, wherein the allophane-based clay mineral has a specific surface area of 50 m ² / g or more. 4. The allophane-based clay mineral is SiO ₂ / Al
Pet litter according to any one of claims 1 to 3 and has a composition mole ratio of ₂ O ₃ is 1.0 to 4.5. 5. (A) 50 to 95% by weight of an allophane-based clay mineral containing 0.5 to 6.0% by weight of iron (Fe ₂ O ₃ ) on a dry basis, a smectite group clay mineral and a formite group clay A granulated product of a composition comprising 5 to 50% by weight of at least one component selected from the group consisting of minerals;
(B) A granulated product of a swellable clay mineral was prepared by (A) :( B) = 10
50 to 50:90 to 90 weight ratio blended pet litter.