Deodorizers and excrement treatment materials

Abstract

To provide a deodorizer having a remarkable deodorizing effect on pet odors, especially ammonia odors. [Solution] Okara powder, made by adjusting okara (soybean refuse), the residue of soybeans, to an average particle size of 50 μm or less, has a remarkable deodorizing effect on malodors such as ammonia odor and acetic acid odor, and can therefore be used as a deodorizer. Furthermore, by supporting the deodorizer made from this okara powder on the surface of an excrement treatment material or using it as the base material of the excrement treatment material, it is possible to provide an excrement treatment material that can effectively deodorize the excrement odor of cats and other animals without using adsorbents, masking agents, or antibacterial agents.

Description

[Technical Field]

[0001] The present invention relates to a deodorizer made from soybean pulp with enhanced deodorizing effect, and more specifically to a deodorizer made from soybean pulp powder in which soybean pulp, which is the residue of soybeans, is crushed and adjusted to a particle size of a predetermined size or less, thereby significantly improving the deodorizing effect against malodorous components such as ammonia, and to an excrement treatment material using the same. [Background technology]

[0002] In recent years, as fossil fuel resources are becoming depleted and global environmental problems become more serious, the use of biomass has been promoted worldwide with the aim of preventing global warming by reducing waste and carbon dioxide emissions and creating a recycling-oriented society.

[0003] Okara, which is generated during the tofu manufacturing process, is considered a low-calorie and nutritious food ingredient, and is reused for purposes such as food, animal feed, marine bait, and fertilizer in accordance with the Act on Promotion of Recycling, etc. of Food Recycling Resources (Food Recycling Act).

[0004] However, because okara is rich in nutrients, it is prone to spoilage, and because it has a high moisture content of 75-85 wt%, it is heavy and bulky, resulting in high transportation costs. Currently, although some okara is recycled, much of it is disposed of as waste, and research is underway into how to make effective use of okara.

[0005] Dried soybean pulp has excellent water absorption and is water-soluble, so it can be flushed down the toilet, and has therefore been used as a base material for excrement treatment materials such as cat litter. For example, Patent Document 1 discloses an animal excrement treatment material made by granulating or molding a mixture of soybean pulp and an adhesive resin to form granular soybean pulp, which is then dried.

[0006] However, the deodorizing effect of dried soy pulp is not necessarily sufficient for the malodor originating from animal excrement. The excrement of pet animals such as cats and dogs generates malodors such as ammonia odor and mercaptan odor. Conventionally, in order to deodorize the malodor of feces and urine absorbed by dried soy pulp, it has been necessary to use adsorbents, masking agents such as fragrances, antibacterial agents, etc. However, from the viewpoint of environmental impact, it is preferable to use as few chemicals as possible.

[0007] For these reasons, there has been a demand for soy pulp that has a significant deodorizing effect on ammonia odor, particularly cat excrement odor, without using adsorbents, masking agents, antibacterial agents, etc. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Patent No. 5694678 Summary of the Invention [Problem to be solved by the invention]

[0009] In view of the above-mentioned conventional drawbacks, the present invention is based on a novel concept and aims to provide soy pulp that has a significant deodorizing effect on pet odors, particularly ammonia odors, without using any adsorbents, masking agents, or antibacterial agents. [Means for solving the problem]

[0010] In view of the above object, the present inventors have conducted extensive research and discovered that soybean pulverized to a particle size of less than a predetermined size has a significant deodorizing effect, leading to the invention of the present invention.

[0011] The first invention is a deodorant comprising soy pulp powder having an average particle size of 50 μm or less.

[0012] A second aspect of the present invention is a deodorant characterized in that the moisture content of the soy pulp powder is 20 wt % or less.

[0013] The third invention of the present invention is a deodorant characterized in that the oil content of the soy pulp powder is 15 wt % or less as calculated based on bone dry weight.

[0014] A fourth aspect of the present invention is a deodorant, wherein the oil content of the soy pulp powder is 5.0 wt% or less as calculated based on bone dry weight.

[0015] The fifth aspect of the present invention is a method for producing the soybean pulp powder having a specific surface area of ​​0.7 m 2 / g or more.

[0016] The sixth invention of the present invention is an excrement treating material characterized in that a deodorizing agent made of soybean pulp powder having an average particle size of 50 μm or less is carried on the surface thereof.

[0017] The seventh invention of the present invention is a granular excrement treatment material containing a deodorizer made of soy pulp powder having an average particle size of 50 μm or less and a thermoplastic resin, wherein the content of the deodorizer is 50 wt% or more and 99 wt% or less, calculated as bone dry weight. [Effects of the Invention]

[0018] According to the first aspect of the present invention, by making the average particle size of the soy pulp powder 50 μm or less, it is possible to obtain a deodorizer that effectively eliminates malodors such as ammonia odor.

[0019] According to the second invention, by setting the moisture content of the soy pulp powder to 20 wt % or less, it is possible to prevent the deodorant from spoiling or becoming moldy.

[0020] According to the third invention, the oil content of the okara powder is set to 15 wt % or less, calculated as bone dry weight, thereby making it possible to further improve the deodorizing performance of the deodorant.

[0021] According to the fourth invention, the oil content of the okara powder is set to 5.0 wt % or less, calculated as bone dry weight, thereby making it possible to further improve the deodorizing performance of the deodorant.

[0022] According to the fifth aspect of the present invention, the specific surface area of ​​the okara powder is 0.7 m 2 / g or more, a deodorant that effectively eliminates malodors including ammonia odor can be obtained.

[0023] According to the sixth aspect of the present invention, by carrying a deodorizing agent made of soy pulp powder having an average particle size of 50 μm or less on the surface of the excrement treatment material, an excrement treatment material having a remarkable deodorizing effect on ammonia odor, particularly cat excrement odor, can be obtained.

[0024] According to the seventh invention, by incorporating 50 wt% or more of a deodorizing agent consisting of soy pulp powder having an average particle size of 50 μm or less as the base material of the excrement treatment material, an excrement treatment material having a remarkable deodorizing effect on ammonia odor, particularly cat excrement odor, can be obtained. [Brief explanation of the drawings]

[0025] [Figure 1] FIG. 1 is a stereomicroscope photograph (200x magnification) of dried okara, which is obtained by drying raw okara generated in the tofu manufacturing process. [Figure 2] FIG. 1 is a graph showing ammonia concentration changes in Examples 1 to 3 and Comparative Examples 1 and 2. [Figure 3] FIG. 1 is a graph showing the change in acetic acid concentration in Examples 1 to 3 and Comparative Examples 1 and 2. [Figure 4] FIG. 1 is a graph showing ammonia concentration changes in Examples 1, 4 and 5. DETAILED DESCRIPTION OF THE INVENTION

[0026] The deodorizer and excrement treatment material made from soybean pulp powder will be described in detail below. In this specification, "soybean pulp" is defined as soybean pulp obtained by squeezing soy milk from whole soybeans, as well as soybeans for processing such as defatted soybeans.

[0027] In this specification, "particle size" is defined as the particle size measured using dried soybean pulp. "Particle size" refers to the volume-average particle size measured by laser light scattering (laser diffraction), and "average particle size" refers to the median diameter D50.

[0028] In addition, the oil content (oil content) in this specification is defined as the value measured by the chloroform / methanol mixed liquid extraction method described in the Analysis Manual for the Standard Tables of Food Composition in Japan.

[0029] (1) Okara powder The deodorizer of the present invention is made of soy pulp powder having an average particle size of 50 μm or less. If the average particle size of the soy pulp powder exceeds 50 μm, the deodorizing performance will be insufficient, which is undesirable. The average particle size of the soy pulp powder is preferably 40 μm or less, more preferably 35 μm or less, and even more preferably 30 μm or less. On the other hand, if the average particle size is less than 20 μm, dust will fly and the deodorizer will become bulky, which is undesirable.

[0030] The specific surface area of ​​okara powder is 0.7m 2 / g or more, and 0.8m 2 / g or more. 2 If it is less than 1 / g, the deodorizing effect may not be sufficient, which is not preferable.

[0031] The soybean pulp powder prepared as described above effectively eliminates bad odors, including ammonia odor, and can be used as a deodorizer as is.

[0032] To prevent unpleasant odors due to mold or decay, the okara powder is preferably used in a dry state. The moisture content of the okara powder is preferably 20 wt% or less, more preferably 10 wt% or less, and more preferably 5.0 wt% or less.

[0033] (2) Manufacturing method of okara powder Okara obtained by extracting soy milk from whole soybeans usually has an average particle size of 300 μm or more, so it is crushed to produce okara powder with an average particle size of 50 μm or less. The method for producing okara powder is not particularly limited, and any known crushing method can be used, and either a dry method or a wet method can be used. As a preferred example, we will explain a method for preparing okara powder by drying raw okara until the moisture content is around 5 wt% to prepare dried okara, and then crushing the dried okara.

[0034] (Raw material: Okara) From the viewpoint of biomass reduction, it is preferable to use raw okara, which is generated in large quantities during the tofu production process, i.e., the residue remaining after soy milk is extracted from whole soybeans, as the raw material for okara powder. Raw okara consists of proteins, oils, carbohydrates, dietary fiber, ash, moisture, etc., and usually contains 75 to 85 wt% moisture.

[0035] The component composition of okara varies depending on the tofu manufacturer, but the dry content of normal okara is within the following ranges:

[0036] Protein: 20wt% to 25wt% Oil content: 10wt% or more and 18wt% or less Carbohydrates: 5wt% to 10wt% Dietary fiber: 43wt% to 55wt% Ash content 3wt% or more and 4wt% or less Water 1wt% or more and 8wt% or less

[0037] (Crushing process) Dried okara, which is obtained by drying raw okara, has variations in the size of okara particles as shown in Figure 1, so it is pulverized so that the median diameter D50 of the okara particles becomes 50 μm or less. To pulverize the okara, a known pulverizer such as a roll pulverizer, a collision pulverizer, or a ball mill pulverizer can be used.

[0038] The oil content of dried okara after crushing tends to be higher than before crushing. This is because the crushing process exposes new edge surfaces of the okara particles, increasing the amount of oil eluted by the chloroform-methanol mixed liquid extraction method. After crushing, the oil content is usually 1 to 4 wt% higher than before crushing.

[0039] If the oil content of the okara bleeds out during the grinding process, the okara powder will not be able to exhibit a sufficient deodorizing effect, so the oil content of the okara powder, calculated based on bone dry weight, is preferably 15 wt% or less, more preferably 13 wt% or less, and even more preferably 12 wt% or less.

[0040] In one embodiment, in order to reduce the oil content of the okara powder to 15 wt% or less, a degreasing treatment such as a washing treatment or a chemical treatment can be performed within the scope of the present invention. The degreasing treatment of the okara may be performed before or after the grinding treatment. When a degreasing treatment is performed, the oil content of the okara powder is preferably 5.0 wt% or less, more preferably 3.0 wt% or less, even more preferably 2.0 wt% or less, and particularly preferably 1.0 wt% or less, calculated based on bone dry weight.

[0041] (3) Excrement treatment materials The deodorizer comprising the soybean pulp powder of the present invention can effectively deodorize malodors including ammonia odor, and therefore, by supporting the soybean pulp powder on the surface of an excrement treatment material or by using the soybean pulp powder as a base material for the excrement treatment material, an excrement treatment material with a high deodorizing effect can be provided.

[0042] (Excrement treatment material carrying soybean pulp powder) When the deodorizer made of the okara powder of the present invention is supported on the surface of an excrement treatment material, the okara powder is mixed with the excrement treatment material to adhere the okara powder to the surface of the excrement treatment material. The excrement treatment material may be made of okara, paper, mineral, wood, silica gel, or other materials, and any known excrement treatment material can be used. The average particle size of the okara powder supported on the surface of the excrement treatment material is preferably 40 μm or less, more preferably 30 μm or less. When the okara powder is supported on the surface of the excrement treatment material, it is preferable to support 3 parts by weight or more, and preferably 5 parts by weight or more, of the deodorizer made of okara powder per 100 parts by weight of the excrement treatment material.

[0043] (Excrement treatment material containing soybean pulp powder) When the deodorizer made from the soy pulp powder of the present invention is used as a base material for an excrement treatment material, a granulation mixture prepared to a moisture content required for granulation by mixing a thermoplastic resin with the base material containing the deodorizer made from soy pulp powder, and the excrement treatment material can be produced by granulating this granulation mixture using a granulation device.

[0044] The deodorizer made from okara powder is preferably blended in a ratio of 50 wt% to 99 wt% in the base material, calculated as bone dry weight. A content of the deodorizer made from okara powder less than 50 wt% is undesirable because the deodorizing effect may be insufficient. Preferably, the deodorizer made from okara powder accounts for 90 wt% or more of the base material, more preferably 95 wt% to 99 wt%. A base material containing a deodorizer made from okara powder may be blended with other plant fiber materials besides okara. Examples of plant fiber materials other than okara include pulp, wood flour, cellulose-based fibers, cotton, and waste materials thereof.

[0045] The excrement treatment material preferably has the property of becoming wet after use, allowing particles of the excrement treatment material to adhere to each other through adhesion and form clumps. To promote adhesion of the excrement treatment material particles to each other, it is preferable to use a water-absorbent resin with adhesive properties as the thermoplastic resin used in the granulation mixture. Examples of such water-absorbent resins with adhesive properties include saponified copolymers of vinyl esters and ethylenically unsaturated carboxylic acids or their derivatives, graft polymers of starch and acrylic acid, crosslinked polyacrylic acid, copolymers of vinyl alcohol and acrylic acid, partial hydrolysates of polyacrylonitrile, crosslinked carboxymethylcellulose, chitosan salts, pullulan gels, etc.

[0046] In the granulation mixture, the amount of thermoplastic resin is preferably 5.0 wt% or less, more preferably 3.0 wt% or less, and even more preferably 1.0 wt% or less. If the amount of thermoplastic resin exceeds 5.0 wt%, the shape stability of the granulated particles may be impaired when absorbing water, which is undesirable.

[0047] In one embodiment, the excrement treatment material of the present invention may contain additional components such as a bactericide in addition to the substrate and thermoplastic resin. Typical bactericidal components used in excrement treatment materials include table salt, sorbic acid or its salts, calcium propionate, sodium hypochlorite, benzoic acid or its salts, or a mixture of two or more thereof.

[0048] In one embodiment, the excrement treatment material of the present invention does not use any other deodorizer than the deodorizer comprising the soy pulp refuse powder of the present invention. Common deodorizers used in excrement treatment materials include pulp re-burning incineration ash, vermiculite, perlite, activated carbon, silica gel, wood vinegar, bamboo vinegar, roasted coffee bean extraction residue or used tea leaves, zeolite, bentonite, catechins, chalcones, flavanones, flavones, flavonols, flavanonols, flavanols, isoflavones or anthocyanins, hiba cypress oil, hinokitiol, hinokitiol-containing wood flour from hiba cypress and other sources, and ordinary soy pulp refuse that has not been particle size adjusted.

[0049] The lower the moisture content of the excrement treating material of the present invention, the more effectively it can suppress the growth of mold. The moisture content of the excrement treating material is preferably 12 wt% or less, more preferably 10 wt% or less, and even more preferably 8 wt% or less. [Example]

[0050] The present invention will be described in more detail by the following examples, but the present invention is not limited to these examples.

[0051] Example 1 (Okra powder) Raw okara produced in a tofu factory was dried at 105°C for 12 hours to a moisture content of 3.7%. Analysis of the dried raw okara revealed that it contained 12.2 wt% oil, 21.5 wt% protein, 9.7 wt% carbohydrates, 49.3 wt% dietary fiber, and 3.6 wt% ash.

[0052] This dried raw okara was pulverized using a pulverizer and used as the okara powder of Example 1. The average particle size of the okara powder of Example 1 was measured using a laser diffraction / scattering particle size distribution analyzer (manufactured by Horiba, Ltd., device name: LA-960) and found to be 47.8 μm. The oil content of the okara powder of Example 1 was 13.2 wt%.

[0053] Example 2 (Okra powder) The soybean refuse powder with an average particle size of 47.8 μm prepared in Example 1 was sieved several times through sieves with a mesh size of 100 to 500 to prepare soybean refuse powder with an average particle size of 32.0 μm. When the soybean refuse powder of Example 2 was analyzed for its components, the oil content was found to be 14.3 wt%.

[0054] Example 3 The dried raw soybean pulp prepared in Example 1 was pulverized to an average particle size of 42.0 μm to prepare soybean pulp powder as Example 3. The oil content of the soybean pulp powder in Example 3 was 13.5 wt %.

[0055] [Ammonia deodorization test] Next, an ammonia deodorization test was conducted using the gas detection tube method for the okara powders of Examples 1 to 3. For comparison, dried raw okara from Example 1 (oil content 12.2 wt%, average particle size 426 μm) was used as Comparative Example 1. Furthermore, raw okara produced in a different tofu factory from Example 1 and dried to a moisture content of 4.0% (oil content 15.8 wt%, average particle size 510 μm) was used as Comparative Example 2.

[0056] 1.0 g of the test sample (okara powder) was placed in a 500 ml gas collection bottle, and ammonia gas was introduced to an initial concentration of 400 ppm. The ammonia concentration was measured using a gas detector tube (Gastec, model numbers 3M and 3La). For comparison, an empty gas collection bottle was also prepared with ammonia gas introduced in the same manner (hereinafter referred to as the blank).

[0057] The ammonia concentration in the gas collection bottle was measured a predetermined time after the introduction of ammonia gas, and the results are shown in Table 1. The changes in ammonia concentration in Examples 1 to 3 and Comparative Examples 1 and 2 are shown in FIG.

[0058] [Table 1]

[0059] The ammonia concentration rapidly decreased and reached 50 ppm or less after 30 minutes in the soy pulverized okara powders of Examples 1 to 3. On the other hand, the unpulverized soy pulverized okara of Comparative Examples 1 and 2 had the effect of decreasing the ammonia concentration, but even after 30 minutes the ammonia concentration remained at 90 to 100 ppm, indicating that the ammonia deodorizing effect was insufficient.

[0060] [Acetic acid deodorization test] Next, the okara powders of Examples 1 to 3 and the okara powders of Comparative Examples 1 and 2 were subjected to an acetic acid deodorization test using a gas detector tube method.

[0061] 1.0 g of the test sample (okara powder) was placed in a 500 ml gas collection bottle, and acetic acid gas was introduced so that the initial concentration was 50 ppm. The acetic acid concentration was measured using a gas detector tube (Gastec, model number: 81). For comparison, an empty gas collection bottle was also prepared in which acetic acid gas was introduced in the same manner (hereinafter referred to as the blank).

[0062] The acetic acid concentration in the gas collection bottle was measured a predetermined time after the introduction of acetic acid gas, and the results are shown in Table 2. The changes in acetic acid concentration in Examples 1 to 3 and Comparative Examples 1 and 2 are shown in Figure 3. These results show that Examples 1 to 3, in which the average particle size was adjusted to 50 μm or less, had improved acetic acid deodorizing performance compared to Comparative Examples 1 and 2.

[0063] [Table 2]

[0064] Example 4 (Degreasing treatment) 3 kg of the okara powder of Example 1 with an oil content of 13.2 wt% was stirred in 30 L of methanol at 60°C for 1 hour. The resulting okara suspension was subjected to suction filtration to elute and separate the oil contained in the okara. The methanol was replaced, and the same degreasing treatment was repeated twice.

[0065] The obtained soy pulp powder was dried at 105°C for 12 hours and adjusted to a moisture content of 4.0 wt%, which was used as Example 4. The oil content of Example 4 was 2.6 wt%.

[0066] Example 5 (Degreasing treatment) 3 g of the okara powder from Example 1, with an oil content of 13.2 wt%, was placed in 60 ml of a chloroform-methanol mixture (chloroform:methanol = 2:1) with a condenser attached and stirred at 60°C for 1 hour. The okara suspension was subjected to suction filtration to elute and separate the oil contained in the okara. The chloroform-methanol mixture was replaced, and the same degreasing process was repeated twice.

[0067] The obtained okara powder was dried at 105°C for 12 hours and adjusted to a moisture content of 4.0 wt%, which was used as Example 5. The oil content of Example 5 was 0.0 wt% (below the detection limit).

[0068] [Ammonia deodorization test] Next, the defatted soy pulp powders of Examples 1, 4, and 5 were subjected to an ammonia deodorization test using the same procedure as the gas detector tube method described above, and the results are shown in Table 3. The ammonia concentration changes in Examples 1, 4, and 5 are shown in Figure 4.

[0069] [Table 3]

[0070] The results in Table 3 show that the lower the oil content of the okara powder, the greater the deodorizing effect, and that degreasing treatment improves the ammonia deodorizing effect.

[0071] [Measurement of specific surface area of ​​okara] The specific surface area of ​​the okara was measured by evacuating it to a vacuum at 40°C for 24 hours, and then calculating it at liquid nitrogen temperature using the BET three-point method from the amount of krypton adsorbed at pressures of 0.1, 0.2, and 0.3. The krypton-occupied area was 0.205 nm 2 Table 4 shows the specific surface area of ​​each type of soy pulp. In Table 4, the ammonia deodorizing effect was judged to be "good" when the ammonia concentration after 30 minutes in the ammonia deodorizing test was 50 ppm or less, and the acetic acid deodorizing effect was judged to be "good" when the acetic acid concentration after 10 minutes in the acetic acid deodorizing test was 5 ppm or less.

[0072] [Table 4]

[0073] Comparing the specific surface areas of Examples 1 and 5, it can be seen that removing the oil from the okara to the detection limit easily increases the specific surface area by more than two times. The results in Table 4 suggest that the specific surface area of ​​the okara increases with degreasing treatment, and that the larger the specific surface area, the greater the deodorizing effect.

[0074] In the case of activated carbon and coffee beans, which are standard deodorizers, the biomass is given a high deodorizing effect through a burning process, but in the case of soy pulp, the deodorizing effect can be improved by degreasing the biomass.

[0075] Example 6 (Production of animal waste treatment materials) 70 parts by weight of the soy pulp powder of Example 1, 3 parts by weight of an adhesive water-absorbent resin, Hymosub HS-1100 (manufactured by Hymo Co., Ltd.), and 27 parts by weight of water were charged into a ball mill to prepare a kneaded mixture for granulation. The kneaded mixture for granulation was fed into an extrusion-type granulator to granulate particles with a diameter of 4 mm and a length of 10 mm. These particles were dried with hot air at a temperature of 80°C or higher until the moisture content reached 10 wt%, to prepare an animal excrement treatment material.

[0076] The obtained animal excrement treatment material was laid to a depth of 7 cm in a commercially available cat litter box and used for cat excretion. The material had good water absorption and deodorizing properties, and the smell of urine was hardly noticeable in the room.

[0077] Example 7 (Production of animal waste treatment materials) An animal excrement treatment material was produced in the same manner as in Example 6, except that 50 parts by weight of the soybean pulverized powder of Example 1, 20 parts by weight of paper powder pulverized to a particle size of 0.3 mm or less using a fine grinder, 3 parts by weight of an adhesive water-absorbent resin, Hymosub HS-1100 (manufactured by Hymo Co., Ltd.), and 27 parts by weight of water were charged into a grinder to prepare a granulation mixture.

[0078] The obtained animal excrement treatment material was laid to a depth of 7 cm in a commercially available cat litter box and used for cat excretion. The material had good water absorption and deodorizing properties, and the smell of urine was hardly noticeable in the room.

[0079] Example 8 (Production of animal waste treatment materials) An animal excrement treatment material was prepared in the same manner as in Example 6, except that the soy pulp from Comparative Example 1 was used instead of the soy pulp powder from Example 1. Furthermore, when the animal excrement treatment material was used on cat excrement in the same manner as in Example 6, the water absorbency was good, but the smell of cat urine could still be detected in the room even after 1 hour had passed.

[0080] 1 kg of this animal excrement treatment material was mixed and stirred with 100 g of the okara powder from Example 2 to prepare an animal excrement treatment material with okara powder supported on its surface, which was designated as the animal excrement treatment material of Example 8. When the animal excrement treatment material of Example 8 was used for cat excrement in the same manner as in Example 6, no cat urine odor was detected indoors. This demonstrates that the deodorizing effect of the animal excrement treatment material is improved by supporting a deodorizer made of the okara powder of the present invention on its surface. [Industrial Applicability]

[0081] As explained above, okara powder, which is made by adjusting okara, the residue of soybeans, to an average particle size of 50 μm or less, has the effect of eliminating malodors such as ammonia odor and acetic acid odor, and can be used as a deodorizer in a variety of situations. For example, okara powder can be used as a room deodorizer as is, or by adding okara powder to resin or the like, it can be used as a material for food storage bags or building wallpaper.

[0082] Furthermore, excrement treatment materials using a deodorizer made from soybean pulp powder can effectively eliminate urine odors, particularly the odors of excrement from cats and the like, without using adsorbents, masking agents, or antibacterial agents.

Claims

1. A deodorizer characterized by comprising soybean pulp powder having an average particle size of 50 μm or less.

2. 2. The deodorant according to claim 1, wherein the moisture content of the soy pulp powder is 20 wt % or less.

3. 2. The deodorant according to claim 1, wherein the oil content of the soy pulp powder is 15 wt % or less as calculated based on bone dry weight.

4. 2. The deodorant according to claim 1, wherein the oil content of the soy pulp powder is 5.0 wt % or less as calculated based on bone dry weight.

5. The specific surface area of ​​the soybean pulp powder is 0.7 m ２ 2. The deodorant according to claim 1, wherein the molecular weight of the deodorant is 1 / g or more.

6. The excrement treatment material is characterized in that a deodorizing agent made of soybean pulp powder having an average particle size of 50 μm or less is carried on the surface thereof.

7. A deodorizer made of soybean pulp powder having an average particle size of 50 μm or less and a granular excrement treatment material containing a thermoplastic resin, The excrement treating material is characterized in that the content of the deodorant is 50 wt % or more and 99 wt % or less, calculated as an absolute dry weight.

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