JPH1177025A - Water purification agent and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a water purification agent by which purified water qualified for drinking can be manufactured efficiently and hygienically in a short time. SOLUTION: Silicon dioxide of 35 to 77 wt.%, 14 to 20 wt.% of aluminum oxide, 5-24 wt.% of iron (III) oxide, 1 to 10 wt.% of calcium oxide, 1 to 4 wt.% of magnesium oxide, 0.05 to 1 wt.% of manganese oxide, 1 to 3 wt.% of sodium oxide, and 0.95 to 3 wt.% of potassium oxide are contained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purifying agent capable of producing water suitable for drinking efficiently and hygienically in a very short time, and a method for producing the same.

[0002]

2. Description of the Related Art With a change in living environment, eutrophication of lakes, marshes, and rivers has progressed, and the resulting deterioration in water quality has had various effects on our lives. In eutrophic lakes and marshes, especially in the summer season, the occurrence of flora and fauna plankton such as red tide and blue-green algae gives off a bad smell in the surroundings.
The amount of chlorine added for disinfection increases, resulting in a strong smell of chlorine. It is also said that an organic compound contained in water reacts with excessively charged chlorine to produce trihalomethane suspected of being carcinogenic. In addition, the pollution of groundwater has become serious, and there is a growing interest in the adverse effects on health due to contamination with pesticides, trichlorethylene, and pathogenic E. coli. Therefore, in recent years, various water purification agents for removing harmful substances and the like have been studied. For example, Japanese Patent Publication No. 54-4218
No. 0 (hereinafter referred to as “A”) discloses a water purification agent in which activated carbon and a silver salt which is hardly soluble in water are combined.
JP-A-7-330460 (hereinafter referred to as "B") discloses acid clay, aluminum oxide, kibushi clay, kaolin so that the ratio of silicon dioxide to aluminum oxide is 5.65 to 5.98. And zeolite are mixed and sintered, and the particle size is adjusted to 0.5 to 1.8 mm.

[0003]

However, the above-mentioned conventional water purifier has the following problems. JP-A No. (1) uses an expensive silver salt for sterilization and has a problem of lack of economy. (2) There is a problem that the portion that has come into contact with the silver salt is sterilized, but the non-contact portion is not sterilized, and lacks safety. In the gazette of (2), there is a problem that since the ratio of silicon dioxide to aluminum oxide is 5.65 to 5.98, the amount of calcium and magnesium ions eluted is small, and the effect as mineral water is lacking. (4) It is molded to a particle size of 0.5 to 1.8 mm. Since the particle size is small, it is accompanied by water, so that a separate filtration container or filtration tube is required. There is a problem of lack.

[0004] The present invention solves the above-mentioned problems in the prior art. It has a high solubility of calcium ions and magnesium ions, can produce purified water rich in minerals in a short time, and uses expensive silver salts. Provided is a water purification agent that can perform sterilization without performing filtration and does not need to form a filtration device or a filter tube, and a manufacturing method that can obtain an inexpensive and high-quality water purification agent without requiring a complicated manufacturing process. The purpose is to:

[0005]

In order to achieve this object, the water purifier of the present invention comprises 35 to 77% by weight of silicon dioxide, 14 to 20% by weight of aluminum oxide, 5 to 24% by weight.
Wt% ferric oxide, 1-10 wt% calcium oxide, 1-4 wt% magnesium oxide, 0.05-
It has a configuration containing 1% by weight of manganese oxide, 1 to 3% by weight of sodium oxide, and 0.95 to 3% by weight of potassium oxide. With this configuration, it is possible to manufacture drinking water that is rich in mineral components such as calcium ions and magnesium ions in a short time. Further, the method for producing a water purification agent of the present invention, the mixture of powdered raw ore,
There is a baking step in which a chitin / chitosan fermentation solution is added, granulated, and baking. According to this configuration, an inexpensive and high-quality water purification agent can be manufactured without requiring a complicated manufacturing process.

[0006]

DETAILED DESCRIPTION OF THE INVENTION The water purifying agent according to claim 1 of the present invention comprises 35 to 77% by weight of silicon dioxide, 14 to 20% by weight of aluminum oxide, and 5 to 24% by weight of ferric oxide. 1 to 10% by weight calcium oxide, 1 to 4% by weight magnesium oxide, 0.05 to 1% by weight manganese oxide, 1 to 3% by weight sodium oxide, 0.95%
-3% by weight of potassium oxide. Thereby, calcium ions and magnesium ions are eluted into the raw water, and purified water containing minerals suitable for drinking can be produced. At the same time, manganese oxide contained in trace amounts prevents the growth of microorganisms in the raw water. Having. Here, silicon dioxide is 35% by weight.
The pH of the purified water becomes 8.6, which is the upper limit suitable for drinking, as the amount becomes smaller or the aluminum oxide becomes more than 20% by weight.
And silicon dioxide is 77% by weight.
It is not preferable because the elution of calcium ions and magnesium ions tends to decrease as the amount increases or the amount of aluminum oxide decreases below 14% by weight. As calcium oxide and magnesium oxide become less than 1% by weight, respectively, it becomes difficult to elute into purified water, so that there is a tendency that the mineral content cannot be enhanced.
As more than 0% by weight, excess eluted
H is also undesirably increased because it tends to be unsuitable for drinking. Manganese oxide tends to show no sufficient bactericidal effect as it becomes less than 0.05% by weight,
If the amount exceeds 0.5% by weight, it tends to exceed the allowable range in the purified water, which is not preferable. Ferric oxide is not preferred because the water purifying agent tends to become brittle as the amount of ferric oxide is less than 5% by weight, and tends to elute into purified water as the amount of ferric oxide exceeds 24% by weight. As the amount of sodium oxide becomes less than 1% by weight or the amount of potassium oxide becomes less than 0.95% by weight, the alkali content in the purified water tends to be insufficient. Are not preferred because they tend to be too strong.

[0007] The water purifying agent according to claim 2 of the present invention is characterized in that in claim 1, corundum-containing ore, mordenite,
The water purification agent according to claim 1, comprising silica and silica as a main raw material. As a result, a composition having a predetermined composition ratio can be produced, and corundum, which is crystalline and has a low ion exchange capacity and a low toxic substance adsorption capacity, is mixed with mordenite and silica to form an amorphous material. This has the effect that the adsorption capacity and the ion exchange capacity can be improved.

[0008] The water purifying agent according to claim 3 of the present invention is formed into a substantially spherical shape having a diameter of 3 to 20 mm according to claim 1 or 2, and a sintering temperature of 600 to 1300 ° C, preferably 900 ° C.
It has a configuration fired at ~ 1200 ° C. This has the effect that purified water can be produced simply by charging a water purification agent into a container having a simple structure such as a PET bottle and pouring raw water such as well water or tap water. Here, the target purified water can be produced in a short time only by shaking the container several times at room temperature, but if the container is put into a refrigerator and cooled, the raw water circulates by convection, so that there is no need to shake. If a simple structure such as a net is provided at the mouth of the container as needed, it is possible to prevent the water purification agent from being mixed when the purified water is poured into a cup or the like. As the diameter of the water purifier becomes smaller than 3 mm, the structure such as a net for preventing outflow tends to be complicated, and as the diameter becomes larger than 20 mm, the specific surface area becomes smaller, so that the ion exchange capacity and the adsorption capacity become larger. Is not preferred because it tends to decrease. The firing temperature is 900 ° C
As the value becomes lower, the phase transition of the corundum to the amorphous one becomes more difficult, so that the water purification action tends to decrease.
As the temperature becomes higher than 00 ° C., the raw materials tend to melt and become glassy, which is not preferable. 600 ° C
As the temperature becomes lower or becomes higher than 1300 ° C., the above tendency becomes remarkable. When the sodium ions and potassium ions are excessively eluted and the pH becomes higher than 8.6, which is an upper limit suitable for drinking, after primary baking, it is immersed in a calcium ion-containing liquid such as calcium chloride. After re-firing after air-drying.

According to a fourth aspect of the present invention, there is provided a pulverizing step of pulverizing a raw material ore, and a compounding step of mixing the pulverized raw ore so as to have the component ratio described in the first aspect. A kneading step of adding a chitin / chitosan fermentation solution to the mixture and kneading the mixture, a granulation step of granulating the kneaded mixture into a substantially spherical form, a drying step of drying the granulated product, and a drying step. And a firing step of firing. Thus, by adding and kneading the viscous chitin-chitosan fermentation liquid, it is possible to granulate the raw material powder containing the low-viscosity corundum-containing ore to a desired particle size. Further, since a large number of micropores are generated in the water purification agent by baking, the water purification agent has an effect that mineral components such as calcium ions and magnesium ions can be very efficiently eluted into raw water. Here, the average particle size in the pulverizing step is 50 to 500 μm, preferably 100 to 300 μm.
And sieved as necessary. When the average particle size is smaller than 100 μm, handling tends to be difficult, and when the average particle size is larger than 300 μm, the surface area becomes smaller, so that the ion exchange capacity and the adsorption capacity tend to decrease. Also, 50 μm
This tendency becomes more remarkable as the diameter becomes smaller or becomes larger than 500 μm, which is not preferable. The chitin / chitosan fermentation solution is obtained by fermenting a chitin / chitosan mixture using an antioxidant thermophilic bacterium at a temperature of about 70 to 95 ° C. This fermentation turns the powdered chitin / chitosan into a viscous liquid, which has the effect of kneading a raw material containing a low-viscosity corundum-containing ore to facilitate granulation. In the drying step, the granulated product is air-dried until there is no change in weight, or the drying process is performed using a constant-temperature air dryer. Here, if the temperature is rapidly increased, the granulated product tends to crack or break, which is not preferable.

Hereinafter, specific examples of the embodiments of the present invention will be described with reference to the drawings. (Embodiment) FIG. 1 is a flow chart showing a method for producing a water purification agent according to an embodiment of the present invention. In FIG. 1, 1 is a pulverizing step of pulverizing a raw ore, 2 is a mixing step of mixing a raw ore pulverized so as to have a predetermined component ratio, and 3 is a mixing and kneading by adding a chitin / chitosan fermentation liquid to the mixed raw material. 4 is a granulation step of granulating the kneaded product to a substantially particle size, 5 is a drying process of drying the granulated product, and 6 is a firing process of firing the dried product. Hereinafter, the method for producing the water purification agent of the present invention will be described with reference to FIG. First, as a pulverizing step, a raw ore is pulverized using a ball mill or the like. If necessary, sieving is performed so that the particles have a predetermined particle size. Next, in the blending step 2, the powder obtained as described above is blended so that each component has a predetermined blending amount. Next, a chitin / chitosan fermentation liquid is added to the raw material powder blended in the kneading step 3 and kneaded to form a slurry. Next, what was kneaded as a granulation step was to have a diameter of
Granulate so as to have a substantially spherical shape of about 0 mm. Next, as a drying step 5, drying is performed by natural drying or a constant-temperature air dryer until there is no change in weight. The dried product is fired at a temperature of 600 to 1300 ° C.
By baking at 00 to 1200 ° C., a water purification agent is produced.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described in detail. (Experimental Example 1) In the pulverizing step 1, corundum-containing ore, mordenite, and silica were pulverized into fine particles having an average particle diameter of 200 µm. These were blended in a prescribed amount in the blending step 2 to obtain two types of blends A and B. In a kneading step 3, a chitin-chitosan culture solution was added and kneaded, and in a granulating step 4, the mixture was granulated into a sphere having a diameter of about 7 mm. Further, as a drying step 5, the mixture was allowed to stand at room temperature for 2 days and air-dried. Then, as a baking step 6, baking was performed at 1100 ° C. for 2 hours to obtain a water purification agent. The components of A and B were analyzed, and the results are shown in (Table 1).

[Table 1] 100 g of A and B each is 1.8 liters of well water (C
a ²⁺ concentration 10.0 mg / l, Mg ²⁺ concentration 2.7 mg /
1, pH = 7.1) and stored in a refrigerator at 5 ° C. for 24 hours, and each of hydrogen ion concentration (pH), calcium ion concentration and magnesium ion concentration was measured. As can be seen from this (Table 1), both A and B eluted a large amount of calcium ions and magnesium ions, indicating that they are suitable for drinking. In addition, Escherichia coli was not detected, and it was confirmed that the effect of preventing the growth of microorganisms was high. Here, since the pH of the composition B increased to 8.7, it was immersed in a 5% calcium chloride solution for 30 minutes, dried, and dried.
The same measurement was performed after re-firing at 100 ° C. As a result, the elution amounts of calcium ions and magnesium ions were almost the same as before calcium chloride immersion, and the pH was 7.
It turned out that it can be suppressed to 5. Further, it was confirmed that the water purifying action of each of the water purifying agents A and B did not deteriorate over 50 times, and the water purifying ability was extremely high.

[0012]

According to the water purifying agent according to the first aspect of the present invention, a. Calcium ions and magnesium ions are eluted into the raw water to produce purified water containing minerals that are optimal for drinking. b. The manganese oxide contained in a trace amount can prevent the growth of microorganisms in the raw water.

According to the water purifying agent of the second aspect, in addition to the effect of the first aspect, c. A water purifier having a predetermined composition ratio can be produced, and since the crystalline corundum changes into an amorphous one, the ability to adsorb harmful substances and the ability to exchange ions can be improved.

According to the water purifying agent of the third aspect, since it is fired after being molded into a substantially spherical shape having a diameter of 3 to 20 mm in the first or second aspect, e. Water purification can be produced simply by putting a water purification agent into a container such as a PET bottle and pouring raw water without requiring a special filtering device or the like.

According to the method for producing a water purifying agent according to claim 4, a fermented solution of chitin / chitosan is added, kneaded and granulated, and then fired. F. A raw material powder containing a low-viscosity corundum-containing ore can be granulated to a target particle size.

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[Procedure amendment]

[Submission date] February 26, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Added

[Correction contents]

[Brief description of the drawings]

FIG. 1 is a flowchart showing a method for producing a water purification agent according to an embodiment of the present invention.

[Explanation of symbols] 1 crushing step 2 compounding step 3 kneading step 4 granulating step 5 drying step 6 firing step

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI C02F 1/50 520 C02F 1/50 520B 531 531H 531C 531J 540 540D

Claims (4)

[Claims] 1. A method according to claim 1, wherein 35 to 77% by weight of silicon dioxide and 1
4 to 20% by weight of aluminum oxide and 5 to 24% by weight
Ferric oxide and 1 to 10% by weight of calcium oxide,
It contains 1 to 4% by weight of magnesium oxide, 0.05 to 1% by weight of manganese oxide, 1 to 3% by weight of sodium oxide, and 0.95 to 3% by weight of potassium oxide. Water purifier 2. The water purification agent according to claim 1, wherein the water purification agent contains corundum-containing ore, mordenite, and silica as main raw materials. 3. A substantially spherical shape having a diameter of 3 to 20 mm, and a firing temperature of 600 to 1300 ° C., preferably 900 to 1300 ° C.
3. The composition of claim 1, wherein the composition is fired at 200.degree.
The water purifier according to the above. 4. A pulverizing step of pulverizing the raw ore, a mixing step of mixing the pulverized raw ore so as to have the component ratio according to claim 1, and adding a chitin / chitosan fermentation liquid to the compounded one. A kneading step of mixing and kneading, a granulating step of granulating the kneaded material into a substantially spherical shape, a drying step of drying the granulated matter, and a firing step of firing the dried matter,
A method for producing a water purification agent, comprising: