JPH11138179A - Gradually dissolving water treating agent and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the production method of a gradually dissolving water treating agent capable of being dissolved in water in a suitable amount and whose stability is not damaged over a long period of time and to remarkably reduce its production cost. SOLUTION: A production process of the gradually dissolving water treating agent comprises a preparing stage 1 of a treating chemical agent, a dissolving stage 2 of the treating chemical agent, the preparing stage 3 of gypsum, a mixing stage 4 of the treating chemical agent and the gypsum and a hydration solidifying stage 5. The gradually dissolving water treating agent is formed from the hydrated solid matter of the water, containing the treating chemical agent consisting of one or >=2 kinds among ascorbic acid, citric acid, lactic acid, succinic acid, oleic acid, tartaric acid and salts of these acids, and the gypsum.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a slowly soluble water treatment agent and a method for producing the same, which dissolves in water at an appropriate speed, provides a stable treatment effect for a long period of time, and is inexpensive. The present invention relates to a slowly dissolving water treatment agent which can be produced at a low temperature and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, various chemicals have been used for water reforming treatment and treatment for suppressing the growth of various bacteria. However, since these drugs have high solubility in water due to their properties,
Even if it is processed and formed into a granular material or the like, there is a problem that it is dissolved in water in a short time and the concentration of the drug in the water becomes too high, and the consumption of the drug becomes too large.

In order to solve the above-mentioned problems, various so-called gradually soluble water treatment agents have recently been developed. For example, sintered particles or ceramic particles containing an effective mineral component are used for water reforming treatment, and K ₂ particles are used for antibacterial treatment.
Dissolvable glass particles and soluble ceramic particles containing O, Na ₂ O, CaO, etc., and ceramic particles containing silver, copper, etc. Glass bodies and porous ceramic bodies are widely used.

However, those formed into sintered particles or ceramic particles have relatively low solubility in water, and it is difficult to raise the drug concentration in water to a predetermined value.
There is a problem that it is difficult to apply to a water purifier provided in a flowing water channel. In addition, since there is little dissolution of the drug in water, contaminants in the water are likely to adhere to the surfaces of the ceramic granules and sintered granules, and the purifying effects such as water reforming and sterilization are reduced. become. Furthermore, there is a problem that the molding process of the sintered particles and the ceramic particles is troublesome, and it is difficult to reduce the production cost of the treating agent.

[0005] Instead of sintered particles or ceramic particles,
Development of a method for forming a solid containing K ₂ O, Na ₂ O, or the like using lime, cement, a synthetic resin adhesive, starch paste, or the like has been advanced. However, there is a problem that lime, cement, and the like may react with the treatment agent, and the treatment agent lacks safety.

On the other hand, calcium sulfite or activated carbon has been used as a residual chlorine remover in water used in water purifiers and the like. For example, in buildings and the like, it is common practice to remove residual chlorine using a treatment agent such as calcium sulfite or activated carbon in a water storage tank or a water supply path from the water storage tank. However, if the management of the treatment agent is not sufficient, there is a problem that various bacteria grow due to clogging of the treatment agent and the like, and the quality of water itself deteriorates under high temperature conditions such as in summer. In addition, since it is necessary to frequently change the treatment agent, it takes time and effort to perform maintenance, and if the concentration of unreacted calcium sulfite or the like increases, it may cause health problems for people using water. Become.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems in the conventional slowly soluble water treatment agent and the treatment agent for removing residual chlorine, namely, (a) the treatment agent is hardly dissolved in water, It is difficult to maintain the drug concentration at a predetermined value, (b) it is easy for contaminants to adhere to the outer surface of the treatment agent, and the treatment action is easily reduced. It is difficult to reduce costs, (d) it is difficult to efficiently remove residual chlorine in water, and there is a risk that water remover may impair the safety of water. (E) binders such as lime and starch paste In such a case, it is intended to solve the problem that the treatment chemical reacts with the binder and easily deteriorates, and the dissolution amount of the treatment chemical can be easily set to a desired value. Has no adverse effects on the human body and can be manufactured at low cost And it provides a gradually soluble water treatment agent as.

[0008]

The invention described in claim 1 of the present application comprises one or more of ascorbic acid, citric acid, lactic acid, succinic acid, oleic acid, tartaric acid and salts of the above-mentioned acids. It is a basic feature of the present invention that a treatment agent is contained in a hydrated solid gypsum.

[0009] The invention of claim 2 is the invention of claim 1, wherein the content of gypsum in the hydrated solid is 20 wt% or more.

[0010] The invention of claim 3 is claim 1 or claim 2.
In the invention, the treatment agent is a treatment agent for dechlorination comprising one or both of ascorbic acid and ascorbate.

[0011] The invention of claim 4 is the invention of claim 1 or claim 2.
In the invention of the above item (1), the treatment agent is a treatment agent for rearing aquatic organisms comprising one or both of citric acid and citrate.

[0012] The invention of claim 5 is the invention of claim 1 or claim 2.
In the invention, the treatment agent is an antibacterial treatment agent comprising one or both of lactic acid and lactate.

[0013] The invention of claim 6 is the invention of claim 1 or claim 2.
In the invention, the treating agent is a treating agent for deodorization comprising one or more of citric acid, citrate, ascorbic acid, ascorbate, lactic acid and lactate.

According to a seventh aspect of the present invention, in the first, second, third, fourth, fifth or sixth aspect of the present invention, the treating agent comprises a treating agent containing an effective microorganism. It was done.

[0015] The invention of claim 8 provides a treatment agent comprising ascorbic acid, citric acid, lactic acid, succinic acid, oleic acid, tartaric acid and one or more of the salts of the above-mentioned acids dissolved in water. The basic constitution of the present invention is to mix water and gypsum in which a treatment agent is dissolved to form a hydrated solid at normal temperature.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a process for producing a slowly dissolving water treatment agent according to the present invention. In the figure, 1 is a process for adjusting a treatment agent, 2 is a process for dissolving a treatment agent, 3 is an adjustment process for gypsum, Denotes a treatment agent / gypsum mixing step, and 5 denotes a hydration solidification step.

In the treatment chemical preparation step 1, one or more treatment chemicals A of ascorbic acid, citric acid, lactic acid, succinic acid, oleic acid, tartaric acid and salts of the above-mentioned acids are used.
Is charged into a mixing tank, where it is stirred and mixed. For example, when the slowly soluble water treatment agent is used as a treatment agent for dechlorination in water, one or both of ascorbic acid and ascorbate are adjusted here in a specified amount.

When the slowly soluble water treatment agent is used as an antibacterial treatment agent, one or both of lactic acid and lactate are adjusted in a specified amount.

Further, when the slowly soluble water treating agent is used as a deodorizing agent for water, one or more treating agents A of citric acid, citrate, ascorbic acid, ascorbate, lactic acid and lactate are used. Is charged into a mixing tank, where it is stirred and mixed.

When the treatment agent A is a solid, the treatment agent A is subjected to a treatment such as pulverization in the adjusting step 1 so as to be adjusted so as to be easily dissolved in water.

The treatment chemical A _O adjusted in the adjusting step 1
Is sent to the treatment chemical dissolving step 2, where a predetermined amount of water is added and stirred to form dissolved water C of the treatment chemical. If necessary, a so-called useful microorganism F having a bactericidal action or an action of oxidatively decomposing odor-causing substances and the like.
Is mixed into the dissolved water C in the dissolving step 2 (or the next treatment agent / gypsum mixing step).

On the other hand, the gypsum H is pulverized and weighed in the gypsum adjusting step 3, and is made into a slurry by adding water as needed. The gypsum (or gypsum slurry) D adjusted in the gypsum adjusting step 3 is sufficiently stirred and mixed in the treatment agent / gypsum mixing step 4. If necessary in the treatment agent / gypsum mixing step 4, appropriate water is added thereto.

The weight ratio Ao / D of the treatment agent Ao and the gypsum D mixed in the treatment agent / gypsum mixing step 4 is adjusted according to the dissolution rate of the treatment agent Ao dissolved in water. When increasing the dissolution amount (high dissolution rate), Ao / D is selected to be large, and when decreasing the dissolution amount (dissolution rate is low), Ao / D is selected to be small. Generally, the mixing ratio (weight ratio) D / (D + Ao) of gypsum D is set to 20% or more, and when the mixing ratio of gypsum D becomes 20 wt% or less, dissolution of the treatment agent Ao in water is quick. Too much.

The mixed fluid E of the two mixed and stirred in the treatment agent / gypsum mixing step is sent to the hydration and solidification step 5, where the mixed fluid E having fluidity is filled in a predetermined mold. . Further, the filled mixed fluid E is maintained at room temperature for a certain period of time, during which the so-called gypsum hydration and solidification progresses, and the treatment agent Ao and the gypsum D, which are final products, are solidified as an inseparable solid solution. A water treatment agent is formed.

FIG. 2 shows an example of the use of the slowly dissolving water treatment agent according to the present invention, and shows a case where so-called antibacterial water is used to obtain it easily. In addition, the slowly soluble water treatment agent according to the present invention not only produces the antibacterial water shown in FIG. 2, but also removes residual chlorine in water, promotes the growth of aquatic organisms and reduces diseases, reduces malodorous substances in water, and reduces human body odor. It can also be used to maintain skin health (applied to bathing and showering), prevent the generation of algae in water, purify and clear water by accelerating the decomposition of organic matter in water, and control the growth of bacteria and Escherichia coli in water. What can be done is, of course.

Referring to FIG. 2, the antibacterial water producing container 6 is a closed container having an inlet 6a and an outlet 6b, and the inlet 6a is attached to a tap 7 of a tap. The antibacterial water-generating container 6 is filled with a slowly dissolving water treatment agent G for antibacterial use, and tap water 8, which is water to be treated, flowing out of the faucet 7 flows into the antibacterial water-generating container 6 from the inflow port 6a, It passes through the filling region of the slowly soluble water treatment agent G and flows out from the outlet 6b. The antibacterial component of the slowly soluble water treatment agent G (ie, treatment agent A) can be appropriately selected depending on the purpose of use of the antibacterial water and the like. Preferred antimicrobial components for food include lactic acid, citric acid, ascorbic acid, malic acid, succinic acid, or salts or high molecular compounds thereof.

When the tap water 8 passes through the inner region of the antibacterial water generating container 6, that is, the region filled with the gradually soluble water treating agent G, during this time, the antibacterial component in the tap water 8 is contacted with the gradually soluble water treating agent G. And the tap water 8 is subjected to antibacterial treatment. Then, the tap water that has been subjected to the antibacterial treatment, that is, the antibacterial water 8a, flows out of the outlet 6b of the antibacterial water generation container 6. In addition, an appropriate antibacterial water passage or equipment can be connected to the outlet 6b as needed.

[0028]

As described above, the tap water 8 can be subjected to the antibacterial treatment only by passing through the antibacterial water generating container 6, and the antibacterial water 8a can be generated very simply and efficiently. Moreover, impurities such as germs contained in the tap water 8 to be treated are not removed by physical adsorption using a filter medium or activated carbon, but by dissolution and elution of antibacterial components. Therefore, good antibacterial treatment can be performed over a long period of time without causing a problem such as propagation of various bacteria in the filling region of the slowly soluble water treatment agent G, and almost no maintenance is required.

Further, by adjusting the weight ratio of gypsum in the hydrated solid which is the slowly dissolving water treatment agent G, the amount of the treatment chemical dissolved in water (dissolution rate) can be easily adjusted.
It is possible to completely prevent adverse effects and the like caused by dissolution of excessive processing chemicals.

Further, the gypsum, which is a mixture, is inorganic, has a pH close to neutral, and is a chemically stable substance. Therefore, the stability of the treatment agent A can be maintained for a long time without reacting with the treatment agent A to alter the quality thereof.

In addition, since the hydration-solidification of the gypsum mixed fluid proceeds sufficiently even at room temperature, no special energy consumption is required, and gypsum can be obtained at relatively low cost. Molding can be made relatively freely due to good fluidity. As a result, the production cost of the slowly soluble water treatment agent can be significantly reduced. The present invention has excellent practical utility as described above.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an example of a production process of a slowly soluble water treatment agent according to the present invention.

FIG. 2 shows an example of water treatment using the slowly soluble water treatment agent according to the present invention.

[Brief description of reference numerals]

1 is a treatment agent adjustment step, 2 is a treatment agent dissolution step, 3 is a gypsum adjustment step, 4 is a treatment agent / gypsum mixing step, 5 is a hydration solidification step, 6 is a treatment container, 7 is a faucet, and 8 is a tap. Water, A
Ao is a treatment agent, H is gypsum, C is treatment agent dissolving water, D is gypsum (or gypsum slurry), E is a mixed fluid of gypsum and treatment agent, and G is a solidified slowly soluble water treatment agent.

Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI C02F 1/50 520 C02F 1/50 520B 532 532C 540 540F 560 560Z

Claims (8)

[Claims] 1. A treatment agent comprising one or more of ascorbic acid, citric acid, lactic acid, succinic acid, malic acid, oleic acid, tartaric acid and salts of each of the above-mentioned acids is added to a hydrated solid gypsum. A slowly dissolving water treatment agent characterized by containing it. 2. The gypsum content in the hydrated solid is 20 wt.
% Of the water-soluble water treatment agent according to claim 1. 3. The slowly dissolving water treatment agent according to claim 1 or 2, wherein the treatment agent is a treatment agent comprising one or both of ascorbic acid and ascorbate. 4. The slowly dissolving water treatment agent according to claim 1 or 2, wherein the treatment agent is a treatment agent comprising one or both of citric acid and citrate, for breeding underwater organisms. 5. The slowly dissolving water treatment agent according to claim 1 or 2, wherein the treatment agent is a treatment agent comprising one or both of lactic acid and lactate. 6. The method according to claim 1, wherein the treating agent comprises one or more treating agents of citric acid, citrate, ascorbic acid, ascorbate, lactic acid, and lactate. Slowly soluble water treatment agent. 7. The treatment agent according to claim 1, wherein the treatment agent is a treatment agent containing an effective microorganism.
The slowly soluble water treatment agent according to claim 5 or 6. 8. A treatment agent comprising one or more of ascorbic acid, citric acid, lactic acid, succinic acid, oleic acid, tartaric acid and salts of the above-mentioned acids is dissolved in water, and the treatment agent is dissolved. A method for producing a slowly dissolving water treatment agent, characterized in that water and gypsum are mixed to form a hydrated solid at normal temperature.