JP2698790B2 - Drinking water purifier and production method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a purifying agent for drinking water, and more particularly to a purifying agent for removing residual chlorine and the like in tap water and a method for producing the same.

[0002]

2. Description of the Related Art In recent years, the quality of drinking water in urban areas has been deteriorating. Although the source water of drinking water contains various chemical substances and microorganisms, it is treated for drinking water to become drinking water. It is said that the residue of chlorine for sterilization (calcium odor) used in the water treatment of the source water is the main odor.

Conventionally, a water reactor filled with activated carbon has been widely used to reduce and remove the residual chlorine. Further, as water quality improvers, those obtained by heat-activating fossil corals or natural reef-building corals, or those obtained by adding silver to these water quality improvers to have an antiseptic effect are also known ( JP-A-63-5642).

[0004]

[Problems to be solved by the invention]

[0005] The water quality improver utilizing natural coral is mainly aimed at mineral water conversion action by dissolving Ca in water and removal of chlorine. However,
The conventional water quality improver has no effect unless it is added in the order of several tens of grams per liter of drinking water, and thus has a problem in practicality. Accordingly, an object of the present invention is to provide a natural coral-based drinking water purifying agent capable of obtaining an excellent purifying action even with a small amount of addition, and a method for producing the same.

[0006]

Means for Solving the Problems The first aspect of the present invention is a drinking water purifying agent characterized by spreading a green tea extract on natural coral sand, and the second aspect of the present invention is to provide a green tea extract comprising: A drinking water purifier characterized by wrapping spread natural coral sand with a non-woven fabric, and a third aspect of the present invention is to stir and mix natural coral sand and green tea extract, and then perform drying treatment. This is a method for producing a drinking water purifier characterized by the following.

[0007] Natural coral is an aragonite-type calcium carbonate which has a different crystal form from calcium substitutes such as limestone and shell fossils and is easily soluble in water. Table 1
As shown in the above, calcium carbonate is a main component and a large amount of minerals is contained.

[0008]

TABLE 1 Ca 36.3-38.7% CaO 45.7-54.1% CaCO3 94.5-16.5% N 0.02% P 0.13% K 0.03% Na 0.24 % S 0.42% Cl 0.003% Mg 2.86 Si 0.1%

The green tea extract is known as a deodorant for foods, medicines, refrigerators and the like, and contains tannins, catechins, flavonoids and the like, and has the property of exhibiting a flavonoid effect without containing vitamin Cs. The Flavono effect is a general term for the deodorizing effect of flavonoids in green tea extract, which reduces malodorous components such as ammonia, trimethylamine hydrogen sulfide and methyl mercaptan. The method for producing the extract in green tea is described in Japanese Patent Laid-Open No. 1-25066. In other words, green tea component separation method tea, dried tea as the extraction solvent,
Using glycerin or propylene glycol alone or a mixture thereof at an extraction temperature of 180 ° C to 220 ° C, 5
By performing the extraction within about an hour, a dark brown extract is obtained. The extract is adsorbed with silica gel to adsorb the active ingredient, then distilled (back-extracted) with ethyl ether, and water is added to transfer the active ingredient in the ethyl ether into an aqueous solution to separate the green tea extract. . In the above-mentioned extraction process, when the extraction temperature is 180 ° C. to 220 ° C., vitamin C should be decomposed, and when the alcohol extract is adsorbed on silica gel, the green tea active ingredient and vitamin C are separated. Is not adsorbed on silica gel, so that green tea extract does not contain vitamin C.

The present inventor has conducted a test of removing natural coral sand and green tea extract individually and in combination with each other, and removing residual chlorine in drinking water. As a result, the natural coral sand alone shows no residual chlorine in drinking water. It takes a considerable amount of natural coral reef to remove water, but according to the combination of natural coral sand and green tea extract, it has been found that adding a very small amount to drinking water removes residual chlorine etc. in tap water did. Natural coral also tends to dissolve chlorine from seawater in drinking water, but it has been found that this tendency disappears when combined with green tea extract, and the present invention has been completed.

In the present invention, the natural coral sand and the green tea extract are combined to spread the green tea extract on the surface of the natural coral sand, which makes use of the pore activity of the natural coral reef sand, and It is most desirable in terms of removing residual elements and the like because the green tea extract exerts a rapid effect.

Further, by wrapping the coral sand on which the green tea extract is spread with a nonwoven fabric, the contact with water and the reaction in the water can be carried out quickly by utilizing the property of the nonwoven fabric that is entangled in a small mesh. In this respect, favorable results can be obtained.

[0013] The drinking water purifier of the present invention can be produced by a method of stirring and mixing natural coral sand and green tea extract, followed by drying treatment. In this case, the green tea extract (containing 50% of water) is 0.1 to 20 parts by weight with respect to 100 parts by weight of natural coral sand.
It is preferable to add so as to be parts by weight. Hereinafter, the present invention will be described in detail with reference to examples.

In the examples, natural corals having the composition shown in Table 1 were used. The green tea extract was produced by the method of Japanese Patent Publication No. 1-25066 and had the following composition. General analysis (unit: wt%)-moisture: 55.3%; fat:
0.1%; ash: 0.9%; total nitrogen: 0.83%; anhydrous caffeine: 1.7%; tannin: 19.4%; total sugar:
12.8%; ethanol: 1.43% free amino acid (unit mg / 100 g (sample) -arginine /
Lysine: 2 ↓ / 1 ↓; Histidine / Phenylalanine:
1 ↓ / 10; tyrosine / leucine: 9/9; isoleucine / methionine: 13/1 ↓; valine / alanine: 17
Glycine / proline: 1/7; glutamic acid /
Serine: 30/21; threonine / aspartic acid: 1
Tryptophan / cystine: 5/1 ↓; free tinian 278; free glutamine 1; free asparagine 7 sugar quantification (unit wt%)-fructose (fructose) 0.
96%; glucose (glucose) 0.58%; shoe cloth (sucrose) 9.00% tannins-gallic acid: 0.42%; (-)-epicaquiten: 1.1%; D-(+) citrate: 0.23% flavonoids (unit mg / 100g) -rutin / hyperline 29/12; isoquercitron / quercitrin:
6.3 / 1.9 hydrolyzed aglycone (glycoside) 37 (mg / 100
g); myricetin: 130 quercetin: 64 vitamins-total aspirinic acid (vitamin C) not detected Other: Mineral content Ca 14.6 mg / 100 g; M
g 20.9 mg / 100 g; Na 40.7 mg / 100
g; K615mg / 100g; F3ppm

[0015] 100.0 g of natural coral sand and 1.00 g of green tea extract containing 50% water were mixed, and then dried at 100 ° C. 0.1 to 0.8 g of the obtained purifying agent was added to 1 liter of tap water, and the mixture was stirred for 5 minutes. After that, residual chlorine was quantified by a method according to JIS KO102-1986 (33. Residual chlorine P86). .

[0016]

Table 2 Addition amount Residual chlorine reduction rate (g / l) (mg / l) (%) 0 0.36-0.1 0.28 22.2 0.2 0.14 61.1 0.40 .08 77.8 0.6 0.05 86.1 0.8 <0.01> 97.0

From the results in Table 2, it can be seen that natural coral sand on which the green tea extract is spread has a remarkable chlorine removing effect with a small amount of use.

Comparative Example 1 g of untreated natural coral sand was added to 1 liter of city water and stirred for 15 minutes. As a result, residual chlorine remained as city water. Table 2 shows the results.

[0019]

[Table 2] City water number Residual chlorine Ammonia Ca Mg Total nitrogen PH (24 ° C 0.22 <0.2 20.3 4.20 1.98 7.6 0.27 <0.2 21.2 4.34 1.98 7.6

Is a Toda City tap water (blank), and is a comparative example.

[0021]

As described above, according to the present invention, the cost of the water purification agent can be reduced because the water purification effect excellent in removing residual chlorine and organic substances can be achieved in a small amount; Practically remarkable advantages are obtained, such as almost no incorporation into the human body.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location C02F 1/28 C02F 1/28 G

Claims (4)

(57) [Claims] 1. A drinking water purifier comprising a natural coral sand and a green tea extract spread thereon. 2. A drinking water purifier comprising a natural coral sand on which a green tea extract is spread, wrapped with a nonwoven fabric. 3. Stirring and mixing natural coral sand and green tea extract,
A method for producing a drinking water purifier comprising drying and drying. 4. The method according to claim 3, wherein the green tea extract (containing 50% of water) is added in an amount of 0.1 to 20 parts by weight based on 100 parts by weight of natural coral sand. Method.