Liquid purification or separation – Processes – Chemical treatment
Patent
1987-01-21
1988-10-11
Wyse, Tom
Liquid purification or separation
Processes
Chemical treatment
210501, 422 28, C02F 150
Patent
active
047769637
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a sterilizing water-purifying reagent for drink for removing muddiness or sterilizing water to be treated to produce drinking water in the field or under a drinking water shortage situation.
BACKGROUND ART
As recently reported in the newspapers, not only food shortages but drinking water shortages have become serious problems in Africa. A shortage of water can be avoided by drinking water from rain or from a river, but disease or infectious illness may occur due to pathogenic bacteria contained in water. To remedy such problems, sterilizing water-purifying reagents for drink to produce drinking water are strongly recommended such in urgent emergencies so as to rescue human lives.
If water from rain or a river can be immediately purified for drinking water, it is much more convenient even in field activity in fields such as a camp since it is not necessary to carry a canteen of heavy weight without limit of carriage.
A portable purifier is heretofore known, as disclosed, for example, in Japanese Patent Publication No. 40148/1977 official gazette, in which fluoride is added to water, fluoric ions are produced by ionization according to energization with a current, and bacteria contained in the water are sterilized to be purified by the fluoric ions thus produced. However, this purifier requires lumped or particular self-soluble electrode to be filled so as to flow a galvanic current as portable energizing means, which is expensive and cannot be employed as the sterilizing water-purifying reagent for drink to be supplied in large quantity to aid in Africa and the like as described above.
An object of this invention therefore is to provide a sterilizing water-purifying reagent for drink which is harmless for human body is capable of being inexpensively synthesized in industry and is excellent in removing muddiness and sterilizing bacteria.
Another object of the invention is to provide a sterilizing water-purifying reagent for drink capable of inexpensively producing a simple water purifier.
DISCLOSURE OF THE INVENTION
This invention relates to a sterilizing water-purifying reagent for drink comprising an acidic additive which contains, as main ingredients, various types of metal salts and nonmetal salts produced by dissolving vermiculite weathered from mica mineral or soil further weathered from the vermiculite in a aqueous inorganic acid solution.
The acidic additive of the invention can insolubilize organic materials dissolved in sewage and sterilize bacteria.
The mica mineral used in the invention preferably employs black mica in view of the effect of insolubilization and agglomeration of organic materials. That is, the vermiculite of black mica and soil further weathered from the vermiculite of black mica is most preferable as raw materials.
To produce the sterilizing water-purifying reagent for drink of the invention, a 25% aqueous sulfuric acid solution is, for example, added to the vermiculite weathered from black mica at a ratio of 4:3 to 4 of the vermiculite: aqueous sulfuric acid solution by weight, and the mixture is allowed to stand for several days while sometimes stirring the mixture, or the mixture is heated to 100.degree. C. and allowed to stand for several hours while agitating the mixture. Thus, the elements such as Si, Al, Mg, Fe, K and Na, and the oxides thereof in the raw material are eluated in the aqueous sulfuric acid solution to produce sulfates, oxides, double salts and complex salts of the metals and nonmetals. In addition, small amounts of sulfates of Li, Zr, V, Ni, Co, P, Ba and S contained as elements or oxides in the raw material are also produced, but no detrimental heavy metals are contained. The aqueous solution thus produced is used as is or by concentrating or diluting the solution as sterilizing water-purifying reagent for drink. When 25% hydrochloric acid is used instead of 25% sulfuric acid and vermiculite is added at a ratio of 1:1 to the hydrochloric acid by weight and the mixture is then similarly reacted, the sterilizin
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patent: 4441996 (1984-04-01), Hurst
patent: 4505889 (1985-03-01), Amick
patent: 4518506 (1985-05-01), Green et al.
Inagaki Jitsuo
Ono Taisaburo
Shimanishi Asao
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