RU2615519C2 - Method for producing negative red-ox potential in solutions - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to methods for treatment of water and aqueous solutions and can be applied in horticulture and food industry. The method for producing negative red-ox potential aqueous solutions involves saturation of the primary solutions with hydrogen provided from a hydrogen source. Drechsel bottle is used as a reaction vessel, Kipp apparatus is used for hydrogen generation, the duration of hydrogen saturation process is 0.5-1 hours, 0.5-2 g/l KCl or K₂HPO₄ solutions in the amount of 100 or 200 ml are used as primary solutions. The resulting redox potential of the aqueous solutions is between -150 and -400 mV.

EFFECT: invention improves this method and its implementation.

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Description

The invention relates to the field of water treatment, aqueous solutions of salts in order to change their redox properties and can be used in crop production, food industry, and power system.

Currently, in agriculture, medicine, biology, one of the important parameters of water and water systems is their redox potential (ORP).

The use of ordinary water and its solutions with dissolved gases (especially oxygen) by humans contributes in some cases to the oxidative destruction of the body's biostructures and aging. These negative processes can be slowed down if you use liquids that have reducing properties close to certain body fluids.

There is a method of treating feed water (weakly mineralized solution) of boilers in the energy sector with hydrogen in order to remove dissolved gases (oxygen, carbon dioxide, etc.), to reduce the ORP, for example, from 600 to -120 mV (CSE) and corrosion [1].

A known method and device for the electrochemical treatment of water or aqueous solutions in an electrolyzer in a cathode chamber, while changing pH and ORP [2]. The process is relatively complex and energy intensive.

A method for treating water and aqueous solutions in an electrolytic cell with a diaphragm is described. In this case, catholyte with detergent properties is formed, and can be used to disinfect water, i.e. possesses bioactivity [3].

A known method and installation for producing a liquid medium (water and aqueous solutions) with a negative potential by saturation with gaseous hydrogen [4].

Hydrogen was obtained in a cell with a nickel electrode with a solution of 30% KOH. Hydrogen was passed into the bottle upside down with 0.5 L of test water.

After passing H _{2 the} bottle (immersed in a bath of water) was closed with a cork, removed from the bath and kept upside down or on its side. The studied water was preliminarily treated at the BER-49-M type installation of the Polimin series.

Hydrogen filling at the plasma liquid treatment unit was carried out the next day, that is, 24 hours after filling, so that the ozone contained in the purified water could completely decay. After refueling, hydrogen water (30-40 ml per 0.5 l of water) was held for 24 hours.

During this time, the ORP manages to establish at the level of -200 ... -250 mV, with further exposure, the ORP can decrease to -400 mV.

This method and technology are quite complex, they require a bath with water, a treatment plant, and storage of a liquid saturated with hydrogen only in a certain position.

A method and apparatus for producing a liquid medium (water and aqueous solutions) with a negative ORP by saturating it with hydrogen under pressure contained in a container for connecting a liquid with hydrogen, and hydrogen in a gas cylinder are described. As a container, a cavitation ejector-mixer is used. Get water with an ORP of -200 mV during the processing time of 10 s [5] (prototype).

It is doubtful that in such a short period of time it was possible to achieve saturation of water with hydrogen.

In addition, the disadvantage of this method is the use of complex technology, a special mixer and the associated relatively high costs. There are no examples of the use of hydrogen-saturated water.

The technical result is a simplification of the method, including hardware design, determination of the parameters of the hydrogen treatment of an aqueous medium with negative ORP.

This is achieved by the fact that diluted aqueous solutions, for example, solutions of potassium salts (0.5-2.0 g / l) KCl or K ₂ HPO _{4, were} used as the initial liquid. As containers for the compound solution with hydrogen taken vessels type flask Drexel with a working volume of 100 or 200 ml, as the gaseous source of hydrogen (H ₂₎ was used in the device - the device type Kipp [6] in which hydrogen is obtained by reacting sulfuric acid with a metallic granular zinc - chemical reagents, or hydrogen from a cylinder.

Previously it was shown that it is desirable to take solutions of KCl or K ₂ HPO ₄ in a concentration of 0.5-2.0 g / l in a volume of 100 ml or 200 ml, then they were treated with hydrogen for 0.5-1 hours.

Example 1

Preparation of stock solutions. In volumetric flasks with a portion of reactive salts, solutions of 1 g / L KCl and K ₂ HPO ₄ were prepared.

Example 2

Preparation of a hydrogenated KCl solution 100 ml of KCl solution was loaded into a Drexel flask and hydrogen gas was passed from the Kipp apparatus gradually (approximate transmission rate of 60-70 bubbles per 1 min) until saturation for 0.5 h.

Example 3

Preparation of a saturated solution of K ₂ HPO ₄ . For this, 200 ml of a solution of K ₂ HPO ₄ was loaded into a Drexel flask and hydrogen was passed from the Kip apparatus, as in Example 2, to saturation for 1 h.

The indicators obtained after saturation with hydrogen solutions:

As can be seen from the above data, the proposed method is simpler in hardware design, the parameters of hydrogen treatment of aqueous solutions of KCl or K ₂ HPO ₄ with a negative potential are determined.

Information sources

1. Khudyakov, S.V. et al. Electrolysis methods for preparing make-up water // Thermal Engineering, 1991. - No. 11. - S. 68.

2. Patent RU 2297981, C02F 1/46, publ. 04/27/2007.

3. Bahir V.M. Modern technical electrochemical systems for disinfection, purification and activation of water. M .: VNIIMT, 1999 .-- 84 p.

4. Piskarev, I.M. et al. Redox potential of water saturated with hydrogen // Electronic Scientific Journal "Investigated in Russia" / http://www.sci-journal.ru/articles/2007/023.pdf

5. Patent RU No. 71332, C02F 1/46. Utility model A device for producing a liquid medium with a negative potential by saturation with hydrogen from 03/10/2008.

6. Ripan R., Chetyanu I. // Practical work on inorganic chemistry. M: Mir, 1965 .-- S. 55.

Claims (1)

A method of producing aqueous solutions with a negative redox potential, comprising saturating the initial aqueous solutions placed in a container with hydrogen supplied from a hydrogen source, characterized in that vessels of the type of a Drexel bottle are used as a container, a device of the Kip apparatus type is used as a hydrogen source, saturation hydrogen is carried out for 0.5-1 h, solutions of 0.5-2 g / l KCl or K ₂ HPO ₄ are used as initial solutions, the number of solutions is 100 or 200 ml, aqueous solutions are obtained oors with negative ORP from -150 to -400 mV.