RU2248941C1 - Method for production of silver ion-containing disinfectant solution - Google Patents

Abstract

FIELD: chemical methods for production of silver ion-containing disinfectant solution.

SUBSTANCE: silver concentration is carried out by chemical reaction and simultaneous dissolution in distilled water at room temperature of composition containing (g/l): powder citric acid 1.0-5.0; silver oxide 0.3-1.5; hydrogen peroxide 1.5-7.5; and balance: distilled water. Time of silver concentration is limited by reaction time.

EFFECT: non-toxic high stable disinfectant aqueous solution useful both in field conditions and stationary domestic objects.

2 cl, 3 ex

Description

The invention relates to a chemical method for producing disinfectant solutions based on silver ions and can be used in various fields of the national economy (healthcare, veterinary medicine, food and pharmaceutical industries, public utilities, etc.), where disinfectants are used, for example, in medicine for disinfection various objects for disinfection of water in swimming pools, disinfection and conservation of drinking water from open fresh water bodies (rivers, lakes), underground chiselnikov (artesian water intake) and drinking water supply.

A known method of producing a disinfectant solution based on silver ions (Kulsky L.A., Silver Water, Kiev, Naukova Dumka, 1983, p.17-32), which consists in obtaining silver ions in solutions by electrolysis.

The same electrolysis method is used to obtain a disinfectant aqueous solution (RF patent No. 2125971, publ. 02/10/1999) using a silver anode and the presence of citric or acetic acids in the solution.

Concentrates of silver-containing disinfectants and disinfecting solutions based on them are also known (application of the Russian Federation No. 2001113032, publ. 07/10/2003), for which the method of electrolytic dissolution of a silver anode in distilled water in the presence of citric acid and hydrogen peroxide is also used in the following ratio of components, wt .%:

silver (Ag) ions 0.1-10 ^-3 -1.0

citric acid 0.25-5.0

hydrogen peroxide up to 10

distilled water the rest

The prototype of the proposed method for producing a disinfectant solution based on silver ions, as the closest in combination of essential features, the method of obtaining a silver-containing reagent for disinfection and preservation of water (application of the Russian Federation No. 2000109343, publ. 10.03.2002), in which the concentration of silver in water carried out by electrolysis in the presence of phosphoric acid and ammonium persulfate with the addition of hydrogen peroxide after electrolysis.

Common disadvantages of analogues and prototype are:

multi-stage electrolysis process, requiring power consumption,

the presence of special equipment (power source, exhaust and fresh ventilation),

the presence of a specialist in this process,

use of pure silver as the main reagent.

The task of the invention is to provide a simple, quick, labor-saving and not requiring stationary conditions and special equipment method for producing a disinfectant solution based on silver ions.

The problem is achieved in that the disinfectant solution based on silver ions is produced by concentrating silver as a result of chemical interaction while simultaneously dissolving in a distilled water at room temperature a dry mixture of powders (composition) of citric acid, silver oxide and hydrogen peroxide.

To obtain a disinfectant solution with a silver ion concentration of 200 mg / l to 1000 mg / l, a mixture of powders from the above substances is used in the following proportions:

silver oxide (0.3-1.5) g / l

citric acid (1.0-5.0) g / l

hydrogen peroxide (1.5-7.5) g / l

distilled water the rest

A method of obtaining a disinfectant solution based on silver ions is as follows.

In a glass container with a given volume of distilled water at room temperature, predetermined amounts of citric acid, silver oxide and hydrogen peroxide are simultaneously dissolved.

As a result of a chemical reaction, silver citrate is formed in distilled water, which is an active ingredient in the disinfecting solution. One of the options for the formation of silver citrate can be represented as follows:

During the chemical reaction, hydrogen peroxide, participating in the formation of silver citrate, decomposes into water and oxygen. Unreacted hydrogen peroxide (remaining in the solution) enhances the bactericidal properties of the solution.

When silver oxide is dissolved in distilled water in the presence of hydrogen peroxide and citric acid, a small amount of pure silver precipitates. Silver is used to produce silver oxide, which can be reused to obtain the composition.

The proposed method for producing a disinfectant solution by chemical reaction of the above mixture of components combines:

high level of disinfection of the resulting solution in relation to a wide range of microorganisms,

storage stability

environmental safety and technological wastelessness,

low toxicity and low corrosivity to ferrous and non-ferrous metals,

explosion and fire safety,

simplicity of obtaining an active substance.

A quantitative assessment of the concentration of silver ions in the resulting solution by the proposed method was carried out according to the method of quantitative chemical analysis (KHA), certified by the State Scientific Metrological Center "All-Russian Scientific Research Institute of Physical, Technical and Radio Engineering Measurements", 06.06.1997, No. 001-59 -99 and designed to determine the mass concentration of silver ions in natural, waste and other aqueous solutions directly at the sampling site or in laboratory conditions with a potential by the metric method using the “Ekom-Ag” ion-selective electrode.

The range of detectable concentrations of silver ions is from 1 to 10,800 mg / dm ³ .

The relative error in measuring the mass concentration of silver ions by this method: not more than 10% in the range of mass concentrations from 1 to 10800 mg / dm ³ .

The possibility of implementing the proposed method for obtaining a disinfectant solution based on silver ions is shown in the following examples:

Example 1

A mixture of dry powders of the following composition, g:

silver oxide 0.3

citric acid 1.0-5.0

hydrogen peroxide 1.5

placed in an open glass container at room temperature and dissolved in one liter of distilled water. As a result of a chemical reaction after complete dissolution of the starting materials within 10-12 hours, a disinfectant solution with a silver ion concentration of 180-200 mg / L is obtained.

Example 2

A mixture of dry powders of the following composition, g:

silver oxide 0.6

citric acid 1.0-5.0

hydrogen peroxide 3

placed in an open glass container at room temperature and dissolved in one liter of distilled water. As a result of a chemical reaction, after complete dissolution of the starting materials within 10-12 hours, a disinfectant solution with a concentration of silver ions of 360-400 mg / l and a small precipitate of pure silver, which can be used to produce silver oxide, are obtained.

Example 3

A mixture of dry powders of the following composition, g:

silver oxide 1.5

citric acid 1.0-5.0

hydrogen peroxide 7.5

placed in an open glass container at room temperature and dissolved in one liter of distilled water. As a result of a chemical reaction, after complete dissolution of the starting materials within 10-12 hours, a disinfectant solution with a silver ion concentration of 950-1000 mg / L and a small precipitate of pure silver are obtained, which can also be used to produce silver oxide and reused to obtain a composition.

Thus, the inventive method for producing a disinfectant solution based on silver ions obtained by a chemical method is simple, easy, environmentally safe and waste-free.

The application of the proposed method will have in the arsenal of the national economy a non-toxic, bactericidal, highly resistant disinfecting aqueous solution that can be used to disinfect and sterilize various objects both in the field and in stationary household objects.

Claims (2)

1. A method of obtaining a disinfectant solution based on silver ions, comprising concentrating silver in distilled water, characterized in that the silver concentration is obtained as a result of a chemical reaction while simultaneously dissolving in distilled water at room temperature a composition of powders of citric acid, silver oxide and hydrogen peroxide at the following concentration of the starting components, g / l: Silver oxide 0.3-1.5 Citric Acid 1.0-5.0 Hydrogen peroxide 1.5-7.5 Distilled water 2. The method of obtaining the disinfectant solution according to claim 1, characterized in that the silver concentration time is limited by the time of the chemical reaction of the reagents.