Method of preparing concentrate of silver oxides

FIELD: chemistry.

SUBSTANCE: invention relates to methods of preparing a concentrate of silver oxides and can be used in making highly effective preparations in medicine and veterinary science. The method involves pouring distilled water at 80°C into a chemically clean glass vessel, immersing a silver ion source holder into the water, connecting a direct current circuit and stirring the solution after appearance of electrical conductivity detected by a milliamperemetre. Stirring is repeated several times before appearance of excess concentration of silver ions in form of a brown, then black colloidal solution. The process is stopped when electrical conductivity falls. Silver oxides are removed from the electrodes into a prepared solution. The remaining solution cooled to room temperature is then separated in a centrifuge. The purified solution is then recycled and the precipitate with a small amount of water is poured into a container made from dark glass with minimal air space for subsequent storage.

EFFECT: obtaining a concentrate of silver (I) oxide which can be used to prepare a solution of silver ions for medical preparations by dissolving in distilled water and filtration of insoluble silver oxides.

2 cl

 

The invention relates to methods of producing silver-bearing concentrates, such as silver oxide (1), and can be used in the manufacture of high-performance compounds for medicine and veterinary medicine, have low toxicity and allergenicity, as well as reliable reproducible physico-chemical characteristics.

A method of obtaining silver oxide (I) under the action of caustic soda or caustic potash solution of nitric silver salt by reaction

2AgNO3+ 2KOH = Ag2O + H2O + 2KNO3

The reaction results in a brown-black precipitate of silver oxide (I) (see Encyclopedic dictionary Brockhaus and Efron (Reprint reproduction of the edition Pasricha-Iaeme 1890 Publishing center "TERRA", 1992, vol 58, str).

The disadvantage of this method is the presence in the sediment nitrate, which reduces the possibility of its use for medical purposes. An aqueous solution of silver oxide (I)obtained by the above method can only be used externally as an antiseptic.

Proposed in the framework of the present invention a method of obtaining a concentrate of the oxides of silver using metallic silver, distilled water, constant current source and milliammeter, connected in series in a circuit that has no analogues.

Getting concentrate ASU is coming as follows.

Distilled water, heated to 80°C., poured into a clean glass dish. In the water submerge the cartridge of ionator silver, connect a constant current source.

In the beginning of the process milliammeter indicates zero values (0,00 mA), no ions in the water, accordingly, no current of electrons in the circuit. However, due to the fact that the voltage on the electrodes is, the process of decomposition of water into hydrogen, slowly moving towards the cathode, and oxygen moving to the anode and causing anodic oxidation, with the formation of the electrode film of silver oxide (I), which, in turn, spontaneously dissolves in water dissociation on silver ions and hydroxyl, giving rise to conductivity part of the solution, limited displacement of the inner part of the cassette.

After the advent of the electric conductivity, indirectly detected milliammeter in the form of small values of current (0,01-0,02 mA) indicate that within the video appeared enriched with silver ions, a part of the solution, cassette mix the solution by transferring the enriched part of the solution in the General solution, thereby increasing the electrical conductivity of the overall solution. Repeatedly repeating the cycle anodic oxidation and accordingly enrichment solution of the inner part of the cassette of ionator and mixing (unloading enriched part in the overall solution), reach affectionately saturation, and then the supersaturation of the solution. Stirring is repeated several times until the excess concentration in the form of turning brown, then black colloidal solution. In electrochemical dissolution in the electrolyte (according to the Faraday law) is the process of deposition of metallic silver on the cathode.

Metallic silver is deposited on the cathode, forming a kind of loose spongy plaque, leading to the decrease of electrical conductivity of the solution, and the milliammeter is starting to show values on a few milliamps below the maximum value achieved. The process respectively, due to failing to stop it.

Oxides with electrodes clean made in solution. Then the solution is cooled to room temperature and stand for crystallization of oxides of silver. The finished solution is the basis of the average force with pH=9,0-9,5, where the silver oxide (I) dissociative ions Ag+ and OH-due to the hydration of ions. During the sedimentation process of polarizazii solution: 2AgOH=Ag2O·H2O.

This process is controlled by the reduction and stabilization of the pH to 8.0. As a result of crystallization is formed intermediate compound, an aqueous silver oxide Ag2O·H2O or, more properly hydrated silver [AgOH]2where the water molecule is included in crystallise the kind of structure of silver oxide (I).

When drying the sludge water is lost, and with it disappear alkaline properties. So, for example, the dried silver oxide (I) when dissolved in distilled water (saturated solution) gives a very weak alkalinity pH of 7.0, and 7.1, and an aqueous silver oxide gives a stable alkalinity pH=8,0, which is extremely vital enhances the healing properties of silver oxide (I). For this reason, invalid drying of the concentrate.

The precipitate, consisting of silver oxide (I) with impurities insoluble particles of silver oxide (II) and metallic silver, share in the centrifuge.

The purified solution is again put into circulation, and the residue with a small amount of water poured into a vessel made of dark glass with a minimum air gap for subsequent storage.

The process is conducted at a red or orange light.

The result of these operations is obtained concentrate silver oxide (I), which can be used to obtain a solution of ionic silver for medical preparations by dissolving in distilled water and filtering the insoluble oxides of silver.

Insoluble oxides are utilized and deposited in the state Fund for further refining.

1. A method of obtaining a concentrate of silver oxide, characterized by the fact that distilled water, heated to 80°C., poured into a chemically clean glassware for the eat to the water submerge the cartridge of ionator silver plug in the DC circuit, after the advent of the electric conductivity detected by the milliammeter, mix the solution, stirring is repeated several times until the excess concentration of silver ions in the form of turning brown, then black colloidal solution, after the fall of the electric conductivity of the process to stop it, clean off the oxide of silver electrodes made in the solution, then cooled to room temperature, the pooled solution separated in the centrifuge, the purified solution is again put into circulation, and the residue with a small amount of water poured into a vessel made of dark glass with a minimum air gap for subsequent storage.

2. The method according to claim 1, characterized in that the process of obtaining silver-lead concentrate at a red or orange light.



 

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