RU2282679C1 - Material for manufacturing of electrolytic bath electrodes - Google Patents

Abstract

FIELD: material for manufacturing of electrodes useful in liquid electrolysis, preferably drinking water.

SUBSTANCE: claimed material contains (mass %): powdered silicium 79-20; powdered graphite 20-79; and balance: binder.

EFFECT: drinking water of improved quality, enriched with silicium ions.

1 tbl, 3 ex

Description

The invention relates to electrochemical technology for processing a liquid medium and relates to a material for the manufacture of electrodes of an electrolyzer in order to obtain environmentally friendly solutions that can be used in healthcare. industry and agriculture.

Known electrolytic electrodes made of stainless steel (see Malovichko A. "Cleansing the kidneys. St. Petersburg, LLP" Respks ", 1998, S. 183).

The disadvantage of this material is that the steel anode dissolves. As a result, the liquid is saturated with ions of iron, chromium, etc., and as a result, the quality of the liquid, especially drinking water, deteriorates.

Closest to the proposed technical essence and the achieved result is a material for the manufacture of electrodes of an electrolyzer containing carbon (see RF patent for utility model No. 43542, class C 02 F 1/46, January 27, 2005).

This material is environmentally friendly and does not contaminate the liquid with harmful impurities, especially if such a liquid is used as drinking water. The disadvantage of this material is that in the process of electrolysis, it is destroyed at the molecular level. The products of destruction fall into the liquid, pollute it and make it dark.

Another serious disadvantage of the prototype is the active destruction of the anode, resulting in a reduced life.

An object of the invention is to improve the performance of the material by reducing the degree of its destruction and reducing the contamination of the liquid processed in the electrolysis.

The stated technical problem is achieved in that the material for the manufacture of electrodes of the electrolyzer containing carbon, according to the invention additionally contains powdered silicon and a binder, and as carbon - powdered graphite in the following ratio of components, wt.%:

Powder graphite 20-79 Silicon powder 79-20 Binder rest

Pure starch, sunflower oil, and other environmentally friendly substances of this purpose can be taken as a binder.

This material can be obtained as follows.

Take powdered silicon or a variety of it - powdered silicon carbide, graphite in appropriate proportions and a binder. The whole mixture is thoroughly mixed. Electrodes (anodes, and, in some cases, cathodes) are molded from this mixture by pressing and sintered in an oven at a temperature of 1800-2100 ° С.

In the manufacture of the material and the selection of ingredients proceed from the following:

Since the material is used for the manufacture of electrodes of the electrolyzer, it takes into account its electrochemical resistance (the number of cycles of electroactivation of water), electrical resistance, salinity or salinity of the treated water and the degree of saturation of water with silicon ions. It was taken into account that with an increase in the carbon content in the material, the electrical resistance of the electrode decreases and the electrochemical resistance of the electrodes (anodes) decreases. This also reduces the saturation of water with silicon ions. Such a material is most suitable for water with increased salinity - more than 1000 mg / l. A material with a high silicon content and a low carbon content has a high electrical resistance, but high electrochemical resistance. In this case, water is more saturated with silicon ions. This material is more suitable for water with low salinity.

The foregoing is confirmed by the examples below.

Example 1

The material was prepared from 20 wt.% Powdered silicon and 79 wt.% Powdered graphite. As a binder used food starch. The electrical resistance of the material did not exceed 10 Ohms, the electrochemical resistance was 1470 cycles. The content of silicon ions in water was 5.1 mg / L. It is most advisable to use such electrodes for water with a salinity of more than 1000 mg / l.

Example 2

The material was prepared from 50 wt.% Powdered silicon, 49 wt.% Powdered graphite and 1 wt.% Sunflower oil. According to the test results, the resistance of the electrodes made of this material was 1820 cycles, and the electrical resistance was 10-30 Ohms. The content of silicon ions in water was 6.5 mg / L. These electrodes can be used in the treatment of drinking water with a salinity of 500-1000 mg / l.

Example 3

The material was prepared from powdered substances - 20 wt.% Graphite and 79 wt.% Silicon and a binder - food starch 1 wt.%. Anodes for drinking water electrolysers were made from this material. According to the test results, the electrochemical resistance of this material was at least 2500 cycles of electroactivation of water (see table 1). The electrical resistance of this material was 30-50 ohms. These electrodes can be used in the treatment of drinking water (or other liquids) with a salinity of not more than 500 mg / l. The maximum content of silicon ions in water was 8.2 mg / L.

The optimal composition of the material was established during lengthy tests. The test results are summarized and shown in table 1.

Using the proposed material allows to improve the quality of the treatment of drinking water of various compositions and to ensure its saturation with silicon ions. This has a beneficial effect on human health.

Table 1 p / p The content of ingrad., Wt.% Email Chem. resistance, count cycles Electr. resistance, Ohm Mineration of water, mg / l Contents Si in water, mg / l Si FROM one. twenty 79 1500 5-10 More 5.1 2. fifty 49 1800 10-30 500/1000 6.5 3. 70 twenty 2500 30-50 Smaller 8.2

Claims (1)

A material for the manufacture of electrodes of an electrolyzer containing carbon, characterized in that it additionally contains powdered silicon and a binder, and as carbon, powdered graphite in the following ratio of components, wt.%: Powder graphite 20-79 Silicon powder 79-20 Binder Rest