Titanium electrode manufacturing method

IPC classes for russian patent Titanium electrode manufacturing method (RU 2476624):

C25B11 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR

Another patents in same IPC classes:

Bipolar electrolysis unit for obtaining hydrogen and oxygen mixture / 2476623

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Removal of silicon from solution / 2476379

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Method of conducting electrolysis and apparatus for realising said method / 2475569

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Water electrolytic generator gate / 2474624

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Method and complex for preparing of bottled oxygen- saturated water / 2246882

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Method of saturation of water with oxygen and plant for realization of this method / 2247081

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Electrode, apparatus and method for electrolytic treatment of liquid, system for regenerating soil in situ and unit for performing reduction-oxidation reactions / 2247175

Electrode includes elongated, mainly hollow body made of porous material characterized by comparatively low electric conductivity, connector in the form of elongated electrically conducting member connected to power source. Connector passes along inner cavity of electrode body and it has contact with surface of inner wall of body in large number of places mutually spaced along length of body for distributing electric current supplied from power source practically uniformly along electrode.

Electrode, apparatus and method for electrolytic treatment of liquid, system for regenerating soil in situ and unit for performing reduction-oxidation reactions / 2247175

Method of a ferric iron hydroxide hydrosol production / 2250914

The invention is intended for a chemical industry, an agriculture and pedology and may be used at production of solutions for soils reclamation. 0.5 l of a ferric chloride solution with concentration of 0.5 l/mole gram-molecule is poured into a pan. Carbon electrodes are put into the solution. Pass a current of 1А. Each 5-60 seconds polarity of the electrodes is changed. In a result of replacement of anions of the salt for ions of the hydroxyl obtain a stable hydrosol of the ferric iron hydroxide. The invention allows to produce such sols using a simple and a production-friendly method commercially.

Preparation of vanadium electrolyte with aid of asymmetric vanadium-reducing electrolyzer and use of asymmetric vanadium-reducing electrolyzer for reducing electrolyte charge state balance in operating reduction-oxidation vanadium battery / 2251763

Novelty is that acid vanadium electrolyte liquor that has in its composition V⁺³ and V⁺⁴ in desired concentration ratio introduced in electrolyte solution is produced from solid vanadium pentoxide by electrochemical method while at least partially reducing dissolved vanadium in acid electrolyte liquor; for the purpose electrolyte liquor is circulated through plurality of cascaded electrolyzers at least partially to V⁺³ degree; in this way reduced vanadium incorporating electrolyte liquor leaving the last of mentioned electrolyzers enters in reaction with stoichiometric amount of vanadium pentoxide to produce electrolyte liquor incorporating in effect vanadium in the V⁺³ form; acid and water are introduced to ensure definite molarity of liquor and the latter is continuously circulated through cascaded electrolyzers; stream of electrolyte liquor produced in the process that incorporates V⁺³ and V⁺⁴ in desired concentrations is discharged at outlet of one of electrolyzers of mentioned cascade. Each electrolyzer is distinguished by high degree of asymmetry and has cathode and anode of relevant surface morphology, geometry, and relative arrangement for setting current density on anode surface exceeding by 5 to 20 times that on projected cathode surface, oxygen being emitted from anode surface. Asymmetric electrolyzer of this type can be used in one of electrolyte circuits, positive or negative, of operating battery (cell) for reducing balance of respective oxidation degrees of their vanadium content.

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The invention is pertaining to technologies of electrochemical productions, in particular, to devices for electrolysis of water. The generator of a hydrogen-oxygen mixture contains at least one cylinder with a jacket of cooling, automatic inlet and outlet gates, a piston and a head of the cylinder forming a self-contained volume of the cylinder, a connecting rod gear linked wit a drive. The electrolyzer is made in a hermetic body with a cooling jacket with a capability of an easy passing through it of an electrolyte water solution. The electrolyzer is made in the form of two electrodes - half-blocks with a positive allowance entering each other. A device of the electrolyte cycle batch feeding into the electrolyzer is made in the form of a high-lift pump kinematically or through a control package is linked with the connecting rod gear and is supplied with the injector. The technical effect consists in an increase of productivity of the generator and its operating safety.

Electrolysis-water gaseous generator / 2252276

The invention is pertaining to the field of welding and may find application in devices of a gas-flame treatment of materials. The electrolysis-water gaseous generator contains a hermetic body made in the form of a rectangular container with a liquid, in the internal grooves of which there are two packages of metal plates shifted in respect to each other. At that the last and the first plates of the two packages are electrically connected. The generator contains a tight cylinder with a volume for automatic feeding of a liquid, a bubbler, a gas-mixer, an outlet connection pipe with a torch and a control circuit with the liquid level and pressure operated magnetic contacts located in a tight pipe, on the outer side of which there are a floater and a magnet. The length of the tight cylinder volume of automatic feeding of a liquid and its diameter are exceeding the length and width of the hermetic rectangular body accordingly. The shape of the upper part of the body is compatible with the cylindrical form of the volume of the automatic feeding, above which there are in series located a tight elastic dielectric spacer and the cylindrical volume of automatic feeding of a liquid. The height of the metal plates of the two packages does not exceed the height of the lower part of the cylindrical volume used for automatic feeding of a liquid, which similarly to the elastic dielectric spacer also has a through groove located in the area of displacement of the two packages of metal plates, which is ensuring formation of a gas cushion above a package of the metal plates and automatic feeding of a liquid. The technical effect is an essential simplification of the design of the device for the gas-flame treatment of materials.

Electrolysis-water gaseous generator / 2252276

Electrolyzer / 2252921

Electrolyzer includes two electrodes (one electrode of stainless steel and other electrode of carbon); bridge type voltage rectifier; electric circuit plug; membrane; second doubled membrane - cover, for example of tracing paper or canvas; glass vessel; low-resistance voltage divider with taps; array of light emitting diodes with additional resistors whose number corresponds to that of taps; housing of electrolyzer. Plug is connected with inlets of bridge type voltage rectifier; negative outlet of voltage rectifier is connected with electrode of stainless steel. Second positive-polarity outlet of voltage rectifier is connected through low-resistance voltage divider with taps to carbon electrode arranged in second membrane-cover. All cathode ends of light emitting diodes with additional resistors are connected in parallel and they are connected with positive outlet of voltage rectifier; second ends of said diodes are connected with respective taps of low-resistance voltage divider.

FIELD: metallurgy.

SUBSTANCE: manufacturing method of titanium electrode (cathode) used for electrolysis of liquid involves pre-treatment of titanium electrode surface in water solution containing 300-350 g/l of hydroxylamine hydrochloride, 40-50 g/l of acid ammonium fluoride during 1-2 minutes at the temperature of 80-90°C, cleaning with hot water and further treatment in water solution of ammonium fluoride 20-25 g/l and 1-1.5 g/l of urotropine during 0.5-1 minute at the temperature of 18-25°C. The above method involves treatment of electrode surface of any shape, including flat, cylindrical, meshed, coaxial and bar ones, etc.

EFFECT: improvement of catalytic activity of electrode surface, which provides low overpressure at the specified current density, is the technical result of the proposed invention.

2 cl, 2 dwg

The invention relates to the field of electrochemical technology and relates to a method of manufacturing titanium electrodes (cathodes), used in the construction of devices of electrolysis.

The technical result of the invention is to increase the catalytic activity of the surface of the electrode if the electrode is used.

The number of known structures electrolysis devices containing titanium electrodes of various configurations, aimed at increasing the efficiency of the electrolysis device.

For example, a device for electrochemical treatment of a liquid EN 2063932 from 20.07.1996 containing electrochemical cell made of titanium vertical coaxial cylindrical and rod electrodes.

According to the patent RU 26796 from 20.12.2002 known flow-through electrolysis cell consisted of a tank located on its opposite walls of the inlet and outlet nozzles and means for supplying current. In the tank are the group of titanium monopolar and bipolar vertical plate electrodes.

Also known device for electrolysis implemented in EN 2199610 from 27.02.2003 containing vertically mounted electrodes.

From RU 70896 from 03.08.2007 and EN 86188 from 11.01.2009 known electrolyzer containing a package of parallel rows of bipolar and monopolar of plastic who's titanium electrodes.

The techniques used in the above structures, although allow you to solve the problem of electrolysis, however, are not sufficiently effective.

The essence of the proposed method lies in the fact that to increase the effective electrode surface and ensure a sufficiently low voltage, at a given current density, the surface of the titanium electrode is treated in an aqueous solution containing 300-350 g/l hydrochloric acid hydroxylamine, 40-50 g/l acidic ammonium fluoride, within 1-2 min at 80-90°C.

Then titanium electrodes are washed in hot water and treated in an aqueous solution of ammonium fluoride 20-25 g/l and 1-1,5 g/l of urotropine for 0.5-1 min at a temperature of 18-25°C.

The new method is that while there is an increase in the catalytic activity of the surface of the electrode if the electrode is used.

As shown by experiments in the electrolysis of aqueous solutions of chlorides of alkali metals, the above reception leads to an increase in the concentration of active chlorine in the resulting product - sodium hypochlorite - 5-10%.

For the experiment was collected electrolysis unit, depicted in figure 1. In the vessel (1) is an aqueous solution of sodium chloride concentration of 30 g/L. In the first case, the pilot activated titanium cathode (2), forming together the ones with the anode (3) of the electrolysis cell, immersed in the solution and has a potential of 3.5 V from the DC source (4). The concentration of active chlorine in the sodium hypochlorite is measured by iodometric method according to GOST 18190-72 with pre-dilution of samples 1000 times.

In the second case, instead of the activated cathode is used control conventional titanium cathode.

Figure 2 shows a plot of the concentration of active chlorine from the time of electrolysis activated for (Row 1) and normal (Bank 2) cathode.

As can be seen from the graph, at a given current density over time the value of the concentration of active chlorine in the sodium hypochlorite in the tank with the experimental activated cathode more by 5-10%than in the capacity to control a conventional cathode.

Thus, the titanium cathode active surface increases the efficiency of the electrolysis cell by active chlorine.

The example shows that in the case of manufacturing a titanium electrode of the proposed method is able to achieve more efficiency electrolysis devices, using in its construction, the electrodes of any shape (planar, cylindrical, wire, coax, rod or any other).

From the above description it is clear that the present invention can be implemented not only in the CE is provided with the considered example implementation, but in other specific forms without departure from the essence of the invention defined by its formula.

1. A method of manufacturing a titanium electrode (cathode)used for electrolysis of liquid, characterized in that, to increase the effective electrode surface (increase of catalytic activity) and provide a sufficiently low voltage, at a given current density, after pre-processing the surface of a titanium electrode in an aqueous solution containing 300-350 g/l hydrochloric acid hydroxylamine 40-50 g/l acidic ammonium fluoride within 1-2 minutes at a temperature of 80-90°C, titanium electrodes are washed in hot water and then treated in an aqueous solution of ammonium fluoride 20-25 g/l and 1-1,5 g/l of urotropine for 0.5-1 min at a temperature of 18-25°C.

2. A method of manufacturing a titanium electrode according to claim 1, characterized in that it can be applied to the electrodes of any shape (planar, cylindrical, wire, coax, rod or any other form).