Electrolytic method for obtaining ultrafine powder of dysprosium hexaboride. RU patent 2510630.
 Method of producing chlorine, caustic soda and hydrogen / 2509829Invention relates to a method of producing chlorine, an alkali metal hydroxide and hydrogen, and a computer-controlled device for carrying out the disclosed method, wherein the method includes the following steps: (a) preparing brine by dissolving an alkali metal chloride source in water; (b) removing the alkaline precipitate from the brine obtained at step (a) in the presence of hydrogen peroxide or in the presence of at most 5 mg/l active chlorine using an activated carbon filter and obtaining ready brine; (c) treating at least a portion of the ready brine obtained at step (b) at an ion-exchange step; (d) treating at least a portion of brine obtained at step (c) at an electrolysis step; (e) separating at least a portion of chlorine, alkali metal hydroxide, hydrogen and brine obtained at step (d); (f) treating at least a portion of brine obtained at step (e) at a dechlorination step, carried out in the presence of hydrogen peroxide; and (g) recycling at least a portion of the dechlorinated brine obtained at step (f) to step (a). |
 System and method for producing chemical potential energy / 2509828Invention relates to a system and a method for producing chemical potential energy and can be used in producing efficient fuel, which can be used in clean energy processes where greenhouse gases and other pollutants are neither formed nor emitted. The system for dissociating gases includes a gas component separator, an electron source capable of emitting electrons, an electric field generator, an anode and an intermediate electrode. The cathode is thermionic. The generator has energy which is sufficient for dissociation of molecules of reaction gases. The anode lies at a predetermined distance from the cathode, said distance limiting the reaction gas chamber. The gas chamber can cause interaction between electrodes and reaction gas molecules. The intermediate electrode lies next to the separator and the cathode. The intermediate electrode is capable of dissociating molecules through electrolysis on the surface of the separator to form products. Molecules of the reaction gas are at least molecules of either CO2 or H2O. The products are O2 and at least one of CO and H2. Furthermore, the method of dissociating gas molecules involves feeding molecules of reaction gases into a reactor. The reactor has a cathode, an anode and a separator between the anode and the cathode. The method involves generating an electric field between the anode and the cathode, having energy sufficient for dissociation of a reactant and for reducing molecules of reaction gases via electrolysis. The method also involves heating the electron source, having a thermionic cathode, in order to release free electrons therefrom. O2 and molecules of other products are separated and molecules of the product are output. The gas molecules are at least molecules of either CO2 or H2O. The product consists of O2 and at least one of CO and H2, or a mixture of CO and H2. |
 Method and apparatus for producing hydrogen from water (versions) / 2509719Invention relates to chemistry. According to the first version, hydrogen is produced by insulating iron rods from walls of a reactor 1 and applying high-voltage potential from a Tesla coil 14 across said rods. The reactor 1 is earthed and filled with water until a discharge forms between iron electrodes and the surface of the water. According to the second version, a flat horizontal cooled electrode 18 is insulated from walls of the reactor 1 and high-voltage potential from a Tesla coil 14 is applied across said electrode. The reactor is earthed. Thin-walled tubes 23 made of iron with a displacement device 24 are mounted vertically inside the reactor. The distance between the thin-walled tubes and the flat electrode 18 is reduced until a discharge forms. Water vapour is fed through the thin-walled tubes. |
 Electrode of ozonation plant and method of its manufacturing / 2509180Electrode of an ozonation plant represents a hollow sealed structure made of two identical membranes with a dielectric barrier on the outer surface; external and internal spacer rings that determine height of the electrode; a heat exchange attachment placed in the cavity of the electrode. Membranes made from metal or alloy with valve properties, have the shape of the disk with a central hole and flanging along the external and internal diameters, made for generation of electric discharge within the limits of active areas of the electrode. Thermal contact of internal surfaces of membranes with an attachment and spacer rings, and tightness of the electrode is provided by vacuum soldering. Preparation of the surface of parts for soldering and their protection against oxidation is carried out in environmentally pure solutions. Assembly and soldering of the structure is carried out in an assembly-soldering facility, made from metal with a lower temperature coefficient of linear expansion compared to materials of the electrode. In process of structure heating under temperature below the temperature of solder melting, thermal leveling is carried out on flat surfaces of the electrode due to directed thermal extension of spacer rings and attachment of the ribs, which helps to achieve equidistance of discharge gap of electrodes during their assembly. Simultaneously under appropriate temperatures they perform homogenisation of metal and vacuum etching of working surfaces of the electrode for subsequent creation of the dielectric barrier on them. The dielectric barrier is formed by electrochemical method in the form of an oxide film. After formation of the barrier layer on the working surfaces of the electrodes, their assembly is carried out jointly with a spacing gasket for creation of the specified discharge gap. |
 Device for gas-flame works / 2508970Invention relates to metal processing, particularly, to devices for gas-flame processing, say, soldering, welding, cutting of metals with the help of electrochemical production of detonating gas for said purposes. Proposed device comprises burner, hydraulic lock, electrolytic cell to extract hydrogen and oxygen for production of detonating gas, supply unit and pipeline. Said electrolytic cell is composed of the battery of separated electrolytic cells connected in series. Poles of the battery are connected to antipoles of supply unit. Said separate electrolytic cell represents a waste pre-discharged cell of iron-nickel alkaline accumulator. Said cells are equipped with detonating gas discharge branch pipes connected with pipeline communicated with hydraulic lock. Hydraulic lock exploits water emulsion with hydrocarbon compounds for correction of flame composition. Besides, hydraulic lock is furnished with means for separation of drops from gas mix. |
 Apparatus for electrolysis of water under pressure and method for operation thereof / 2508419Invention relates to an apparatus for electrolysis of water under pressure, which consists of an electrolysis cell with a water feed line connected to a supply unit, which is electrically connected to a control unit, receivers connected to the electrolysis cell through hydrogen and oxygen lines for accumulating hydrogen and oxygen, said receivers being fitted with hydrogen and oxygen pressure sensors, electrically connected to the control unit, valves for releasing hydrogen and oxygen from the apparatus fitted on the hydrogen and oxygen lines; each receiver is equipped with a water filling line, a water draining line and a sensor for measuring the amount of water, wherein the water filling and draining lines are fitted with valves, and the sensor for measuring the amount of water and the valves on the water draining lines are electrically connected to the control unit. The invention also relates to a method of operating the apparatus for electrolysis of water under pressure, which involves feeding water and electric current to the electrolysis cell, accumulating hydrogen and oxygen in the receivers, monitoring process parameters, levelling gas pressure and delivering the obtained gases to a consumer, wherein before the beginning of the operating cycle, the hydrogen and oxygen receivers are filled with water in amount of 15% to 30% of the volume of the corresponding receiver, and during operation, the amount of water is controlled, hydrogen and oxygen pressure is recorded and if the pressure drop of hydrogen and oxygen exceeds an allowable value, water is drained from that receiver where gas pressure is higher until pressure in the receivers levels. |
 Electrolysis cell for producing hydrogen and ozone-oxygen mixture / 2507313Electrolysis cell for producing hydrogen and an ozone-oxygen mixture has an anode and cylindrical cathode, arranged coaxially and fastened at the top and bottom by fluoroplastic members, which enable to feed the electrolyte and remove the electrolyte and gas, wherein the cathode serves as the housing and the anode is placed inside the cathode. The anode is made in form of an electroconductive nickel pipe with a glass-carbon coating; the cathode is made of stainless steel with a nickel coating or of nickel; the electrolyte is used as the liquid coolant. The electrolysis cell is connected to pump, a cooler, a container with the working electrolyte, a dispensing pump, a container with an electrolyte concentrator and deionised water, as well as a unit for analysing the quality of the electrolyte. |
| Method of treating abdominal obesity / 2506943 Invention refers to medicine, namely endocrinology and physiotherapy, and may be used for treating abdominal obesity. That is ensured by cryomassage of the problem regions using a cryopackage 300-500 ml at temperature -21- -23°C at stable vibration of 5-10 sec twice for 3-5 minutes every 1-2 minutes. In addition, a 4-6-minute circular douche is taken at temperature 36-37°C for 5-10 sessions. Besides, the patient takes a bubble bath with underwater treatment and ozone feed for 20-25 minutes. The problem regions are also exposed to ultrasound at pulse frequency/pulse duty factor 90-100 Hz/90-100% and intensity 0.7-1.0 Wt/cm2 for 3-4 minutes per one field, 10-15 procedures for 4-10 minutes at frequency 14-180 Hz. |
 Method of determination of maximum water decomposition and device to this end (versions) / 2506349Invention relates to water decomposition. Proposed method comprises water decomposition under exposure to electromagnetic field. Note here that water is decomposed by two resonance loops wherein intensity vectors of first loop electric zero and those of second loop magnetic field as well as second loop electric field intensity vector and first loop magnetic field intensity vector act on water at a time. Note also that magnetic field intensity vectors are aligned and directed perpendicular to electric field vectors. Note that variation in water capacitor permittivity causes fine adjustment of loop to operation in resonance mode which consists in pre-tuning of the loop inductance to resonance magnitudes defined by maximum efficiency of released gases with subsequent use of obtained results in commercial production. Besides, invention relates to hydrogen cell. |
 Charger for hydrogen accumulators based on high passivation metal (aluminium, titanium, magnesium) hydride / 2505739Charger for hydrogen accumulators based on a high passivation metal (aluminium, titanium, magnesium) hydride consists of a stabilised electric current source (1), conductors (2), an electrolysis cell (3) and hydrogen accumulators (4) based on aluminium (titanium or magnesium) hydride (5). The electrolysis cell (3) holds an electrolyte (6) of carbonic acid H2CO3 in distilled water, which completely covers two separate accumulators (4) without external housings with free penetration of the electrolyte (6) into the structure of the accumulator (4) from the metal hydride (5). One accumulator (4) is connected to the cathode (7) and the other accumulator (8) is connected to the anode. On the cover (10) of the charger there is a vertical tube (11) with a valve (12) for releasing excess pressure created by electrolysis products. |
| Method of producing nanopowder zirconium, yttrium and titanium composite oxide / 2509727 Invention can be used in production of dense wear-resistant ceramic and solid electrolytes. The method of producing powder of a zirconium, yttrium and titanium composite oxide involves preparing a starting solution of nitrates, adding an organic acid and a titanium-containing compound into said solution, followed by heat treatment. The organic acid used is glycine in amount of 1.6-2.5 mol per 1 g-atom of the sum of metal cations (Zr+4+Ti+4+Y+3). The titanium-containing compound used is a hydrolysable titanium compound with the ratio Zr+4:Ti+4=(0.99-0.85):(0.15-0.01). The starting solution is further mixed with 30% hydrogen peroxide with the ratio H2O2:Ti+4=(4.7-12):1. The hydrolysable titanium compound used can be titanium tetrabutylate or titanium sulphate or titanium tetrachloride. |
| Method of extracting rare-earth elements from phosphogypsum / 2509726 Invention can be used in chemical industry to extract rare-earth elements from phosphogypsum. The method involves carbonising phosphogypsum to obtain phosphochalk, dissolving said phosphochalk in nitric acid to obtain a product suspension and then separating the insoluble residue - a black concentrate of rare-earth elements - by filtering. The product suspension is divided into two parts, one of which is fed for filtration to separate the insoluble residue - black concentrate, and the second is fed for premixing with nitric acid. The mixing process is carried out for 3-5 minutes with the ratio CaO/HNO3 equal to 0.75-2.25. When dissolving, pH is kept at 2.2-4. |
 Composition based on cerium oxide and zirconium oxide having specific porosity, method of production and use in catalysis / 2509725Invention relates to a composition based on cerium oxide and zirconium oxide having special porosity, which can be used in catalyst systems for treating exhaust gases. The composition is based on cerium oxide and zirconium oxide containing at least 30 wt % cerium oxide which, after calcination at temperature of 900°C for 4 hours, has two types of pore distribution, the diameters of which, for the first type of distribution, lie in the range from 5 nm to 15 nm for a composition having cerium oxide content of 30% to 65%, or from 10 nm to 20 nm for a composition having cerium oxide content higher than 65% and, for the second type of distribution, in the range from 45 nm to 65 nm for a composition having a cerium oxide content of 30% to 65% or from 60 nm to 100 nm for a composition having cerium oxide content higher than 65%. The method of producing the composition includes steps of: forming a first liquid medium containing a zirconium compound, a cerium (III) compound, sulphate ions, an oxidising agent and, optimally, a compound of a rare-earth element other than cerium; bringing the medium into contact with a base, whereby a precipitate is formed; separating and washing the precipitate; suspending the precipitate in water and heat treatment of the obtained medium at temperature of 90°C; and separating and calcining the precipitate. |
| Method of extracting rare-earth elements from wet-process phosphoric acid / 2509169 Invention relates to methods of extracting a concentrate of rare-earth elements from wet-process phosphoric acid, which is obtained in a dihydrate process of treating an apatite concentrate, and can be used in industry. Wet-process phosphoric acid heated to 65-80°C, which contains rare-earth elements and fluorine, aluminium, titanium and iron impurities, is mixed with ammonia in an amount which ensures the molar ratio NH3:P2O5=(0.2-1.0):1. Ammonium fluoride is then added to the acid in amount of 20-30 g/l to obtain a suspension and transfer the main part of rare-earth elements and part of the impurity components into the precipitate. The precipitate of the rare-earth element concentrate is separated from the phosphoric acid solution. |
| Electrolytic method of producing ultrafine gadolinium hexaboride powder / 2507314 Powder is synthesised by electrolysis from a molten medium which includes gadolinium chloride and calcium fluoroborate in a background electrolyte at temperature of 550±10°C in an atmosphere of purified and dried argon. The background electrolyte used is a eutectic mixture of potassium, sodium and caesium chlorides, with the following ratio of components, wt %: gadolinium chloride 3.0-7.0, potassium fluoroborate - 6.0-10.0, eutectic mixture of potassium, sodium and caesium chlorides - the balance. |
 Catalysts of oxidation for diesel engines based on base metals and modified with base metals / 2506996Inventions can be used in field of environment protection. Method of catalyst obtaining includes introduction of base metal in form of ammonium hydroxide or ammonia complex, or in form of organic amine complex, or in form of hydroxide compound into active in redox reactions cubic fluorite CeZrOx material under basic conditions. Catalyst of oxidation includes primary catalytic active metal from group of noble metals, applied on carrier, as well as secondary catalytic active component, which is obtained by ionic exchange between surface of cubic fluorite CeZrOx material and base metal solution and optionally zeolite. Obtained catalysts are used in catalytic device, placing one of them on substrate, around which case is located. Obtained catalysts are also used in method of processing of exhaust gases, passing exhaust gases above them. |
| Luminescent method of determining terbium / 2506569 Invention relates to analytical chemistry and specifically to a method for luminescent determination of terbium. The method involves converting terbium into a luminescent compound with an organic reagent. The reagent used is 1,2-dioxybenzene-3,5-disulphonic acid (DBSA) and ethylenediaminetetraacetic acid (EDTA) is added to the solution of the luminescent complex of terbium with DBSA in ratio Tb:DBSA:EDTA=1:1:1 at pH=12.0-13.0. |
 Method of obtaining mesoporous nanosized cerium dioxide powder (versions) / 2506228Invention relates to chemical industry, to production of nanosized powders of metal oxides for fine-grained ceramics of broad spectrum. Method of obtaining cerium dioxide powder includes stages: obtaining water 0.05M solution of cerium nitrate or cerium acetate, using Ce(NO3)3·6H2O or Ce(CH3COO)3·H2O, obtaining alcohol solution of stabiliser of sol of organic N-containing compound: N,N-dimethyloctylamine, tetraethylammonium hydroxide or monoethanolamine with concentration 0.45-3.30M, 0.37M and 0.016M, obtaining sol in water-organic system by combination of composed solutions, evaporation of water-organic system, formation of gel and thermal processing of gel in the interval of temperatures 95-500°C by step-by-step schedule, with application as sol stabilser of one of the following low-molecular organic N-containing compounds (N): N,N-dimethyloctylamine, tetraethylammonium hydroxide or monoethanolamine in form of alcohol solution with molar ratio N/metal, equal 1-20. |
 Method of obtaining calcium-doped lanthanum manganite / 2505485Calcium-doped lanthanum manganite is obtained by reaction from lanthanum, manganese and calcium oxides by their grinding, first annealing in air at 1350±50°C, cooling to room temperature, re-grinding and pressing obtained material in tablets, its re-annealing in air at 1350±50°C, further annealing in oxygen and cooling to room temperature, with obtaining samples with composition La1-xCaxMn1-zO3, in which selected calcium concentration is 0.05<x<0.22, selected manganese concentration is 0<z≤0.05, first annealing in air is carried out for 12 hours, second re-annealing in air is carried out for 4 hours, annealing in oxygen is carried out at T=650±20°C for 50 hours, and further cooling to room temperature is carried out in air at rate not lower than 10°C/min. |
 Method of processing phosphogypsum / 2504593Method of processing phosphogypsum involves step-by-step agitation sulphuric-acid leaching of rare-earth metals and phosphorus while feeding sulphuric acid to the head step, using the obtained leaching solution of the head step at subsequent leaching steps, separating the undissolved residue from pulp of a tail step and washing with water, treating the leaching solution of the tail step to obtain a mother solution, using the mother solution and the washing solution for leaching. Leaching of the rare-earth metals and phosphorus at the second and subsequent steps is carried out from a mixture of phosphogypsum and the leached pulp from the previous step. Sulphuric acid is fed to the head leaching step in an amount which enables to extract rare-earth metals and phosphorus into the solution at the head step and subsequent steps at pH values at the tail leaching step not higher than pH at the onset of precipitation of rare-earth metal phosphates. The tail step for leaching rare-earth metals and phosphorus is carried out while simultaneously treating the leaching solution by extracting rare-earth metals by sorption with a cationite. The rare-earth metal-saturated cationite is separated from the mother pulp and taken for producing a rare-earth metal concentrate. A portion of the mother solution is pre-purified from phosphorus by precipitation thereof with a basic calcium compound. The obtained phosphorus-containing precipitate is fed for recycling. |
| Electrolytic method of producing ultrafine gadolinium hexaboride powder / 2507314 Powder is synthesised by electrolysis from a molten medium which includes gadolinium chloride and calcium fluoroborate in a background electrolyte at temperature of 550±10°C in an atmosphere of purified and dried argon. The background electrolyte used is a eutectic mixture of potassium, sodium and caesium chlorides, with the following ratio of components, wt %: gadolinium chloride 3.0-7.0, potassium fluoroborate - 6.0-10.0, eutectic mixture of potassium, sodium and caesium chlorides - the balance. |
FIELD: metallurgy.
SUBSTANCE: invention relates to electrolytic methods for obtaining pure dysprosium hexaboride. Anhydrous dysprosium trichloride is used as dysprosium source, potassium fluoroborate is used as boron source, and equimolar mixture of potassium and sodium chlorides is used as base electrolyte. Electrolysis is carried out in potentiostatic mode at temperature of 700±10°C, current densities of 0.1 to 1.0 A/cm2 and electrolysis potentials of 2.5 to 2.8 V relative to glass-carbon quasi-stationary comparison electrode.
EFFECT: obtaining pure ultrafine powder of dysprosium hexaboride; increase in synthesis rate of target product from molten electrolyte and reduction of power consumption.
2 ex
The invention relates to the electrolytic process for the production of clean ultrafine powder hexaboride dysprosium.
The closest one is the way of obtaining hexaboride dysprosium using the electrolysis of fused environments [Samsonov GV Refractory compounds of rare earth metals and nonmetals. M: Publishing house "metallurgy". 1964, p.53-55]. Electrolysis is performed in graphite crucibles, serving simultaneously anode; the cathode is made of graphite and molybdenum. The composition for electrolysis baths include oxides of rare-earth metals and boric anhydride with the addition of fluorides of alkali and alkaline earth metals to reduce the temperature and viscosity baths. Temperature electrolysis mixtures is 950 to 1000 C, the voltage at the bath is 3-15 In the current density of 0.3 to 3.0 a/cm 2 . The composition of the bath to get hexaboride dysprosium: Dy 2 O 3 +2B 2 O 3 +MgO+MgF 2 .
As noted [Samsonov GV Refractory compounds of rare earth metals and nonmetals. M: Publishing house "metallurgy". 1964, p.53-55], the receipt of individual boride phase of dysprosium almost impossible or very difficult. The disadvantages are also high-temperature synthesis and complexity of Department of target product from molten electrolyte because of the low solubility of borates and fluoride contamination by-products, such as borates and graphite.
The objective of the invention is to obtain pure ultrafine powder hexaboride dysprosium, increase the speed of synthesis of target products from molten electrolyte and the reduction of energy consumption.
Summary of the invention consists in that the joint electropitanie dysprosium and of boron chloride melt at the cathode and the subsequent communication between them at the atomic level with formation of ultradisperse powders of hexaboride dysprosium. The process is carried out in a three-electrode quartz cell, where the cathode is used tungsten rod and silver plate; the reference electrode - glass-carbon plate; the anode and at the same time container - glass-carbon crucible (also used Lundby crucible as a container for melting and glass-carbon plate as the anode).
Synthesis of ultrafine powder hexaboride dysprosium conducted by potentiostatic electrolysis of equimolar melt KCl-NaCl containing trichloride of dysprosium and perborate potassium. Potentiostatic electrolysis melt KCl-NaCl-DyCl 3-KBF 4 hold on and silver tungsten electrodes within a-2.5-2.8 glassy carbon In a relatively quasi-stationary reference electrode. Synthesis is carried out in an atmosphere of cleaned and dried argon. Cathode-salt pear subsequently washed off fluoride reduction in potassium fluoride.
As the source of dysprosium use waterless trichloride dysprosium, as the source of boron - perborate potassium, as the background electrolyte - equitylow mixture of potassium chloride and sodium in the following ratio of components, mass%:
chloride dysprosium 6,0-7,0;
perborate potassium 16,0-20,0;
the rest is equimolar mixture of potassium chloride and sodium.
Electrolysis lead in potentiostatic mode at a temperature of 700±10 C, the optimum for a given solvent. Possible the implementation of synthesis and at higher temperatures, however, the increase in temperature leads to the evaporation of the melt, the increase in steam pressure over the melt and the loss of perborate potassium due to its thermal instability.
The choice of components of the electrolytic bath is produced on the basis of thermodynamic analysis and kinetic measurements joint electromedicine dysprosium and of boron chloride melts. From compounds of dysprosium and boron, not containing oxygen, chloride dysprosium and perborate potassium are quite low melting and well-soluble in equimolar melt KCl-NaCl. This background electrolyte selected from the following considerations: voltage decomposition molten mixture KCl-NaCl more voltage decomposition for melts DyCl 3 and KBF 4 , to the same alkali metal chlorides well soluble in water.
Phase composition identified by the method of x-ray phase analysis on the diffractometer DRON-6, the results stated there are only phase DyB 6 .
Example 1. In Lundby the crucible of 60 cm 3 put a mixture of salt mass 41,05 g, containing 2.9 g DyCl 3 (7,0%by weight); 8,15 g KBF 4 (19,7%by weight); Ls 16.80 g KCl (40,8%by weight); 13,20 g NaCl (32,5%by weight). The crucible with salt mixture is placed in a quartz cell, and in the atmosphere of dry argon withstand temperatures of melting system (700±10 C). Upon reaching the operating temperature in the melt down silver cathode. Electrolysis is performed on the silver with the capacity of 2.5 glassy carbon In a relatively quasi-stationary reference electrode (current density 0,80% to 1.0 a/cm 2 ), the duration of electrolysis 110 to 120 minutes Cathode-salt pear washed from fluoride reduction in potassium fluoride. Specific surface powders DyB 6 - 5 to 10 m2 /year
Example 2. In glassy carbon crucible of 40 cm 3 put a mixture of salt by weight of 35.5 g containing 2.24 g DyCl 3 (6,3%by weight); 6,14 d KBF 4 (17,3%by weight); 14,73 g KCl (41,5%by weight); KZT 12.39 g NaCl (34,9%by weight). The crucible with salt mixture is placed in a quartz cell and in the atmosphere of dry argon withstand temperatures of melting system (700±10 C). Upon reaching the operating temperature in the melt down tungsten cathode. Electrolysis is performed on the tungsten when capacity is 2.8 glassy carbon In a relatively quasi-stationary reference electrode (current density 0,80% to 1.0 a/cm 2 ), the duration of electrolysis 110 to 120 minutes Cathode-salt pear washed from fluoride reduction in potassium fluoride. Specific surface powders DyB 6 - 5 to 10 m2 /year
The technical result is the production of clean ultrafine powder hexaboride dysprosium, increase the speed of synthesis of target products from molten electrolyte by reducing temperature synthesis, as well as the reduction of energy consumption.
Electrolytic method get ultra-fine powder hexaboride dysprosium, including synthesis of hexaboride reduction of molten environments, characterized in that the synthesis is carried out at a temperature of 700±10 C, the current densities from 0.1 to 1.0 A/cm 2 and potentials electrolysis from 2.5 to 2.8 In relatively glassy carbon quasi-stationary reference electrode from chloride melt in the atmosphere of cleaned and dried argon, as the source of dysprosium use waterless chloride dysprosium, source of boron - perborate potassium, background electrolyte - equitylow mixture of potassium chloride and sodium in the following ratio , wt.%: chloride dysprosium 6,0-7,0; perborate potassium 16,0-20,0; the rest is equimolar mixture of potassium chloride and sodium.