RU2307817C1 - Method of production of the humic concentrate and the device for its realization - Google Patents

Abstract

FIELD: chemical industry; other industries; methods and devices for production of the humic concentrate.

SUBSTANCE: the invention presents the method of production of the humic concentrate, in compliance to which the water solution of the salts of the humic acids is placed in the electrolysis bath supplied with the cathode and the anode, then apply the electric voltage to the indicates cathode and the anode in such a manner, that the difference of the potentials between them is sufficient for the discharge of the anions of the humic acids salts, but below the value sufficient for the discharge of the hydroxyl ions and the current density on the anode was 5-600 A/m². At that the water steam is passing through the water solution of the humic acids salts, which has been placed in the electrolysis bath, and the target product is produced on the anode surface. The invention also presents the device for production of the humic concentrate, containing the electrolysis bath supplied with the inlet and the outlet for the water solution of the humic acids salts and the anode and the cathode, each of which is connected to the power supply source, differing by that the anode has the cross-section made in the form of the circle and is mounted with the capability of rotation around its own axis and in such a manner that it is partially submerged in each moment of time in the water solution of the humic acids being in the electrolysis bath. At that the anode is supplied with the tool for removal of the target product from its surface, and the indicated electrolysis bath is supplied with the tool for delivery of the water steam in it. The invention allows to simplify the process of the humic concentrate production and to produce simultaneously several humic products.

EFFECT: the invention allows to simplify the process of production of the humic concentrate and to produce simultaneously several humic products.

9 cl, 3 ex, 4 dwg

Description

The invention relates to technologies for the production of humic concentrate and equipment for its production and can be used in the chemical industry.

Humic substances are widely distributed in nature and make up the main, and sometimes predominant, part of coal-bearing caustobiolites, which include oil shale, fossil coals - brown and oxidized stone, and natural gummites, which include soil, peat, as well as river, lake and sea bottom sediments.

The most important part of humic substances is humic acids - high molecular weight organic compounds with a molecular weight of 5 to 100 KD. Since each molecule of humic acids contains several tens of acid groups, they belong to polybasic acids. To isolate them from the natural substances of humites and / or caustobioliths of the coal series, where they are in a water-insoluble state in the form of free acids or their water-insoluble salts, alkaline water extraction is used, usually with an excess of alkaline reagent. For this, potassium, sodium, ammonium hydroxide or organic bases with which humic acids form water-soluble salts are used in practice. The result is a high pH extract containing salts of humic acids and an excess of alkali. Moreover, it is due to the significant negative charge of the anions of humic acids, which leads to the mutual repulsion of macromolecules and their hydration that ensures good solubility and high dispersion of such systems.

However, the scope of application of alkaline extracts of humic acids is very limited, since high pH values make them toxic to microorganisms and plants when used in significant quantities, and a high negative charge worsens their sorption, flocculating and structure-forming properties.

At the same time, free humic acids formed in aqueous systems at pH below 3, due to the fact that their macromolecules do not carry a noticeable negative charge, aggregate, undergo dehydration and fall out of the water systems in the form of flocculent insoluble precipitates. In this case, the specific surface area of their contact with the liquid phase and, as a consequence, the sorption, aggregating, and reactivity are sharply reduced. Therefore, the transitional states of humic acid molecules are of most practical interest, when they are partially dissociated, the pH of such systems ranges from 3.5 to 8.

The valuable properties of humic acids and their derivatives are predetermined by their use in agriculture, animal husbandry, medicine and for solving many environmental problems.

A known method of producing humates, including crushing and grinding of the original natural humites (peat or coal), treatment with extractant (alkali solution or organic base) with mechanical stirring, separation of the solid phase (precipitate) from the liquid phase (humate) and drying of humate [Humic fertilizers, theory and practice of their application. - Kiev: State Publishing House of Agricultural Literature, 1962, part 2, p. 528].

The disadvantages of this method are the low intensity and long duration of the process, as a result of which fulvic acids and low molecular weight fractions of humic acids are mainly extracted from the raw materials. When this occurs, the swelling of the crushed raw materials with the formation of a homogeneous mass, extremely poorly divided into waste in the form of a solid phase and the target product in the form of a liquid phase.

The disadvantages of this method are eliminated in another method, including intensive processing of the feedstock with low-frequency acoustic vibrations and cavitating vibrational jets, which dramatically increases the extraction and yield of humic acids from the feedstock due to its oxidation and increases the biological activity of the obtained humate [RF Patent No. 2042422, IPC B01J 8/16].

However, this method, as described above, is suitable only for obtaining water-soluble salts of humic acids.

In the process of extraction extraction, a large number of finely dispersed particles of the feedstock, clay minerals, and other soluble and easily dispersible impurities pass into the humate solution. So, the ash content of humates is 26-70%. By pretreating the feedstock, for example coal, with mineral acids, for example sulfuric acid, some demineralization is achieved, which reduces the ash content of humates to 12-20%. However, this technique significantly increases the cost and complicates the production of humates. In addition, residues of unreacted alkali are usually present in the resulting extracts.

Known methods for the separation of humic acids from humate solutions by acidifying them to a pH below 3. Thus, for example, a method is known for isolating humic acids from humate solutions, including acid precipitation, filtration and drying [A. S.SSSR No. 169112, IPC С07С 63/33]. When the humate solution is acidified, alkali metal or ammonium cations are replaced by hydrogen ions, and water-insoluble free humic acids precipitate. In this case, irreversible coagulation of colloids and polymerization of humic acid molecules occurs, as a result of which the surface area decreases sharply, reactive centers are blocked and their physicochemical and biological activity decreases. Together with humic acids, a large amount of mineral impurities precipitates. In order to reduce the ash content, the isolated humic acids are subjected to repeated treatment with alkali, filtration, reprecipitation and washing. This method has low efficiency, low productivity, high consumption of reagents (alkali and acid). Its disadvantages also include the difficulty of separating the precipitate — humic acids and the liquid phase — alkaline solution, the high water consumption for washing the precipitated humic acids, and the high energy costs of their subsequent drying. In addition, during repeated processing, humic acids partially lose their natural structure and lose many valuable properties.

There is also known a method for producing humic acids, comprising treating a solution of salts of humic acids with direct electric current in a diaphragm electrolyzer with an ion-exchange cation exchange membrane [A.S. USSR No. 181131, IPC С07С 63/33]. According to the named method, an alkaline extract containing a solution of sodium humate and sodium sulfate is placed in the anode space of a two-chamber electrolyzer separated by an ion-exchange cation exchange membrane. A solution of sodium sulfate is placed in the cathode space. When a sufficient potential difference is established, electrolysis of water proceeds on the electrodes. In this case, the anode space is acidified, and the cathode space is alkalized. As soon as the pH of the anode space drops below three, free water-insoluble humic acid begins to precipitate from the solution, which is then separated from the analyte in other devices. At the same time, a solution of sodium alkali is formed in the cathode space, which is returned to the stage of alkaline extraction of the initial product, since the cation exchange membrane passes only sodium cations into the cathode space and delays humic acid anions. The process can be carried out only in two or more chamber electrolysers, since it is necessary to maintain an acidic environment in the anode space, and an alkaline solution of sodium hydroxide is accumulated in the cathode space during electrolysis. In the single interelectrode space under the indicated conditions, the process of interaction of alkali with humic acid continuously proceeds in the electrolyte with the formation of the initial sodium humate, that is, only the electrolysis of water occurs without the formation of the final product. This method is the closest analogue of the proposed and adopted as a prototype of the invention. The disadvantages of the prototype include high ohmic resistance of the membrane, leading to large energy losses and heating of the electrolyte. In this case, there is a significant specific energy consumption of the process due to the continuous, intensive course of the electrolysis reaction. The need for relatively frequent replacement of the membrane complicates the design of the device, increases operating costs, reduces the reliability of the cell. For the implementation of the method requires special apparatus for separating the resulting humic acid from the analyte. The method allows to obtain directly only one product - water-insoluble humic acids. At the same time, the resulting product - humic acids precipitated - accounts for only part of the analyte volume, which makes their subsequent isolation from it necessary. This is an independent complex problem. Moreover, the water-insoluble humic acids thus obtained have low physicochemical activity due to the low availability of their reactive centers, which does not allow them to be used to solve many agricultural, environmental and industrial problems.

The present invention solves the problem of creating a simple method for producing humic concentrate, with low costs for its implementation, which allows to obtain simultaneously several humic products without any additional stages of isolation of the target products.

The problem is solved in that a method for producing humic concentrate is proposed, by which an aqueous solution of salts of humic acids is placed in an electrolysis bath equipped with a cathode and anode, an electric voltage is applied to said cathode and anode so that the potential difference between them is sufficient to discharge anions salts of humic acids, but lower than the value sufficient for the discharge of hydroxyl ions, and the current density at the anode was 5-600 A / m ² , moreover, through an aqueous solution of salts of humic acids t let water vapor pass and get the target product on the surface of the anode, which is then removed.

To reduce energy consumption, it is advisable to remove the target product from the surface of the anode continuously.

The method is more effective if you use salts of humic acids obtained by extraction with an alkaline reagent from natural humites and caustobiolites of a coal series.

It is most technologically advanced to pass water vapor through an aqueous solution of salts of humic acids in the form of separate jets.

The target product of this method is a humic concentrate, which contains hydrated humic acids, salts of humic acids and mineral components of the starting coal-type humites and caustobiolites chemically associated with humic acids contained in the humic concentrate.

For example, a humic concentrate may have the following composition: from 0.5 to 47.0 wt.% Hydrated humic acids, from 0.5 to 47.0 wt.% Salts of humic acids, from 0.5 to 2.5 wt.% mineral components of the initial coal-type humites and caustobioliths, represented mainly by polymer compounds of iron, aluminum, silicon, chemically associated with the humic acids contained, and water, the maximum amount of which is 90 wt.%.

Obtained by the claimed method, humic concentrate can be divided into the following types:

- type A - humic concentrate containing (on a dry matter basis) 90% or more by weight of hydrated humic acids, having a moisture content of 70-85% and a consistency of a water-insoluble paste-like or raw loose mass with a pH of 3-4;

- type B - humic concentrate containing (by dry matter) from 90 to 60 wt.% hydrated humic acid, having a moisture content of 90-75%, pH 4-6.5 and a jelly-like consistency, soluble in water;

- type C - humic concentrate containing (on dry matter) from 60 to 5 wt.% hydrated humic acid, having a moisture content of 90-80% and a pH of 6.5-10, having a viscous flowing texture, readily soluble in water, not losing water solubility upon drying.

The ash content of the dry part of humic concentrates of all types varies within 5-20 wt.% (Dry matter).

When implementing the inventive method for producing humic concentrate, an aqueous humate solution obtained by alkaline extraction of the feedstock is introduced into a single interelectrode zone (the zone between the anode and cathode), acting on this solution with a steam jet. The steam jet causes cavitation in an aqueous solution of humates, as a result of which internal bonds in them are broken, and the rate of formation of humic salts increases, which accordingly increases the yield of humic salts. The conditions of the electrochemical process are selected in such a way that, at the first moment, the discharge of humic acid anions flows on the anode with the formation of a film of a spatial polymer that has high viscosity and practically fixes the anions of humic acids located on the anode surface. Due to this, the acidification process simultaneously takes place in the film with the transition of humic acid anions to free acids and removal of alkali metal and / or ammonium ions from the anode space and the process of electroosmotic dehydration. The depth of these processes depends, as mentioned above, on the anode potential, the material of the anode, as well as the concentration of humate and time from the moment of formation of the polymer film to its removal. This allows one to obtain a whole gamut of various products in a single process, which differ in the degree of substitution of alkaline cations for hydrogen in polybasic humic acids. As the electrochemical process proceeds, the electrolyte is enriched with alkali and returned to the extraction stage.

To implement the described method, a device is provided.

The closest analogue of the proposed device is a diaphragm electrolyzer with an ion-exchange cation exchange resin for producing humins, which contains an electrolysis bath, a platinum-coated anode and cathode, a cation exchange membrane that separates the electrolysis bath into the anode and cathode zones, a direct current source, pipes for supplying and removing electrolyte [ A.S. USSR No. 181131, IPC С07С 63/33], adopted as a prototype of the invention. This device is unsuitable for the implementation of the described method.

A device for producing a humic concentrate is proposed, comprising an electrolysis bath equipped with an inlet and an outlet for an aqueous solution of humic acid salts and an anode and a cathode, each of which is connected to an electric voltage source, in which the anode has a circular section and is mounted to rotate around its own axis and so that at each moment of time it is partially immersed in an aqueous solution of humic acids in the electrolysis bath, while the anode is equipped with means for removing product from its surface, and the named electrolysis bath is equipped with means for supplying water vapor into it.

The anode can be made in the form of a disk, and on both sides of the anode can be located at least a pair of cathodes having the form of half disks. The device may contain not one, but n anodes mounted in series on a common axis, and 2n cathodes mounted in pairs on both sides of the anode.

The anode may be in the form of a drum, and the cathode in this case may be the body of the electrolysis bath.

Means for removing the target product from the surface of the anode can be made in the form of a scraper installed with the possibility of changing its angle of inclination relative to the surface of the anode. There can be several such scrapers.

The means for supplying water vapor to the bath can be made in the form of a pipeline and is located at the bottom of the electrolysis bath.

A device having n disks as anodes and 2n half disks as cathodes is shown in Figs. 1 and 2, where: 1 - an electrolysis bath, 2 - a discharge pipe, 3 - a supply pipe for a solution of salts of humic acids, 4 - drain pipe, 5 - shaft, 6, 7 - bearings, 8 - coupling, 9 - drive, 10 - conductive means, 11 - means for removing the target product from the surface of the anode, 12 - anode, 13 - constant voltage source, 14 - cathode, 15 - frame, 16 - initial solution of salts of humic acids and coal suspension, 17 - nozzle for supplying steam, 18 - drain trough.

In figure 1, 2, the electrolysis bath is made in the form of a horizontally mounted gutter. On the end walls of the bath there are inlet 3 and outlet 2 nozzles designed for inlet and outlet of an aqueous solution of salts of humic acids. A solution of salts of humic acids fills the entire volume of the bath 1, at the bottom of which there is also a drain pipe 4. Anodes 12 are made in the form of disks, each end surface of which forms an electrolysis zone with each opposite wall of the cathodes 14. In this case, the anodes 12 are interconnected by a common shaft 5 mounted for rotation around its longitudinal axis in bearings 6 and 7, made, for example, of a dielectric material. At one end of the shaft 5, a coupling 8 is installed, made of a dielectric material and connecting the shaft 5 to the drive 9. At the other end of the shaft 5 there is a current-carrying means 10 connected to the positive potential of the DC voltage source 13. All cathodes 14 are connected to the negative potential of the DC voltage source 13.

The device is equipped with means 11 for removing the target product from the end surfaces of the anodes 12, which contains scrapers mounted on both sides of the end surfaces of each anode 12 with the possibility of changing the angle of inclination relative to these end surfaces.

Bearings 6 and 7, clutch 8 and means 11 with scrapers provide electrical isolation of each anode 12 and shaft 5 from the bath 1 and cathodes 14. The bath is mounted on the frame 15. Cavitating jets of water vapor are injected into the cathode space through a system of steam nozzles 17.

This device for the electrochemical production of a new humic concentrate works as follows.

The initial aqueous solution of salts of humic acids and coal suspension 16 through the pipe 3 is fed into the bath 1. By means of the drive 9, the shaft 5 and, accordingly, the anodes 12 are driven from the DC voltage source 13 to the anodes 12 and the potential is fed to the cathodes 14 - negative, thereby establishing a potential difference sufficient to discharge anions of humic acids, but lower than the potential for the discharge of hydroxyl ions.

In each interelectrode gap, an electrolysis of a solution of a salt of humic acids occurs. The mechanism for isolating humic concentrate at each anode 12 is similar to that described above, i.e. anions of humic acids move to the anode 12 and, discharging on it, settle on its surface. During the slow rotation of each anode 12, a layer of humic concentrate deposited on its end surfaces is removed from the humic acid salt solution.

The tool 11 removes the layer of formed humic concentrate from the end surfaces of the disks 12 and directs the resulting product for storage or packaging through the drain trough 18.

The process proceeds continuously, that is, the rotating electrodes 12 continuously remove the target product from the electrolyte.

Passing through the bath 1 solution of salts of humic acids and a suspension of coal is processed using a system of nozzles 17 with cavitating jets of steam. And the depleted electrolyte is discharged from the bath 1 through the outlet pipe 2. An alkaline solution leaves the bath 1, it is sent to the reprocessing of the feedstock as an extractant.

During operation of the inventive device, mineral impurities contained in the initial solution precipitate, therefore, the precipitate formed from the bath 1 is periodically withdrawn through the nozzle 4.

A device for producing a humic concentrate from natural humites and caustobioliths of a coal series containing hydrated humic acids, salts of humic acids and mineral components of the feedstock chemically associated with the humic acids contained in the concentrate, as described in FIGS. 3 and 4, where: 1 electrolysis bath - cathode, 2 inlet pipe, 3 - nozzles for steam supply, 4 - outlet pipe, 5, 6 - bearings, 7 - shaft, 8 - clearance, 9 - anode drum, 10 - drive, 11 - coupling, 12 - conductive means, 13 - frame, 14 - yellow about, 15 - constant voltage source, 16 - drain pipe, 17 - means for removing the target product from the surface of the anode

The electrolysis bath - cathode 1 (Fig. 3) is made in the form of a cylindrical trough with end walls, on which the inlet and outlet pipes 2 and 4 are located. It is possible to arrange the inlet and outlet pipes on the cylindrical surface of the bath 1 opposite one another (not shown). At the bottom of the bath 1 there is a drain pipe 16 to remove the precipitate formed in the electrolyte during electrolysis and which is insoluble impurities of the initial salt of humic acids. In the bath, a drum-anode 9 is mounted coaxially with a gap 8 on the shaft 7. The left and right ends of the shaft 7 are supported by bearings 5 and 6 (made, for example, of dielectric material), which make it possible to rotate the shaft 7. At one end, the shaft 7 is connected via a coupling 11 (made, for example, of dielectric material) with a drive 10, the speed of which can be adjusted. At the other end of the shaft 7, a current-carrying means 12 is installed, connected to the positive pole of the constant voltage source 15. The means 12 provides current supply to the anode drum 9 through the rotating shaft 7. The bath 1 mounted on the frame 13 is connected to the negative pole of the constant voltage source 15 and grounded.

The tool 17 (figure 4) for removing the target product from the cylindrical surface of the drum-anode 9 is installed on the bath 1. The device 17 contains a scraper installed with the ability to change the angle of contact with the cylindrical surface of the drum-anode 9. The resulting concentrate is discharged into the groove 14.

The system of steam nozzles 3 provides treatment with cavitating jets of steam of coal suspension and a solution of salts of humic acids in an alkaline electrolyte to isolate humic acids.

Means 5, 6, 11 (figure 3) and 14, 17 (figure 4) provide electrical isolation of the drum-anode 9 from the bath cathode 1.

This device operates as follows.

The initial aqueous solution of a salt of humic acids, for example, sodium or potassium humate, obtained by treating the feedstock with an alkaline reagent solution during treatment with cavitating steam jets, is fed through the pipe 4 to the cathode bath 1. The humate solution can be supplied both along bath 1 and across ( figure 3 is not shown).

After filling the bath 1 with an aqueous solution of the salt of humic acids with the drive 10 by means of the coupling 11 and the shaft 7, the drum-anode 9 is rotated.

From the DC source 15 through the means 12 and the shaft 7, a positive potential is supplied to the drum 9, and a negative potential is supplied to the bath 1. In the gap 8 between the cylindrical part of the cathode bath 1 and the anode drum 9, the process of electrolysis of a solution of humic acid salts proceeds with the formation of a layer of humic concentrate on the cylindrical surface of the anode drum 9. The current density and rotation speed of the drum-anode 9 are set based on the need to obtain a type A, B or C humic concentrate. For example, to obtain a type A humic concentrate, the current density is set in the range 300-600 A / m ² , the concentration of the initial humate solution should make up 4-8 wt.%, the period of electrode cleaning should be 3-10 seconds. To obtain a type B humic concentrate, the current density is set in the range of 100-400 A / m ² , the concentration of the initial humate solution should be 6-9 wt.%, The electrode cleaning period should be 2-5 seconds. To obtain a type C humic concentrate, the current density is set in the range of 50-200 A / m ² , the concentration of the initial humate solution should be 8-10 wt.%, The electrode cleaning period should be 1-3 seconds.

When the drum-anode 9 is rotated, the humic concentrate released in the electrolysis zone (in the gap 8) on a part of the cylindrical surface of the drum-anode 9 is removed from the solution and then removed from this surface with a scraper 17 and sent for storage or packaging through the drain trough 14.

In the steady state of the device, the solution of salts of humic acids and carbon suspension is continuously fed through the pipe 2 into the cathode bath 1 and continuously withdrawn from it. In the solution of humic acid salts that passed through the electrolysis zone (gap 8), the concentration of the organic component of the solution decreases and the pH rises. The solution withdrawn from the cathode bath is sent for reuse as an extractant for processing the feedstock. Depending on the pH of this solution, an alkaline reagent is additionally introduced into it.

In the process of electrolysis of a solution of salts of humic acids, carbon and clay components of the feedstock precipitate from it in the form of a precipitate, which, as they accumulate, are removed from the cathode bath 1 through a drain pipe 16.

Example 1

An aqueous solution of potassium humate and a suspension of oxidized coal with a concentration of 10% are fed into an electrolyzer with anodes of stainless disks. The speed of rotation of the anodes is 10 rpm, the current density at the anode is 400 A / m ² . In the process of electrolysis on the anodes, a type B humic concentrate is formed, containing humic acids - 14%, potassium humate - 5%, bound mineral components - 1%, water - 80% and having a pH of 6.0. The consistency of the humic concentrate is gel-like, the resulting product is soluble in water.

The resulting humic concentrate is characterized by:

1) elemental composition C = 61.8%, H = 2.9%, N = 1.6%, O = 33.1% and S = 0.6%;

2) the total acidity (meq / g) = 4.0 ± 0.3, the content of OH-groups (MEq / g) = 2.2 ± 0.2;

3) the composition of the mineral part in mg / g dry matter: Al = 3.50, Ca = 15.15, Cu = 0.25, Mg = 2.22, Mn = 0.33, Sr = 0.21, Zn = 0.64, Fe = 10.9, Na = 20.23, Si = 0.08;

4) a gel chromatogram with an almost single peak centered at 25,000 daltons, with at least 60% of the molecular weight ranging from 22,000-27,000 daltons;

5) an NMR spectrum in which there are three well separated bands corresponding to alkyl, aromatic and carboxylic carbons, and there are also no absorptions at 50-100 ppm related to carbons bound to OH groups of carbohydrate fragments.

Example 2

An aqueous solution of sodium humate and a suspension of grade D coal with a concentration of 12% are fed into a cell with a stainless anode. The rotational speed of the anode is set equal to 15 r / s, the current density at the anode is 100 A / m ² .

During electrolysis, a type C humic concentrate is formed on the anode, containing hydrated humic acids 1.7%, sodium humates 9%, bound mineral components 0.8%, water 89.5%, having a pH of 7.5. The resulting product has a viscous fluid consistency that is readily soluble in water. Other characteristics of the obtained humic concentrate are basically similar to those indicated in example 1.

Example 3

An electrolytic cell with an anode, which is a drum made of stainless steel, is supplied with an aqueous solution of potassium humate and a suspension of peat with a concentration of 9%. The speed of the drum is 4 rpm, the current density of 500 A / m ² . During electrolysis, a type A humic concentrate is formed on the anode, containing hydrated humic acids 25%, potassium humate 1.5%, bound mineral components 2.5%, water 71%. The product has a pH of 4.5, a pasty consistency and is soluble in water.

Other characteristics of the obtained humic concentrate are basically similar to those indicated in example 1.

Claims (9)

1. A method of producing a humic concentrate, in which an aqueous solution of salts of humic acids is placed in an electrolysis bath equipped with a cathode and anode, an electric voltage is applied to said cathode and anode so that the potential difference between them is sufficient for electrolysis of the said salts of humic acids to occur of the target product, which is then removed, characterized in that an electric voltage is applied to the said cathode and anode so that the potential difference between them it is sufficient for the discharge of anions of salts of humic acids, but lower than the value sufficient for the discharge of hydroxyl ions, and the current density at the anode was 5-600 A / m ² , and water vapor is passed through an aqueous solution of salts of humic acids placed in an electrolysis bath, and the target product is obtained on the surface of the anode. 2. The method according to claim 1, characterized in that the target product is removed from the surface of the anode. 3. The method according to claim 1, characterized in that the salts of humic acids are obtained by extraction with an alkaline reagent from natural humites and caustobiolites of a coal series. 4. The method according to claim 1, characterized in that the water vapor is passed through an aqueous solution of salts of humic acids in the form of separate jets. 5. The method according to claim 1, characterized in that the target product is a humic concentrate containing hydrated humic acids, salts of humic acids and mineral components of the starting coal-type humites and caustobiolites chemically associated with humic acids contained in the humic concentrate. 6. A device for producing a humic concentrate containing an electrolysis bath equipped with an inlet and an outlet for an aqueous solution of salts of humic acids and an anode and a cathode, each of which is connected to an electric voltage source, characterized in that the anode has a circular cross-section and is installed with the possibility rotation around its own axis and so that at each moment of time it is partially immersed in an aqueous solution of humic acids in the electrolysis bath, while the anode is equipped with means for removing of the product from its surface, and the named electrolysis bath is equipped with means for supplying water vapor into it. 7. The device according to claim 6, characterized in that the anode is made in the form of a disk and is installed between two cathodes made in the form of half disks and immersed in an aqueous solution of humic acids in the electrolysis bath. 8. The device according to claim 6, characterized in that the anode is made in the form of a cylindrical drum, and the cathode is the body of the electrolysis bath. 9. The device according to claim 6, characterized in that the means for removing the target product from the surface of the anode is made in the form of a scraper installed with the possibility of changing the angle of its inclination relative to the surface of the anode.

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