RU2538898C1 - Method of obtaining product for air regeneration - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: method of obtaining product for air regeneration consists in interaction of hydrogen peroxide solution, satbilised with magnesium sulfate, and sodium and potassium hydroxides with further application of obtained alkaline solution of hydrogen peroxide on indifferent porous fibrous matrix and dehydration of liquid phase on matrix. Halogenides of alkali or alkali earth metals are introduced into alkali solution of hydrogen peroxide, stabilised with magnesium sulfate, after addition of sodium and potassium hydroxide, with molar ratio potassium hydroxide/alkali metal halogenide equal 13-115. As halogenides of alkali or alkali earth metals used are lithium, sodium, potassium, magnesium, calcium chlorides or their mixture.

EFFECT: product possesses improved exploitation characteristics when applied in systems of human life support.

2 cl, 1 dwg, 1 tbl, 9 ex

Description

The invention relates to methods for producing products for air regeneration, used both in collective air regeneration systems and in individual breathing apparatus using chemically bound oxygen (human life support systems).

A known method of obtaining a product for air regeneration [RF patent No. 2456046, IPC A62D 9/00, 2012], which consists in the interaction of a solution of hydrogen peroxide and potassium hydroxide, followed by applying the resulting alkaline solution of hydrogen peroxide on an indifferent porous fiber matrix and dehydration of the liquid phase on the matrix. Before the addition of potassium hydroxide, the necessary amount of magnesium sulfate and sodium hydroxide are successively introduced into the initial solution of hydrogen peroxide. Magnesium sulfate acts as a stabilizer, slowing down the decomposition of peroxide products of the obtained alkaline solution of hydrogen peroxide. The molar ratio of the starting components should be the following values: H ₂ O ₂ / MgSO ₄ = 492-650; H ₂ O ₂ / NaOH = 8.0-58.0; H ₂ O ₂ / KOH = 1.60-1.88. In this case, potassium hydroxide is introduced into the solution at least 30 minutes after the introduction of sodium hydroxide. To reduce the rate of decomposition of hydrogen peroxide, the addition of sodium and potassium hydroxides is carried out so that the temperature of the liquid phase does not exceed 50 ° C. Dehydration of the indifferent porous fibrous matrix impregnated with the initial solution is carried out either by drying in vacuum at 30-150 ° C or in a stream of dried decarbonized air or inert gas acting as a drying agent at atmospheric pressure at a temperature of 60-220 ° C.

However, the product for air regeneration obtained in a known manner is characterized by insufficiently efficient use of the resource during its operation in air regeneration systems.

This is due to the following factors. Firstly, when receiving a product for air regeneration due to the high viscosity of an alkaline solution of hydrogen peroxide, it is quite difficult to evenly apply it on an indifferent porous fiber matrix, which leads to an inhomogeneous distribution of the active components of the product for air regeneration (alkali metal peroxide compounds) over the matrix surface . This, in turn, leads to uneven development of the product for air regeneration during its operation in life support systems, which negatively affects such important operational characteristics as the time of the protective action, the degree of exhaustion of oxygen and carbon dioxide. Due to the uneven distribution of active centers (peroxide compounds of alkali metals) on the matrix, there is a chance that regenerated air can pass along the path of least resistance past active centers, i.e. the product for air regeneration will not fulfill its intended purpose, which is fraught with a threat to human health and even human life.

Secondly, the product for air regeneration obtained in a known manner is not characterized by a sufficiently high speed of the process of chemisorption of carbon dioxide when it is used in air regeneration systems. This disadvantage is especially pronounced during the operation of human life support systems equipped with the specified product for air regeneration under high loads, requiring the rapid removal of a significant amount of carbon dioxide from the gas phase. The low absorption rates of carbon dioxide lead to its accumulation in the regenerated gas, which can have a very negative impact not only on the physical condition of the user by the LMS systems (life support system), but also pose a serious danger to his life.

The insufficiently high rate of carbon dioxide absorption is due to the following. The mechanism of the process of chemical air regeneration by products based on potassium superoxide is the interaction of potassium superoxide with water vapor, which leads to the formation of oxygen and potassium hydroxide, which then interacts with hydrated carbon dioxide to form potassium carbonate and water:

2KO ₂ + H ₂ O → 2KOH + 1,5O ₂ + Q

CO ₂ + H ₂ O = H ₂ CO ₃

2KOH + CO ₂ → K ₂ CO ₃ + H ₂ O + Q

This process can be represented by the sequence of the following stages:

- external diffusion of reagents through the gas (boundary) layer to the surface of the granules of the product for air regeneration;

- internal diffusion (in the pores);

- the interaction of potassium superoxide with water vapor, as a result of which oxygen is released and the formation of a surface film of the liquid phase occurs;

- diffusion and dissolution of the sorbate in an aqueous solution of the surface film with the ionization of carbon dioxide molecules;

- chemical interaction of ionized carbon dioxide molecules with K ⁺ ions present in the surface water film;

- advancement of the reaction zone deep into the granules of the product for air regeneration due to the dissolution of the mass of potassium superoxide;

- the formation of a layer of potassium carbonate.

The potassium carbonate layer formed at the last stage complicates the further dissolution of carbon dioxide and its diffusion to the active reaction zone of the product for air regeneration.

In addition, the attenuation of the air regeneration process, as follows from the above equations, at the final stage is also facilitated by the dehydration of the reacting system due to the entrainment of water by the stream of gas to be purified and oxygen released.

The objective of the invention is to obtain a product for the regeneration of air uniformly deposited on a porous indifferent matrix.

The technical result is to improve the operational properties of the product for air regeneration when it is used in air regeneration systems.

The technical result is achieved by the fact that in the method of obtaining a product for air regeneration, comprising mixing stabilized with magnesium sulfate hydrogen peroxide with sodium and potassium hydroxides, applying the resulting alkaline solution of hydrogen peroxide on an indifferent porous fiber matrix and subsequent dehydration of the liquid phase on the matrix, stabilized with magnesium sulfate a solution of hydrogen peroxide after the addition of sodium and potassium hydroxides, alkali and / or alkaline-earth metal halides are introduced at m a potassium hydroxide / alkali metal and / or alkaline earth metal halide (KOH / MeHal) ratio of 13-115. In this case, the application of the obtained alkaline solution of hydrogen peroxide on an indifferent porous fibrous matrix should be carried out no less than 10-15 minutes after the introduction of alkali or alkaline-earth metal halides.

Preferably, lithium, sodium, potassium, magnesium, calcium chlorides or a mixture thereof are used as alkali or alkaline earth metal halides.

The introduction of alkali / alkaline-earth halides into the alkaline hydrogen peroxide solution and the mixing sequence of the components makes it possible to obtain a product for air regeneration with improved operational properties (protective action time, oxygen and carbon dioxide exhaust rate, high kinetics of carbon dioxide chemisorption).

This is due to the following factors. Firstly, when alkali or alkaline-earth metal halides are introduced into an alkaline hydrogen peroxide solution, the viscosity of the prepared solution decreases, which contributes to a more uniform deposition of it on an indifferent matrix (applying the obtained alkaline hydrogen peroxide solution on an indifferent porous matrix should be carried out in at least 10 15 minutes after the introduction of alkali or alkaline-earth metal halides, i.e. when ions introduced into the liquid phase, which provide a decrease in the solution viscosity, are available exactly evenly distributed throughout the volume of the liquid phase. The addition of all of these components and the resulting exposure of the alkaline solution of hydrogen peroxide within the specified time is carried out with vigorous mechanical stirring of the liquid phase). As a result of this, the active centers at which chemical processes occur (alkali metal peroxide compounds) are also more evenly distributed on the matrix, which, in turn, leads to a more complete development of the product for air regeneration during its operation. As a result of this, such important operational characteristics of life support systems as the time of the protective action, the degree of development of oxygen and carbon dioxide are increased.

Secondly, the presence in the surface film of an aqueous alkaline solution formed on the surface of the product for the regeneration of air, alkali metal or alkaline-earth halides also reduces its viscosity, which leads to an increase in diffusion processes in the liquid phase and an increase in the solubility of reacting substances in the aqueous surface film solution. Due to this, the kinetics of the process of chemisorption of carbon dioxide by the product for air regeneration increases. In addition, the presence in the surface film of an aqueous solution of an alkaline solution on the surface of the granules of the product for air regeneration and in the pores of the matrix of halide components (ions), which are hygroscopic additives and are able to retain water molecules, protects the reaction zone from excessive dehydration. As a result, the degree of carbon dioxide production of the product for air regeneration increases.

A method of obtaining a product for air regeneration is as follows. An initial alkaline solution of hydrogen peroxide is prepared, for which magnesium sulfate, sodium hydroxide and potassium hydroxide are successively introduced into a solution of hydrogen peroxide with a concentration of 50 to 85% by weight with vigorous stirring. After the addition of sodium and potassium hydroxides, alkali or alkaline earth metal halides are introduced into the liquid phase. The molar ratio of the starting components should be as follows: hydrogen peroxide / magnesium sulfate (H ₂ O ₂ / MgSO ₄ ) = 492-650; hydrogen peroxide / sodium hydroxide (H ₂ O ₂ / NaOH) = 8.0-58.0; hydrogen peroxide / potassium hydroxide (H ₂ O ₂ / KOH) = 1.60-1.88; potassium hydroxide / alkali metal / alkaline earth metal halide (KOH / MeHal _x ) = 13-115. To reduce the kinetics of the decomposition of hydrogen peroxide, the addition of sodium and potassium hydroxides is carried out so that the temperature of the liquid phase does not exceed 50 ° C. Thus obtained alkaline solution of hydrogen peroxide not less than 10-15 minutes after the introduction of alkali or alkaline earth metal halides is uniformly applied to an indifferent porous fiber matrix of the required geometric dimensions by any known method (for example, impregnation, aerosol spraying, etc.) and is carried out dehydration. Dehydration of the porous fiber matrix impregnated with the initial solution is carried out either by drying in vacuum at 30-150 ° C or in a stream of dried decarbonized air or inert gas acting as a drying agent at atmospheric pressure at a temperature of 60-220 ° C. Decarbonization of the drying agent is carried out using any carbon dioxide scavenger. Dehydration of the drying agent can be carried out by passing it through regenerated water absorbers such as zeolite, silica gel, etc. At the end of dehydration, the finished product for air regeneration is placed in a sealed container.

In examples 1-9 shows data on obtaining the claimed method of a product for air regeneration.

Example 1

To 9.9 L of an aqueous 50% hydrogen peroxide solution, 42.4 g of magnesium sulfate (H ₂ O ₂ / MgSO ₄ = 492) and 133.4 g of 90% sodium hydroxide (H ₂ O ₂ / NaOH = 58) are added with continuous stirring. ) About 30 minutes after the uniform distribution of all the introduced components throughout the volume of the liquid phase, 6.22 kg of solid 90% potassium hydroxide was added (H ₂ O ₂ / KOH = 1.74). KOH is added so that the temperature of the liquid phase does not exceed 50 ° C. Then, 64.8 g of potassium chloride (KOH / MeHal = 115) is introduced into the liquid phase and it is exposed for 10 minutes with continuous stirring. Next, the resulting alkaline solution of hydrogen peroxide, as the technological need for, during the production shift (8 hours) is uniformly applied to the indifferent porous fiber matrix of the required geometric dimensions by aerosol spraying and dehydration is carried out. The dehydration of the liquid phase on the matrix is carried out by drying in vacuum at 30-90 ° C and a residual pressure of 0.95 atm. 6.87 kg of product is obtained containing 74.57% KO ₂ , 15.49% KOH, 1.17% Na ₂ O ₂ , 0.38% NaOH, 4.18% H ₂ O, 0.81% KCl, 0.54% MgSO ₄ and 2.86% g of the matrix.

Example 2

To 9.55 L of an aqueous 50% hydrogen peroxide solution, 40.2 g of magnesium sulfate (H ₂ O ₂ / MgSO ₄ = 525) and 356 g of 90% sodium hydroxide (H ₂ O ₂ / NaOH = 21) are added with continuous stirring. About 30 minutes after the uniform distribution of all the introduced components by volume of the liquid phase, 6.22 kg of solid 90% potassium hydroxide (H ₂ O ₂ / KOH = 1.68) was added to the resulting solution. KOH is added so that the temperature of the liquid phase does not exceed 50 ° C. Then, 71.3 g of sodium chloride (KOH / MeHal = 82) is introduced into the liquid phase and its exposure is carried out for 11 minutes with continuous stirring. Next, the obtained alkaline solution of hydrogen peroxide, as the process needs during the production shift (8 hours), is uniformly applied by impregnation to the indifferent porous fiber matrix of the required geometric dimensions and dehydration is carried out. The dehydration of the liquid phase on the matrix is carried out by drying in vacuum at 30-90 ° C and a residual pressure of 0.95 atm. 7.34 kg of product is obtained containing 69.57% KO ₂ , 16.92% KOH, 2.98% Na ₂ O ₂ , 0.73% NaOH, 5.24% H ₂ O, 1.06% NaCl, 0.51% MgSO ₄ and 2.99% g of the matrix.

Example 3

To 9.77 L of an aqueous 50% hydrogen peroxide solution, 37.6 g of magnesium sulfate (H ₂ O ₂ / MgSO ₄ = 551) and 534 g of 90% sodium hydroxide (H ₂ O ₂ / NaOH = 14.3) are added with continuous stirring. ) About 30 minutes after the uniform distribution of all introduced components throughout the volume of the liquid phase, 6.22 kg of solid 90% potassium hydroxide (H ₂ O ₂ / KOH = 1.72) was added to the resulting solution. KOH is added so that the temperature of the liquid phase does not exceed 50 ° C. Then, 229.3 g of magnesium chloride (KOH / MeHal = 41) was introduced into the liquid phase and exposed for 12 minutes with continuous stirring. Next, the obtained alkaline solution of hydrogen peroxide, as the process needs during the production shift (8 hours), is uniformly applied to the indifferent porous fiber matrix of the required geometric dimensions by aerosol spraying and dehydration is carried out. The dehydration of the liquid phase on the matrix is carried out by drying in a stream of dried and decarbonized air at a temperature of 200 ° C. 7.86 kg of product is obtained containing 66.33% KO ₂ , 16.37% KOH, 4.22% Na ₂ O ₂ , 1.65% NaOH, 4.74% H ₂ O, 3.21% MgCl ₂ 0.47% MgSO ₄ and 3.01% g of the matrix.

Example 4

To 4.85 L of an aqueous 85% hydrogen peroxide solution, 33 g of magnesium sulfate (H ₂ O ₂ / MgSO ₄ = 602) and 712 g of 90% sodium hydroxide (H ₂ O ₂ / NaOH = 10.34) are added with continuous stirring. About 30 minutes after the uniform distribution of all the introduced components by volume of the liquid phase, 6.22 kg of solid 90% potassium hydroxide (H ₂ O ₂ / KOH = 1.66) was added to the resulting solution. KOH is added so that the temperature of the liquid phase does not exceed 50 ° C. Then, 317.1 g of calcium chloride (KOH / MeHal = 35) was introduced into the liquid phase and exposed for 12 minutes with continuous stirring. Next, the obtained alkaline solution of hydrogen peroxide, as the process needs during the production shift (8 hours), is uniformly applied to the indifferent porous fiber matrix of the required geometric dimensions by aerosol spraying and dehydration is carried out. The dehydration of the liquid phase on the matrix is carried out by drying in a stream of dried and decarbonized air at a temperature of 150 ° C. 8.07 kg of product is obtained containing 68.83% KO ₂ , 12.14% KOH, 6.06% Na ₂ O ₂ , 1.51% NaOH, 4.21% H ₂ O, 3.96% CaCl ₂ , 0.39% MgSO ₄ and 2.90% of the matrix.

Example 5

To 9.55 L of an aqueous 50% hydrogen peroxide solution, 40.2 g of magnesium sulfate (H ₂ O ₂ / MgSO ₄ = 525) and 356 g of 90% sodium hydroxide (H ₂ O ₂ / NaOH = 21) are added with continuous stirring. About 30 minutes after the uniform distribution of all the introduced components by volume of the liquid phase, 6.22 kg of solid 90% potassium hydroxide (H ₂ O ₂ / KOH = 1.68) was added to the resulting solution. KOH is added so that the temperature of the liquid phase does not exceed 50 ° C. Then 75.9 g of lithium chloride (KOH / MeHal = 56) are introduced into the liquid phase and its exposure is carried out for 11 minutes with continuous stirring. Next, the obtained alkaline solution of hydrogen peroxide, as the process needs during the production shift (8 hours), is uniformly applied by impregnation to the indifferent porous fiber matrix of the required geometric dimensions and dehydration is carried out. The dehydration of the liquid phase on the matrix is carried out by drying in vacuum at 30-90 ° C and a residual pressure of 0.95 atm. 7.39 kg of product is obtained containing 69.61% KO ₂ , 16.93% KOH, 2.98% Na ₂ O ₂ , 0.74% NaOH, 5.12% H ₂ O, 1.11% LiCl, 0.52% MgSO ₄ and 2.99% g of the matrix.

Example 6

To 9.1 L of an aqueous 50% hydrogen peroxide solution, 29.6 g of magnesium sulfate (H ₂ O ₂ / MgSO ₄ = 650) and 890 g of 90% sodium hydroxide (H ₂ O ₂ / NaOH = 8.0) are added with continuous stirring. ) About 30 minutes after the uniform distribution of all the introduced components by volume of the liquid phase, 6.22 kg of solid 90% potassium hydroxide (H ₂ O ₂ / KOH = 1.60) was added to the resulting solution. KOH is added so that the temperature of the liquid phase does not exceed 50 ° C. Then 137.5 g of potassium chloride and 158 g of sodium chloride (KOH / MeHal = 22) are introduced into the liquid phase and it is exposed for 13 minutes with continuous stirring. Next, the obtained alkaline solution of hydrogen peroxide, as the process needs during the production shift (8 hours), is uniformly applied by impregnation to the indifferent porous fiber matrix of the required geometric dimensions and dehydration is carried out. The dehydration of the liquid phase on the matrix is carried out by drying in vacuum at 30-50 ° C and a residual pressure of 0.95 atm. 8.28 kg of product are obtained containing 57.56% KO ₂ , 20.34% KOH, 6.31% Na ₂ O ₂ , 3.14% NaOH, 5.94% H ₂ O, 1.77% KCl, 1.98% NaCl, 0.29% MgSO ₄ and a 2.67% matrix.

Example 7

To 10.68 L of an aqueous 50% hydrogen peroxide solution, 37.6 g of magnesium sulfate (H ₂ O ₂ / MgSO ₄ = 600) and 1.11 kg of 90% sodium hydroxide (H ₂ O ₂ / NaOH = 15) are added with continuous stirring. , 0). About 30 minutes after the uniform distribution of all the introduced components by volume of the liquid phase, 6.22 kg of solid 90% potassium hydroxide (H ₂ O ₂ / KOH = 1.88) was added to the resulting solution. KOH is added so that the temperature of the liquid phase does not exceed 50 ° C. Then, 151.1 g of lithium chloride and 222 g of calcium chloride (KOH / MeHal = 18) are introduced into the liquid phase and it is exposed for 13 minutes with continuous stirring. Next, the obtained alkaline solution of hydrogen peroxide, as the process needs during the production shift (8 hours), is uniformly applied to the indifferent porous fiber matrix of the required geometric dimensions by aerosol spraying and dehydration is carried out. The dehydration of the liquid phase on the matrix is carried out by drying in a stream of dried and decarbonized air at a temperature of 220 ° C. 8.50 kg of a product are obtained containing 60.52% KO ₂ , 15.68% KOH, 8.45% Na ₂ O ₂ , 2.44% NaOH, 5.42% H ₂ O, 1.82% LiCl, 2.67% CaCl ₂ , 0.41% MgSO ₄ and a 2.59% matrix.

Example 8

To 4.85 L of an aqueous 85% hydrogen peroxide solution, 33 g of magnesium sulfate (H ₂ O ₂ / MgSO ₄ = 602) and 712 g of 90% sodium hydroxide (H ₂ O ₂ / NaOH = 10.34) are added with continuous stirring. About 30 minutes after the uniform distribution of all the introduced components by volume of the liquid phase, 6.22 kg of solid 90% potassium hydroxide (H ₂ O ₂ / KOH = 1.66) was added to the resulting solution. KOH is added so that the temperature of the liquid phase does not exceed 50 ° C. Then, 199.3 g of lithium chloride, 117 g of sodium chloride and 111 g of calcium chloride (KOH / MeHal = 13) are introduced into the liquid phase and it is exposed for 15 minutes with continuous stirring. Next, the obtained alkaline solution of hydrogen peroxide, as the process needs during the production shift (8 hours), is uniformly applied to the indifferent porous fiber matrix of the required geometric dimensions by aerosol spraying and dehydration is carried out. The dehydration of the liquid phase on the matrix is carried out by drying in a stream of dried and decarbonized air at a temperature of 220 ° C. 8.14 kg of product is obtained containing 67.70% KO ₂ , 12.19% KOH, 6.01% Na ₂ O ₂ , 1.56% NaOH, 4.14% H ₂ O, 5.38% MeHal, 0.28% MgSO ₄ and 2.74% of the matrix.

Example 9

To 4.85 L of an aqueous 85% hydrogen peroxide solution, 33 g of magnesium sulfate (H ₂ O ₂ / MgSO ₄ = 602) and 712 g of 90% sodium hydroxide (H ₂ O ₂ / NaOH = 10.34) are added with continuous stirring. About 30 minutes after the uniform distribution of all the introduced components by volume of the liquid phase, 6.22 kg of solid 90% potassium hydroxide (H ₂ O ₂ / KOH = 1.66) was added to the resulting solution. KOH is added so that the temperature of the liquid phase does not exceed 50 ° C. Then, 66.6 g of calcium chloride and 61.75 magnesium chloride (KOH / MeHal = 80) are introduced into the liquid phase and exposed for 15 minutes with continuous stirring. Further, the obtained alkaline solution of hydrogen peroxide, as the process needs during the production shift, is uniformly applied to the indifferent porous matrix of the required geometric dimensions, immersing the matrix in the initial solution, and dehydration is carried out. The dehydration of the liquid phase on the matrix is carried out by drying in a stream of dried and decarbonized air at a temperature of 150 ° C. 7.83 kg of product is obtained containing 70.94% KO ₂ , 12.19% KOH, 6.12% Na ₂ O ₂ , 1.54% NaOH, 4.17% H ₂ O, 1.73% MeCl ₂ , 0.39% MgSO ₄ and 2.92% of the matrix.

The product for air regeneration, obtained by the present method, was tested in a cartridge of an insulating breathing apparatus on the installation "Artificial lungs" (IL) under the following conditions:

- pulmonary ventilation 30.0 ± 1 l / min

- volumetric supply of carbon dioxide 1.0 ± 0.03 l / min

- humidity of the gas-air mixture,% 96-98

- oxygen consumption (exhaust from the installation) 1.14 ± 0.05 l / min

- respiratory rate 20 ± 0.5 min ^-1

- ambient temperature 20-25 ° C.

Volumes of oxygen and carbon dioxide are indicated at 10 ° C and 101.3 kPa, pulmonary ventilation at 37 ° C and 101.3 kPa. For comparison with the products obtained by the claimed method (examples 1-9), under the same conditions, a product was tested for air regeneration, made according to the method described in example 5 of RF patent No. 2456046 (example 10). All products for air regeneration had the form of plates of the same size and density. The time of the protective action was determined as the time from the start of the regenerative product to the moment when the concentration of CO ₂ in the flow of the air-gas mixture on the line of "inhalation" of the installation "IL" reached 3%. The test results are presented in the table and in the drawing. The drawing shows the kinetic absorption curves of carbon dioxide by various products for air regeneration. Curve 1 in the drawing characterizes the kinetics of CO ₂ absorption by the product for air regeneration obtained by the method described in example 5 of RF patent No. 2456046. Curve 2 characterizes the kinetics of CO ₂ absorption by the air regeneration product of the invention. Since for all products for air regeneration manufactured according to examples 1-9, the difference in the amount of absorbed carbon dioxide per unit time does not exceed 6%, the drawing (curve 2) shows the change in the average value of this parameter.

Table Test results of products for air regeneration at the installation "Artificial lungs". Composition of the product Product weight, g Protective action time, s The amount of absorbed CO ₂ , l The amount of allocated O ₂ , l The degree of homogeneity of the product for air regeneration,% According to example 1 181 913 15.22 24,99 81 According to example 2 180 934 15,57 25.81 84 For example 3 181 945 15.75 27.89 86 For example 4 179 966 16.10 28.54 88 For example 5 180 957 15.95 28.43 88 For example 6 181 929 15.48 26.12 89 For example 7 180 924 15.40 25.26 89 For example 8 181 909 15.15 24.86 88 For example 9 180 936 15.60 26.03 85 Product according to the patent of the Russian Federation No. 2456046 181 893 14.90 24.46 78

The degree of homogeneity of the product for air regeneration was determined as the identity of the chemical composition of the segments of the product for air regeneration, determined by the methods of physico-chemical analysis.

As can be seen from the presented table and graphic data, the product for air regeneration obtained according to the invention is more uniformly deposited on the porous indifferent matrix due to the reduction due to the presence of alkali and alkaline-earth metal halides, the viscosity of the alkaline hydrogen peroxide solution. For this reason, for such important operational characteristics as the time of the protective action and the degree of exhaustion of oxygen and carbon dioxide, the product for air regeneration obtained according to the invention exceeds that of the product according to RF patent No. 2408403. In addition, it has higher kinetic parameters of the process of absorption of carbon dioxide in comparison with the product according to the patent of the Russian Federation No. 2408403.

The above positive aspects associated with the process of chemisorption of carbon dioxide are due to the presence in the product for air regeneration of alkali or alkaline earth metal halides and the method of their introduction into the product, which leads to a decrease in the viscosity of the surface film of an aqueous solution formed on the surface of the product for air regeneration . This, in turn, leads to an increase in diffusion processes in the liquid phase and an increase in the solubility of the reacting substances in an aqueous solution of the surface film, i.e. increases the kinetics of the process of chemisorption of carbon dioxide product for air regeneration.

Claims (2)

1. A method of obtaining a product for air regeneration, comprising mixing stabilized with magnesium sulfate hydrogen peroxide with sodium and potassium hydroxides, applying the resulting alkaline solution of hydrogen peroxide on an indifferent porous fiber matrix and subsequent dehydration of the liquid phase on the matrix, characterized in that in a solution stabilized with magnesium sulfate hydrogen peroxide after the addition of sodium and potassium hydroxides, alkali and / or alkaline earth metal halides are introduced at a molar ratio of potassium oxide / alkali and / or alkaline earth metal halide (KOH / MeHal) equal to 13-115, while applying the obtained alkaline solution of hydrogen peroxide on an indifferent porous fiber matrix is carried out not less than 10-15 minutes after the introduction of alkali or alkaline earth metal halides . 2. The method according to claim 1, characterized in that as the alkali metal or alkaline earth metal halides, lithium, sodium, potassium, magnesium, calcium chlorides or a mixture thereof are used.

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