Method of production of the ferric formiate (ii) in the water medium

FIELD: chemical industry; methods of production of the salts of iron and the organic acids.

SUBSTANCE: the invention is pertaining to the field of chemical industry, in particular, to the method of production of the salts of the metals of the organic acids, in particular, to production of the salt of the ferrous iron and the formic acid. The method is realized by the direct interaction of the formic acid water solution with the iron and/or its alloys and the ferric oxidesFe2O3 and Fe3O4 in the bead crumber of the vertical type along the whole its height with the steel shell, with the heat supply and equipped with the mechanical stirrer and the backflow condenser-refrigerator. The apparatus is loaded with 23-46 % water solution of the formic acid as the liquid phase in the mass ratio with the glass beads as 1:1.25 and then introduce the oxide - Fe3O4 orFe2O3 in amount of 0.27-0.49 or 0.48-0.64 mole/kg of the liquid phase accordingly, and besides in amount of 18 % from the mass of the liquid phase they add the powder of the reduced iron and-or the crushed cast iron, and-or the crushed steel chips in any mass ratios. Switch on the mechanical stirring and heating and keep the temperature in the reaction zone within the limits of 55-75°С. The process is terminated, when practically the whole loaded oxide is completely consumed. The suspension of the salt is separated from the non-reacted iron, its alloy and the beads and dilute with the water up to the contents of the formic acid within the limits of 1-2 mole/kg. The gained mass at stirring action is slowly heated up to temperature of 85-95°С, controlling transformation of the solid phase into the solution. The gained solution is subjected to the hot filtration, evaporation, cooling and separation of the salt crystals. The filtrate and the earlier the gained distillate are sent back to the repeated process. The technical result of the invention is simplification of the technology of the production process with utilization of the accessible raw.

EFFECT: the invention ensures simplification of the technology of the production process with utilization of the accessible raw.

10 ex

 

The invention relates to a technology for ferrous iron salt and formic acid and can be used in various fields of industrial and laboratory chemicals for the production of composite materials and analytical control.

A method of obtaining acetate iron (II) interaction of the metal with acetic acid in the presence of an oxidant, which is conducted in two stages, with the first stage as the oxidant used air mode bubbling under intensive mechanical mixing iron powder with acetic acid with the addition of acetic anhydride at a temperature of 17-25°s, the second - salt of iron (III) (the product of the first stage) with an increased content of acetic anhydride and 35-40°With a nitrogen atmosphere until complete consumption of the entire accumulated in the first phase of salt of iron (III). (A positive decision on the application No. 2004108557/04 (009021) from 03.08.05).

The disadvantages of this method is the following.

1. Using both the first and the second stage is practically anhydrous environments, provide additional input into the reaction mixture of acetic anhydride as a dehydrating component and stimulating supplements.

2. The conduct of the second stage of the process in a nitrogen atmosphere, which is predetermined by the instability of acetate of iron (II) to oxygen in the air, even if the bulk of such solinoide in suspension.

3. The main source of the cation of the salt is a metal, which, although widely used for practical purposes, to organic compounds does not apply.

4. This method has many individual characteristics that are predetermined by the anion of the salt of iron. Therefore the replacement of the anion of acetic acid on anion other carboxylic acids will lead to very significant changes in the range and sequence of operations as in the modes of occurrence of each of them.

Closest to the claimed is a method of producing acetate iron (II), according to which the interaction of the metal with acetic acid is carried out in the presence of iron oxides Fe2O3or Fe3O4molecular iodine and acetic anhydride in a bead mill with high-speed mechanical stirrer at 80°with periodic sampling of the solid phase of acetate of iron (II) by filtering and returning the filtrate to repeat the process.

The disadvantages of this process are high requirements to maintain a virtually anhydrous medium, the process of acquisition and allocation of salt in the atmosphere of nitrogen, and high rigidity range and sequence of operations and their mode of occurrence nature of the obtained salt of the product. However, in this method, the main sources of the cation of the salt is the e iron, and iron oxides, which are related to natural resources.

The objective of the proposed solutions is to get from a similar iron-containing raw materials formate, iron (II), by conducting the process in an environment that is easily transformed into a favorable liquid phase recrystallization of the product during its separation and purification.

This object is achieved in that the liquid phase to the interaction of iron and its oxide is used 23-46%aqueous solution of formic acid, which is dosed in a mass ratio of glass beads of 1:1.25 and the oxide of Fe3O4or Fe2About3enter in the quantity of 0.27-0,49 or of 0.48-0.64 mol/kg liquid phase after loading the last iron take the form of a steel shell on the entire side surface of the reactor with the addition of powder recovered iron (or pieces of broken grey cast iron brass steel shavings with the largest linear size of 5 mm in any ratio between a total amount of 18% by weight of the liquid phase, and the process is carried out at 55-75°to practically complete spending just loaded iron oxide, after which the slurry of the reaction mixture is separated from the beads and commensurate with it size pieces of unreacted iron alloy, by adding water lead content of formic acid in suspension up to 1-2 mol/kg, after which poluchenno the mass while stirring slowly heated to 85-95° With and subjected to hot filtration to separate the impurities of fine iron, unreacted oxide and unreacted carbon from iron and steel, the filtrate is partially evaporated and left for natural cooling and crystallization of salt is separated from the saturated formate, iron (II) an aqueous solution of formic acid by simple filtering.

Characteristics of the raw materials used.

The reactive iron in THE 6-09-2227-81

Steel 3 on CMTU 1-84-67

Steel 45 GOST 1050-74

The grey cast iron grey 15-32 according to GOST 1412-70

The iron oxides:

magnetite according to GOST 26475-85

hematite according to GOST 4173-77

minium on THE 113-00-38-160-96

γoxide according to GOST 3540-82

Formic acid according to GOST 5848-73

The process of the inventive method the following. In ball mill vertical type with inserted steel shell over the entire height of the hull, with a reflux-condenser, a device for separating the reaction mixture from the glass beads and commensurate with him on the size of the pieces of iron and steel in the drain pipe, the supply of external heat and maintain the temperature at a specified level and a sampler for monitoring the progress of the process enter the calculated amount containing the acid liquid phase, beads (if he is not in the mill), iron oxide powder and restored is elesa, pieces of the fraction of broken cast iron or broken chips. Include mechanical stirring, heating and deduce the temperature at the preset level. Stabilize the temperature. Continue stirring at this temperature and maintain control over the expenditure of iron oxide and salt accumulation. As soon as the iron oxide is consumed almost completely, stirring is stopped and the reaction mixture (suspension of formate, iron (II) in a saturated them the solution of unreacted acid in the solid phase remains oxide, and fine particles of crushed iron and steel, and also carbon from the reacted iron) is separated from the beads and large particles of iron and steel and by additional input of water is transformed into a suspension with a content of formic acid 1-2 mol/kg, the Latter is heated to 85-95°with stirring, to move the bulk of formate, iron (II) in the solution, and then sent to hot filtration to separate not passed into a solution of the solid phase. The filtrate is partially evaporated and left for natural cooling and crystallization of salt. Solid salt is filtered and dried without any restrictions of access of air. The filtrate return to the stage of recrystallization.

Example 1

In ball mill vertical type stainless steel (inner diameter 80 mm,height 250 mm, steel shell over the entire height)equipped with high-speed (1440 rpm) paddle stirrer with thick blades ˜5 mm, external reflux-condenser, a loading opening, a pocket for a thermocouple, a sampler and a drain pipe that allows you to separate the suspension of the reaction mixture from the beads and large particles of iron, iron or steel, load 625 g of glass beads with a particle diameter of 1.5 to 2.5 mm, 500 g of the liquid phase in the form of a 46%aqueous formic acid, 55,65 g of oxide of Fe3O4and 90 g powdered restored iron. Include mechanical mixing and heating a liquid bath, a display for 27 min temperature 60°With, stabilize at this level and lead the process to practically complete spending just loaded iron oxide. The salt content of iron in suspension at this point $ 1.69 mol/kg Duration of 105 minutes Control lead method of sampling the suspension during the process, and definition of contents of formate, iron (II) and iron oxide.

After a specified time, stop stirring, allow 1-2 minutes for sedimentation of heavy particles of iron, iron and steel, after which the slurry with suspended light solid phase is separated from the beads and other particles of large size, merging through the mesh in the drain pipe with a cell size of 0.5×0.5 mm Because the process was repeated several times and the dead zone of the reactor filled with the reaction mass, appreciable loss of suspension for the reason indicated in the second and subsequent repetitions virtually none.

The suspension is collected in a tank reactor with a stirrer and a supply of external heat for heating. The amount of this capacity should provide the necessary dilution of the suspension with water. In this example, the capacity of the received 570 g of suspension. Add 970 g of distilled water and get the suspension with the content of formic acid in it 2 mol/kg. Include mechanical mixing and heat and bring the temperature up to 95°C. it took 87 minutes While the bulk of the solid phase of the suspension turned into a solution. The last is directed to hot filtration and separated from the remaining solids. They were 0,87, the Filtrate is subjected to partial evaporation from the selection of the distillate in the form of a solution of formic acid, which return to repeat the process of making a liquid phase process. The distillate obtained 1090, the Remaining cube is left for natural cooling for 12 hours. During this time the bulk of formate, iron (II) crystallizes in the form of easily filterable solid phase. The latter is separated and dried. Finally, 127,4 g of salt. 23 g calculated on the anhydrous salt remained in the filtrate (results of analysis). The latter accumulate, then subjected to partially is from evaporation, natural cooling and additional quantities of formate, iron (II).

Example No. 2-10

Used the reaction apparatus, the loading of the beads and the liquid phase, the sequence of operations during boot process, the separation and purification of the finished product is similar to that described in example 1. Different concentration of acid in the liquid phase, the nature and dosage of the iron oxide and the iron, the temperature holding stationary phase of the process, and the concentration of formic acid in the solution on the recrystallization, the temperature of complete dissolution of the main mass of the suspension of the solid phase during recrystallization. The results obtained are summarized in table

Load characteristics, the process and the selection of productExample No.
2345678910
The concentration of formic acid in the liquid phase233737373741414141
Iron oxide:&x0200A;
NatureFe3O4Fe3O4Fe3O4Fe3O4Fe2O3hematiteFe2O3hematiteFe2O3miniumFe2About3γoxideFe3O4
download, g55,5056,7749,8431,3247,3150,1338,3151,1375,07
Reduced iron, g00102090090900
The fraction of broken cast iron, g90040350450015
The fraction of broken steel shavings, g09040350450075
Temperature holding stationary phase process, °616365555860 756368
Duration, min: output at operating temperature232537282632393128
the whole process257111841539710517411187
The salt content in the final reaction mixture, in mol/kg1,581,751,541,031,641,651,631,662,07
The amount of suspension of the reaction mixture, g571577558542555568547569pasta*
The addition of water in suspension, g0627700925750585540685
The concentration of acid after dilution, mol/kg1,011,751,831,981,651,881,921,73
The duration of heating and Rast is orenia, min921048668115131165123
The temperature of complete dissolution, °9593918595959594
The mass is filtered of impurities, g2,620,570,980,590,411,142,370,53
Selected distillate, g2317048081025853676692797
The duration of the cooling and crystallization, h1413151214121516
Obtaining in g: hard dry salt132,1to 129.2115,473,8123,1126,4120,6the 122.7164,9
formate iron (II) in a saturated solution of filtrate15,314,710,87,1141 a 12.718,115,8
*During cooling to 35°With almost no stir the mass with captive beads and unreacted oxide, iron and steel; the destruction by repeated leaching of salts dilute solution of formic acid in combination with mechanical effects.

The positive effect of the proposed solution is as follows.

1. The main supplier of cations for the target salts are iron oxides, i.e. natural connection.

2. As iron can be used waste iron and steel, which practically does not affect the quality of the obtained after recrystallization of the product.

3. Temperature of the process is quite soft and easily achievable by many real options.

4. Instrumentation process is simple, does not require the use of the apparatus under pressure, the gas flow. Possible joint arrangement of the reactor site filtration and recrystallization.

5. The process can be repeated many times in the same reaction apparatus with any of the time intervals between the individual performances. The accumulation of harmful for the process products are not marked. This eliminates the need for frequent emptying from the beads, and Bytca iron, iron and steel, the more thorough washing, and allows you to keep the dead zone filled with the reaction mixture and to avoid significant losses for this reason.

6. Unreacted in one pass raw materials can be easily returned to re-process that enables the use of excess reagents in order to control the speed, duration other characteristics of the process.

The method of producing formate, iron (II) by direct interaction containing the acid liquid phase with iron or iron-containing materials and oxides of Fe2About3and Fe3About4in a bead mill with a reflux-condenser, high-speed mechanical stirrer and glass beads as peritoneum agent, characterized in that the liquid phase to interact with iron and its oxide is used 23-46%aqueous solution of formic acid, the dosed mass ratio of glass beads of 1:1.25 and the oxide of Fe2About3or Fe3O4enter in the quantity of 0.27-0,49 or of 0.48-0.64 mol/kg liquid phase after the last iron take the form of a steel shell on the entire side surface of the reactor with the addition of powder recovered iron (or pieces of broken grey cast iron and (or) broken steel shavings with the largest linear size of 5 mm in the yubom ratio between a total amount of 18% by weight of the liquid phase, and the process is carried out at 55-75°to practically complete spending just loaded iron oxide, after which the slurry of the reaction mixture is separated from the beads and comparable to it in size pieces of unreacted iron alloy, by adding water lead content of formic acid in suspension up to 1-2 mol/kg, after which the resulting mass under stirring slowly heated to 85-95°and subjected to hot filtration for separation of fine iron, unreacted oxide and carbon from iron-containing alloys, the filtrate is partially evaporated and left for natural cooling and crystallization of salt, separated from a saturated solution of formate, iron (II) in aqueous solution of formic acid by simple filtering.



 

Same patents:

FIELD: production of salts of organic acids, salt of ferrous iron and formic acid in particular.

SUBSTANCE: proposed method consists in loading preliminarily prepared aqueous solution of formic acid at concentration of 4.5-10 mole/kg into reactor provided with bladed mixer, back-flow condenser-cooler and air bubbler. Then, powder of reduced iron and/or broken iron and/or steel chips at any mass ratio in total amount of 20.0-30.6% of mass of liquid phase and stimulating iodine additive in the amount of 0.016-0.164 mole/kg of liquid phase are introduced. Reactor may be provided with steel or cast iron ferrule over entire height. At mechanical mixing, consumption of air for bubbling is maintained between 1.2 and 2.0 l/(min·kg of liquid phase). Working temperature range is 45-65°C which is maintained by external cooling. Process is discontinued when content of iron salts (II) in reaction mixture reaches 1.8-2.0 mole/kg. Suspension of salt in liquid phase is separated from unreacted iron particles and is filtered afterwards. Filtrate is directed for repeated process and salt sediment is re-crystallized from aqueous solution saturated with iron formate by formic acid at concentration of 1-2 mole/kg at heating to temperature of 95°C followed by natural cooling.

EFFECT: enhanced efficiency.

1 tbl, 9 ex

FIELD: chemical industry; methods of production of the ferric formiate (III).

SUBSTANCE: the invention is pertaining to the field of chemical industry, in particular, to the method of production of the ferric formiate (III). The invention is dealt with the organic salts of the transition metals, in particular to production of the salt of the ferric iron and the formic acid. The method is realized by the direct interaction of the regenerated iron powder with the formic acid at presence of the molecular iodine and oxygen of the air as the oxidizing agents. The process is running in the medium of dimethylformamide as the dissolvent for preparation of the necessary liquid phase with the concentrations of the formic acid and iodine of 4.5-10 and 0.03-0.11 mole/kg accordingly. The mass ratio of the liquid phase and the powder of the regenerated iron is 3:1. The process starts at the room temperature and is conducted in the conditions of the forced cooling at the temperature of 50-80°С at the rate of the air consumption for the bubbling of 0.6-1.2 l\minute per 1 kg of the liquid phase. The process is terminated at accumulation of the ferric formiate (III) in the suspension up to 1-1.2 mole/kg. The suspension is separated from the particles of the non-reacted iron and then filtered. The filtrate is recycled to the repeated process, and the ferric formiate (III) (salt) is dried and either is used as required, or additionally is purified by the recrystallization. The technical result of the invention is simplification of the method with improvement of the economic indicators and the increased purity of the final product.

EFFECT: the invention ensures simplification of the method with improvement of the economic indicators and the increased purity of the final product.

8 ex

FIELD: inorganic chemistry, chemical technology.

SUBSTANCE: invention relates to the improved method for preparing metal complex compounds, in particular, to iron complex (chelate) as its concentrated solution. Method is carried out by interaction of iron salt in an aqueous medium with a chelate-forming agent wherein N,N,N',N'-ethylenediaminetetraacetic acid is used as a chelating agent and citric acid that are added simultaneously or successively. The process is carried out at temperature 70-90°C and in the process of mixing iron salt or after mixing with chelate-forming agent an aqueous solution of ammonia or ammonium citrate is added for providing pH value of the end product 2.0-2.3. The complex-forming agent can comprise succinic acid additionally. Method provides preparing iron chelate as a concentrated solution with the content of iron 60-100 g/l. Invention can be used in agriculture for root and leaf feeding of plants.

EFFECT: improved preparing method.

4 cl, 6 ex

FIELD: inorganic syntheses.

SUBSTANCE: method consists in that iron powder is oxidized in acetic acid/acetic anhydride (4%) medium with air oxygen bubbled through the medium, while maintaining iron-to-acetic acid molar ratio 5:1 and temperature 17-25°C. Reaction mixture is thoroughly stirred with blade stirrer at speed of rotation 720-1440 rpm until reaction mixture accumulates 0.75-0.96 mol/kg ferric salt. Thereafter, air is replaced by nitrogen and 4% acetic anhydride based on initially charged acetic acid is added, temperature is raised to 35-40°C, and iron is oxidized with ferric salt until full consumption of the latter. Resulting snow-white ferrous acetate suspension is separated from unreacted iron, filtered off, and dried. All above operations are carried out under a nitrogen atmosphere. Filtrate, which is saturated ferric acetate solution in acetic acid/acetic anhydride mixture, is recycled to reactor to be reprocessed or it is used according another destination.

EFFECT: simplified technology and improved economical characteristics of process due to use of inexpensive oxidant.

2 ex

FIELD: inorganic syntheses.

SUBSTANCE: ferric acetate is prepared by interaction of metallic iron with acetic acid in presence of an oxidant. Process is carried out at ambient temperature in acetic acid/acetic anhydride medium (weight ratio 5:1) under nitrogen atmosphere. Molar ratio acetic acid/iron/basic ferric acetate is maintained the following: 10:8:1. Reaction mixture is thoroughly stirred with high-speed blade stirrer or shaken at shaking frequency 2 Hz. When consumption of basic ferric acetate is completed, suspension of ferrous acetate is separated by filtration from unreacted iron powder. Precipitate is dried and filtrate returned into the process.

EFFECT: simplified process due to selection of optimal oxidant.

2 ex

FIELD: industrial inorganic synthesis.

SUBSTANCE: implementation of the method comprises contacting iron in the form of iron powder or iron sidewall adjacent to a body with glacial acetic acid and air oxygen at 17-25°C and vigorous stirring effected by high-speed blade-type mechanical stirrer. Initial acetic acid-to-iron molar ratio is (224÷274):100. Acetic anhydride additive is preferably introduced in amount of 2% based on the initial concentration of acetic acid. When concentration of ferric salt in the mixture reaches 2.70-3.51 mole/kg, stirring is stopped and heavy unreacted iron particles are allowed to settle/ Major mass of product suspension is filtered off and thus obtained basic ferric acetate precipitate is dried. Filtrate, which is saturated acetic acid solution of basic ferric acetate, is returned into reactor to be reprocessed. Yield of desired product achieves 99.2-99.3%.

EFFECT: simplified process and improved economical efficiency due to utilization of inexpensive raw material and accessible oxidant.

2 ex

FIELD: chemical technology.

SUBSTANCE: invention relates to a method for preparing acetic acid salts, in particular, anhydrous ferrous (II) acetate. Method for preparing anhydrous ferrous (II) acetate involves interaction of metallic iron with acetic acid in the presence of oxidizing agents of ferric oxide Fe2O3 or Fe3O4 and molecular iodine in the mole ratio acetic acid : acetic anhydride : iron oxide = 100:(6-20):(2-2.5), respectively, and in the mole ratio iron oxide : iodine = 100:6.3. The process is carried out at temperature 80°C in the beaded mill of vertical type with high-rotation blade mixer and reflux condenser in the mass ratio of glass beads and liquid phase in the charge = 1:1. The process is carried out with periodic taking off samples of the end product solid phase by filtering and the following recover filtrate and feeding with acetic acid and iron oxide. For compensation of components loss of liquid phase in filtering there are recovered into reactor to the repeated process that is carried out for four times at a time. All procedures of the basic process and filtration are carried out in nitrogen medium. Preferably, method involves using hematite, γ-oxide, iron minium, magnetite or Fe3O4 x 4 H2O as the iron oxide source. Invention provides possibility for preparing anhydrous ferrous (II) acetate and simplifying method due to excluding the evaporation stage in isolation of salt.

EFFECT: improved preparing method.

3 cl, 2 tbl, 8 ex

FIELD: inorganic synthesis.

SUBSTANCE: invention provides heterometallic neodymium (III) and iron (III) malate having formula I:

appropriate for synthesis of mixed oxides with perovskite structure, which are used as catalysts in oxidative catalysis of unsaturated acyclic hydrocarbons and as materials used in microwave frequency technology and in computer memory materials. Preparation consists in electrolysis of concentrated aqueous solution of neodymium (III) chloride and malic acid at 1:3 ratio in presence of pyridine with pressed reduced iron anode and inert cathode at anode current density 1 A/cm2, followed by separating precipitate and washing it with organic solvent before drying.

EFFECT: enlarged assortment of oxidation catalysts.

2 cl, 1 dwg, 2 tbl

FIELD: chemical industry, in particular two-component heterogeneous immobilized catalyst for ethylene polymerization.

SUBSTANCE: claimed catalyst includes alumina, mixture of transition metal complexes with nitrogen skeleton ligands (e.g., iron chloride bis-(imino)pyridil complex and nickel bromide bis-(imino)acetonaphthyl complex). According the first embodiment catalyst is prepared by application of homogeneous mixture of transition metal complexes onto substrate. iron chloride bis-(imino)pyridil complex and nickel bromide bis-(imino)acetonaphthyl complex (or vise versa) are alternately applied onto substrate. According the third embodiment catalyst is obtained by mixing of complexes individually applied onto substrate. Method for polyethylene producing by using catalyst of present invention also is disclosed.

EFFECT: catalyst for producing polyethylene with various molecular weights, including short chain branches, from single ethylene as starting material.

7 cl, 5 tbl, 27 ex

The invention relates to petrochemistry, specifically to the production dialkyldithiocarbamate accelerators of vulcanization of rubbers

FIELD: production of salts of organic acids, salt of ferrous iron and formic acid in particular.

SUBSTANCE: proposed method consists in loading preliminarily prepared aqueous solution of formic acid at concentration of 4.5-10 mole/kg into reactor provided with bladed mixer, back-flow condenser-cooler and air bubbler. Then, powder of reduced iron and/or broken iron and/or steel chips at any mass ratio in total amount of 20.0-30.6% of mass of liquid phase and stimulating iodine additive in the amount of 0.016-0.164 mole/kg of liquid phase are introduced. Reactor may be provided with steel or cast iron ferrule over entire height. At mechanical mixing, consumption of air for bubbling is maintained between 1.2 and 2.0 l/(min·kg of liquid phase). Working temperature range is 45-65°C which is maintained by external cooling. Process is discontinued when content of iron salts (II) in reaction mixture reaches 1.8-2.0 mole/kg. Suspension of salt in liquid phase is separated from unreacted iron particles and is filtered afterwards. Filtrate is directed for repeated process and salt sediment is re-crystallized from aqueous solution saturated with iron formate by formic acid at concentration of 1-2 mole/kg at heating to temperature of 95°C followed by natural cooling.

EFFECT: enhanced efficiency.

1 tbl, 9 ex

FIELD: chemical industry; methods of production of the ferric formiate (III).

SUBSTANCE: the invention is pertaining to the field of chemical industry, in particular, to the method of production of the ferric formiate (III). The invention is dealt with the organic salts of the transition metals, in particular to production of the salt of the ferric iron and the formic acid. The method is realized by the direct interaction of the regenerated iron powder with the formic acid at presence of the molecular iodine and oxygen of the air as the oxidizing agents. The process is running in the medium of dimethylformamide as the dissolvent for preparation of the necessary liquid phase with the concentrations of the formic acid and iodine of 4.5-10 and 0.03-0.11 mole/kg accordingly. The mass ratio of the liquid phase and the powder of the regenerated iron is 3:1. The process starts at the room temperature and is conducted in the conditions of the forced cooling at the temperature of 50-80°С at the rate of the air consumption for the bubbling of 0.6-1.2 l\minute per 1 kg of the liquid phase. The process is terminated at accumulation of the ferric formiate (III) in the suspension up to 1-1.2 mole/kg. The suspension is separated from the particles of the non-reacted iron and then filtered. The filtrate is recycled to the repeated process, and the ferric formiate (III) (salt) is dried and either is used as required, or additionally is purified by the recrystallization. The technical result of the invention is simplification of the method with improvement of the economic indicators and the increased purity of the final product.

EFFECT: the invention ensures simplification of the method with improvement of the economic indicators and the increased purity of the final product.

8 ex

FIELD: anti-conglomeration agents.

SUBSTANCE: invention relates to loose product based on potassium formate, which contains 0.1 to 1% water and 0.5-5% water-soluble conglomeration-preventing agent, such as potassium carbonate or potassium hydroxide, which possesses affinity for water and corresponds to equilibrium humidity below equilibrium 15% relative humidity (22°C) for potassium formate.

EFFECT: provided modifying and conglomeration preventing agents for potassium formate to allow it to achieve looseness under practical storage and processing conditions.

3 cl, 4 tbl, 4 ex

The invention relates to an improved method of separation of polyols, such as neopentyl glycol or atrial, and sodium formate or calcium, comprising adding to the mixture of the partial organic solvent, in which the polyhydric alcohol is dissolved, the crystallization of sodium formate or calcium, Department of formate sodium or calcium from the solution of a polyhydric alcohol in an organic solvent, for example, by filtration, recycling of organic solvent, cooling the solution and crystallization of a polyhydric alcohol, and as the organic solvent used solvent aromatic series such as toluene, after adding to the mixture of the partial substances organic solvent, the resulting mixture is heated to boiling point and produce at this temperature simultaneously: dehydration of the mixture by distillation with water recirculation separated from water, organic solvent, crystallization dissolved in an organic solvent, sodium formate or calcium and dissolution in an organic solvent, a polyhydric alcohol

The invention relates to a method for the simultaneous receipt of pentaerythritol and sodium formate used in the chemical, leather and paint and other industries

The invention relates to a technology for technical formate sodium from aqueous solution technical Chlorella, which is a waste product of chloroform
The invention relates to the production of sodium formiate and obtaining thus purified chloroform
The invention relates to chemical technology and is designed to produce chloroform, used as raw material in the production of perchloromethane (Halocarbon 22 halon 21), and to obtain sodium formate used as a preservative roughage (silage, wet hay) in agriculture

FIELD: anti-conglomeration agents.

SUBSTANCE: invention relates to loose product based on potassium formate, which contains 0.1 to 1% water and 0.5-5% water-soluble conglomeration-preventing agent, such as potassium carbonate or potassium hydroxide, which possesses affinity for water and corresponds to equilibrium humidity below equilibrium 15% relative humidity (22°C) for potassium formate.

EFFECT: provided modifying and conglomeration preventing agents for potassium formate to allow it to achieve looseness under practical storage and processing conditions.

3 cl, 4 tbl, 4 ex

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