Carbon-containing pumice, preparation method and application thereof

FIELD: chemistry.

SUBSTANCE: pumice used for water surface cleaning from hydrocarbons and having carbon content in the range from 5 to 15% wt is claimed. The method of pumice preparation with carbon content in the range from 5 to 15% wt, particle size from 3 to 8 mm and density in the range 500 - 570 kg/m3 includes removal of the materials filling the pores (undersize particles, basalt, magnetite and volcanic ash) with water jet, following hydrocarbon adsorption with pumice and pumice flame treatment for hydrocarbons burning.

EFFECT: efficiency enhancing of pumice application.

7 cl, 1 tbl

 

The present invention relates to pesam, to a method for their production and to their use.

Pumice is a glassy volcanic rock light shade. She has quite exceptional properties, due to internal private and external open cells. It is very porous, therefore, has a low density, and in appearance similar to a sponge.

Pumice is resistant to cold, to heat, to precipitation and does not contain salt, soluble in water.

Her pores are blocked by particles (ash) basalt contained in the aluminosilicate.

In the document FR 2105752 described A pumice stone with a grain size from 0.5 to 4 mm and a density of 350 kg/m3.

In the document DE 1941199 AND proposed to carry out the adsorption of oil pumice.

The object of the present invention is a new pumice.

This new pumice is characterized by a carbon content of from 5 to 15 wt.%, preferably from 10 to 13 wt.% and differs in that its particle size is in the range from 3 to 8 mm, and the density is less than or equal to 570 kg/m3in excess of 500 kg/m3.

The carbon content is determined by complete combustion by the Dumas method using a conversion of carbon to CO2and quantitative determination of CO2.

This pumice containing carbon in the adsorbed state on lady remarkable property of adsorbing the hydrocarbons, while being hydrophobic. Therefore, it can be used in particular for cleaning water surfaces contaminated with oil. This is the more interesting because after adsorption of hydrocarbons can be collected from the surface water and treated with a flame for her calcination to decompose the adsorbed hydrocarbons and to the resulting soot was fixed on the pore walls, resulting in pumice again becomes hydrophobic and ready for re-use for cleaning water surfaces.

For the above application preferably choose pumice with a particle size less than 6 mm, with the content of SiO2from 60 to 70 wt.% and content

Al2O3about 17 wt.%, while the rest are heterogeneous products. Pumice type carbon content in accordance with the present invention has a density less than or equal to 570 kg/m3. Pumice in accordance with the present invention has a density in excess of 500 kg/m3. When the particle size from 3 to 8 mm and preferably with an average particle size of 6 mm get the best specific surface area for adsorption of hydrocarbons on the water surface and the best adsorption of these hydrocarbons. Using pumice with the above values of the content of SiO2and Al2O3get the decree is nnow density, therefore, pumice saves on water buoyancy. Her level of immersion is small. Because of this, it ensures the effectiveness of adsorption of hydrocarbons spilled on the water surface, and its easier to remove from the water after adsorption.

The experiments showed that the optimum thickness of the layer of pumice and their broken on the water surface of the water is from 1 to 4 cm and, in particular 3 cm, which provides the performance of adsorption in the amount of 30% of the volume of hydrocarbons in three minutes of adsorption and 80% in half an hour adsorption. The distribution of pumice in accordance with the present invention on the surface of the water carried out in any suitable way, for example by hand, using a bucket, using the device dry or wet spreading.

Collect pumice after adsorption of hydrocarbons using the net, trawl, hydraulic satiates or in any other way.

After collecting pumice saturated hydrocarbons, it can be burn on the spot or process on land in the port installations or devices for heating and steam production for power generation.

Regeneration by burning hydrocarbons is 100%.

Get a pumice stone in accordance with the present invention can be very simply by adsorption of hydrocarbons pumice, and then calcined pumice for burning hydrocarbons that allows pok is set pores soot and to obtain the desired carbon content. Preferably, you first remove the pumice fine fraction, basalt, magnetite and volcanic ash clogging the pores. This can be done by washing with water using at least 20% by weight of water, directing the water jet on the screen, place the pumice. Jet lift granules of pumice, penetrate the pores and cleanse them from pollution, which fall through the sieve, leaving the sieve is cleaned and pumice. After that pumice can be dried, for example at a temperature of from 200 to 250C. until the water content of the pumice will not become less than or equal to 10 wt.%. In particular, often receive pumice with humidity less than 2 wt.%.

The adsorption of hydrocarbons to obtain pumice in accordance with the present invention and its further use for cleaning water from contamination can be performed based, at least 20% by volume of hydrocarbons adsorbed to saturation.

The object of the present invention is also a method, which consists in the fact that distribute the pumice on the surface of the water, leaving it in the water from two minutes to eight hours and preferably from three minutes to two hours, then pumice collected and processed by the flames of combustion of the contained hydrocarbons.

The following test illustrates the invention.

1) Plastic tub area 0.5 m2fill mo is tion water (fifty liters).

2) Sample treated pumice (containing 11,60 wt.% carbon) treated flame to show that burnout was not made.

3) In the bath pour one liter of red household fuel and then on the surface of the bath distribute approximately three liters of treated pumice so that the pellets are completely in contact with the fuel.

The fuel forms on the surface of a thin film of water (very similar to the degasification layer).

4) two minutes after distribution of pumice collected by means of a metal net and loaded into metal wheelbarrow.

5) After you have finished collecting pumice is treated with a flame for combustion of the adsorbed fuel for about ten minutes.

6) then the fuel is again poured into the tub, and distribute water already used pumice.

Again collect pumice and burning fuel in a metal wheelbarrow.

7) is better adsorption than on first use (visual inspection).

After settling sea water transparency has increased.

8) the same operation is repeated fifteen times, each time achieving purification of water contaminated fuel.

The number of organic compounds extracted in dichloromethane is from 180 mg to 220 mg per gram of pumice, as determined by accelerated solvent extraction (SE 200), which is carried out in the system of liquid - solid phase at high pressure (200 bar) and high temperature (130C). The content of the dibasic acids are higher in the surface layer with a thickness of 1 mm, than in the heart of pumice, which was determined by analysis similarbank polar compounds using gas chromatography - mass spectrometry as follows.

1.1. Sample preparation

Sample PES handled in such a way as to isolate the surface and the core of PES. For this surface treated with a metal file, purified dichloromethane to isolate approximately 1 mm thickness of the surface. In this way processed approximately 20-30 PEMs. Isolated thus the surface and the residual core was placed in glass bottles to avoid contamination.

1.2. Extraction under high pressure

Accelerated solvent extraction (ASE 200) allows you to separate the organic extracts from the solid matrix (insoluble organic matter and mineral phases). It is based on extraction in the system liquid - solid phase using solvents or combinations of solvents for extraction at elevated pressure and temperature organic matter. High pressure (200 bar) allow to maintain the solvent in its liquid state is. At high temperatures, the dissolution of the extracts and kinetic dissolution process accelerated in comparison with the solvent at high temperature. This allows you to reduce the amount used of the solvent by increasing the dilution capacity and reduce the extraction time.

Equipment includes steel extraction column, connected to the heating system and suction controlled electronically to maintain the desired conditions of temperature and pressure.

Before extraction in the speaker's base install silica filter to prevent particles in the sample into the system. Then in column placed glass beads to provide a better dispersion of the sample and to obtain, thus, the optimum efficiency of extraction. After that, an "empty" column treated with the same solvent used during extraction (dichloromethane), to ensure the purity of columns, filter, and glass beads (flushing). Table 1 shows the parameters used during the extraction.

Table 1.
The parameters of leaching and extraction columns for ASE 200 ("flow" is the amount of solvent used to wash the column (the percent of Cobham column)).
FlushingExtraction
Temperature (C)150130
Pressure (bar)100150
Flow (%)150150
Static phase (min)55

Before loading into the column, the sample is weighed. Each extraction sample is in compliance with predefined parameters used according to the method (table 1). In the process clarify the duration of the heating column, the oven temperature, pressure, supported in the column and the amount of solvent required for washing column (% stream).

After performing extraction with an organic extract is re-concentrated using a Turbovap evaporator, at a temperature of 35C, then dried at room temperature in a stream of argon to avoid oxidation of the compounds.

1.3. Fractionation of organic extracts

The organic extracts are weighed, and then separated into fractions using liquid chromatography on clay is slightly, or silica microcolony for the three classes of compounds:

- aliphatic hydrocarbons (also known as saturated hydrocarbons),

- aromatic hydrocarbons,

- polar compounds.

The weighing is carried out using a balance Mettler AT 201 with accuracy up to 0.01 mg.

1.3.1. Activation of mineral phases

Activation of different mineral phases used for fractionation (alumina and silica). Each mineral phase (about 100 g), rinsed with cyclohexane and dichloromethane. After this phase is placed in an oven (120C) for a whole night.

1.3.2. Alumina column

Diluted with dichloromethane extracts pump in microcolony containing activated alumina. The eluate consisting of a mixture of saturated hydrocarbons, aromatic hydrocarbons and part of the polar compounds, is collected in the flask. The remainder of polar compounds detained at the head of the column, dilute with a mixture of dichloromethane and methanol (50/50, vol/vol). This first phase on the alumina column allows you to select a complex fraction of polar compounds (macromolecules)that may interfere with the second stage of separation on a silica column.

1.3.3. Silica column

The first fraction obtained by separation on alumina column, dried, and then diluted with n-pentane, and then injected into the silica microcolony. E is at, consisting of saturated hydrocarbons collected in the flask. Aromatic hydrocarbons and polar compounds remain in the head of the column. Aromatic hydrocarbons desorbed using a mixture of n-pentane/dichloromethane (65%/35%) and collected in a flask. Polar compounds wash in a mixture of methyl alcohol/dichloromethane(50%/50%).

After fractionation, each flask is evaporated at room temperature under a weak stream of argon and again weighed. Then, for each sample, you can determine the content of each group of compounds (saturated hydrocarbons, aromatic hydrocarbons and polar compounds).

1.4. Joint gas chromatography - mass spectrometry (GC-MS)

Saturated and aromatic hydrocarbons and polar compounds were analyzed using gas chromatograph Hewlett-Packard HP 5890 series II, connected to a mass spectrometer Hewlett-Packard 5972. Use the injector type split/splitless, constantly heated to 300C. Chromatographic separation is carried out using a capillary column to melt the silica DB-5 (J&W Scientific (length: 60 m, diameter: 0.25 mm; film thickness: 0.1 mm) with non-polar phase (5% phenilmethylsulfoxide) temperature program: 60C-130C at 15C/min, the horizontal part of 15 minutes at 300C. the carrier Gas is helium, flow to the th support constant at 1 ml/min throughout the analysis. Chromatograph connected to a mass spectrograph using transition line, heated to 320C.

Various organic fractions were analyzed in the "fullscan". This analysis mode allows you to record ions, the charges which are in the range from m/z=50 to 450. This method is used to identify the present compounds. Each chromatographic peak produces a mass spectrum characteristic of the connection structure formed molecular ion and fragments produced in collisions with electrons. Polar compounds dissolve using BSTFA that allows similarobama to improve the resolution of polar molecules (carboxylic acids, alcohols)that may be present in this fraction.

1. Pumice, which is characterized by a carbon content of from 5 to 15 wt.%, characterized in that the size of its particles is in the range from 3 to 8 mm, and the density is less than or equal to 570 kg/m3and in excess of 500 kg/m3.

2. Pumice according to claim 1, characterized in that its average particle size is equal to 6 mm

3. Pumice in one of the preceding paragraphs, characterized in that it contains SiO2from 60 to 70 wt.% and Al2O3about 17 wt.%, while the rest are heterogeneous products.

4. The method of obtaining pumice with a carbon content of from 5 to 15 wt.% with frequent size is C from 3 to 8 mm and a density, less than or equal to 570 kg/m3and in excess of 500 kg/m3that includes the adsorption of hydrocarbon pumice and processing pumice, adsorbirovavshyei hydrocarbon flame for combustion and the release of pumice, characterized in that before adsorption pumice hydrocarbon from it remove the fine fraction, basalt, magnetite and volcanic ash filling the pores with the help of water jets on the screen, place the pumice.

5. The method of cleaning the water surface, characterized in that the pumice with a carbon content of from 5 to 15 wt.% with a particle size of from 3 to 8 mm and a density less than or equal to 570 kg/m3and in excess of 500 kg/m3distribute on the water surface, leave it for two minutes to eight hours, preferably from three minutes to two hours, then pumice collected and processed by the flames of combustion of the contained hydrocarbons and these operations repeated.

6. The method according to claim 5, characterized in that the pumice distribute a layer thickness of from 1 to 4

7. The method according to claim 6, characterized in that the carbon content is from 10 to 13 wt.%.



 

Same patents:

FIELD: chemistry.

SUBSTANCE: waste waters containing thiocyanate and beforehand added hydrogen peroxide are passed through galvanocoagulative charge (mixture of iron turnings and coke taken in equal volume parts) with simultaneous fed of air oxygen. The thiocyanate oxidation with hydrogen peroxide is carried out at pH 2-2.5 in the presence of iron ions continuously generated at intensive dissolution of anode component of galvanocoagulative charge Fe-C at mole ratio H2O2/SCN- equal 4-1. The claimed method provides the high level of water purification, decrease of oxidiser consumption due to permanent generation of iron catalyst directly in purification process, significant decrease of operating costs and cost decrease of purification process due to usage for active loading of waste products - iron turnings (prompt industrial scrap) and coke. Besides the claim method allows to decontaminate the waste waters from heavy metal ions and to decrease the salt content in recycled water.

EFFECT: claim method is safe and economically expedient.

3 cl, 1 dwg, 2 ex

FIELD: chemistry.

SUBSTANCE: waste waters containing thiocyanate and beforehand added hydrogen peroxide are passed through galvanocoagulative charge (mixture of iron turnings and coke taken in equal volume parts) with simultaneous fed of air oxygen. The thiocyanate oxidation with hydrogen peroxide is carried out at pH 2-2.5 in the presence of iron ions continuously generated at intensive dissolution of anode component of galvanocoagulative charge Fe-C at mole ratio H2O2/SCN- equal 4-1. The claimed method provides the high level of water purification, decrease of oxidiser consumption due to permanent generation of iron catalyst directly in purification process, significant decrease of operating costs and cost decrease of purification process due to usage for active loading of waste products - iron turnings (prompt industrial scrap) and coke. Besides the claim method allows to decontaminate the waste waters from heavy metal ions and to decrease the salt content in recycled water.

EFFECT: claim method is safe and economically expedient.

3 cl, 1 dwg, 2 ex

FIELD: chemistry.

SUBSTANCE: waste waters containing thiocyanate and beforehand added hydrogen peroxide are passed through galvanocoagulative charge (mixture of iron turnings and coke taken in equal volume parts) with simultaneous fed of air oxygen. The thiocyanate oxidation with hydrogen peroxide is carried out at pH 2-2.5 in the presence of iron ions continuously generated at intensive dissolution of anode component of galvanocoagulative charge Fe-C at mole ratio H2O2/SCN- equal 4-1. The claimed method provides the high level of water purification, decrease of oxidiser consumption due to permanent generation of iron catalyst directly in purification process, significant decrease of operating costs and cost decrease of purification process due to usage for active loading of waste products - iron turnings (prompt industrial scrap) and coke. Besides the claim method allows to decontaminate the waste waters from heavy metal ions and to decrease the salt content in recycled water.

EFFECT: claim method is safe and economically expedient.

3 cl, 1 dwg, 2 ex

FIELD: chemistry.

SUBSTANCE: treatment of water solutions in diaphragm electrolyser is carried out at specific electricity quantity not less than 12000 C/l and current density not less than 4000 A/m2 up to redox potential of catholyte more than 1000 mV and anolyte more than 1300 mV. The device is designed as diaphragm electrolyser containing the tank separated with ion-permeable membrane to two chambers (cathode and anode) where the corresponding electrodes are vertically mounted. The tank walls and diaphragm are corrugate; solution feeding is carried out with ejector nozzles. The diaphragm can be made planar and electrodes tubular or rod-shaped. The diaphragm can be cylindrical and located in the tank centre forming thus the inner chamber in which centre the tubular or rod-shaped electrode is positioned, the second electrode is cylindrical and mounted coaxially to the diaphragm in the outer chamber.

EFFECT: quality enhancing of obtained production.

4 cl, 4 dwg, 1 tbl

FIELD: chemistry.

SUBSTANCE: system for natural waters desalting contains the pretreatment device and reverse osmosis device based on a membrane elements containing at least one desalting stage. Every stage includes paralleled at least one working and one reserve module. At the outlet stage of reversed osmosis device the collectors of permeate and/or concentrate in the division of working modules connection are connected through additional cutoff devices on-line with inlet of at least one reserve module of the same stage.

EFFECT: maximal usage of all installed membrane modules.

10 cl, 4 dwg, 4 tbl, 3 ex

FIELD: mechanics.

SUBSTANCE: device represents a belt conveyor and includes thin metal loop belt perforated at sides and installed on two hollow sealed drums mounted on a mobile frame attached by supports to immobile frame. Each drum carries a single drive sprocket at its end. Conveyor can sway against surface fluid layer. Drain chute with drain system is carried out upwards and mounted so as to contact the belt at the mounting point on immobile frame. Rollers are provided between surfaces of drums and mobile frame.

EFFECT: enhanced efficiency of surface layer removal.

4 dwg

FIELD: mechanics.

SUBSTANCE: device represents a belt conveyor and includes thin metal loop belt perforated at sides and installed on two hollow sealed drums mounted on a mobile frame attached by supports to immobile frame. Each drum carries a single drive sprocket at its end. Conveyor can sway against surface fluid layer around the axis of driving hollow sealed drum. Immobile frame is mounted on board in the fore part of self-propelled barge, or on settling tank at workfloor. Drain chute with drain system is carried out upwards and mounted so as to contact thin metal loop belt perforated at sides at the mounting point on immobile frame. Slides are provided between surfaces of drums and mobile frame.

EFFECT: enhanced efficiency of fluid surface layer removal.

4 dwg

FIELD: chemistry.

SUBSTANCE: method includes mixing of water flow with gaseous oxygen. Then water flow is treated with ultraviolet radiation during and after water flow pass through bed containing of particles of silicon-containing mineral. The device consists of the tank provided with water flow inlet and outlet. The inlet is connected with mixer feeding the water flow to the perforated bowl located inside the tank. The source of ultraviolet radiation is located between bowl and inner surface of tank wall with particles of silicon-containing mineral being located inside the bowl.

EFFECT: simplifying and cheapening of the obtaining of high-quality drinking water increase of time during which the water retains its active properties.

16 cl, 1 dwg

FIELD: chemistry.

SUBSTANCE: device for liquids purification contains the body with purificated liquid connection, outlet and inlet regenerating liquid connections, prefabricated frame construction filled with sorbent and designed as cartridge cassette. Every cartridge is separated from the next one with impermeable membrane and in its lower part is provided with connection for regenerating liquid supply and lock valve for sorbent removal from cartridge; in its upper part every cartridge is provided with connection for regenerating liquid outlet and lock valve for batch feeding of fresh sorbent.

EFFECT: increasing of the effective section area in the volume unit, simplifying of the device construction, increase of device productivity and decrease of its cost, enhancing of washing efficiency.

5 cl, 4 dwg

FIELD: chemistry.

SUBSTANCE: device for obtaining of thaw water by water freezing and its following unfreezing includes broadening upward and round in plan view tank for water freezing with heat-insulating top cover and bottom mounted on the heat-insulating pallet. The water freezing tank is provided with vertical tube which lower hole looks on the outer tank surface. The bottom and side wall of water freezing tank can be designed double-layered (having outer and inner walls), with holes for hot water inlet and outlet. The device for thaw water obtaining can additionally be provided with water unfreezing tank with holes thaw water bleeding in the centre and periphery of its bottom. The inner part of the bottom has the ring around of the central hole with diametre not less than diametre of the removed contaminated ice column; the design of central hole allows flow control of the bled contaminated thaw water.

EFFECT: increase of thaw water yield, enhancing of the removal efficiency of the ice with decreased deuterium content, enhancing of device usability.

3 cl, 8 dwg

FIELD: chemistry.

SUBSTANCE: method for carbon material preparation includes carbonisation of the high-ash biomass in the air or inert atmosphere, carbonised biomass mixing with carbonate of alkaline metal or with carbonates mixture of alkaline metals in powder form at mole ratio carbonate of alkaline metal/silicon dioxide of the carbonised biomass equal to (1:1) - (1:5), heat treatment of the mixture at 700-1000C in the inert atmosphere, washing and drying.

EFFECT: obtaining of the material with high textural properties from cheap plant raw materials.

4 cl, 2 dwg, 11 ex

FIELD: chemistry.

SUBSTANCE: invention refers to the technology of preparation of carbon sorbents used for hemosorption in the treatment of the diseases accompanied by the accumulation in human organism of certain toxic substances. The method for processing of carbon hemosorbent includes the processing of the porous carbon material with air by the way of contacting with air-water mixture in boiling bed and additional hemosorbent treatment in fixed bed with 4-6% solution of nitric acid fed to the reaction zone in definite time intervals following with air input with volume rate 8 m3/hr for sorbent mixing. The said acid treatment is carried out during 7 hrs, acid/sorbent ratio is 1:(29-32). The obtained sorbent is dried at 200C up to residual residual moisture content 0.2%.

EFFECT: preparation of sorbent with high adsorbent activity in relation to nitrogen-containing nonprotein toxic substances such as bilirubin, creatinine, urea.

1 tbl

FIELD: technological processes.

SUBSTANCE: invention is related to the field of environment protection, namely to sorbents for treatment of sewage water, gas exhausts and oil spills, and for ion-exchange treatment of plating industry drains. Method for production of sorbent includes grinding of initial components, mixing, carbonisation, activation, flushing with return alkaline solutions and drying, at that initial components are used: peat, aluminium silicate and black coal, which are ground down to the following particle size, mm: peat 1.0-3.0, aluminium silicate 0.1-0.3, black coal 0.1-0.3, carboniaation is carried out at temperature of 750-800C for 15 minutes without air access, and activation is done in boiling layer in flow of mixture of carbonic acid gas and water vapor at temperature of 750-800C for 15-30 minutes or in atmosphere of oxygen for 3-5 minutes.

EFFECT: production of material with developed specific surface and ion-exchange properties, and also reduction of negative effect at environment in process of production.

1 tbl

FIELD: oil and gas industry.

SUBSTANCE: invention refers to sorbents of oil and oil products. Sorbent material consists of a layer of thermo-plastic polymer fibers bound between them and of a secured on fibers substance with hydrophobic properties; the substance corresponds to disperse carbon; particles of disperse carbon are of 50-1000 Angstrom size; share of carbon attached to fibers is from 1 to 25% of fibers weight. The method of fabrication of sorbent material consists in forming the layer out of thermo-plastic polymer fibers, in treating them with the substance possessing hydrophobic properties and in thermal processing of material to facilitate thermal binding of fibers; also as a substance with hydrophobic properties disperse carbon is used; thermal treatment is performed to attach carbon to the surface of fibers; after that not attached particles of carbon are removed.

EFFECT: invention facilitates increased sorbent property of material, rate of sorption and regeneration ratio and also increased floatability of material.

7 cl, 3 tbl

FIELD: woodworking industry.

SUBSTANCE: invention is related to sorption engineering and may be used for production of adsorbent in the form of charcoal applied for lead ions adsorption from water medium. Adsorbent preparation includes pyrolysis of natural wood of soft hardwood - aspen, which is at first compacted, then exposed to thermal treatment and, afterwards, pyrolysis. Produced charcoal is crushed and separated, at that wood is compacted prior to pyrolysis 2.5 times relative to initial volume. In process of separation fraction charcoal is taken out, for instance 0.1-0.3 mm.

EFFECT: invention provides for expansion of technological possibility for water medium purification from lead ions due to application of suggested adsorbent at minimum duration of water medium purification process and increased quality of purification.

1 tbl

FIELD: technological processes.

SUBSTANCE: invention may be used in chemical industry and environment protection. Waste gas flow is cooled, compressed by compressor and then passed through material that is half-permeable for gas, for instance, molecular sieve or activated coal. Adsorption and desorption of carbon dioxide in half-permeable material is carried out in compliance with adsorption technology at periodical change or swinging of temperature (AKT). Part of separated gas flow that contains highly concentrated carbon dioxide is used as initial material for production of ammonia and urea or methanol or is collected and stored for further use.

EFFECT: lower consumption of energy, reduced structural expenses and expenses on servicing.

5 cl, 1 dwg

FIELD: technological processes.

SUBSTANCE: invention concerns chemical technology, particularly sorbent production for elimination of oil products from industrial sewage, and can be applied in power engineering, metallurgy, chemical technology, mining and other industrial fields. Method of obtaining carbon sorbent involves brown coal grinding into 0.5-5 mm fraction, heating to 150-300°C, maturing at this temperature for 2-5 hours with continuous withdrawal of gases exuded during heating, and cooling down.

EFFECT: reduced power input for obtaining carbon sorbent with high sorption properties.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to methods of obtaining sorbents for catching gaseous fluorides: hydrogen fluoride, molybdenum, tungsten, rhenium, uranium, etc. hexafluorides. Method of sorbet production includes preparation of charge from fluorides of alkaline or alkali-earth metals and porephore, formation of granules, their drying at temperature 60-150°C and sintering at temperature 350-550°C, as porephore ammonium carbonate in amount 15÷50% of fluoride weight is used. Invention allows to reduce corrosive impact of charge components on equipment materials and eliminate of equipment blocking with ammonium fluoride.

EFFECT: obtaining cyclically stable granules which have acceptable specific surface and mechanical strength.

2 cl, 3 ex, 1 tbl

FIELD: oil and gas industry.

SUBSTANCE: soot paste is granulated and thermo-treated in an inert gas flow at the temperature of 600-800°C during 10-30 minutes.

EFFECT: producing of sorbent possessing increased capacity out of soot paste of electro-cracking of organic compounds.

3 ex,1 tbl

FIELD: process flows, filters.

SUBSTANCE: invention is related to sorbtion filtering materials used in safety equipment intended for filtering of air from gases, vapors and aerosols. The material consists of air-permeable base surfaces, layer of electrically charged ultrathin polymer fiber for air filtering from aerosols and sorbing layer that contains fixed particles of absorbent carbon consisting of mixture of coal - calalytic agent of the KT type and gas coal of SKT type of fineness 60-80 micron, distributed and fixed in the volume of pulp fibers at rate coal - calalytic agent of the KT type / gas coal of SKT type as 1.15-3.5:1; at that the layer of electrically charged ultrathin polymer fiber is applied in the high voltage field to sorbing layer.

EFFECT: provided possibility of all-purpose respiratory protection from hazardous gases, vapors and aerosols when the material is used in individual and shared air filtering equipment.

1 tbl, 2 dwg

FIELD: chemistry.

SUBSTANCE: invention refers to the method for preparation of polymer-clayish composition which can be used in different branches of industry as sorbent for water purification and decontamination. According to the invention the surface activator - guanidine-containing salt with quaternary nitrogen atom is added to bentonite clay and then the activated surface is treated with unsaturated organic acid (acrylic or metacrylic) in presence of radical initiator of polymerisation - ammonium persulphate. The mixture is heated at temperature 60-70C with stirring up to polymerisation of unsaturated organic acid. The mass ratio of activated bentonite clay to unsaturated organic acid is 1:12.

EFFECT: simplifying of the process of bentonite surface activation, enhancing of sorption activity, improvement of bentonite performance as well as transfer to bentonite composition of biocide properties.

3 tbl, 9 ex, 1 dwg

Up!