Carbon catalyst support preparation method
FIELD: carbon materials.
SUBSTANCE: invention relates to porous carbon materials and, more specifically, to carbon catalyst supports and sorbents. Preparation of catalyst support is accomplished by treating carbon black with hydrocarbon gas at heating and stirring until mass of carbon material increases by 2-2.5 times, after which resulting compacted material is oxidized, said hydrocarbon gas being gas originated from liquid hydrocarbon electrocracking and said treatment being carried out at 400-650°C.
EFFECT: simplified technology.
1 tbl, 6 ex
The invention relates to the field of porous carbon materials that are used in Hydrotreating processes, hydrogenation of hydrocarbons and the synthesis of hydrocarbons by the Fischer-Tropsch.
Intensive development of the research and development of new high-performance processes of catalysis and adsorption requires expanding the range of porous media, including carbon carriers having a high absorptive capacity.
Known carbon carriers [USSR Author's certificate 1352707 A1, B01J 37/10, 35/10, 21/18. Publ. 10.07.1996]obtained the seal of soot by pyrocarbon formed by the decomposition of hydrocarbons, and subsequent treatment of formed material vapor mixture.
The disadvantage of these methods is the low stability with respect to physico-mechanical effect.
The closest technical solution achieved the effect is [USSR Author's certificate 1453682 A1, 01J 37/08, 21/18, 32/00. Publ. 10.09.1996]. According to him, the carbon material obtained by processing carbon black propane-butane gas mixture under stirring and the temperature 750-1200°before the formation of compacted carbon material with subsequent processing of the vapor mixture.
The disadvantage of this method is the high temperature decomposition of the hydrocarbon gas.
Technical is the definition of the invention is to reduce the temperature of decomposition of the hydrocarbon gas, that will reduce the cost of obtaining carbon media.
This technical result is achieved that the sealing soot is carried out at temperatures amounts to 400-650°C due To the decomposition applied to the mixture with her gas electrocoating liquid hydrocarbons whose composition, vol.%: H2- 60-80, CH4- 1-5, With2H6- 0,15-0,5, C2H4- 1-16, With3H6- 0,2-1, C2H2- 10-24. More detailed information about the decomposition of hydrocarbons in an electric arc and the composition of the produced gas is given in [editor Dragunov AS Chemical reactions of organic products in electric discharges. M.: Nauka, 1966, 199 S.]. Compacted to increase the weight of the sample in 2-2,5 times the material was then subjected to oxidation.
Examples illustrating the invention.
In a quartz reactor with a diameter of 20 mm load ˜0.5 g of carbon black with specific adsorption surface 100 m2/greater purge with inert gas and heated to a temperature of 650°C. Upon reaching this temperature, with continuous stirring, the reactor serves gas electrocoating liquid hydrocarbons with a flow rate of 150 ml/min. and the gas Flow is to increase the sample mass 2 times due to thermal decomposition of the hydrocarbon gas. The resulting material is subjected to oxidation. Okislyayutsya until while the weight loss (oxidation) will not be 50%. Output process indicators presented in the table.
In a quartz reactor with a diameter of 20 mm load ˜0.5 g of carbon black with specific adsorption surface 100 m2/year / Reactor purge with inert gas and heated to a temperature of 500°C. Upon reaching this temperature, with continuous stirring, the reactor serves gas electrocoating liquid hydrocarbons with a flow rate of 150 ml/min. and the gas Flow is to increase the weight of the sample is 2.2 times due to thermal decomposition of the hydrocarbon gas. Oxidation continues until the degree of oxidation will not be 50%. Output process indicators presented in the table.
In a quartz reactor with a diameter of 20 mm load ˜0.5 g of carbon black with specific adsorption surface 100 m2/year / Reactor purge with inert gas and heated to a temperature of 400°C. Upon reaching this temperature, with continuous stirring, the reactor serves gas electrocoating liquid hydrocarbons with a flow rate of 150 ml/min. and the gas Flow is to increase the sample mass 2.5 times due to thermal decomposition of hydrocarbon gas. The resulting material is subjected to oxidation. Oxidation continues until the degree of oxidation will not be 50%. The weekend show is whether the process is presented in the table.
The carbon carrier was obtained by the method of example 1. Differences: temperature seals soot - 300°C. Output process indicators presented in the table.
The carbon carrier was obtained by the method of example 2. Differences: temperature seals soot - 700°C. Output process indicators presented in the table.
The carbon carrier was obtained by the method of example 1. Differences: as the hydrocarbon gas used was a mixture containing 50 vol.% propane and 50% vol. butane. Output process indicators presented in the table.
The stability of the obtained media to physico-mechanical stress was determined by its ability to adsorb methyl orange from aqueous solution. Physico-mechanical impact of the media were subjected to the example of the prototype. The results are presented table.
Output indicators under seal in obtaining carbon media
|Carbon material||The seal of the source material||Sorption activity, mg/g|
|The conversion of acetylene, %||The output of carbon, g/l||To physico-mechanical effects||After physico-mechanical effects||The loss of sorption activity, %|
|The placeholder||-||-||˜100||not determined||-|
|For example 1||100||0,27||140||135||3,6|
|For example 2||100||0,23||132||125||5,3|
|For example 3||89||0,15||125||115||8,0|
|In example 4||10||0,05||120||109||9,2|
|For example, 5||100||0,27||140||136||2,9|
|In example 6||-||0,17||129||118||8,5|
From the presented data shows that the use of gas electrocoating liquid hydrocarbons can significantly lower the temperature of the densification process of soot while maintaining stability of the sample to the physico-mechanical effect.
The method of obtaining carbon catalyst carrier by processing of soot in hydrocarbon gas while heating and stirring to increase the weight of the material in 2÷2,5 the Aza with subsequent oxidation of the resulting material, characterized in that the hydrocarbon gas use gas electrocleaning liquid hydrocarbons and the treatment is carried out at a temperature amounts to 400-650°C.
FIELD: petrochemical process catalyst.
SUBSTANCE: invention relates to a method of preparing catalyst for use in Fischer-Tropsch process and to catalyst obtained according present invention. Preparation of catalyst suitable for conversion at least one synthesis gas component comprises: providing aqueous solution of organic acid; adding iron metal to acid solution; passing oxidant through the solution until iron metal is consumed and iron-containing slurry formed; grinding resulting slurry to achieve average particle size less than about 2 μm; adding at least one promoter to ground iron-containing slurry to form product suspension, concentration of said promoter being such as to obtain said product suspension containing solid phase constituting from about 10 to about 40% of the weight of suspension, including said promoter; performing spray drying of suspension to obtain particles; and calcining these particles to obtain desired catalyst.
EFFECT: optimized catalyst preparation procedure.
23 cl, 2 dwg, 1 tbl, 12 ex
FIELD: petroleum processing catalysts.
SUBSTANCE: catalyst containing platinum, rhenium, antimony, and chlorine on alumina are prepared by impregnation of carrier with aqueous solution of compounds of indicated elements, antimony being deposited as first or second component. Once antimony or platinum-antimony combination, or rhenium-antimony combination deposited, catalyst is dried at 130°C and then calcined in air flow at 500°C. Reduction of catalyst is performed at 300-600°C and pressure 0.1-4.0 MPa for 4 to 49 h. After deposition of antimony or two elements (platinum-antimony or rhenium-antimony) and drying-calcination procedures, second and third or only third element are deposited followed by drying and calcination. Final reduction of catalyst is accomplished in pilot plant reactor within circulating hydrogen medium at pressure 0.3-4.0 MPa and temperature up to 600°C for a period of time 12 to 48 h.
EFFECT: enhanced aromatization and isomerization activities of catalyst and also its stability.
2 cl, 1 tbl, 8 ex
FIELD: exhaust gas afterburning means.
SUBSTANCE: invention relates to catalytic neutralizer for treating internal combustion engine exhausted gases. Proposed catalyst is composed of catalytically active coating on inert ceramic or metallic honeycomb structure, wherein coating contains at least one platinum group metal selected from series including platinum, palladium, rhodium, and iridium on fine-grain supporting oxide material, said supporting oxide material representing essentially nonporous silica-based material including aggregates of essentially spherical primary particles 7 to 60 nm in diameter, while pH of 4% water dispersion of indicated material is below 6.
EFFECT: increased catalyst activity and imparted sufficient resistance to aggressive sulfur-containing components.
27 cl, 2 dwg, 7 tbl, 6 ex
FIELD: petroleum processing and catalysts.
SUBSTANCE: invention relates to catalyst for steam cracking of hydrocarbons, which catalyst contains KMgPO4 as catalyst component. Catalyst is prepared by dissolving KMgPO4 precursor in water and impregnating a support with resulting aqueous solution of KMgPO4 precursor or mixing KMgPO4 powder or its precursor with a metal oxide followed by caking resulting mixture. Described is also a light olefin production involving steam cracking of hydrocarbons.
EFFECT: increased yield of olefins, reduced amount of coke deposited on catalyst, and stabilized catalyst activity.
21 cl, 4 tbl, 14 cl
FIELD: hydrogenation-dehydrogenation catalysts.
SUBSTANCE: invention provides copper and silica-based catalyst containing 22.5-53.0% copper. Catalyst is prepared by reductive thermal decomposition of copper silicate in hydrogen flow at 380-450°C. catalyst is used in dihydroxyalkane production processes carried out at 180-200°C.
EFFECT: increased activity and selectivity of catalyst.
3 cl, 1 tbl, 8 ex
FIELD: gas treatment processes and catalysts.
SUBSTANCE: invention relates to catalyst for selectively oxidizing hydrogen sulfide to sulfur in industrial gases containing 0.5-3.0 vol % hydrogen sulfide and can be used at enterprises of gas-processing, petrochemical, and other industrial fields, in particular to treat Claus process emission gases, low sulfur natural and associated gases, chemical and associated petroleum gases, and chemical plant outbursts. Catalyst for selective oxidation of hydrogen sulfide into elementary sulfur comprises iron oxide and modifying agent, said modifying agent containing oxygen-containing phosphorus compounds. Catalyst is formed in heat treatment of α-iron oxide and orthophosphoric acid and is composed of F2O3, 83-89%, and P2O5, 11-17%. Catalyst preparation method comprises mixing oxygen-containing iron compounds with modifying agent compounds, extrusion, drying, and heat treatment. α-Iron oxide used as oxygen-containing iron compound is characterized by specific surface below 10 m2/g, while 95% of α-iron oxide have particle size less than 40 μm. Orthophosphoric acid is added to α-iron oxide, resulting mixture is stirred, dried, and subjected to treatment at 300-700°C. Hydrogen sulfide is selectively oxidized to elemental sulfur via passage of gas mixture over above-defined catalyst at 200-300°C followed by separation of resultant sulfur, O2/H2S ratio in oxidation process ranging from 0.6 to 1.0 and volume flow rate of gas mixture varying between 900 and 6000 h-1.
EFFECT: increased yield of elemental sulfur.
9 cl, 5 tbl, 9 ex
FIELD: petrochemical process catalysts.
SUBSTANCE: group of inventions relates to conversion of hydrocarbons using micro-mesoporous-structure catalysts. A hydrocarbon conversion process is provided involving bringing hydrocarbon raw material, under hydrocarbon conversion conditions, into contact with micro-mesoporous-structure catalyst containing microporous crystalline zeolite-structure silicates composed of T2O3(10-1000)SiO2, wherein T represents elements selected from group III p-elements and group IV-VIII d-elements, and mixture thereof, micro-mesoporous structure being characterized by micropore fraction between 0.03 and 0.40 and mesopore fraction between 0.60 and 0.97. Catalyst is prepared by suspending microporous zeolite-structure crystalline silicates having above composition in alkali solution with hydroxide ion concentration 0.2-1.5 mole/L until residual content of zeolite phase in suspension 3 to 40% is achieved. Thereafter, cationic surfactant in the form of quaternary alkylammonium of general formula CnH2n+1(CH3)3NAn (where n=12-18, An is Cl, Br, HSO4 -) is added to resulting silicate solution suspension and then acid is added formation of gel with pH 7.5-9.0. Gel is then subjected to hydrothermal treatment at 100-150°C at atmospheric pressure or in autoclave during 10 to 72 h to produce finished product.
EFFECT: enlarged assortment of hydrocarbons and increased selectivity of formation thereof.
16 cl, 2 dwg, 2 tbl
FIELD: engineering of Fischer-Tropsch catalysts, technology for producing these and method for producing hydrocarbons using said catalyst.
SUBSTANCE: catalyst includes cobalt in amount ranging from 5 to 20 percents of mass of whole catalyst on argil substrate. Aforementioned substrate has specific surface area ranging from 5 to 50 m2/g. Catalyst is produced by thermal processing of argil particles at temperature ranging from 700 to 1300°C during period of time from 1 to 15 hours and by saturating thermally processed particles with cobalt. Method for producing hydrocarbon is realized accordingly to Fischer-Tropsch method in presence of proposed catalyst.
EFFECT: possible achievement of high selectivity relatively to C5+ at low values of diffusion resistance inside particles.
3 cl, 9 ex, 9 dwg
FIELD: structural chemistry and novel catalysts.
SUBSTANCE: invention provides composition including solid phase of aluminum trihydroxide, which has measurable bands in x-ray pattern between 2Θ=18.15° and 2Θ=18.50°, between 2Θ=36.1° and 2Θ=36.85°, between 2Θ=39.45° and 2Θ=40.30°, and between 2Θ=51.48° and 2Θ=52.59°, and has no measurable bands between 2Θ=20.15° and 2Θ=20.65°. Process of preparing catalyst precursor composition comprises moistening starting material containing silicon dioxide-aluminum oxide and amorphous aluminum oxide by bringing it into contact with chelating agent in liquid carrier and a metal compound; ageing moistened starting material; drying aged starting material; and calcining dried material. Catalyst includes carrier prepared from catalyst composition or catalyst precursor and catalytically active amount of one or several metals, metal compounds, or combinations thereof. Catalyst preparation process comprises preparing catalyst carrier from starting material containing silicon dioxide-aluminum oxide and amorphous aluminum oxide by bringing it into contact with chelating agent and catalytically active amount of one or several metals, metal compounds, or combinations thereof in liquid carrier, ageing starting material; drying and calcinations. Method of regenerating used material involves additional stage of removing material deposited on catalyst during preceding use, while other stages are carried out the same way as in catalyst preparation process. Catalyst is suitable for treating hydrocarbon feedstock.
EFFECT: improved activity and regeneration of catalyst.
41 cl, 3 dwg, 8 tbl, 10 ex
FIELD: oxidation catalysts.
SUBSTANCE: invention relates to sorption engineering and can be used for regeneration of different kinds of hopcalite lost catalytic activity during long-time storage. Regenerated sorbents can be used un respiratory masks and in processes or removing carbon monoxide from industrial emissions. Invention provides a method for activating carbon monoxide oxidation catalyst involving heat treatment thereof and characterized by that activation is conducted by heating catalyst bed 2-3 cm thick to 180-380°C at temperature rise velocity 10-20°C/min while constantly carrying away reactivation products.
EFFECT: enabled restoration of catalytic activity.
FIELD: catalyst preparation.
SUBSTANCE: invention relates to supported catalysts and provides a method for preparing catalyst-containing solid product comprising step, wherein ceramic carrier is applied onto metallic surface, and depositing catalytically active material onto ceramic carrier, which was preliminarily coated with supporting porous metallic material, ceramic carrier being applied onto and/or into supporting porous metallic material. Invention also describes device used in preparation of catalyst-containing solid product for applying supporting porous material onto inside or outside metallic surfaces of the hollow body.
EFFECT: increased stability of catalyst.
7 cl, 2 dwg
FIELD: polymerization processes and catalysts.
SUBSTANCE: invention relates to preparing supported titanium-magnesium catalyst for production of polyethylene and superhigh-molecular weight polyethylene via suspension polymerization of ethylene in hydrocarbon solvent. Invention provides a method for preparing supported ethylene polymerization catalyst containing titanium compound on magnesium-containing support, which is prepared by interaction of dissolved organomagnesium compound having following composition: MgPh2·nMgCl2·mR2O, wherein R represents butyl or isoamyl, n=0.37-0.7, and m=1-2, with compounds inducing conversion of organomagnesium compound into solid magnesium-containing support. As such compounds, there is used a composition including product of reaction of alkylsilane R'kSi4-k, wherein R is alkyl or phenyl and k=1, 2, with silicon tetraalkoxide Si(OEt)4 at molar ratio 2-4, respectively, and a dialkylaromatic ether. Catalyst is characterized by high activity at temperatures ≤60°C and particle size within a range 5.5 to 3.0 μm. Catalyst allows a polymer powder with average particle size ≤150 μm, narrow particle size distribution, and high loose density (≥250 g/L) to be obtained.
EFFECT: enhanced low-temperature catalyst activity and selectivity.
3 cl, 1 tbl, 15 ex
FIELD: production of pigments and catalysts based on titanium dioxide, in particular, process for treatment of titanium dioxide for removal of sulfur, in particular sulfates.
SUBSTANCE: method involves treating calcined titanium dioxide at elevated temperatures using aqueous solution containing one or more ammonium compounds; separating titanium dioxide from aqueous solution and drying titanium dioxide. Ammonium compounds preferably used in treatment process are ammonium acetate or ammonium chloride.
EFFECT: increased efficiency in cleaning of titanium dioxide from sulfur, in particular sulfates.
9 cl, 5 tbl, 5 ex
FIELD: catalyst carriers.
SUBSTANCE: invention relates to structure and composition of carrier based on grid-structured tissue of glass, silica, or another interaction fiber treated with formulations imparting rigidity to grids and preventing deformation-caused destruction of fibers, which carrier is used mainly to retain photocatalytically active material on its surface, but also suitable to retain catalysts exhibiting activity in the absence of light. Provided is catalyst carrier constituted by one or several arranged in parallel layers of corrugated grid made from inorganic woven fibers and impregnated with binding material or constituted by one or several arranged in parallel layers of non-corrugated grid also made from inorganic woven fibers and impregnated with binding material.
EFFECT: increased catalyst retention ability and increased area of illuminated photocatalyst surface.
3 cl, 3 dwg, 8 ex
FIELD: alternate fuels.
SUBSTANCE: invention relates to production of synthetic gas via catalytic hydrocarbon conversion in presence of oxygen-containing gases and/or water steam as well as to catalysts suitable for this process. Invention provides catalyst, which is complex composite constituted by supported precious element, or supported mixed oxide, simple oxide, transition element, wherein support is a metallic carrier made from metallic chromium and/or chromium/aluminum alloy coated with chromium and aluminum oxides or coated with oxides of chromium, aluminum, or mixtures thereof. Catalyst preparation procedure and synthetic gas production process are also described.
EFFECT: increased conversion of hydrocarbons, selectivity regarding synthetic gas, and heat resistance of catalyst at lack of carbonization thereof.
4 cl, 3 tbl, 9 ex
FIELD: organic synthesis catalysts.
SUBSTANCE: invention relates to creating carriers for catalysts used in epoxidation of olefins and provides catalyst containing at least 95% α-alumina with surface area 1.0 to 2.6 m2/g and water absorption 35 to 55%, and which has pores distributed such that at least 70% pore volume is constituted by pores 0.2 to 10 μm in diameter, wherein pores with diameters 0.2 to 10 μm form volume constituting at least 0.27 ml/g of carrier. Also described is a method for preparing catalyst carrier, which envisages formation of mixture containing 50-90% of first α-alumina powder with average particle size (d50) between 10 and 90 μm; 10-50% (of the total weight of α-alumina) of second α-alumina powder with average particle size (d50) between 2 and 6 μm; 2-5% aluminum hydroxide; 0.2-0.8% amorphous silica compound; and 0.05-0.3% alkali metal compound measured as alkali metal oxide, all percentages being based on total content of α-alumina in the mixture. Mixture of particles is then calcined at 1250 to 1470°C to give target carrier.
EFFECT: increased activity of catalyst/carrier combination and prolonged high level of selectivity at moderated temperatures.
21 cl, 3 tbl
FIELD: technical chemistry; catalyst carriers for various heterogeneous processes in chemical industry.
SUBSTANCE: proposed carrier has metal base made from chromium and aluminum alloy and/or metallic chromium and coat made from chromium of aluminum oxides or oxides of chromium, aluminum, rare-earth elements or mixture of them. Method of preparation of carrier includes forming of metal powder containing aluminum and other powder-like components and calcination of carrier at solid phase sintering point; used as additional component of metal powder is powder-like chromium; mixture thus obtained is subjected to mechanical activation and is placed in mold accessible for water vapor, after which it is subjected to hydro-thermal treatment and molded product is withdrawn from mold, dried and calcined at respective temperature; then additional layer of aluminum and rare-earth elements oxides or mixture of solutions and suspensions is applied on calcined product followed by drying and calcination.
EFFECT: increased specific surface; enhanced heat resistance of carrier.
8 cl, 1 tbl, 5 ex
FIELD: chemical industry; methods of production of zirconium oxides
SUBSTANCE: the invention is pertaining to the field of chemical industry, in particular, to the methods of obtaining of zirconium oxide for production of the catalytic agents used, for example, in the reactions of the organic synthesis. The invention presents the method of obtaining of zirconium oxide for production of the catalytic agents, which includes the operations of dissolution of the zirconium salt in water, treatment of the solution with the alkaline reactant, settling of the metals hydroxides, filtration, separation of the mother-liquor from the settlings, the settlings water flushing, its drying, calcination and granulation and-or granulation by molding. At that dissolution of the source zirconium chloride and-or zirconium oxychloride is conducted in the sodium chloride solution with concentration of 200-250 g/dc3 till reaching of the concentration of zirconium of 20-120 g/dc3. Settling of zirconium oxyhydrate is conducted by the adding the initial chloride solution in the solution of the sodium hydroxide with concentration of 20-80 g/dm3 up to reaching the suspension pH equilibrium value - 5-8. Then the suspension is filtered up to the zirconium oxyhydrate pasta residual humidity of 40-80 %. The mother chloride solution is separated from the settlings of zirconium oxyhydrate and again use it for dissolution of the next batch of zirconium chloride and-or zirconium oxychloride. The settlings of zirconium oxyhydrate are subjected to drying at 80-100°C within 2-6 hours, then the dry settlings are suspended in the water at the ratio of liquid to solid L:S = (5-10 :1, the suspension is filtered, the sediment on the filter is flushed by water, the chlorides are wash off up to the residual concentration of ions of chlorine in the flush waters of 0.1-0.5 g/dm3, divided into 2 parts, one of which in amount of 60-80 % is subjected to drying and calcinations at the temperatures of 300-600°C, and other part in amount of 20-40 % is mixed with the calcined part of the settlings and subjected to granulation by extrusion at simultaneous heating and dehydration of the damp mixture of zirconium oxide and zirconium oxyhydrate with production of the target product. The technical result of the invention is improvement of quality of the produced zirconium oxide for production of the catalytic agents due to provision of the opportunity to use ZrO2 for the subsequent production of the various catalytic agents of the wide range of application and thereby improving the consumer properties of the produced production.
EFFECT: the invention ensures improvement of the quality of the produced zirconium oxide for production of the catalytic agents with improved consumer properties.
FIELD: technology for silicium dioxide production useful as additive for polymer reinforcement.
SUBSTANCE: claimed method includes silicate reaction with acidifying agent to produce silicium dioxide slurry separation and drying of said slurry, wherein reaction is carried out according to the next steps: i) providing base aqueous solution with pH from 2 to 5, preferably from 2.5 to 5; ii) simultaneous addition silicate and acidifying agent to said base solution maintaining solution pH from 2 to 5, preferably from 2.5 to 5; iii) addition silicate only without acidifying agent to produce pH from 7 to 10, preferably from 7.5 to 9.5; (iv) simultaneous addition silicate and acidifying agent to reaction medium to maintain pH from 7 to 10, preferably from 7.5 to 9.5; (v) addition acidifying agent only without silicate to produce reaction medium pH below 6. Obtained high structured silicium dioxides have the next characteristics: CTAB specific surface (SCTAB) is 40-525 m2/g; BET specific surface (SBET) is 45-550 m2/g; width Ld ((d84-d16)/d50) of particle size distribution measured by XDC grading analysis after ultrasound grinding is at least 0.92; and such pore distribution that V(d95-d50)/V(d5-d100) is at least 0.66.
EFFECT: improved material for polymer reinforcement.
FIELD: production of carbon carrier for catalysts.
SUBSTANCE: proposed method includes heating of moving layer of granulated furnace black used as backing, delivery of gaseous or vaporous hydrocarbons into soot layer followed by their thermal decomposition on soot surface forming layer of pyrocarbon at forming of layer of pyrocarbon and activation of material compacted by pyrocarbon at temperature of 800-900°C and unloading of finished product. Granulated furnace black at specific surface of 10-30 m2/g and adsorption rate of 95-115 ml/100 g is used as backing for compacting with pyrocarbon. Then, product is subjected to activation for obtaining total volume of pores of 0.2-1.7 cm3/g. Black is compacted by pyrocarbon at two stages: at first stage, granulated black is compacted to bulk density of 0.5-0.7 g/cm3, after which material is cooled down and screened at separation of fraction of granules of 1.6-3.5 mm; at second stage, this fraction is subjected to repeated pyrolytic compacting to bulk density of granules of 0.9-1.1 g/cm3.
EFFECT: enhanced economical efficiency; increased productivity of process.