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.

Example 1.

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.

Example 2.

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.

Example 3.

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.

Example 4.

The carbon carrier was obtained by the method of example 1. Differences: temperature seals soot - 300°C. Output process indicators presented in the table.

Example 5.

The carbon carrier was obtained by the method of example 2. Differences: temperature seals soot - 700°C. Output process indicators presented in the table.

Example 6.

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 materialThe seal of the source materialSorption activity, mg/g
The conversion of acetylene, %The output of carbon, g/lTo physico-mechanical effects After physico-mechanical effectsThe loss of sorption activity, %
The placeholder--˜100not determined-
For example 11000,271401353,6
For example 21000,231321255,3
For example 3890,151251158,0
In example 4100,051201099,2
For example, 51000,271401362,9
In example 6-0,171291188,5

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.


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21 cl, 3 tbl

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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.

1 ex

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.

3 ex