Catalyst for oxidative treatment of gases and a method for preparation thereof

FIELD: gas treatment catalysts.

SUBSTANCE: invention concerns environmental protection area and aims at neutralizing toxic components of emission gases and, more specifically, related to a method of preparing catalyst for oxidative treatment of gases polluted by hydrocarbons and carbon monoxide. Invention provides catalyst supported by stainless steel containing 0.05-0.15 wt % ruthenium or ruthenium in the same quantity combined with platinum or palladium in quantity not exceeding 0.05 wt %. Catalyst preparation method is also described.

EFFECT: increased degree of removal of hydrocarbons, increased strength of catalyst, and reduced price of catalyst.

2 cl, 2 tbl

 

The invention relates to the field of environmental protection from toxic components of exhaust gases, namely, catalyst, method for preparing a catalyst for the oxidative purification of gases from hydrocarbons and carbon monoxide.

The use of the catalysts for deep oxidation of hydrocarbons and carbon monoxide noble metals such as platinum and palladium [Popova N.M. Catalytic treatment of gas emissions from industrial plants. M.: Chemistry, 1991. P.47-54; alhazov YEAR, Margolis L.Y. Deep catalytic oxidation of organic substances. M.: Chemistry, 1985. P.á192; Chemical technology. 2001. No. 3. P.9-17], provides a high activity at low temperatures (250-400° (C), thermal stability and long operating life of the catalyst. A significant disadvantage of these catalysts is the high cost, determined by the price they are composed of expensive platinum and palladium.

Known catalysts containing ruthenium or a combination of ruthenium and platinum, alumina [RU, patent No. 2001111013, CL B01D 53/62, B 01 J 23/38, 20.05.2003] or graphite-like carbon media [RU, patent No. 2191070, CL B01J 23/40, 23/46, 21/18, 37/02, B01D 53/62, SW 31/20, 20.10.2002] for the purification of hydrogen-containing gases from carbon monoxide.

The application of these catalysts is limited to one process of oxidizing gas purification.

Closest to the present invention is a catalyst for oxidation of hydrocarbon gases containing platinum on the media, representing the oxidized stainless steel, in a ratio of components, wt.%: Pt 0,02-0,11, medium of rest [RU, patent No. 2063804, CL B01J 23/89, 37/03]. The catalyst through the use of a metal carrier has a mechanical strength and shows high activity in the process of complete oxidation of hydrocarbons at temperatures of 250-400°C.

The lack of a catalyst in that it contains expensive platinum, which greatly increases its cost.

Closest to the present invention is a method of preparation of the catalyst for oxidation of hydrocarbon gases [RU, patent No. 2063804, CL B01J 23/89, 37/03], which consists in the fact that the metal carrier, representing the crushed chips in stainless steel, pre-occiderit, and then put platinum by immersing the carrier in an aqueous solution containing 4,5·10-4-6,0·10-4mol/l [Pt(NH3)4]Cl2and 0.005 mol/l potassium hydroxide, at a temperature of 170-210°in a confined space within 150-180 min and the ratio of bulk volume of the medium to the volume of solution equal to 1:13-1:14.

The method cannot be used for the preparation of the proposed catalyst. The disadvantage is in the use of chemical compounds costly platinum, that significantly increases the cost of the resulting catalyst.

The basis of the invention is the development of a catalyst with a metal carrier for the oxidizing gas purification and method of its preparation, providing a high degree of purification at low temperatures, high mechanical strength and low cost of the catalyst.

The task is solved in that in the proposed catalyst comprising a noble metal and oxidized stainless steel, it is new that the catalyst contains ruthenium in amounts of 0.05 to 0.15 wt.% or ruthenium in the same amount in combination with one of the metals: platinum or palladium in an amount not exceeding 0.05 wt.%.

In the preparation method of catalyst for the oxidative purification of gases by immersing the pre-oxidized stainless steel in an aqueous solution containing 0.005 mol/l potassium hydroxide and ammonium complex of a platinum metal and located in a confined space at a temperature of 170-210°150-180 min, what is new is that the used aqueous solution contains at least one ammonium complexes of ruthenium, for example, [Ru(NH3)6]Cl2or [Ru3O2(NH3)14]Cl6or with a ruthenium complex containing a complex of one of the metals: platinum, for example, [Pt(NH3)4]Cl2or palladium, for example the er [Pd(NH 3)4]Cl2. The concentration of the complexes and the ratio of bulk volume of the medium to the volume of the solution provide the desired content of platinum metals in the catalyst.

The method of preparation of the catalyst is carried out as follows. Media in the form of crushed chips grade stainless steel 18CR10NITI or HNT pre occiderunt. The method of oxidizing the stainless steel matches the prototype of [RU patent No. 2063804, CL B01J 23/89, 37/03].

Oxidized stainless steel is placed in a quartz or Teflon autoclave with an aqueous solution containing 0.005 mol/l potassium hydroxide and one of the ammonia complexes of ruthenium [Ru(NH3)6]Cl2or [Ru3O2(NH3)14]Cl6. To obtain the bimetallic ruthenium-platinum or ruthenium-palladium catalysts in the solution is further added ammonium platinum complex [Pt(NH3)4]Cl2or palladium [Pd(NH3)4]Cl2respectively. The concentration of the complexes are listed in table 1. The ratio of the bulk volume of the medium to the volume of the solution is 1:10-1:11. The solution is rinsed for 20-30 min with argon or nitrogen to remove from the system of molecular oxygen, after which the autoclave is pressurized. The process is conducted at a temperature of 180-200°within 150-180 min in an autoclave with stirring. At the end of p is otessa the finished catalyst is removed from the solution, washed with distilled water and dried in air at room temperature. Removing oxygen from the system is a prerequisite for obtaining high-quality coatings, as in his presence when thermolysis along with metallic ruthenium, platinum and palladium formed their hard-soluble compounds of variable composition. These intervals of duration and temperature of the process, the concentration of potassium hydroxide in solution are complete selection of platinum metals from solutions of their ammonium complexes and preservation of media. They are determined experimentally.

Specific examples of the preparation of the catalysts shown in table 1.

Tests of the prepared samples was performed by gas chromatography installation: micromodules isothermal reactor (volume of the reaction zone catalysis of 1.5-3.5 cm3) with the diffusion cell input googlepagerank mixture, the device chromatograph LHM-80 (steel Packed column 2 m × 3 mm, filled with Chromaton N-super with NF 5% SE-30 column temperature 70°C, carrier gas : nitrogen). The raw material used n-hexane. The process conditions: 1.5 to 3.5 cm3the test contact was placed in the reactor, the reaction temperature is in the range of 300-500°C, the feed rate of the raw material vapor mixture of 250 ml/min, the concentration of n-hexane in the original p is novastoshnah mixture was 2-3,5 g/m 3. The degree of oxidation of n-hexane was calculated as the ratio of the peak heights of the hydrocarbon on the chromatogram before and after the oxidation reaction and expressed in %.

The results of the tests of the prepared catalysts in the oxidation of n-hexane are given in table 2.

Based on data from table 2, we can say that the catalysts obtained by the above method, are active in the processes of complete oxidation of hydrocarbons (n-hexane) at a temperature of 300-500°and the activity is not inferior to the catalyst of the prototype.

The cost of the proposed catalyst for the oxidative purification of gases with the carrier of oxidized stainless steel is reduced in comparison with platinum catalyst of the prototype due to partial or complete replacement of expensive platinum and palladium at a cheaper ruthenium, while retaining a high degree of purification of gases from hydrocarbons and high mechanical strength of the catalyst.

Table 1
The results of the deposition of ruthenium and ruthenium together with platinum or palladium on oxidized stainless steel
SampleContent, wt.%Concentration in solution, mol/l
ENP Pd[Pt(NH3)4]Cl2[Pd(NH3)4]Cl2complex of ruthenium
10,05----[Ru(NH3)6]Cl2; 1,6·10-3
20,12----[Ru(NH3)6]Cl2; 2,9·10-3
30,07----[EN3O2(NH3)14]Cl6; 4,7·10-4
40,15----[EN3O2(NH3)14]Cl6; 1,1·10-3
50,060,04-8,7·10-4-[EN3O2(NH3)14]Cl6; 5,6·10-4
60,130,01-2,5·10-4-[EN3O2(NH3)14]Cl6; 9,5·10-4
70,140,03-4,0·10-4-[Ru(NH3)6]C 2; 3,0·10-3
80,050,051,5·10-3[EN3O2(NH3)14]Cl6; 5,4·10-4
90,150,031,0·10-3[EN3O2(NH3)14]Cl6; 1,1·10-3
the placeholder-0,0536,0·10-4--

Table 2
The results of the complete oxidation of n-hexane on the catalysts
SampleContent, wt. %The degree of conversion, % at a temperature of, °
ENPtPd300400500
10,05--71,799,299,5
20,12--76,498,799,3
30,07--71,4 98,899,4
40,15--of 97.8the 98.999,3
50,060,04-94,7the 98.9the 98.9
60,130,01-of 97.8the 98.999,2
70,140,03-90,999,399,5
80,05-0,0592,998,899,4
90,15-0,0386,6of 99.199,2
the placeholder-0,053-99,499,7-

1. The catalyst for the oxidative purification of gases containing a platinum group metal and oxidized stainless steel, characterized in that the catalyst contains ruthenium in amounts of 0.05 to 0.15 wt.% or ruthenium in the same amount in combination with one of the metals: platinum or palladium in an amount not exceeding 0.05 wt.%.

2. The preparation method of catalyst for the oxidative purification of gases by immersing the pre-oxidized stainless is Tali in aqueous solution, containing 0.005 mol/l potassium hydroxide and ammonium complex of a platinum metal, and being in a confined space at a temperature of 180-200°at 150-180 min, wherein the pre-oxidized stainless steel is dipped in a solution of one of the ammonia complexes of ruthenium, or in a solution of a complex of ruthenium and ammonium complex of one of the metals: platinum or palladium, concentration and ratio of the bulk volume of the medium to the volume of the solution, providing a catalyst according to claim 1.



 

Same patents:

FIELD: petroleum processing.

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EFFECT: expanded catalyst preparation possibilities.

2 cl, 5 tbl, 4 ex

FIELD: chemical industry; petrochemical industry; other industries; methods of production of the catalysts of hydrogenation of arenes.

SUBSTANCE: the invention is pertaining to the field of the catalytic chemistry, in particular, to production of the catalysts used for dearomatization of the diesel fractions. The invention presents the catalyst for hydrogenation of the arenas containing platinum the carrier, which aluminum oxide containing of no more than 500 ppm of impurities in the mixture with the crystalline mesosculiferous aluminosilicate with the molar ratio of Si/Al equal to 10-60 at the following contents of the ingredients (in mass %): platinum (Pt) - 0.15-0.60; aluminum oxide (AI2O3) - 59.85-94.4; crystalline mesoosculiferous aluminosilicate (AlxSiyOz) - 5-40, where х = 0.017 - 0.1; y = 1; z = 2.026 - 2.15. The invention also presents the method of preparation of the catalyst of hydrogenation of the arenes providing for production of the carrier, deposition of platinum on the carrier by the method of the competitive impregnation from the combined solution of the carrier from the joint solution of the chloroplatinic acid, acetic acid and hydrochloric acid the subsequent drying, and burning, differing that the carrier is produced by mixing of the powdery aluminum oxide containing of no more than 500 ppm of the impurities, and the crystalline mesoosculiferous aluminosilicate AlxSiyOz, (where х = 0.017 - 0.1; y = 1; z = 2.026 - 2.15), with the molar ratio molar ratio of Si/Al equal to 10-60, humidification of the produced mixture and the jellification by the 1.5 - 5 % solution of the nitric acid. The technical result of the invention is the increased hydrogenating activity of the catalyst.

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3 cl, 2 tbl, 4 ex

FIELD: chemical industry; other industries; methods of production of the platinum catalysts.

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3 cl

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4 cl, 10 ex, 6 tbl, 2 dwg

FIELD: petroleum processing and petrochemical process catalysts.

SUBSTANCE: hydrofining catalyst is composed of, wt %: NiO 2.5-4.0, MoO3 8.0-12.0, Na2O 0.01-0.08, La2O3 1.5-4.0, P2O5 2.0-5.0, B2O3 0.5-3.0, and Al2O3 the rest. Preparation of the catalyst involves impregnation of sodium oxide-containing carrier with active components: nickel nitrate and ammonium paramolybdate solution followed by drying and calcination. In particular, sodium oxide-containing aluminum hydroxide is mixed with boric acid solution and nitric acid solution of lanthanum carbonate, resulting carrier is dried and calcined, after which impregnated with nickel nitrate and ammonium paramolybdate solution at pH 1.5-3.0 and temperature 40-80°C in presence of phosphoric acid.

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2 cl, 2 ex

FIELD: chemical industry; oil-refining industry; other industries; methods of production of the catalytic microporous fine-dispersed materials.

SUBSTANCE: the invention is pertaining to the method of production of the catalytic microporous fine-dispersed material, which is used in such processes, as purification of the oil fractions, purification of the sewage disposal, the catalytic conversion of the exhaust gases exiting from the combustion engines. The method allows to produce the catalytic microporous fine-dispersed material with the coating of the rare-earth metal oxide, in which the quantity of the metal oxide deposited on it is high without the risk for efficiency of the material. At that the rare-metal oxide is deposited on the outer surfaces of the indicated material and may be within the interval of 20-70 mass % with respect to with respect to the total equivalent content of the rare-earth metal oxide and the microporous fine-dispersed material. The method provides for the combination of the quantity of the colloid dispersion of the hydrate of the rare-earth metal oxide with the compatible microporous fine-dispersed material with formation of the suspension and the thermal treatment of the indicated suspension for the rare-earth metal oxide fixation on the outer surfaces of the indicated material. At that the indicated microporous fine-dispersed material has the average size of the pores less than 20 Å, and the indicated colloid dispersion has the particle size of the particles of not less than 20 Å. The invention also presents the catalytic free-loose fine-dispersed material with the rare-earth metal oxide coating containing the ceolite fine-dispersed material, the rare-earth metal oxide. At that the indicated ceolite fine-dispersed material has the average size of the pores less than the size of the particles of the indicated rare-earth metal oxide, and more than 20 mass % of the indicated rare-earth metal oxide is on the outer surfaces the indicated ceolite fine-dispersed material with respect to the total equivalent content of the rare-earth metal oxide and the ceolite. The ceolite free-loose fine-dispersed material having the high contents of the rare-earth metal oxide has the tendency to be the very stable material.

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31 cl, 11 ex, 3 tbl

FIELD: shift reaction catalysts.

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10 cl, 2 tbl, 2 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.

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2 cl, 1 tbl, 8 ex

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27 cl, 2 dwg, 7 tbl, 6 ex

FIELD: petrochemical process catalysts.

SUBSTANCE: invention relates to a method of preparing catalysts for dehydrogenation of paraffin hydrocarbons into corresponding olefin hydrocarbons. Method comprises impregnating thermochemically activated hydroargillite with chromium. alkali metal, titanium, and hafnium compound solutions, drying, and calcination at 700-800°C. Catalyst is molded during thermoactivation of hydrated thermochemically activated hydroargillite together with chromium, zirconium, alkali metal compounds and titanium, zirconium, and hafnium oxides. Catalyst contains (on conversion to oxides): 10-20% chromium (as Cr2O3), 0.5-3,5% alkali metal, and 0.05-5% sum of zirconium, hafnium, and titanium oxides, with balancing amount of alumina obtained from thermochemically activated hydroargillite as precursor, provided that oxide ratio Ti/Zr/Hf is (0.001-0.05):1:(0.01-0.3).

EFFECT: increased mechanical strength of catalyst, catalytic activity, selectivity, stability, reduced coking, and reduced yield of catalyst and yield of olefins.

5 cl, 1 tbl, 6 ex

FIELD: chemical industry; petrochemical industry; other industries; methods of production of the catalysts of hydrogenation of arenes.

SUBSTANCE: the invention is pertaining to the field of the catalytic chemistry, in particular, to production of the catalysts used for dearomatization of the diesel fractions. The invention presents the catalyst for hydrogenation of the arenas containing platinum the carrier, which aluminum oxide containing of no more than 500 ppm of impurities in the mixture with the crystalline mesosculiferous aluminosilicate with the molar ratio of Si/Al equal to 10-60 at the following contents of the ingredients (in mass %): platinum (Pt) - 0.15-0.60; aluminum oxide (AI2O3) - 59.85-94.4; crystalline mesoosculiferous aluminosilicate (AlxSiyOz) - 5-40, where х = 0.017 - 0.1; y = 1; z = 2.026 - 2.15. The invention also presents the method of preparation of the catalyst of hydrogenation of the arenes providing for production of the carrier, deposition of platinum on the carrier by the method of the competitive impregnation from the combined solution of the carrier from the joint solution of the chloroplatinic acid, acetic acid and hydrochloric acid the subsequent drying, and burning, differing that the carrier is produced by mixing of the powdery aluminum oxide containing of no more than 500 ppm of the impurities, and the crystalline mesoosculiferous aluminosilicate AlxSiyOz, (where х = 0.017 - 0.1; y = 1; z = 2.026 - 2.15), with the molar ratio molar ratio of Si/Al equal to 10-60, humidification of the produced mixture and the jellification by the 1.5 - 5 % solution of the nitric acid. The technical result of the invention is the increased hydrogenating activity of the catalyst.

EFFECT: the invention ensures the increased hydrogenating activity of the catalyst.

3 cl, 2 tbl, 4 ex

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 mixing carbon material with gaseous hydrocarbons at 750-1200°C until mass of carbon material increases by 2-2.5 times, after which resulting compacted material is oxidized, said initial carbon material being preliminarily demetallized carbon nanofibers.

EFFECT: increased sorption capacity of material.

1 tbl, 6 ex

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

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.

1 ex

FIELD: organic synthesis catalysts.

SUBSTANCE: invention is dealing with preparation of homogenous catalyst for production of acrylic acid esters according to metathesis reaction of malates with ethylene. Two variants of preparing catalyst are developed. In particular, catalyst of general formula , wherein A1, A2 represent chlorine, L dihydroimidazole ligand, R1, R2, R3, the same or different, are substituents selected from hydrogen, alkyl, trialkylsylyl, and alkoxy; and catalyst of formula are proposed. Use of these catalysts allows number of cycles of metathesis reaction of dialkyl malates with ethylene to be increased both under moderate temperature (about 50°C) conditions when reaction is carried out without distillation of product and at temperatures about 120°C when acrylate produced is distilled out of reaction mixture. Catalytic composition is further developed allowing not only number of reaction cycles but also catalyst lifetime to be increased. Such composition contains indicated catalyst and 2-isopropoxystyrene or its derivative at molar ratio 1:(5-500), respectively.

EFFECT: increased catalyst activity and lifetime.

7 cl, 4 tbl, 28 ex

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