Gasoline fraction hydrotreatment and a method for preparation thereof
FIELD: petroleum processing and catalysts.
SUBSTANCE: field of invention is production of catalysts for catalytic hydrotreatment (desulfurization) of gasoline fractions, e.g. straight-run gasoline. Herein disclosed is block-type high-porosity cellular catalyst for hydrotreatment of straight-run gasoline having porosity at least 90-93% and microporosity up to 30%, average pore size being ranging from 0.5 to 2.0 μm. Catalyst consists of α-alumina-based carrier and active catalyst portion containing sulfated zirconium dioxide and metallic palladium in concentration 0.5-0.9 wt %. Catalyst preparation method is also claimed and is as follows. Carrier is prepared from reticular polyurethane foam and impregnated with slurry containing more than 30 wt % α-alumina, after which calcined at 1300-1500°C, impregnated with water-soluble zirconium salts, dried at 100-200°C, calcined at 450-950°C, treated with 5-10% sulfuric acid, dried, calcined at 500-550°C, treated with palladium nitrate, dried, and calcined at 400-450°C, whereupon palladium oxide is reduced to metallic palladium.
EFFECT: lowered pressure and temperature of hydrotreatment process, considerably reduced process duration, lowered sulfur level in straight-run gasoline due to developed surface of catalyst, and prevented crumbling and loss of catalyst due to cellular structure and high strength.
The invention relates to the refining and petrochemical industries and can be used, in particular, in the production of a catalyst for catalytic hydro-desulfurization) gasoline fractions, such as gasoline.
Known allocable(Nickel)molybdenum catalyst for Hydrotreating petroleum distillates and the method of its preparation (A.S. USSR №1557742, CL 01J 37/00, 23/88), including separate precipitation of sodium aluminate acid at room temperature and the boiling, the subsequent mixing of modifications of aluminum hydroxide, hot and cold deposition in a specific mass ratio, leaching, extrusion molding, drying and calcination of the obtained extrudates of alumina, impregnated alumina ammonium solution of salts of cobalt or Nickel and molybdenum, subsequent drying and calcination of the resulting catalyst in the temperature range 50...600°C.
The disadvantages of using such a catalyst in the Hydrotreating process of petroleum distillates such as gasoline, are high pressure (3.0 MPa) and temperature (340° (C) Hydrotreating process, the duration of the Hydrotreating process (24 hours), high sulfur content in hydrogenase (straight run gasoline), equal to 1.4...2.5 mg/kg
The closest in technical the coy nature of the claimed catalyst is (a patent of the Russian Federation, No. 2232047, CL 7 01J 21/04, 23/62, 23/656, 27/13, bull. No. 19, 10.07.2004) for catalytic reforming of gasoline fractions containing platinum, chlorine and the promoter is rhenium or tin, distributed on the surface of the carrier, consisting of a composition of bulk carbonaceous oxynitride, surface oxychloride and gamma-aluminum oxide, and the method of its preparation, which includes the following stages: peptization powder pseudoboehmite of aluminum hydroxide; granulating plastic paste (or pseudosasa) a carrier; drying and calcining the granules (extrudates or beads); coating the surface of the carrier compounds active ingredients: platinum (0,3% wt.), promoter (rhenium or tin), chlorine; heat treatment of the catalyst by drying and calcination in air flow). Before testing, the catalyst is reactivated by hydrogen at a temperature of 450...500°C, pressure of 1.0 MPa, the flow of hydrogen from 66.7 l/h for 4...5 hours.
The disadvantages of the catalyst can include: exposure of extrudates destruction, the complexity of the regeneration of granules (extrudates), increased hydraulic resistance of the granular layer, etc.
The technical result, which is aimed by the invention, is to develop a catalyst and the method of its preparation, it achieves a significant reduction in the content of the series is in straight-run gasoline, reducing the length of the Hydrotreating process, reducing the pressure and temperature of the Hydrotreating process, preventing the destruction of the catalyst, increasing the service life of the catalyst.
To achieve the technical result of the proposed catalyst and its preparation method.
Catalyst - block high porous foam with a porosity of not less than 90...93%, with mikroporistogo up to 30%, an average pore size of 0.5 to 2.0 μm, consisting of a carrier-based α-aluminium oxide and the active portion of the catalyst containing sulfated Zirconia and metal palladium with a mass content of 0.5...0.9 percent.
The method of preparation of such a catalyst is as follows. Highly porous cellular carrier for catalyst made from open-celled polyurethane foam, soaking the last slip, containing more than 30% wt. α-aluminium oxide. Then dried at a temperature of 100...200°and calcined at a temperature of 1300...1500°C. a highly porous carrier contains more than 90% α-aluminium oxide. For the development of the catalyst surface on the carrier causing the active substrate of oxides of metals of group IV of the Periodic table of Mendeleev, for example zirconium dioxide. For this purpose, the carrier is impregnated with solutions of water soluble salts of zirconium, for example chloride C is ranila or nitrate Zirconia, or a mixture of tetraethoxysilane with isopropyl alcohol, then dried at a temperature of 100...200°and calcined in the temperature range 450...950°C. the Content of zirconium oxide in the catalyst is 4...10% wt.
The samples treated with a solution of 5...10% sulfuric acid, dried, calcined at a temperature of 500...550°C, treated with a solution of palladium nitrate, dried and calcined at a temperature of 400...450°, restore the palladium oxide to palladium metal with a mass content of 0.5...0.9% wt.
The method of preparation of a new catalyst and its efficiency in the use process of hydro-desulfurization) gasoline confirmed by the following examples.
Preparation of open-celled polyurethane foam is made in the form of a cylinder with a diameter of 50 mm and a height of 50 mm, impregnated with a slurry containing more than 30% wt. α-aluminium oxide, method for cyclic compression and stretching, dried at a temperature of 100...200°and calcined at a temperature of 1300...1500°C. the Resulting highly porous carrier contains more than 90% α-aluminium oxide. The carrier impregnated with 15% NaCl Zirconia, maintained at a temperature of 950°C for one hour. The content of zirconium oxide in the catalyst is 7.5% wt.
Then the carrier with the active padlock the th Zirconia is treated with a palladium nitrate solution (5% wt.), dried at a temperature of 120°C, calcined at a temperature of 400...450°, restore the palladium oxide to palladium metal.
In a heated reactor, which is a cylindrical vessel with an inner diameter of 50 mm, made of stainless steel, pour 30 ml of gasoline with a sulfur content of 440 ppm. Block a highly porous honeycomb catalyst containing zirconium dioxide, and 0.9% wt. metal palladium by weight 23 g, with a porosity of 90-93%, mikroporistogo up to 30%, is placed in the middle part of the reactor, providing its immobility. The reactor is fixed on the rocking chair, capable of producing the number of oscillations is equal to 120-160 min-1. Keep the temperature equal to 200°With, in the reactor by the flow of the coolant in the jacket of the reactor from thermostat. The Hydrotreating gasoline is carried out at a pressure of 1 MPa for 4 to 5 minutes. From the reactor is unloaded straight-run gasoline with a sulfur content equal to 51 ppm.
The Hydrotreating gasoline is performed at a pressure of 1.5 MPa for 4 to 5 minutes. From the reactor is unloaded straight-run gasoline with a sulfur content equal to 45 ppm.
The Hydrotreating gasoline is performed at a pressure of 2.0 MPa for 4 to 5 minutes. From the reactor is unloaded straight-run gasoline with a sulfur content equal to 39 ppm.
Preparation of open-celled polyurethane foam technology is prepared in the form of a cylinder with a diameter of 50 mm, and a height of 50 mm, impregnated with a slurry containing more than 30% wt. α-aluminium oxide, method for cyclic compression and stretching, dried at a temperature of 100...200°and calcined at a temperature of 1300...1500°C. the Resulting highly porous carrier contains more than 90% α-aluminium oxide. Then the carrier is impregnated with 15% NaCl Zirconia, maintained at a temperature of 950°C for one hour. The content of metal oxide (Zirconia) in the catalyst is 7.5% wt.
Received the sample carrier with the active substrate is treated with a solution of 10% sulfuric acid at room temperature, using the immersion technique with subsequent swelling of the excess acid without any outside influence, dried and calcined at a temperature of 500...550°C.
Then the carrier with the active backing of sulfated Zirconia is treated with a palladium nitrate solution (5% wt.), dried at a temperature of 120°C, calcined at a temperature of 400...450°, restore the palladium oxide to palladium metal.
In a heated reactor pour 30 ml of gasoline with a sulfur content of 440 ppm. Block a highly porous honeycomb catalyst containing 0.5 wt.%. metallic palladium on the sulfated Zirconia, weight 23 g, with a porosity of 90-93%, mikroporistogo up to 30%, is placed in the middle is part of the reactor. Maintain the reaction temperature being 230°With, in the reactor by the flow of the coolant in the jacket of the reactor from thermostat. The Hydrotreating gasoline is performed at a pressure of 1.0 MPa, for 4 to 5 minutes. From the reactor is unloaded straight-run gasoline with a sulfur content of 6.7 ppm.
Example 3. Analogous to example 2.
In a heated reactor pour 30 ml of gasoline with a sulfur content of 440 ppm. Block a highly porous honeycomb catalyst containing 0.5 wt.%. metallic palladium on the sulfated Zirconia, weight 23 g, with a porosity of 90-93%, mikroporistogo up to 30%, is placed in the middle part of the reactor. Maintain the reaction temperature equal to 220°With, in the reactor by the flow of the coolant in the jacket of the reactor from thermostat. The Hydrotreating gasoline is performed at a pressure of 1.0 MPa for 4 to 5 minutes. From the reactor is unloaded straight-run gasoline. The analysis showed the absence of sulfur straight-run gasoline.
In all the examples performed after the test there was no erosion of the block highly porous honeycomb catalyst, this can be judged by transparency paged product. After a process of Hydrotreating gasoline block highly porous honeycomb catalyst is subjected to regeneration. The number of regenerations - more than 50. Block of the honeycomb catalyst has fur the systematic crushing strength, 0.5...2.0 MPa, and its hydraulic resistance in two, three times less than the hydraulic resistance of the granular layer.
The use of a block of the honeycomb catalyst in the Hydrotreating process of gasoline reduces the sulfur content in straight-run gasoline to ten ppm or less, reduces the duration of the Hydrotreating process dozens of times, reducing the process pressure is 1.5 to 2.0 times, reduces the process temperature in 1.5 times and increases the service life of the catalyst is 1.5 times or more.
The process of Hydrotreating gasoline fractions, in particular gasoline, progressing only when sharing sulfated Zirconia and metal palladium.
Liquid-phase Hydrotreating gasoline fractions, in particular gasoline, carried out in a reactor with a reaction zone filled with highly porous block of the honeycomb catalyst. Block highly porous cellular material (α-Al2About3) with a porosity of not less than 90...93%, mikroporistogo up to 30%, is used as the catalyst carrier has a high Aero - and hydroponically, has a higher coefficient of external mass transfer compared to extrudates.
1. A catalyst for Hydrotreating gasoline fractions containing noble metal distributed on the surface but is of Italia, includes aluminum oxide, characterized in that it comprises a modular porous media with porosity of not less than 90...93%, with mikroporistogo up to 30%, manufactured on the basis of α-aluminium oxide and supported on a carrier of the active part of the catalyst containing sulfated Zirconia and metal palladium with a mass content of 0.5...0.9 percent.
2. The method of preparation of the catalyst according to claim 1, which includes stages of cooking, drying in the temperature range 100...200°and annealing the substrate, applying to the surface of the carrier of the active component in the form of a noble metal, drying and calcination of the catalyst and recovery of its hydrogen, characterized in that the carrier is made from open-celled polyurethane foam, impregnated with a slurry containing more than 30% of the mass α-aluminium oxide, calcined at a temperature of 1300...1500°C impregnate the carrier with water soluble salts of zirconium, dried at a temperature of 100...200°C, calcined at temperatures up to 950°With handle 5...10%sulfuric acid, dried, calcined at a temperature of 500...550°C, is treated with a palladium nitrate solution, dried, calcined at a temperature of 400...450°C, followed by reduction of palladium oxide to palladium metal.
FIELD: oil refining industry and petrochemistry; hydrorefining of petroleum distillates.
SUBSTANCE: hydrorefining of petroleum distillates is carried out at elevated temperature and increased pressure in presence of catalyst containing carrier - highly porous cellular material on base of aluminum α-oxide modified by aluminum γ-oxide or sulfated zirconium dioxide; used as active component is palladium or palladium modified by palladium nano-particles or palladium in mixture with zinc oxide in the amount of 0.35-20.0 mass-%. The process is carried out at temperature of 150-200°C and pressure of 0.1-1.0 Mpa.
EFFECT: enhanced efficiency; facilitated procedure; possibility of hydrorefining of gasoline and diesel distillates.
2 cl, 1 tbl
FIELD: desulfurization and hydrogenation catalysts.
SUBSTANCE: invention relates to preparing hydrodesulfurization and dearomatization catalysts useful in processes of deep purification of motor fuels from sulfur-containing compounds and aromatics. A sulfur-resistant catalyst is provided including active component deposited on porous inorganic support including montmorillonite or alumina and characterized by that support is composed of zeolite H-ZSM-5 with Si/Al atomic ratio 17-45 (80-65%) and montmorillonite or alumina (20-35%), while active component is platinum or palladium, platinum and palladium in quantities, respectively, 0.2-2.0, 0.2-1,5. and 0.4-0.2% based on the total weight of catalyst. Described is also catalyst comprising platinum (0.2-2.0%) or palladium (0.2-1.5%), or platinum and palladium (0.4-2.0%) supported by Ca or Na form of montmorillonite, and also catalyst with the same active components supported by zeolite H-ZSM-5 with Si/Al atomic ratio 17-45.
EFFECT: increased sulfur-caused deactivation resistance of catalyst at moderate temperatures and under conditions efficiency in hydrodesulfurization and aromatics hydrogenation processes.
8 cl, 4 tbl, 30 ex
FIELD: manufacture of substrate with layer of carbon-alloyed titania acting as photo-catalyst sensing visible light.
SUBSTANCE: method comprises steps of heat treatment in order to provide temperature of surface of substrate having at least surface layer containing titanium, titanium alloy or titanium oxide in range 900 -1500°C. Heat treatment of substrate surface is realized by directing flame of burning gas including, mainly hydrocarbon directly on substrate surface or in atmosphere of gaseous combustion products of gas containing mainly hydrocarbon in order to form carbon-alloyed titania layer. Heat treatment of substrate surface may be realized in gaseous atmosphere containing mainly hydrocarbon or hydrocarbon with air or hydrocarbon with oxygen.
EFFECT: possibility for producing substrate with layer of carbon-alloyed titania characterized by increased useful time period, high hardness, resistance against scratching, improved wear resistance, chemical stability and thermal stability.
20 cl, 2 tbl, 9 dwg, 16 ex
FIELD: petrochemical processes and catalysts.
SUBSTANCE: middle distillates are obtained, in particular, from paraffin charge prepared by Fischer-Tropsch synthesis wherein hydrocracking/hydroisomerization catalyst is utilized including at least one hydrocracking/hydroisomerization element selected from group constituted by group VIII metals, non-zeolite silica-and-alumina-based carrier (more than 5% and less than or equal to 95% SiO2) and having: average pore size measured by mercury porometry within a range 20 to 140 Å; total pore volume measured by mercury porometry 0.1-0.6 mL/g; total pore volume measured by nitrogen porometry 0.1-0.6 mL/g; specific surface BET between 100 and 550 m2/g; pore volume for pores with diameter above 140 Å measured by mercury porometry less than 0.1 mL/g; pore volume for pores with diameter above 160 Å measured by mercury porometry less than 0.1 mL/g; pore volume for pores with diameter above 200 Å measured by mercury porometry less than 0.1 mL/g; pore volume for pores with diameter above 500 Å measured by mercury porometry less than 0.01 mL/g; x-ray diffraction pattern containing at least principal characteristic lines of at least one transition aluminum oxides (alpha, rho, chi, eta, kappa, teta, and delta). Processes of obtaining middle distillates from paraffin charge obtained ny Fischer-Tropsch synthesis (options) using above indicated procedure are also described.
EFFECT: improved catalytic characteristics in hydrocracking/hydroisomerization processes and improved quality and yield of middle distillates.
18 cl, 6 dwg, 3 tbl, 5 ex
FIELD: production of ceramic articles, such as tiles, brick, clinker brick or ceramics for face walls with self-cleaning surfaces.
SUBSTANCE: ceramic article is characterized by porous oxido-ceramic coat which is photocatalytically active and contains TiO2; its specific surface ranges from 25 m2/g to 200 m2/g. TiO2 is obtained by flame hydrolysis of TiCl4 in form of highly dispersed powder. Thickness of layer of coat ranges from 50 nm to 50 mcm. Layer with cambers may be located between surface of material of base and photocatalytically active coat. It is preferably to have superhydrophobic surface of coat. Method of making such molded ceramic article includes preparation of suspension of photocatalytically active oxido-ceramic powder, application of this suspension on base and hardening of layer thus obtained by means of drying or roasting. For obtaining superhydrophobic surface, polysiloxane solution is added to starting suspension.
EFFECT: enhanced self-cleaning ability of articles.
FIELD: special-destination materials.
SUBSTANCE: invention provides multifunctional material with carbon-alloyed titanium oxide layer exhibiting activity of photocatalyst responding to visible light. Material has at least one surface layer including carbon-alloyed titanium oxide layer wherein carbon forms Ti-C bonds. From this material, visible light-responding photocatalyst can be prepared.
EFFECT: achieved excellent durability, high hardness, and resistance to abrasion, wear, chemicals, and heat.
19 cl, 9 dwg, 2 tbl, 16 ex
FIELD: molding of ceramic articles, such as roofing tiles, brick, clinker brick or ceramics for front walls from oxidoceramic material of base with surfaces which are self-cleaning when sprinkled with rain or wetted.
SUBSTANCE: molded article has porous photocatalytic active coat which contains TiO2 or Al2O3 (aluminum oxide C) in combination with other oxides of metals, for example SiO2; its specific surface ranges from about 25 m2/g to about 200 m2/g. Average diameter of pores or capillaries of articles ranges from 0.1 to 5 mcm. At least one bossy layer may be placed in between oxidoceramic material of base and photocatalytic active coat. Surface of article may be waterproofed. Method of manufacture of article includes preparation of suspension of photocatalytically active material, application of this suspension on article for forming the required layer and hardening of this layer.
EFFECT: improved self-cleaning ability and wear resistance of articles.
44 cl, 3 tbl
FIELD: chemical industry; metallurgy industry; other industries; methods of production of the high purity ferric oxides.
SUBSTANCE: the invention is pertaining to the method of production of the high purity ferric oxides and may be used in production of the pigments and the catalysts at production of the high purity ferric oxides. The ferric oxides are produced by interaction of the metallic iron made in the form of the microball-shaped particles either the scrap, or the turning chips, which dimensions are such, that the area of their surface per one kg of iron and per one liter of the reaction medium makes more than 0.01 m2 with the being stirred water solution of the carboxylic acid having рКа from 0.5 up to 6 for the first carboxyl and capable to thermolysis in the open air at the temperature of from 200 up to 350°С into carbon dioxide and the water. The ratio between the moles of the carboxylic acid and g-atoms of the iron makes from 0.03 up to 1.5 and the mass ratio of the water/iron - from 1 up to 20, the microball-shaped particles are kept in the suspension by stirring. The produced carboxylate of the ferrum (II) is oxidized up to carboxylate of the ferrum (III) with the oxidant selected from oxygen, the oxygen-containing gaseous mixture and hydrogen dioxide. The earlier produced carboxylate of the ferrum (II) also may be exposed to the oxidizing. Then the carboxylate of the ferrum (III) is heated up in the open air till production of the oxides. The invention allows to increase the purity of the ferric oxides and productivity at their production.
EFFECT: the invention ensures the increased purity of the produced ferric oxides and productivity at their production.
9 cl, 12 ex
FIELD: carbon materials and hydrogenation-dehydrogenation catalysts.
SUBSTANCE: invention relates to improved crude terephthalic acid purification process via catalyzed hydrogenating additional treatment effected on catalyst material, which contains at least one hydrogenation metal deposited on carbonaceous support, namely plane-shaped carbonaceous fibers in the form of woven, knitted, tricot, and/or felt mixture or in the form of parallel fibers or ribbons, plane-shaped material having at least two opposite edges, by means of which catalyst material is secured in reactor so ensuring stability of its shape. Catalyst can also be monolithic and contain at least one catalyst material, from which at least one is hydrogenation metal deposited on carbonaceous fibers and at least one non-catalyst material and, bound to it, supporting or backbone member. Invention also relates to monolithic catalyst serving to purify crude terephthalic acid, comprising at least one catalyst material, which contains at least one hydrogenation metal deposited on carbonaceous fibers and at least one, bound to it, supporting or backbone member, which mechanically supports catalyst material and holds it in monolithic state.
EFFECT: increased mechanical strength and abrasion resistance.
8 cl, 4 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: petrochemical process catalysts.
SUBSTANCE: invention relates to molded particles having particular shapes. They can be used to prevent or considerably reduce contamination in catalyst beds operated in flows carrying contaminating materials, which results in loss of pressure within a bed. Oblong molded particles for catalysts and granulometric compositions contain three raised portions, each extending from central segment aligned from central longitudinal axis of particle and attached to central segment, while cross section of particle occupies area surrounded by outer frontiers of six circles surrounding central circle minus area of three alternate outer circles. Each of six outer circles has diameter ranging from 0.74 to 1.3 diameters of central circle and touches two neighboring outer circles, while three alternate outer circles are situated at equal distance from the central circle, have the same diameter, and are essentially in contact with central circle. These are the particles that are contained in protective layer. Method of reducing contamination or effect of contaminating precipitation in catalyst beds comprises contacting feedstock containing contaminating material with one or several layers of above-described particles. Disclosed are also method of converting organic feedstock, method for obtaining middle distillates from synthesis gas, and a method of converting hydrocarbons in particular of described particles.
EFFECT: considerably reduced catalyst-poisoning effect of contaminating materials contained in feedstock.
15 cl, 1 dwg, 1 tbl
FIELD: chemical industry; methods of production of the catalytic agents of photochemical reaction and sorbents-catalysts of heterogeneous photochemical processes.
SUBSTANCE: the invention is pertaining to the field of chemical industry and may be used in production of the catalytic agents of photochemical reaction and the sorbents-catalysts of heterogeneous photochemical processes of oxidizing of the harmful organic compounds. The precursor in the form of titanium tetraalcoxide and template of the organic nature are introduced into the water-organic dissolvent. The mixture of the reactants is intermixed up to formation of the sol and is kept till the final formation of the special structure. The gained reaction product is separated and treated removal of the template using calcifying or the extraction by the alcohol after preliminary hydrothermal treatment. In preferential version of the invention the water-alcohol dissolvent is additionally introduced with the salt of lanthanum. The invention allows to produce the reproducible sorbent-photocatalyst with the high attributes: the crystal phase of the anatase - no less than 30 mass %, a mean diameter of the pores - 2-16 nanometers, the specific surface - no less than 70 m2/g, does not contain the non-desirable impurities.
EFFECT: the invention ensures production of the reproducible sorbent-photocatalyst with the high attributes of thee crystal phase of the anatase, the effective diameter of the pores, the specific surface at absence of the non-desirable impurities.
7 cl, 68 ex
FIELD: oil and fat industry and technology.
SUBSTANCE: invention relates to an improved method for hydrogenation of vegetable oils and distilled fatty acids. Method involves the hydrogenation reaction that is carried out on a catalyst stationary layer representing crystallites of active palladium applied on surface of carbonic material wherein mesoporous graphite-like material is used as carbonic material with granules size 0.5-6.0 mm but preferably 3.0-6.0 mm, specific surface 100-450 m2/g, average size of mesopores in the range from 40 to 400 Å, total volume of pores 0.2-0.6 cm3/g and part of mesopores in the total volume of pores 0.6, not less. Palladium crystallites in volume of carbonic material are distributed by so manner that the distribution maximum values of active component are in distance from external granule surface corresponding to 1-30% of its radius and in the content of applied palladium in the range from 0.5 to 2.0 wt.-%. Invention provides the high hydrogenation rate of raw in production of technical sorts of hydrogenated fats and high stability of product.
EFFECT: improved method of hydrogenation.
2 cl, 1 dwg, 3 tbl, 16 ex
FIELD: gas treatment catalysts.
SUBSTANCE: method of preparing exhaust gas treatment catalyst comprises: (i) providing at least one type of compounds selected from carboxylic acids having hydroxy or mercapto group and number of carbon atoms from 2 to 20; dicarboxylic acids with 2 or 3 carbon atoms; and monocarboxylic acids with 1-20 carbon atoms; (ii) adding at least one compound selected from above group to aqueous sulfate solution including Al and rare-earth element; (iii) complete evaporation of aqueous carboxylic acid to produce carboxylic acid-based polymer complex; (iv) heating the latter to temperature no higher than 1000°C to form aluminum oxide; and (v) depositing palladium on thus obtained aluminum oxide. Described are also aluminum oxide as carrier for palladium wherein aluminum oxide is represented by PrAlO3 or NdAlO3 as well as exhaust gas treatment catalyst prepared by above-described method, wherein palladium is supported by LnAlO3 (Ln: rare-earth metal), and equipment for exhaust gas treatment catalyst.
EFFECT: improved quality of running engine event at low temperature during starting or idling.
6 cl, 3 dwg, 3 tbl, 10 ex