Method of preparation of catalyst for reforming of gasoline fractions

FIELD: methods of preparation of catalysts for reforming of gasoline fractions in oil producing and petrochemical industries for production of high-octane motor fuels, aromatic hydrocarbons and commercial hydrogen.

SUBSTANCE: proposed method includes vacuum treatment of carrier, recirculation through aqueous solution of hydrochloric and acetic acids under vacuum, recirculation of impregnating solution; solutions of chloro-platinous and rhenium acids are introduced into impregnating solution at constant rate, after which solution is subjected to drying and calcination; treatment of carrier with impregnating solution is carried out at three stages: at first and second stages, temperature of circulating impregnating solution does not exceed 30°C and at third stage its temperature is not below 70°C.

EFFECT: enhanced activity, selectivity and stability of catalyst; reduced usage of metals; reduction of wastes and losses of platinum and rhenium.

10 cl, 2 dwg, 1 tbl, 8 ex

 

The invention relates to methods for preparing catalysts for reforming of gasoline fractions used in the refining and petrochemical industry for the production of high octane motor fuels, aromatic hydrocarbons and technical hydrogen.

A known method of preparation of reforming catalysts with high activity and stability by treating the aluminum oxide first recirculation aqueous solution of hydrochloric acid or acetic acid, and then recycling the impregnating solution, which with constant speeds impose solutions of hexachloroplatinic and rhenium acid with a speed ratio of feed, equal to 0.47 to 0.9 per metals [SU 1127131, B 01 J 37/02, 23/64, 24.12.82,].

The disadvantage of this method is not sufficiently high activity, selectivity and stability of catalysts and substantial quantities of dust and crumbs catalyst formed in the process of "wetting" of aluminum oxide with an aqueous solution of hydrochloric and acetic acids. As a consequence, generates significant amounts of waste and loss of platinum from the catalyst crumbs.

Closest to the technical essence and the achieved effect to the proposed method is a method for preparing a catalyst for reforming of n-heptane, including degassing media, reci is qulatiy aqueous solution of muriatic or hydrochloric acid or acetic acid under vacuum, and then the recirculation of the impregnating solution, in which a constant speed is injected solutions of hexachloroplatinic or hexachloroplatinic and rhenium acid [SU 1284045, B 01 J 37/02, 23/64, 19.04.85,].

The disadvantages of this method are the low level, and especially selectivity, and stability of the catalyst. Output stable reformate (see table) with a content of aromatic hydrocarbons 65 wt.% is an 80.2 wt.%, and the rate of activity decline is 0.9% of aromatic hydrocarbons in the day.

The invention solves the problem of obtaining a catalyst with high activity, selectivity and stability, and reducing the consumption of metals in the preparation of the catalyst and reduce waste and losses of platinum and rhenium.

This task is achieved by the preparation method of the catalyst for reforming of gasoline fractions by vacuum media recirculation through the medium of an aqueous solution of muriatic or hydrochloric acid or acetic acid under vacuum, the recirculation of the impregnating solution, in which a constant speed is injected solutions of hexachloroplatinic and rhenium acids and handling media in three stages, with the first and second stages (cold soaking) circulating impregnating solution has a temperature of not more than 30°and in the third stage (the hot impregnation) circulating impregnating solution has a temperature of at least 70° C.

A distinctive feature of the proposed method is the treatment of media impregnating solution in three stages. In the first and second stages, the temperature of the impregnating solution to support no more than 30°With, thus achieving a uniform distribution of metals in the volume of the layer of the carrier and on the inner surface of the porous space of the individual particles. At these stages, the processes of chemisorption of the metal is not fully completed. The concentration of platinum and rhenium in the solution, respectively, of 0.05-0.1 and 0.1-0.3 g/DM3i.e. remain quite high. In the third stage the temperature of the impregnating solution to support at least 70°with deeper coordination compounds of platinum and rhenium with the surface of the carrier. The concentration of platinum and rhenium in the impregnating solution are reduced respectively to 0.02 and 0.05 g/DM3and the degree of adsorption of metals increases. At this stage, the high temperature promotes deeper penetration of platinum and rhenium in the fine pores of the aluminum oxide and durable fixation of small size pores. The implementation of these processes contributes to the introduction in the impregnating solution in the third stage of oxalic acid and / or hydrogen peroxide, as well as additional processing of the catalyst by vacuum pumping or treatment with water vapor PR is a temperature of at least 70° C. In total, the change of the conditions of interaction of hexachloroplatinic and rhenium acid with alumina promotes the formation on the media surface complex compounds of the optimal composition. The formation of these compounds as the precursor of the active component contributes to obtaining a catalyst with high activity, selectivity and stability.

Another distinctive feature of the proposed method, eliminating one of the disadvantages of the known, is the separation in time and the optimal change in the sequence of stages. In the system of media - solution dissociated in three stages. In the first stage, the temperature of the impregnating solution may not support higher hexachloroplatinic and rhenium acid, the main mechanisms of adsorption are ion exchange and (or) ligand substitution [Vukin, Vporn, Twimble, Lealt, Ashbery. Reports of the USSR Academy of Sciences, CH, No. 1, s.89-93, 1985; USCIS, Ashbery, Vahradian, Userfees. Chemistry and technology of fuels and oils. No. 1, pp.24-25, 1991]. Consolidation of platinum on alumina, treated with acetic acid, is carried out by ionoobmennogo mechanism. The chemical composition of the ions of hexachloroplatinic acid does not change. In this case, is implemented electrostatic type of interaction with the media. is kreplenie platinum on aluminum oxide treated with hydrochloric acid, is carried out on the mechanism of ligand substitution, the essence of which consists in the simultaneous replacement of several vnutrismennyh ligands of platinum on the surface functional groups of the carrier. The media in the latter case, plays the role of macroligand, and interaction with platinum accompanied by the formation of multicenter bonds. This contributes to a stronger interaction of platinum with the carrier in the subsequent calcination and recovery of the catalyst. The consequence of this interaction is the increase in the dispersion of platinum, education chlorine charged forms of platinum and, as a consequence, increased activity and selectivity of catalysts.

Processing media containing chloride and acetate ions in the known method of impregnating solution, which simultaneously serves N2PHCl6and HReO4creates the conditions of the reactions as ion exchange, and reactions of ligand substitution. The simultaneous occurrence of different reactions creates the heterogeneity of the chemical state of the precursors of the active component and, as a consequence, the heterogeneity of state of platinum in the finished catalyst.

This disadvantage is eliminated in the proposed method of preparation of the catalyst separation in time of an ionic exchange and ligand substitution. Given the second condition is achieved by two different methods.

The first technique involves the initial processing of the carrier under vacuum with water. While there are processes soft moisturizing media without cracking of the pellets and washing off the dust and chips of aluminum oxide. Subsequent processing of the media impregnating solution, in which a constant speed acetic enter first and rhenium acid, and then salt and hexachloroplatinic acid, promotes the separation in time of the processes of consolidating rhenium on the mechanism of ion exchange and platinum on the mechanism of ligand substitution.

The second technique involves the initial processing of the carrier under vacuum with an aqueous solution of acetic acid. While there are processes soft hydrate of aluminum oxide, cleaning it from dust and crumbs and chemical modification of the surface by chemisorption acetate ions. Subsequent processing of the media impregnating solution, in which a constant speed enter first rhenium acid, and then salt and hexachloroplatinic acid, also contributes to the separation in time of the processes of consolidating rhenium on the mechanism of ion exchange and platinum on the mechanism of ligand substitution.

A distinctive feature of the proposed method for preparation of the catalyst is repeated using platinum source impregnating solution for p is production not less than two parties catalyst, preferably not less than 20 parties.

Just spent 50 impregnation according to the method described in example 6 (see table). Analyses of the chemical composition of the catalysts from different parts of propitiates (top, middle, bottom), as well as in parallel experiments the preparation of the catalysts show that the method provides receiving catalysts homogeneous chemical composition. The maximum gradient for platinum equals 0.005%, rhenium - 0,007%. Found statistical dependence of the values of quantities of waste and losses of platinum and rhenium on the number of impregnations using a single impregnating solution. The data shown in figure 1 and 2. It is seen that the waste of platinum and rhenium is most greatly reduced by the application of an impregnating solution in the first 20 impregnations.

Reusability impregnating solution due to the lack of dust and crumbs media, which in turn results in deep shaded stages of leaching under vacuum with water or a solution of acetic acid.

The spent solution after preparation of 50 batches of catalyst has low turbidity and, in addition, completely liberated from mechanical impurities conventional filtration through a filter paper of medium porosity. On this basis, we can predict a significant reduction of the platinum-containing effluent directed to the flash steam is improving. As a consequence, one can expect a considerable reduction in energy consumption for evaporation of the working solutions.

Thus, the proposed method for the preparation of reforming catalysts provides:

- reduce consumption of platinum from 80 to 5 g Pt/ton of catalyst;

- reduce consumption of rhenium from 600 to 30 g Re/ton of catalyst;

- increasing the yield of the catalyst 2.3 wt.%.

Obtaining catalyst consists of the following stages:

1. The vacuum carrier to a residual pressure of 10-100 mm Hg This stage makes it possible to remove air from the pores of the carrier and eliminates the problem of cracking during the subsequent interaction with the impregnating solution.

2. Flushing medium is water or an aqueous solution of acetic acid. This stage ensures a gentle moistening medium, washing away the dust and crumbs and chemical surface modification of acetic acid. The solution is drained and neutralized.

3. Application of rhenium in circulation impregnating solution through the treated water or an aqueous solution of acetic acid media gradual addition in the impregnating solution of acetic and rhenium acid or concentrated solution of rhenium acid, the temperature of the solution does not support more than 30°C.

4. Application of platinum in circulation propisochlor the solution through the treated acetic and rhenium acid media gradual addition in the impregnating solution of hydrochloric and hexachloroplatinic acid at a temperature of not more than 30° C.

5. Application of platinum and rhenium processing recirculating through the layer of media impregnating solution at a temperature of at least 70°With added in an impregnating solution of oxalic acid and hydrogen peroxide.

6. The separation of the catalyst from the impregnating solution, which is reserved for the preparation of the next batch of catalyst.

7. The evacuation of the catalyst to a residual pressure of 10-100 mm Hg at a temperature of at least 70°or purging the catalyst with water vapor at a temperature of at least 70°C.

8. Drying the catalyst at 130°and annealing at a temperature of 500°With air flow.

9. Recovery of the catalyst in a stream of hydrogen at a temperature of 500°C.

10. Acarnania catalyst in a stream of hydrogen at a temperature of 220-400°feeding into the reactor sulfur-containing compounds in an amount not less than 0.07 wt.% in the calculation of the elemental sulfur.

The catalysts are experiencing in the process of reforming of hydrotreated straight run gasoline fraction at pilot plant with recirculation systems hydrogen-containing gas (hydrogen-rich), drying everything in the adsorbers with zeolites, the filing of organochlorine compounds in the reaction zone of the reformer.

Test conditions: a pressure of 1.5 MPa, the volumetric feed rate of 1.7 h-1the ratio of circulating SIV 1200 DM3/DM3raw, wet the be all 10-15 mg/m 3the ratio of water/chlorine in the reaction zone (15-20)/1 (mol).

The composition section of hydrogenated feed, wt.%: paraffin 63,2; naphthenic 27,0; aromatic 9,8; sulfur-containing 0,15×10-6. Fractional composition: Nicholas 102°, KK 178°C. loading capacity of the catalyst in the reactor 40 cm3. The feed rate of the hydrogenated feed is cut 68 cm3/hour.

Catalytic activity estimate value of the temperature in the reaction zone, which guarantees the content of aromatic hydrocarbons in a stable reformate in the range of mass concentrations 65-67%, which corresponds to the level of octane number 95-96 p. (MI).

The selectivity of the catalysts evaluated value output stable reformate, expressed in wt.% per filed with the recycling number gasoline fraction.

The stability of the catalysts appreciate the speed parameter decreases in stable reformate aromatic hydrocarbons (wt.% Ar/day). Test duration of 5 days.

Before testing, the catalyst is reactivated by hydrogen at 500°and sarnaut hydrogen sulfide at a temperature of 400°C.

The invention is illustrated by the following examples.

Examples 2-6 illustrate the effectiveness of the proposed method for the preparation of reforming catalysts.

Examples 1, 7-8 are shown for comparison.

X the chemical composition, the basic conditions of preparation, the quality indicators of catalysts and their catalytic properties in the table.

As a carrier of catalysts used aluminum oxide preferably a specific surface area of 280 m2/g, pore volume of 0.68 cm3/g, the effective radius of the pores of 4.5 nm.

Example 1. Illustrates a known method of preparation of the catalyst (prototype).

Granular alumina (100 g) vacuum to a residual pressure of 10 mm Hg and, without disconnecting the vacuum equipment under reduced pressure (10 mm Hg), circulate impregnating solution containing 6.0 wt.% acetic and hydrochloric acid (1:1) through the stationary layer media for 60 min, then replace the spent solution in 350 ml of water, which is recycled through the stationary layer of the device. In the circulating solution slowly with constant speed serves concentrated solutions of hexachloroplatinic and rhenium acid with a speed of 0.015 g of platinum and 0,039 g of rhenium per minute during 24,7 and 10.5 min, respectively.

The impregnation is carried out at 20°C for 60 min, the Degree of sorption of platinum is 94.5%of rhenium 83,0%. The granules are dried at 120°C, calcined at 500°C.

The catalyst was tested in the reforming of hydrotreated straight run fractions. Before testing, the catalyst is reactivated by hydrogen at 500° And sarnaut directly in the reactor pilot plant. At a temperature of 495°With the obtained reformate with a content of aromatic hydrocarbons 65 wt.%, which corresponds to the value of the octane number of 95 p. (THEM). The yield of reformate is an 80.2 wt.%. The rate of activity decline of 0.9% Ar/d.

Example 2.

The catalyst is prepared as in example 1 with the difference that after the impregnation with 20°With the temperature of the recirculating impregnating solution to support equal to 80°and process the media hot recirculating solution further 30 minutes, the Degree of sorption of platinum is 97 wt.%, rhenium is 87.5 wt.%.

The catalyst was tested in the process of reforming of gasoline fractions. At a temperature of 493°With the obtained reformate with a content of aromatic hydrocarbons 66 wt.% Output stable reformate is 83,3%. The rate of activity decline of 0.6% Ar/d.

Thus, the preparation of the catalyst the proposed method provides an increase in the degree of sorption of platinum and rhenium, as well as a significant increase in activity and a particularly strong selectivity and stability. The increase in the output stable catalyzate is 3.1 wt.%, that is equivalent to additional production of high octane gasoline in industrial plant with capacity of 600 thousand tons of raw materials in the amount of 18.6 Tyson the/year.

Example 3.

The catalyst is prepared as in example 2, with the difference that after the evacuation of the media and its treatment in an aqueous solution of hydrochloric acid or acetic acid under vacuum carrier handle recirculating impregnating solution, which serves first concentrated solution of rhenium acid with speed 0,039 g Re per minute during the 10.5 min, and then concentrated solution of hexachloroplatinic acid with a speed of 0.015 g Pt/minute for 24,7 minutes Impregnation is carried out at a temperature of 30°C for 35 min and then the temperature of the recirculating solution was raised to 70°and continue processing media for a further 30 minutes, the Degree of sorption of platinum is 97.5%, rhenium 88,0%.

The catalyst was tested in the process of reforming of gasoline fractions. At a temperature of 493°To receive the reformate with a content of aromatic hydrocarbons 66%. Output stable reformate is 85 wt.%. The rate of activity decline of 0.5% Ar/d.

The reforming catalyst in this embodiment of the method of preparation is considerably larger than the prototype (example 1) in all major indicators and especially in terms of selectivity and stability of operation.

Example 4.

The catalyst is prepared as in example 3 with the difference that after processing media impregnating solution at 70°it serves 0.25 g of oxalic is islote and 0.35 g of hydrogen peroxide, the temperature of the solution set 90°and processing the media recirculating solution continue for another 80 minutes

At a temperature of 490°To receive the reformate with a content of aromatic hydrocarbons 68 wt.%. The yield of reformate is to 85.5%. The rate of activity decline is 0.4% Ar/d.

Example 5.

Granular alumina (100 g) vacuum to a residual pressure of 50 mm Hg and without turning off the vacuum apparatus, washed with medium water under vacuum. When this happens the soft ublajenie media, filling the pores of the support with water without cracking, as well as the cleaning media from dust and crumbs of aluminum oxide. Then the media treated recirculating impregnating solution, taken after the preparation of the catalyst according to example 5. The solution contains platinum - 0.01 g and rhenium - 0.05 g, remaining nenormirovannyj from previous impregnation. In recirculating impregnating solution is injected alternately first solutions of rhenium and acetic acid with a speed of 0.03 and 0.3 g/min, respectively, and then hexachloroplatinic and hydrochloric acid with the velocity of 0.0125 and 0.04 g/min for 20 min, respectively, when the temperature of the solution 20°C. Then the temperature of the solution set is equal to 70°and treat them the catalyst for 30 minutes In an impregnating solution serves 0.15 g of oxalic acid. Printing handling the ku catalyst impregnating solution continue 20 minutes The degree of sorption of platinum 99,6%, the degree of sorption of rhenium 96%. An impregnating solution is drained and used for preparation of the next batch of catalyst. The catalyst was vacuum to a residual pressure of 20 mm Hg at a temperature of 70°C for 0.5 hours

At a temperature of 490°To receive the reformate with the release of 86 wt.% and with a content of aromatic hydrocarbons 67,0 wt.%.

Therefore, this variant of the method of preparation of the catalyst provides significantly higher performance of the reforming process in comparison with the known at significantly lower platinum content of 0.25 wt.% instead of 0.36), as well as increasing the yield of the catalyst and the degree of sorption of the active metals in the cooking process.

Example 6.

Granular alumina (100 g) vacuum to a residual pressure of 70 mm Hg and without turning off the vacuum equipment, treated with an aqueous solution containing 3.0 g of acetic acid for 45 minutes and Then treated with media impregnating solution taken after preparation of the catalysts in examples 4 and 5 containing 0.01 g of Pt and 0.05 g Re, in which first imposed a concentrated solution of rhenium acid with a speed of 0.03 g/min for 10 min, and then at the same time salt (0.09 g/min) and hexachloroplatinic acid (0.0125 g/min) for 20 minutes at a temperature of 20°C. Then dissolve is heated to 90° And the catalyst was treated with a hot solution of 30 minutes In the solution add 0.2 g of hydrogen peroxide catalyst and process 10 minutes the Solution is poured and left to prepare the next batch of catalyst. The catalyst is treated with water vapor for 30 min at a temperature of 100°C. the Catalyst was dried at 130°C, calcined at 500°With air flow, and then loaded into the test installation, restore and sarnaut in the reactor pilot plant.

At a temperature of 490°To receive the reformate with the release of 86%, which contains 70% of aromatic hydrocarbons, which corresponds to the value of the octane number of 100 p. (IM).

Thus, this variant of the preparation of the catalyst is most effective achievable activity, selectivity and stability compared with the known method of preparation of the catalyst of the reformer.

Example 7 (for comparison).

The catalyst is prepared as in example 2, with the difference that the treatment media impregnating solution, in which a constant speed add rhenium and hexachloroplatinic acid, is carried out at a temperature of impregnating solution 40°C. the Second stage hot impregnation is carried out at a temperature of 80°C. In this case, get the catalyst is lower than in example 2, the activity, selectivity and stabiles the firm (see table). In addition, get the catalyst with an uneven distribution of platinum and rhenium by volume of the carrier. The difference of the concentrations of platinum and rhenium in the upper and lower parts of the layer is 0.08 and 0.1%, respectively.

Example 8 (comparison).

The catalyst is prepared as in example 2, with the difference that the temperature of the impregnating solution in the first stage of impregnation of the support is equal to 30°and the second 60°C.

Get the catalyst with reduced in comparison with example 2, the activity, selectivity and stability.

td align="center"> 0,33
The chemical composition, the main parameters of the preparation, quality indicators catalysts and process indicators reforming of gasoline fractions 85-180°
ExampleThe chemical composition of the catalyst, wt.%The strength factor, kg/mmThe degree of sorption Pt, %The output of the catalyst, %The performance of the reformer
PtReClTemperature, °The content of the arene. in/in, wt.%The yield of reformate, wt.%The speed drop is activity, % Ar/day
1*0,350,331,21,194,596,749565,0an 80.20,9
20,360,351,11,297,597,249366,083,30,6
30,360,361,11,398,097,549367,085,00,5
40,360,351,11,397,597,549068,085,50,4
50,250,301,01,299,6of 98.249067,086,00,4
60,260,311,11,399,798,549070,086,00,3
7*0,340,301,21,398,699,049565,581,30,6
8*0,311,11,2for 95.296,949565,381,00,8
* to compare

1. The method of preparation of the catalyst for reforming of gasoline fractions, including degassing media, recycling through the medium of an aqueous solution of muriatic or hydrochloric acid or acetic acid under vacuum, the recirculation of the impregnating solution, in which a constant speed impose solutions platinochloride-hydrogen and rhenium acid, followed by drying and calcination, wherein processing the media impregnating solution is carried out in three stages, with the first and second stages of the cold impregnation circulating impregnating solution has a temperature of not more than 30°and in the third stage of the hot impregnation circulating impregnating solution has a temperature of at least 70°C.

2. The method according to claim 1, characterized in that in recirculating impregnating solution in the first stage is injected with a constant velocity solution of rhenium or rhenium and acetic acids.

3. The method according to claim 2, characterized in that in recirculating impregnating solution in the second stage is injected with a constant velocity solution of hydrochloric and platinochloride-hydrogen acids.

4. The method according to claim 3, characterized t is m, in recirculating impregnating solution in the third stage, introduce a solution of oxalic acid and / or hydrogen peroxide.

5. The method according to claim 1, characterized in that after degassing media, it is treated with water under vacuum.

6. The method according to claim 1, characterized in that after degassing media process recycling of acetic acid solution under vacuum.

7. The method according to claims 1 and 6, characterized in that in recirculating impregnating solution alternately with a constant speed enter first rhenium acid, and then in the second stage together salt and platinochloride-hydrogen acid.

8. The method according to claim 7, characterized in that the impregnating platinochloride solution used to prepare at least two batches of catalyst, preferably not less than 20 parties.

9. The method according to claim 7, characterized in that after the treatment media impregnating solution, the spent solution is drained and the catalyst vacuum at a temperature of at least 70°C.

10. The method according to claim 7, characterized in that after the treatment media impregnating platinum source solution, the catalyst is treated with steam at a temperature of at least 70°C.



 

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8 cl, 2 tbl, 5 ex

FIELD: petrochemical process catalysts.

SUBSTANCE: invention relates to synthesis of C5-C100-hydrocarbons from CO and H2, which catalyst contains carrier based on alumina prepared from gibbsite-structure aluminum hydroxide and cobalt in concentration of 15 to 50%. Carrier is prepared by mixing dry cobalt compound with dry gibbsite-structure aluminum hydroxide at cobalt-to aluminum molar ratio between 1:1 and 1:30, followed by calcination, impregnation (in two or more steps) with aqueous cobalt salt solution, and heat treatment. Invention also discloses process of producing C5-C100-hydrocarbons using above catalyst.

EFFECT: increased selectivity of catalyst regarding production of high-molecular hydrocarbons at reduced yield of methane.

7 cl, 1 tbl, 10 ex

FIELD: petroleum processing and petrochemistry.

SUBSTANCE: catalytic reforming carried out at temperature in the reforming zone entry not higher than 485°C is supplemented by sulfidizing accomplished by introducing sulfur-containing compounds by doses each constituting 0.001-0.02% sulfur of the weight of catalyst, intervals between doses being not less than 1/2 one dose introduction time and at summary amounts of added sulfur 0.02-0.2% sulfur of the weight of catalyst during additional sulfidizing period. Additional sulfidizing is performed one or several times over the service cycle lasting hundreds or thousands hours. One sulfur dose addition time ranges from 0.5 to 1.5 h.

EFFECT: increased yield of reforming catalysate.

3 cl, 1 tbl, 7 ex

FIELD: petroleum processing catalysts.

SUBSTANCE: invention provides reforming catalyst containing Pt and Re on oxide carrier, in particular Al2O3, wherein content of Na, Fe, and Ti oxides are limited to 5 (Na2O), 20 (Fe2O3), and 2000 ppm (TiO2) and Pt is present in catalyst in reduced metallic state and in the form of platinum chloride at Pt/PtCl2 molar ratio between 9:1 and 1:1. Contents of components, wt %: Pt 0.13-0.29, PtCl2 0.18-0.04, Re 0.26-0.56, and Al2O3 99.43-99.11. Preparation of catalyst comprises impregnation of alumina with common solution containing H2PtCl6, NH4ReO4, AcOH, and HCl followed by drying and calcination involving simultaneous reduction of 50-90% platinum within the temperature range 150-550оС, while temperature was raised from 160 to 280оС during 30-60 min, these calcination conditions resulting in creation of reductive atmosphere owing to fast decomposition of ammonium acetate formed during preparation of indicated common solution.

EFFECT: increased catalytic activity.

2 cl, 1 tbl, 3 ex

The invention relates to the refining and petrochemical industries

The invention relates to the field of petrochemical, refining, or rather to the catalysts used in the refining

The invention relates to the production of catalysts, in particular latinoreview catalyst for reforming of gasoline fractions

The invention relates to a catalyst and method of its preparation for the selective purification of gas mixtures containing nitrogen oxides, oxygen, and nitrogen dioxide

The invention relates to the preparation of catalysts for reforming of gasoline fractions and can be used in the refining and petrochemical industries

The invention relates to catalysts with the aim of obtaining high-octane components of gasoline and aromatic hydrocarbons and methods for their preparation

FIELD: petroleum processing catalysts.

SUBSTANCE: invention provides reforming catalyst containing Pt and Re on oxide carrier, in particular Al2O3, wherein content of Na, Fe, and Ti oxides are limited to 5 (Na2O), 20 (Fe2O3), and 2000 ppm (TiO2) and Pt is present in catalyst in reduced metallic state and in the form of platinum chloride at Pt/PtCl2 molar ratio between 9:1 and 1:1. Contents of components, wt %: Pt 0.13-0.29, PtCl2 0.18-0.04, Re 0.26-0.56, and Al2O3 99.43-99.11. Preparation of catalyst comprises impregnation of alumina with common solution containing H2PtCl6, NH4ReO4, AcOH, and HCl followed by drying and calcination involving simultaneous reduction of 50-90% platinum within the temperature range 150-550оС, while temperature was raised from 160 to 280оС during 30-60 min, these calcination conditions resulting in creation of reductive atmosphere owing to fast decomposition of ammonium acetate formed during preparation of indicated common solution.

EFFECT: increased catalytic activity.

2 cl, 1 tbl, 3 ex

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