Petroleum fractions hydrofining catalyst and a method for preparation thereof

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.

EFFECT: enhanced efficiency of hydrofining raw materials comprising elevated amounts of unsaturated hydrocarbons.

2 cl, 2 ex

 

The invention relates to the refining and petrochemical industries, in particular the production of catalysts for use in the process of Hydrotreating petroleum fractions.

In patent No. 2084285 (IPC RU601J 37/02, publ. 20.07.97, bull. 20) described a catalyst for Hydrotreating petroleum fractions, the composition of which includes the following components, wt%:

NiO3,0-3,6
Moo39,0-11,0
Na2Oless than 0.1
Soo0,3-0,6
Al2O3rest

There is described a method of preparation of known catalyst which comprises a carrier impregnated with a solution of salts of Nickel and molybdenum in the presence of phosphoric acid at pH of 2.5-3.5, subsequent drying and calcining the resulting catalyst mass. As the carrier used aluminum hydroxide and aluminoborosilicate powder with a particle size of 10-100 microns, pre-treated with a solution of nitric acid at pH 1.5 to 3.0 and a temperature of 80-95°taken in a mass ratio of (4-9):1.

The catalyst is tested in the process of Hydrotreating diesel fuel containing 0,83 wt.% sulfur compounds. The tests were carried out at a temperature of 345°C, a pressure of 4.5 MPa and about the roadways to the feed rate of the raw material 4,0 h -1. The residual sulfur content in the hydrogenation product is about 0,03-0,04 wt.%.

Common symptoms are known and inventive catalysts is that their composition comprises oxides of Nickel, molybdenum, sodium and aluminum.

Common features of known and proposed methods of preparation of the catalysts is the carrier impregnated with the active compounds of components in the presence of phosphoric acid, followed by drying and calcination.

The disadvantages of the known technical solutions are more complex the technology, due to the need for special training aluminoborosilicate crumbs.

From patent No. 2206396 (IPC RU701J 37/04, publ. 20.06.2003, bull. 17) is a known catalyst for Hydrotreating petroleum fractions, which has the following chemical composition, wt.%:

NiO2,5-4,0
Moo310,0-12,0
Na2O0,03-0,1
P2O53,2-5,0
In2About3of 0.3-0.9
Al2O3rest

There is described a method of preparation of this catalyst, which is carried out by introducing the aluminum hydroxide chopped almocabar the molybdenum catalyst with subsequent forming, drying, calcining the pellet carrier, impregnating the latter with a solution of salts of Nickel and molybdenum, again drying and calcining. While the introduction of aluminum hydroxide aluminoborosilicate catalyst is carried out in the presence of phosphoric and boric acids, and crushed allocability the catalyst is used in amounts of 5-15% by weight of aluminum hydroxide.

The test is known catalyst in the Hydrotreating of vacuum gas oil at a temperature of 360°C, a pressure of 40 MPa, the space velocity of the feedstock 1.5 h-1allows you to get a 97% degree of desulfurization.

Common symptoms are known and inventive catalysts is that their composition comprises oxides of Nickel, molybdenum, sodium, boron, phosphorus and aluminum.

Common features of known and proposed methods of preparation of the catalysts is the carrier impregnated with the active compounds of components, followed by drying and calcination.

The disadvantages of the known technical solutions are more complex the technology, due to the need for preliminary grinding aluminoborosilicate crumbs.

From (2008972, 01J 37/04, 23/88, 1994) known catalyst for Hydrotreating petroleum fractions having the following chemical composition, wt.%:

NiO4,0-6,0
Moo310,0-12,0
In2About36,0-10,0
YAl2About3rest

There is described a method of preparation of this catalyst, which comprises mixing alumina carrier with salts hydrogenating metals Nickel (cobalt and molybdenum in the presence of boric acid, drying and calcining under optimal conditions. At the same time as media use aluminum borate obtained by processing technical three-hydrate of aluminum in a fluidized bed while raising the temperature at a speed of 50-70°With up to 400-600°C for 1-6 h, followed by patsatsia products of thermal treatment in an acidic environment at pH 2.0 to 4.0, the temperature 135-200°S, the duration of the process 1-20 h and treatment with boric acid at pH 5.0-7.0 and a temperature of 80-90°C.

Known catalyst provides the required depth of removal of sulfur compounds at a temperature of 360-370°C.

This mainegenealogy the period of operation of the catalyst is 4-5 months. Each regeneration is associated with the necessity of screening 8% of the catalyst in the form of dust.

Common symptoms are known and the claimed invention is that the composition comprises oxides of Nickel, molybdenum, boron and aluminum.

Common features known the aqueous and the proposed methods of preparation of the catalysts is the carrier impregnated with the active compounds of components, subsequent drying and calcination.

Famous (Ed. mon. The USSR 1547122, CL B01J 37/02, 29/04, 1986) catalyst for hydrofining of petroleum raw materials of the following composition, wt.%. The zeolite in the form of MoO3NH4NaY - 5-20; NiO - 3,5-5,0; NGO3- 10-20; P2O5-1,5-3,0;2About3- 2,0-10,0; Al2About3- the rest.

The catalyst provides the depth of removal of sulfur compounds at the level of 90%.

Common symptoms are known and the claimed invention is that the composition comprises oxides of Nickel, molybdenum, phosphorus, boron and aluminum.

From patent No. 2102146 (IPC RU701J 37/04, publ. 20.01.98., Bull. 2) a well-known catalyst for Hydrotreating petroleum fractions, which has the following composition, wt.%:

NiO3,0-4,5
Moo310,0-12,0
Na2O0,02-0,08
P2About50.5 to 1.5
In2O31,0-3,0
Al2O3rest

There is described a method of obtaining this catalyst, which comprises mixing alumina carrier with boric acid and molybdenum salt solution, followed by shaping, drying and calcining the pellets. Received lumbrokinase composition impregnated with rest the rum Nickel nitrate in the presence of phosphoric acid at a pH of 3.6 to 4.5.

The degree of desulfurization in the Hydrotreating of diesel fuel at a temperature of 335°is 91,9%, and at 342° - 92,8%.

When the Hydrotreating benzene-toluene-xylene fraction degree of desulfurization at a temperature of 250°is 75,0%.

Common symptoms are known and inventive catalyst is that their composition comprises oxides of Nickel, molybdenum, sodium, boron, phosphorus and aluminum.

Common features of known and proposed methods of preparation of the catalysts is the carrier impregnated with the active compounds of components, followed by drying and calcination.

The disadvantages of the known catalyst are need for 3-4 hydrogen treatments per year to the activation of the catalyst due to coking.

The closest (prototype) to the technical essence and the achieved result the catalyst is the catalyst for Hydrotreating petroleum fractions, is known from the patent No. 2197323 (EN, 01J 23/88, publ. 27.01.03), which includes the oxides of cobalt and/or Nickel, molybdenum trioxide, native oxide of aluminum, silicon. The carrier further comprises at least one of modifying a combination of metals selected from the group: sodium, iron, lanthanum, cerium, zinc, copper, tungsten, and/or at least one connection of non-metals, selected from the group of phosphorus, fluorine, and boron. Ka is alistar has the following composition, wt.%: NiO and/or COO 1-5 Moo38-15, the medium comprising: SiO20.01 to 50, modifying the connection metals from 0.01 to 5 and/or the connection of nonmetals 0.5 to 10, the alumina - rest. The precursor of aluminium oxide is x-ray amorphous layered compound of aluminium of the formula Al2O3·nH2O, where n=0.3 to 1.5.

There is described the closest (prototype) to the technical essence and the achieved result of the preparation method of catalyst for Hydrotreating petroleum fractions containing oxides of Nickel, molybdenum, phosphorus, lanthanum, boron, and aluminum oxide. The known method includes forming by extrusion of aluminum hydroxide containing the modifying compound, drying, calcination, impregnation with a solution of compounds active components of Nickel and/or cobalt, molybdenum, followed by drying and calcining. As aluminum hydroxide use the product rehydration x-ray amorphous layered aluminum compounds of the formula Al2About3·nH2Oh, where n=0.3 to 1.5, which contains the full or partial amount of the modifier metal compounds selected from the group: sodium, iron, lanthanum, cerium, zinc, copper, tungsten, in an amount of 0.01-5 wt.%, and/or at least one connection of non-metals, selected from the group of phosphorus, fluorine, boron, in the amount of 0.5-10 wt.%.

A disadvantage of the known technical R the solutions is the complexity of the technology of preparation of the catalyst.

Object of the invention is the expansion of the range of catalysts with high gidroobesserivaniya activity during the processing of crude oil containing large amounts of unsaturated hydrocarbons, as well as expanding the range of methods of preparation of these catalysts.

The technical result of the invention is to provide a high gidroobesserivaniya activity prepared by the claimed method of the catalyst when it is used in the refining process of crude oil containing large amounts of unsaturated hydrocarbons.

The claimed technical result from the implementation of the catalyst for Hydrotreating petroleum fractions, comprising the oxides of cobalt, molybdenum, sodium, lanthanum, phosphorus, boron and aluminum, reach due to the fact that the catalyst has the following composition, wt.%:

NiO2,5-4,0
Moo38,0-12,0
Na2O0,01-0,08
La2O31,5-4,0
P2O52,0-5,0
In2O30,5-3,0
Al2O3rest

Comparative analysis of the prototype and the proposed catalyst shows the AET, what are the common signs is a catalyst composition that includes the oxides of cobalt, molybdenum, sodium, lanthanum, phosphorus, boron, aluminum.

The inventive catalyst is different from the known number of components, wt.%:

NiO2,5-4,0
Moo38,0-12,0
Na2O0,01-0,08
La2O31,5-4,0
P2O52,0-5,0
In2O30,5-3,0
Al2O3rest

The claimed technical result from the implementation of the method of preparation of catalyst for Hydrotreating petroleum fractions containing oxides of Nickel, molybdenum, phosphorus, lanthanum, boron, and aluminum oxide, comprising a carrier impregnated with active compounds of components a solution of nitrates of Nickel and paramolybdate ammonium, followed by drying and calcining at a high temperature, reach the fact that the aluminum hydroxide is mixed with a solution of boric acid and a nitric acid solution of lanthanum carbonate, followed by drying, calcination and impregnation of the received carrier with a solution of Nickel nitrate and paramolybdate ammonium carried out at a pH of from 1.5 to 3.0, the temperature of 40-80#x000B0; In the presence of phosphoric acid.

Prepared using the proposed method the catalyst for Hydrotreating petroleum fractions has the following composition, wt.%:

NiO2,5-4,0
Moo38,0-12,0
Na2O0,01-0,08
La2O31,5-4,0
P2O52,0-5,0
In2O30,5-3,0
Al2O3rest

Comparative analysis of the prototype and the proposed method shows that the General characteristics of the composition of the obtained catalysts containing oxides of Nickel, molybdenum, phosphorus, lanthanum, boron, and aluminum oxide, the carrier impregnated with the active compounds of components a solution of nitrates of Nickel and paramolybdate ammonium, followed by drying and calcination at elevated temperature.

A distinctive feature of the proposed method is that the aluminum hydroxide is mixed with a solution of boric acid and a nitric acid solution of lanthanum carbonate, followed by drying, calcination and impregnation of the received carrier with a solution of Nickel nitrate and paramolybdate ammonium carried out at a pH of from 1.5 to 3.0, the temperature of 40-80°in PR is the absence of phosphoric acid.

The method of preparation of the inventive catalyst comprises the following stages.

1. The preparation of a carrier is as follows. Mix the calculated amount of aluminum hydroxide (pellet pseudoboehmite and bemani structure consisting of a 60-40 wt.% pseudoboehmite and 40-60 wt.% boehmite, the composition includes up to 0.10 wt.% Na2O), boric acid and nitric acid solution of lanthanum carbonate. The resulting mass is stirred at a temperature of 30°C for 15 minutes. When obtaining a homogeneous mass add 1,5 DM325%aqueous ammonia, after which the mass is stirred at 80°C for 20 minutes. Ready weight with a dry matter content of 50% formed into pellets with a diameter of 1.7 mm Molded pellets are dried for 5 hours at a temperature of 120-200°and then calcined at a temperature of 450°C for 5 hours.

2. At the same time preparing an impregnating solution. In the solvent pour the calculated amount of water and phosphoric acid, then with continuous stirring at a temperature of 40-80°download the necessary amount of Nickel nitrate. In the resulting solution with a given concentration of NiO at pH 1.5 to 3.0 download the necessary number of paramolybdate ammonium to obtain a solution of a given concentration of Moo3.

3. Then hold the carrier impregnated with the active compounds compo is having which is as follows. In the capacity of the load estimated number obtained as described above medium, then from the dipstick add the estimated amount of the impregnating solution (40-80°C, pH 1.5 to 3.0)containing Nickel nitrate, paramolybdate of ammonia and phosphoric acid.

4. Saturated compounds active component carrier is dried at a temperature of 150°and calcined at a temperature of 450°C.

The proposed catalyst provides a more effective Hydrotreating of crude oil, containing increased amounts of unsaturated hydrocarbons.

The following are specific embodiments of the claimed invention.

Example 1.

The media is prepared by mixing aluminum hydroxide (pellet pseudoboehmite and bemani structure consisting of 60 wt.% pseudoboehmite and 40 wt.% boehmite, the composition includes up to 0.10 wt.% Na2O) in an amount of 40 kg 0.7 kg of boric acid and 7 l nitric acid solution of carbonate of lanthanum, with a concentration of 300 g/DM3the oxide of lanthanum. The resulting mass is stirred at a temperature of 30°C for 15 minutes. Once smooth add the 1.5 DM325%aqueous ammonia and the mass stirred at 80°C for 20 minutes. Ready weight with a dry matter content of 50% formed into pellets with a diameter of 1.7 mm Molded pellet is dried for 5 hours at a temperature of 120-200° C, and then calcined at a temperature of 450°C for 5 hours.

At the same time preparing an impregnating solution. The solvent is poured 400 DM3water, add 40 DM3orthophosphoric acid and load 170 kg of Nickel nitrate with continuous stirring at a temperature of 40°C. To the resulting solution with a concentration of 50 g/DM3NiO at pH 3.0 load 120 kg paramolybdate ammonium to obtain a solution with a concentration of 200 g/DM3Moo3.

Then hold the carrier impregnated with the active compounds of components, which is as follows. In the capacity of the load estimated number obtained as described above medium, then from the dipstick add the estimated amount of the impregnating solution (40°C, pH 3.0)containing Nickel nitrate, paramolybdate of ammonia and phosphoric acid.

Saturated compounds active component carrier is dried at a temperature of 150°and calcined at a temperature of 450°C.

The finished catalyst contains the following ratio of components, wt.%:

NiO4,0
Moo3to 12.0
Na2O0,08
La2O34,0
P2O52,0
In2About33,0
Al2O3rest

The catalyst has an index of strength of 2.3 kg/mm diameter pellets. Test it with the Hydrotreating of diesel fuel at a temperature of 335°provides for 98.5%of the depth of removal of sulfur compounds. Use it during hydrofining benzene-toluene-xylene fraction (iodine value at the input 26 g I2/100 g, iodine number at the output of 0.4 g of I2/100 g product) at 230°provides for reduction of sulfur compounds on 90,0% (wt.). The degree of hydrogenation of unsaturated hydrocarbons up to 98%. This mainegenealogy period is 11 months. After 2 years of work required hydrogen treatment of the catalyst with a periodicity of 6 months.

Example 2.

The media is prepared by mixing aluminum hydroxide (pellet pseudoboehmite and bemani structure, consisting of 40 wt.% pseudoboehmite and 60 wt.% boehmite, the composition includes up to 0.10 wt.% Na2O) in an amount of 40 kg 0.6 kg of boric acid and 2.2 l nitric acid solution of lanthanum carbonate with a concentration of 300 g/DM3the oxide of lanthanum. The resulting mass is stirred at a temperature of 30°C for 15 minutes. Once smooth add the 1.5 DM325%aqueous ammonia and the mass stirred at 80°within 20 minutes. Ready weight with a dry matter content of 50% formed into pellets with a diameter of 1.7 mm Molded pellets are dried for 5 hours at a temperature of 120-200°and then calcined at a temperature of 450°C for 5 hours.

At the same time preparing an impregnating solution in a solvent is poured 400 DM3water, add 50 DM3orthophosphoric acid and load 160 kg of Nickel nitrate with continuous stirring at a temperature of 80°C. To the resulting solution with a concentration of 50 g/DM3NiO at pH of 1.5 load 110 kg paramolybdate ammonium to obtain a solution with a concentration of 190 g/DM3Moo3.

Then hold the carrier impregnated with the active compounds of components, which is as follows. In the capacity of the load estimated number obtained as described above medium, then from the dipstick add the estimated amount of the impregnating solution (80°C, pH of 1.5)containing Nickel nitrate, paramolybdate of ammonia and phosphoric acid.

Saturated compounds active component carrier is dried at a temperature of 150°and calcined at a temperature of 450°C.

The finished catalyst contains the following ratio of components, wt.%:

NiO2,5
Moo380
Na2O0,01
La2O31,5
P2O55,0
In2About30,5
M2About3rest

The catalyst has an index of strength of 2.3 kg/mm diameter pellets. Test it with the Hydrotreating of diesel fuel at a temperature of 335°provides 93,0%depth of removal of sulfur compounds. Use it during hydrofining benzene-toluene-xylene fraction (iodine value at the input 26 g I2/100 g, iodine number at the output of 0.4 g of I2/100 g product) at 230°provides for reduction of sulfur compounds by 83% (wt.). This mainegenealogy period is 11 months. After 2 years of work required hydrogen treatment of the catalyst after 6 months.

Implementation of the proposed catalyst obtained by the present method, during the process of Hydrotreating of crude oil containing large amounts of unsaturated hydrocarbons, provides a high degree of desulfurization and the receiving section of hydrogenated feed with low content of sulfur compounds. This can be achieved by improving the technical and economic indicators: saving energy and material resources.

1. Catalysts of the Hydrotreating petroleum fractions, comprising oxides of Nickel, molybdenum, sodium, lanthanum, phosphorus, boron, aluminum, characterized in that it has the following composition, wt.%:

NiO2,5-4,0
Moo38,0-12,0
Na2O0,01-0,08
La2O31,5-4,0
P2O52,0-5,0
In2About30,5-3,0
Al2O3rest

2. The preparation method of catalyst for Hydrotreating petroleum fractions containing oxides of Nickel, molybdenum, phosphorus, lanthanum, boron, and aluminum oxide, comprising the impregnation of the carrier containing the oxide of sodium, the active compounds of components a solution of nitrates of Nickel and paramolybdate ammonium, followed by drying and calcining at elevated temperature, characterized in that the aluminum hydroxide containing sodium oxide, is mixed with a solution of boric acid and a nitric acid solution of lanthanum carbonate, followed by drying, calcination and impregnation of the received carrier with a solution of Nickel nitrate and paramolybdate ammonium carried out at a pH of from 1.5 to 3.0, the temperature of 40-80° in the presence of phosphoric acid.



 

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10 cl, 2 tbl, 2 ex

FIELD: hydrogenation-dehydrogenation catalysts.

SUBSTANCE: invention relates to production of alkylaromatic hydrocarbon dehydrogenation catalysts and can be employed in chemical and petrochemical industries. Catalyst according to invention comprising molybdenum oxide MoO2, ferrous oxide F2O3, cerium dioxide CeO2, and iron, potassium, calcium , and magnesium compounds is characterized by containing solid solution of potassium ferrites and, additionally, cesium and/or rubidium ferrites MFeO2 and M2Fe10O16, where M=K+Contains and/or Rb, and also ferrite Ca2(MgZn)1Fe2O3 Catalyst may be granulated in the form of trefoil with holes in each foil, which are shifted toward the center of granule, or it may be in the form of circle with three, four, or five internal spokes. Catalyst preparation process and a process of dehydrogenation of alkylaromatic hydrocarbons in presence of indicated catalyst are also described.

EFFECT: enabled preparation of strong catalyst showing high activity and selectivity, and ensuring reduced pressure in reactor owing to lowered hydraulic resistance.

11 cl, 4 tbl, 10 ex

FIELD: petrochemical process catalysts.

SUBSTANCE: invention, in particular, relates to catalysts based on nickel, cobalt, molybdenum, aluminum oxides. Regeneration of exhausted catalyst is carried out through heat treatment in air atmosphere at 550-600°C for 1-1.5 h followed by: mechanical activation at energy concentration at least 6.6 W/g on vibrational mill; grinding into powder; adding at stirring a mixture containing nitric acid solution (concentration 3,5-7%), cobalt or nickel nitrate and ammonium paramolybdate; molding; drying; and calcination.

EFFECT: simplified regeneration procedure and enabled restoration of catalyst strength.

1 tbl, 12 ex

FIELD: petrochemical process catalysts.

SUBSTANCE: invention relates to determining polymerizing activity of catalysts that can be used for hydrogenation of unsaturated compounds contained in liquid pyrolysis products. As a variable reflecting polymerizing activity of hydrogenation catalysts, optical density value of liquid mixture is used, said mixture containing unsaturated compounds and being kept in contact with catalyst at elevated temperature for a predetermined period of time. Determination of polymerizing activity is accomplished by comparing optical density of liquid mixture containing unsaturated compounds before and after its contact with catalyst. In order to measure optical density of liquid mixture, standard laboratory equipment (photocolorimeter and spectrophotometer) may be utilized.

EFFECT: enabled comparison of polymerizing activity of catalysts directly with respect to industrial feedstock.

3 cl, 2 dwg, 3 tbl, 38 ex

FIELD: petroleum processing.

SUBSTANCE: invention, in particular, relates to petroleum fraction hydrofining process utilizing presulfided catalysts. Hydrofining process is described involving contacting petroleum fractions with presulfided catalyst containing alumina-carried cobalt, molybdenum, phosphorus, and boron, said process being conducted at 320-340°C, pressure 3.0-5.0 MPa, volumetric feed supply rate 1.0-6.0 h-1, normalized volumetric hydrogen-containing gas-to-feed ratio (500-1000):1 in presence of catalyst sulfided outside of reactor. Sulfidizing of catalyst is accomplished with hydrogen sulfide at 80-500°C and volumetric hydrogen sulfide flow rate 0.02-6.0 h-1. Chemical composition of catalyst is the following, wt %: MoS2 8.0-17.0, Co3S2 1.5-4.0, P2O3 2.5-5.0, B2O3 0.3-1.0, La2O3 1.0-5.0, and aluminum oxide - the balance.

EFFECT: simplified process.

2 cl, 1 tbl, 3 ex

FIELD: production of catalytic compositions.

SUBSTANCE: proposed method includes combining and bringing into interaction at least one component of non-precious metal of group VII and at least two components of metal of VIB group in presence of proton liquid; then composition thus obtained is separated and is dried; total amount of components of metals of group VIII and group VIB in terms of oxides is at least 50 mass-% of catalytic composition in dry mass. Molar ratio of metals of group VIB to non-precious metals of group VIII ranges from 10:1 to 1:10. Organic oxygen-containing additive is introduced before, during or after combining and bringing components into interaction; this additive contains at least one atom of carbon, one atom of hydrogen and one atom of oxygen in such amount that ratio of total amount of introduced additive to total amount of components of metals of group VIII to group VIB should be no less than 0.01. This method includes also hydraulic treatment of hydrocarbon material in presence of said catalytic composition.

EFFECT: enhanced efficiency.

29 cl, 8 ex

FIELD: chemical industry; catalyzers for dehydrogenation of the alkyl-aromatic hydrocarbons.

SUBSTANCE: the invention presents the catalyzer used for dehydrogenation the alkyl-aromatic hydrocarbons of the following composition (in mass%): potassium compounds (in terms of potassium oxide) - 8.0-25.0; magnesium compounds and-or calcium compounds (in terms of magnesium oxide and-or calcium oxide) - 0.2-7.0; molybdenum oxide - 0.7-7.0; cerium oxide - 1.0-15.0; Portland cement - 0.5-12.0; lanthanum oxide and-or neodymium oxide - 0.01-7.0; iron oxide - the rest. The technical result of the invention is the increase of activity, selectivity of the catalyzer, as well as the thermal stability, which increases the catalyzer service life.

EFFECT: the invention ensures the increase of activity, selectivity, thermal stability and the service life of the catalyzer.

4 cl, 20 ex, 2 tbl, 2 dwg

FIELD: petroleum chemistry.

SUBSTANCE: claimed method includes purification of naphthalene-containing cuts from unsaturated compounds by catalytic polymerization followed by isolation of high purity naphthalene. Polymerization is carried out in presence of aluminum-cobalt-molybdenum catalyst, containing (mass %): cobalt oxide (CoO) 2.0-6.0 and molybdenum trioxide (MoO3) on carrier: Y-Al2O3 under pressure up to 0.6 MPa, at temperature of 180-200°C for 1-10 hours.

EFFECT: increased naphthalene yield.

2 tbl, 5 ex

FIELD: petroleum processing and petrochemistry.

SUBSTANCE: catalytic system of hydrocarbon feedstock hydrofining is activated by circulating hydrogen-containing gas or mixture thereof with starting feedstock through layer-by-layer loaded catalysts in presulfided or in presulfided and oxide form at elevated temperature and pressure. Hydrogen is injected into circulating hydrogen-containing gas or mixture thereof with starting feedstock portionwise, starting concentration of hydrogen in circulating hydrogen-containing gas not exceeding 50 vol %. Starting feedstock consumption is effected stepwise: from no more than 40% of the working temperature to completely moistening catalytic system and then gradually raising feedstock consumption to working value at a hourly rate of 15-20% of the working value. Simultaneously, process temperature is raised gradually from ambient value to 300-340°C. Circulating factor of hydrogen-containing gas achieves 200-600 nm3/m3. Addition of each portion of hydrogen is performed after concentration of hydrogen in circulating hydrogen-containing gas drops to level of 2-10 vol % and circulation of hydrogen-containing gas through catalysts loaded into reactor begins at ambient temperature and further temperature is stepwise raised. Starting feedstock, which is straight-run gasoline or middle distillate fractions, begins being fed onto catalytic system at 80-120°C.

EFFECT: enabled prevention and/or suppression of overheating in catalyst bed.

5 cl, 6 tbl, 12 ex

FIELD: oxidation catalysts.

SUBSTANCE: invention relates to sorption engineering and can be used for regeneration of different kinds of hopcalite lost catalytic activity during long-time storage. Regenerated sorbents can be used un respiratory masks and in processes or removing carbon monoxide from industrial emissions. Invention provides a method for activating carbon monoxide oxidation catalyst involving heat treatment thereof and characterized by that activation is conducted by heating catalyst bed 2-3 cm thick to 180-380°C at temperature rise velocity 10-20°C/min while constantly carrying away reactivation products.

EFFECT: enabled restoration of catalytic activity.

3 ex

FIELD: hydrogenation-dehydrogenation catalysts.

SUBSTANCE: invention provides catalyst based on iron oxide and lanthanide compound wherein at least part of iron oxide is prepared via a method including thermal decomposition of iron halide and which contains lanthanide in amount corresponding to 0.07 to 0.15 mole per mole iron oxide found in catalyst (calculated as Fe2O3). A catalyst is also described wherein part of iron oxide contains residual halide. Preparation of catalyst involves providing a mixture containing sufficient amounts of at least iron oxide and lanthanide compound followed by calcination of the mixture. Alkylaromatic compound dehydrogenation process is further described involving contact of raw feed containing alkylaromatic compound with above-described catalyst as well as polymer or copolymer production process involving production of alkenylaromatic compound as described above and subsequent polymerization thereof or copolymerization with a monomer.

EFFECT: enabled production of alkenylaromatic compounds with improved characteristics owing de decreased formation of by-products.

18 cl, 2 ex

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