Method of producing high octane gasoline
(57) Abstract:Usage: petrochemistry. The inventive zeolite catalyst is treated with a solution of modifier - complexes derived siloxane with metal. The solution is passed through the catalyst with a bulk velocity of 0.5 - 1.5 cm3/cm3.with 70 - 80oC for 1 to 3 hours, the feed Rate of the solution can withstand more speed evaporation. The treated catalyst spend reforming of gasoline fractions. table 1. The invention relates to the refining industry, and in particular to methods of producing high octane gasoline catalytic reforming.Known methods for producing high-octane gasoline catalytic reforming of gasoline fractions (1,2).In these ways (1,2) the necessity of using high pressure hydrogen (3,5-52,5 ATM) leads to the formation of large amounts of coke. In addition, in the methods (1,2) circulation of the hydrogen-containing gas in large quantities necessitates elevated energiza - TPAT.A prototype of the chosen method of producing high-octane gasoline by catalytic reforming of gasoline fractions (3). In proizvodnjo of siloxane with metal. This pre-processing is produced as follows. The catalyst is poured a solution of aluminiumsilicon or its mixture with synkopenleben in the light aromatic fraction, mixed and incubated at an elevated temperature within 24 hoursMethod (3) produces a target product with an octane number not exceeding 80 (p) by the motor method.The technical result of the proposed method is to improve the quality of the target product by increasing its octane number.This is achieved by pre-processing is carried out by passing the solution through the catalyst modifier with a bulk velocity of 0.5-1.5 cm3/s at a temperature of 70-80aboutC for 1-3 h, and the feed rate of solution of the modifier more speed evaporation.The essence of the proposed technical solution is above the pre-processing.The method is carried out as follows.The catalyst loaded into the reactor under atmospheric pressure, heated to 550-650aboutC and calcined in a stream of purified and osmannoro air within 3-6 h to clean the surface from impurities.Then coorectly 0.5-1.5 cm/cm2C for 1-3 hAs a modifier can be used, for example, a solution of aluminiumsilicon, alumnirelations or mixtures thereof in the ratio 50:50 mixture of acetone with toluene in a ratio of from 30:70 to 60:40.The evaporation rate of the solvent regulate temperature or volumetric feed rate of solution of the modifier. At the end of the feed solution modifier system purge with an inert gas, such as nitrogen, methane or other within 15-30 min and start the rise of the temperature at a rate of 100aboutS/h with air or inert gas. The heating is carried out up to 400aboutC. At this temperature, spend warming up of the catalyst modifier for 1-3 hours and then the system is switched to the mode of reforming of gasoline fractions. When processing of the catalyst described by partial evaporation of the solvent leads to the formation of a saturated solution of a modifier, which modifier is deposited on the grains of the catalyst. While the octane number obtained after processing gasoline fraction rises to 83-92 (p. by the motor method).P R I m e R 1. As the catalyst used ball aluminosilicate zeolite-containing catalyst, to whom he or pass-through by pass the solution of the modifier.As a modifier use a solution of alumnirelations with aluminizirovannom in the ratio of 30:50 mixture of acetone with toluene in the ratio of 50:50.Feed rate modifier is 0.3 cm3/cm3hAfter treatment of the catalyst with a solution of the modifier catalyst calcined to 550aboutC for 3 hAs a source of raw materials for use reforming a gasoline fraction with the following characteristics. The boiling temperature of 50-70aboutWith the density of 138 kg/m3the refractive index nd201,2309, the octane rating of 68.2 p. (M. M.).Reforming of gasoline fractions spend on running the installation at atmospheric pressure and elevated temperature.After reforming get gasoline fraction having a density = 744 kg/m3the refractive index nd201,4330, octane 90,2.P R I m m e R 2. As the catalyst used ball zeolite-containing catalyst, which is heated to 600aboutC and calcined for 5 hours and Then the catalyst was cooled to 70-80aboutAnd through it pass the modifier. As a modifier use a solution SUP>3/cm3hAfter treatment of the catalyst with a solution of modifier its calcined to 550aboutC for 3 hours then the system is switched to the mode of reforming of gasoline fractions. As feedstock take a gasoline fraction with a boiling point is 50-170aboutWith density 738 kg/m3, a refractive index of nd201,239, octane 70,1 (n (m m).After reforming of gasoline fractions get gasoline with an octane rating equal to 85.5 (n (m m), a refractive index of nd201,4300.The results of further research are given in the table.Thus, the proposed method allows to obtain a gasoline fraction superior quality with higher octane number (to 90.2) and refractive index (up 1,4330). METHOD of producing high OCTANE GASOLINE by reforming of gasoline fractions in the presence of a zeolite catalyst at elevated temperature and atmospheric pressure using a pre-treatment of the catalyst with a solution of modifier - complexes derived siloxane with a metal, wherein the pre-treatment is carried out by passing SUP>C for 1 to 3 h, with the feed rate of solution of the modifier withstand more speed evaporation.
FIELD: petroleum processing catalysts.
SUBSTANCE: invention related to hydrofining of hydrocarbon mixtures with boiling range 35 to 250оС and containing no sulfur impurities provides catalytic composition containing β-zeolite, group VIII metal, group VI metal, and possibly one or more oxides as carrier. Catalyst is prepared either by impregnation of β-zeolite, simultaneously or consecutively, with groups VIII and VI metal salt solutions, or by mixing, or by using sol-gel technology.
EFFECT: increased isomerization activity of catalytic system at high degree of hydrocarbon conversion performed in a single stage.
40 cl, 2 tbl, 19 ex
FIELD: powder metallurgy; method of impregnation by a metal(of VIII group) of a molecular sieve extrudate with cementing material with the help of ion exchange with an aqueous solution of metal salt of VIII group.
SUBSTANCE: the invention presents a method of impregnation by metal of VIII group of an extrudate of a molecular sieve with cementing material, in which the cementing material represents a refractory oxidic material with a low acidity, practically free of aluminum oxide, using: a) impregnation of porous volume of an extrudate of a molecular sieve with cementing material with an aqueous solution of nitrate of the corresponding metal of VIII group with pH from 3.5 up to 7, in which the molar ratio between cations of a metal of VIII group in a solution and a number of centers of the adsorption available in the extrudate, is equal to or exceeds 1; b) drying of the produced at the stage a) extrudate of the molecular sieve with the cementing material. The technical result is good distribution of the metal and a short period of drying.
EFFECT: the invention ensures good distribution of the metal and a short period of drying.
9 cl, 1 tbl, 4 ex
FIELD: inorganic compounds technologies.
SUBSTANCE: invention aims at reducing concentration of NOx and N2O in residual gas and provides a method wherein residual gas escaping absorption column, prior to enter turbine, is passed through two consecutive steps first reducing NOx content by catalytic reduction and then reducing N2O content by decomposing it into nitrogen and oxygen on catalyst containing one or more iron-loaded zeolites at working pressure 4-12 bar. Molar ratio NOx/N2O in residual gas before second step lies within a range of 0.001 to 0.5.
EFFECT: enhanced process efficiency.
10 cl, 2 dwg, 1 tbl, 2 ex
FIELD: production of catalysts.
SUBSTANCE: proposed method is used for production of catalyst containing zeolite and heat-resistant oxide binder at low acidity practically containing no aluminum; proposed method includes the following operations; (a) preparation of mass suitable for extrusion and containing homogeneous mixture of zeolite, water, binder of heat-resistant binder at low acidity which is present as acid sol and aminocompounds; (b) extrusion of mass obtained at stage (a) suitable for extrusion; (c) drying extrudate obtained at stage (b); and (d) calcination of dried extrudate obtained at stage (c).
EFFECT: increased strength of catalyst at high resistance to crushing.
10 cl, 1 tbl, 2 ex
FIELD: gas treatment.
SUBSTANCE: invention relates to reducing content of NOx and N2O in process and emission gases. Apparatus comprises at least one catalyst bed divided into two reaction zones. Catalyst consists of one or several iron-loaded zeolites. First reaction zone is used to destroy NOx and the second one to reduce N2O. Between the two zones, there is a means to introduce NH3 gas. N2O and NOx-containing gas is passed through first reaction zone at 350-500°C to remove N2O and then, after addition of NH3, through second reaction zone. Amount of NH3 added should be sufficient to reduce NOx.
EFFECT: accelerated impurities conversion and reduced process cost.
17 cl, 2 dwg, 1 tbl
FIELD: chemical industry; methods of production of zeolite.
SUBSTANCE: the invention is pertaining to chemical industry, in particular, to the method of production of zeolite. The method of production of ZSM-5 type zeolite provides for mixing in water of the initial components: silicon, additional members, alkali and seeding agents; realization of the crystallization, the ion exchange, separation of the produced mashes, modifications, granulation, drying, annealing; withdrawal of the main components from the waste waters. The method differs by the fact, that as the source of silicon or its part they apply silica gel extracted from the own local production process as a result of settling from the alkaline waste water outflow by the acidic flow. Then the alkaline waters after filtration and washing of Na-form zeolite are neutralized by the acid waters containing the additional components and produced at the stage of the filtration after the ion exchange. The method allows to use the waste waters of the own production of ZSM-5-type zeolite for production of silica gel, recoverable during the production in the capacity of a source component.
EFFECT: the invention ensures production of ZSM-5-type zeolite and silica gel from the waste waters of the own production of ZSM-5-type zeolite.
17 cl, 6 ex
FIELD: petrochemical process catalysts.
SUBSTANCE: group of inventions relates to conversion of hydrocarbons using micro-mesoporous-structure catalysts. A hydrocarbon conversion process is provided involving bringing hydrocarbon raw material, under hydrocarbon conversion conditions, into contact with micro-mesoporous-structure catalyst containing microporous crystalline zeolite-structure silicates composed of T2O3(10-1000)SiO2, wherein T represents elements selected from group III p-elements and group IV-VIII d-elements, and mixture thereof, micro-mesoporous structure being characterized by micropore fraction between 0.03 and 0.40 and mesopore fraction between 0.60 and 0.97. Catalyst is prepared by suspending microporous zeolite-structure crystalline silicates having above composition in alkali solution with hydroxide ion concentration 0.2-1.5 mole/L until residual content of zeolite phase in suspension 3 to 40% is achieved. Thereafter, cationic surfactant in the form of quaternary alkylammonium of general formula CnH2n+1(CH3)3NAn (where n=12-18, An is Cl, Br, HSO4 -) is added to resulting silicate solution suspension and then acid is added formation of gel with pH 7.5-9.0. Gel is then subjected to hydrothermal treatment at 100-150°C at atmospheric pressure or in autoclave during 10 to 72 h to produce finished product.
EFFECT: enlarged assortment of hydrocarbons and increased selectivity of formation thereof.
16 cl, 2 dwg, 2 tbl
FIELD: petrochemical process catalysts.
SUBSTANCE: invention provides paraffin isomerization catalyst containing platinum or palladium and γ-alumina as binding material and zeolite selected from zeolite beta and/or ZSM-5, zeolite beta and/or mordenite, and mesoporous aluminosilicate of the type Al-MCM-41 at following proportions: platinum and/or palladium 0.2-0.3%, zeolite (beta and/or ZSM-5, beta and/or ZSM-12, beta and/or mordenite) 30-60%, mesoporous aluminosilicate 5-20%, and γ-alumina the rest. In another embodiment, catalyst contains composite material BEA/Al-MCM-41, which is mixture of zeolite beta and mesoporous aluminosilicate Al-MCM-41 at following proportions: platinum and/or palladium 0.2-0.3%, composite material BEA/Al-MCM-41 30-60%, zeolite (ZSM-5 or ZSM-12, or mordenite) 0-10%, and γ-alumina the rest.
EFFECT: increased catalyst stability and selectivity with regard to 2,2-dimethylbutane, and reduced catalyst preparation time.
2 cl, 1 tbl, 25 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: gas treatment.
SUBSTANCE: invention relates to catalytic treatment of natural gas to remove higher hydrocarbons and sulfur compounds contained therein while simultaneously converting hydrocarbons into aromatics and methane. Catalyst comprises crystalline aluminosilicate expressed by molar ratio in following way: xQ : (0.01-0.1)M2O : (0-0.08)Z2O3 : SiO2 : (0.0001-0.5)Me, wherein Q denotes tetrapropylammonium bromide; Z aluminum, gallium, or mixture thereof; x = 0-0.5; M represents at least proton or metal cation selected from sodium and potassium cations; and Me is at least one metal selected from zinc and copper. Preferably, zeolite H-ZSM-5 is employed and gas is treated at temperature above 600°C and pressure, which is prevalent in gas transportation pipelines.
EFFECT: improved gas treatment process.
5 cl, 5 tbl, 14 ex
FIELD: petrochemical processes.
SUBSTANCE: high-octane fuels and propane-butane fraction are obtained via conversion of hydrocarbon feedstock on contact with hot catalyst placed in reactor, into which diluting gas is supplied at elevated pressure. Catalyst is Pentasil-type zeolite with general formula xM2/nO,xAl2O3,ySiO2,zMe2/mO wherein M represents hydrogen and/or metal cation, Me group II or VII metal, n is M cation valence, m is Me metal valence, x, y, z are numbers of moles of Al2O3, SiO2, and Me2/mO, respectively, and y/x and y/z ratios lie within a range of 5 to 1000. Metal oxide Me2/mO is formed during calcination, in presence of oxygen, of Me-containing insoluble compound obtained in zeolite reaction mixture.
EFFECT: increased octane number of gasoline fractions with propane-butane fraction as chief component of gas products, and prolonged inter-regeneration time of catalyst.
11 cl, 4 dwg, 3 tbl, 16 ex