A method of processing vacuum gas oil

 

(57) Abstract:

Usage: petrochemistry. The essence of a vacuum gas oil is subjected to catalytic cracking in the presence of the resulting zeolite-containing catalyst. In the bottom of a glass reactor additionally serves low-octane gasoline fraction containing not more than 500 ppm of sulfur obtained as a by-product plants deep desulfurization of straight-run diesel fractions. The technical result is an increase in the production of gasoline components by reducing sulfur in the cracking gasoline. table 1.

The invention relates to a method of processing vacuum gas oils and can be used in the oil industry.

There is a method of carrying out catalytic cracking of vacuum gas oil in a fluidized bed resulting zeolite-containing catalyst (FCC) Its disadvantage is the high sulfur content in the cracking gasoline in the absence of Hydrotreating raw material, which creates problems when compounding modern brands of high-octane gasoline. /Cracking of oil fractions over zeolite catalysts. Ed. by S. N. Hadjiev. -M.: Chemistry, 1982, S. 280/.

The closest solution is information for catalytic cracking fluidized bed of regenerated zeolite-containing microspherical catalyst, containing 5-10% octane additives of the type ZSM-5, and to increase the octane number (PTS) the cracking of gasoline in the bottom of the Elevator-reactor serves 5-10 wt.% gasoline fraction of thermal origin (SU 1715823 A1, 29.02.92).

The disadvantages of the method adopted for the prototype, are reduced output cracking gasoline from the amount in the Elevator-reactor gasoline fraction (increase production at the facility FCC cracking of gasoline to 1% with the addition of a reactor up to 10% gasoline fraction), and the need to use special octane additives for FCC catalysts.

The purpose of this invention is to increase the yield of cracking gasoline while reducing the sulfur content.

This goal is achieved by a method, according to which the bottom of a glass reactor should be provided with low-octane gasoline fraction containing not more than 500 ppm of sulfur and obtained as a by-product plants deep desulfurization of straight-run diesel fractions for obtaining clean diesel fuels.

Conducting way catalytic conversion of vacuum gas oil according to the proposed technical solution allows to reduce the content the century

A distinctive feature of the proposed method compared with the method adopted for the prototype, is fed into the bottom of a glass reactor low-octane gasoline fraction, a by-product plants deep desulfurization of straight-run diesel fractions containing not more than 500 ppm of sulfur.

Thus, the claimed method meets the criteria of the invention of "novelty."

The method is as follows. Carry out catalytic cracking of vacuum gasoil FR. 350 - 500oC in the presence of zeolite-containing microspherical catalyst (LA-250, FUTURA - 110 or other). In the bottom of a glass reactor additionally serves in the amount of 3-10 wt.% taken from vacuum gasoil low-octane gasoline frakie containing not more than 500 ppm sulfur (PTS m m 50-55 points, fractional composition: 10% boils at 100-110oC, 50% at 170-180oC) and obtained as a by-product plants deep desulfurization of straight-run diesel fractions for obtaining clean diesel fuels. The increase in the production of high-octane components of gasoline is 1.3 - 2.7 wt.%, the content of sulfur in the cracking gasoline is reduced by 5-15 Rel.% than the analysis of the known technical solutions according to the methods of processing vacuum gas oil allows to make a conclusion about the absence of these signs, similar to the essential distinctive features of the claimed process, i.e. the compliance of the proposed method to the requirements of inventive step.

The advantages of the proposed method are illustrated by the following examples.

Example 1. Dehydroacetic vacuum gasoil West Siberian oil (up to 360oC boils 3 wt.%, 95% - 485oC, cocking behavior 0.1 wt.%) subjected to catalytic cracking in the presence of industrial microspheric zeolite catalyst YES-250 (bulk density 978 kg/m3conversion (MAT) and 67.8 %, coke 0,21%, granulometric composition, wt.%: more than 200 μm - 5; 160-200 μm - 7; 100-160 µm - 23; 60-100 μm - 43; less than 60 μm - 20).

In the bottom of a glass reactor additionally serves in the amount of 3 wt.% taken from vacuum gasoil low-octane gasoline fraction containing 490 ppm sulfur and obtained as a by-product plants deep desulfurization of straight-run diesel fractions for obtaining clean diesel fuels.

The parameters and characteristics of the fractions in the table.

Example 2. Dehydroacetic vacuum gasoil West Siberian oil according to example 1 is subjected to kataliticheskaya density 932 kg/m3; conversion (MAT) to 70.1 %, coke 0,12%, granulometric composition, wt. %: more than 150 μm - 9; 80-150 μm - 30; 40-80 μm - 46,; less than 40 μm - 15).

In the bottom of a glass reactor additionally serves in an amount of 10 wt.% taken from vacuum gasoil low-octane gasoline fraction containing 170 ppm sulfur and obtained according to example 1.

The parameters and characteristics of the fractions in the table.

Example 3. Dehydroacetic vacuum gasoil West Siberian oil according to example 1 is subjected to catalytic cracking in the presence of industrial microspherical ceritadewasa catalyst YES-250 according to example 1.

In the bottom of a glass reactor additionally serves in an amount of 5 wt.% taken from vacuum gasoil low-octane gasoline fraction containing 230 ppm of sulfur and obtained according to example 1.

The parameters and characteristics of the fractions in the table.

Example 4. Dehydroacetic vacuum gasoil West Siberian oil according to example 1 is subjected to catalytic cracking in the presence of equilibrium industrial microspheric zeolite catalyst YES-250 without a supply of low-octane gasoline fraction to the bottom of the glass reactor.

A method of processing vacuum gas oil catalytic cracking in the presence of microspheric zeolite catalyst, characterized in that in the bottom of a glass reactor should be provided with low-octane gasoline fraction containing not more than 500 ppm of sulfur and obtain as a by-product plants deep desulfurization of straight-run diesel fractions.

 

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FIELD: petroleum refining industry; production of engine fuels.

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2 tbl, 8 ex

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SUBSTANCE: invention, in particular, relates to catalytic process for processing hydrocarbon stock corresponding to diesel fuel composition and having low pour point to produce diesel fuel with low pour point. More specifically, hydrocarbon fraction 160-360°C is fed into reactor with fixed catalyst bed at temperature at least 200°C and pressure up to 1 MPa, said catalyst being zeolite of the aluminosilicate, galloaluminosilicate, gallosilicate, ironaluminosilicate, or chromoaluminosilicate type selected from ZSM-5, ZSM-11, ZSM-12, ZSM-22, ZSM-23, ZSM-35, ZSM-48, mordenite, and NETA pretreated with organic or inorganic acid solutions.

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SUBSTANCE: petroleum light cuts are fed into catalyst cracking reaction; brought into contact with regenerated catalyst at temperature of 200-450°C, pressure of 0.1-0.5 MPa for 1-20 s followed by separation of reaction products. Stripped catalyst is regenerated for 10-50 min at temperature of 400-600°C and pressure of 0.1-0.6 MPa. Regenerated catalyst is recycled into reactor.

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SUBSTANCE: catalyst represents a mixture comprising: particulate catalyst prepared by homogenously dispersing crystalline aluminosilicate zeolite in inorganic oxide matrix and particulate additive-type catalyst deactivating metals impairing catalyst and contained in oil feedstock, un which catalyst calcium carbonate with average particle diameter 0.001 to 30 μm is dispersed in inorganic matrix through which amount of said calcium carbonate achieved 30 to 70% based on dry material. Ratio of catalyst to additive-type catalyst ranges between 99.9:1 and 50:50. Catalyst shows excellent cracking power and is able to process petroleum distillation residues.

EFFECT: increased catalytic activity and prolonged lifetime.

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EFFECT: the invention ensures the controlled raise of the loose mass in the given above range, the increase of activity and improvement of the mechanical properties of the bead catalyst.

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1 tbl, 4 ex

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Olefin production // 2320704

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SUBSTANCE: invention relates to olefin-containing hydrocarbon stock steam cracking process ensuring elevated content of light olefins in stream leaving steam cracking process, which process comprises passing first hydrocarbon feedstock containing one or more olefins through catalytic cracking reactor containing crystalline silicate to form intermediate stream containing olefins having lower molecular mass than in starting feedstock; fractionation of intermediate stream of form fraction with lower carbon atom number and fraction with higher carbon atom number followed by passing fraction with higher carbon atom number, as second hydrocarbon feedstock, through steam cracking installation to produce stream leaving steam cracking installation. Invention further relates to steam cracking process of olefin-containing hydrocarbon stock, which comprises passing first hydrocarbon feedstock containing one or more olefins and further containing one or more of the following: crude hydrotreated stock C4, light catalytic cracking gasoline, refined stock 2, refined stock 1, refined stock 2 from methyl tert-butyl ether or ethyl tert-butyl ether synthesis installation, olefin metathesis installation raffinate, hydrotreated olefin-containing stream from fluid-catalytic cracking plant or light cracking plant, or delayed cocking plant, through reactor containing crystalline silicate to form intermediate stream containing olefins having lower molecular mass than in starting feedstock and passing this intermediate stream, as second starting hydrocarbon feedstock, through steam cracking installation to produce stream leaving steam cracking installation. Invention also discloses olefins-containing hydrocarbon stock steam cracking process comprising steam cracking of the first hydrocarbon feedstock including paraffin-containing hydrocarbon stock, steam cracking of the second hydrocarbon feedstock containing hydrocarbons C4 and hydrocarbons with higher molecular mass, the second hydrocarbon feedstock containing one or more olefins and including lower fraction of intermediate stream obtained by catalytic cracking of a third hydrocarbon feedstock in reactor containing crystalline silicate to form intermediate stream containing olefins with lower molecular mass than that in the third feedstock, after which two streams leaving steam cracking process are combined to produce combined stream.

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