The method of producing gasoline

 

(57) Abstract:

Usage: oil refining and petrochemical industry. The essence of a vacuum gas oil is subjected to cracking in the presence of the zeolite catalyst and additives - oligomers of ethylene WITH20-C24that is a byproduct of the production process, olefins, in the amount of 0.05 to 4.0 wt. %. The technical result is an increase in the yield of the target product. table 1.

The invention relates to a method for producing gasoline and can be used in the oil industry.

There is a method of processing vacuum gas oil by catalytic cracking in the presence of the zeolite catalyst and an organic additive - resin reforming [Patent 2054026 (RF). Kudinov, A. C., Ryabov Century BC, Suverov C. M. and other processing vacuum gas oil. Publ. in B. I.]. The disadvantage of a small yield of gasoline.

The closest technical solution to the claimed invention (the prototype) is a method of producing gasoline by cracking of vacuum gas oil in the presence of the zeolite catalyst and heavy oil coking in the amount of 2,3...2.8 wt.% [A. S. 1659450 (USSR) M. S. Hasanov, Astatichno high yield of gasoline.

The objective of the invention is to increase the yield of the target product.

This task is solved in that in the known method of producing gasoline by catalytic cracking of vacuum gas oil in the presence of the zeolite catalyst and the additive as an additive use oligomers of ethylene C20-C24that is a byproduct of the production process, olefins, in the amount of 0,05...4.0 wt.%. Oligomers of ethylene20-C24that is a byproduct of the production of olefins, obtained, for example, in the production of olefins by oligomerization of ethylene in the presence of triethylamine [Higher olefins. Production and use. /Ed. by M. A. Dalina. - L. : Chemistry, 1984, - 264 S.].

Oligomers of ethylene C20-C24due to the addition of the proton to the double bond at high speed to form on the surface of the catalyst Carbonia ions, thereby initiating the reaction of cracking molecules of the feedstock.

The method is as follows.

In vacuum gasoil add oligomers of ethylene in the amount of 0,05...4,0 wt. % and after thorough mixing are used as feedstock for catalytic cracking.

The effect of increasing the output of eriden the following examples.

Example 1. to 9.9 g of a vacuum gas oil having the following physicochemical properties:

Density, kg/m3- 885

Fractional composition,oC:

NC - 315

350oC, wt.% - 21

500oC, wt.% - 96

Pour point,oC - 19

Group hydrocarbon composition, wt.%:

Paravinogradovite - 67

Monocyclic aromatic - 8

Bicyclic aromatic - 12

Polycyclic aromatic - 17

Resin - 6

mixed with 0.1 g of oligomers of ethylene C20-C24(1 wt.% for raw materials), whose properties are listed below.

Mass fraction of olefins, %:

C18- 0,6

C20to 58.2

C22- 29,9

C24- 8,9

C26- 2.4GHz

Mass fraction of paraffins, % - 4

The resulting mixture was thoroughly mixed and used as feedstock for catalytic cracking fluidized bed of zeolite catalyst at 500oC, mass velocity 7 h-1. The product yield of the process is given in the table (the amount of additive 1 wt.%).

Example 2-7. Vacuum gas oil whose properties are given in example 1, is subjected to catalytic cracking under the same conditions as in the above example, prior the additives listed in the same table. There the data by a known method.

The table shows that the proposed method can improve the yield of gasoline from 48.1 to 50.5 wt.%. The most preferred concentration of the additive is from 0.05 to 4.0 wt.%. When the additive concentration is less than 0.05 wt.% the effect of increasing the yield of gasoline is negligible, and if the additive concentration is more than 4 wt. % further increase in the content of the additive does not significantly increase the yield of gasoline.

The proposed method can be used in the catalytic cracking of vacuum gas oil.

The method of producing gasoline by cracking of vacuum gas oil in the presence of the zeolite catalyst and additives, characterized in that the additive is used oligomers of ethylene WITH20-C24that is a byproduct of the production process-olefins in amounts of 0.05 to 4.0 wt.%.

 

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FIELD: petroleum refining industry; production of engine fuels.

SUBSTANCE: the invention is pertaining to the field of petroleum refining industry, in particular, to production of engine fuels. Substance: the method provides for carrying out a catalytic cracking of petroleum fractions in presence of platinumzeolite-bearing rare-earth aluminum-silicate catalyst. The used catalyst consists of 5-20 mass % of "Y" zeolite with a molar ratio of silicon oxide to aluminum oxide within 4.5-9.5 and 80-95 mass % of the silica-alumina base in turn consisting of 40-95 mass % of amorphous aluminosilicate and 5-60 mass % of clay, and having a chemical composition, in mass %: aluminum oxide - 4.5-40.0, oxides of rare earths - 0.5-4.0, platinum - 0.0001-0.01, sodium oxide - 0.01-0.5, silicon oxide - the rest. The technical result: increased output of a gasoline fraction.

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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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10 cl, 6 tbl, 1 dwg, 4 ex

FIELD: petroleum processing.

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.

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3 cl, 8 dwg, 11 tbl, 14 ex

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6 ex, 1 tbl, 1 dwg

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EFFECT: enhanced efficiency.

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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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6 cl, 1 ex, 2 tbl, 1 dwg

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