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Method for producing hydrocarbon fractions

a technology of hydrocarbon fractions and hydrocarbon oil, which is applied in the field of hydrocarbon fraction production methods, can solve the problems of not being able to preferentially produce btx, difficult to blend a large amount of these fractions, and limited feed for the catalytic reforming process, etc., and achieves the effects of low cost, reduced activity, and high selectivity

Inactive Publication Date: 2009-12-24
JAPAN ENERGY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0028]According to the method for producing hydrocarbon fractions of the present invention, high-boiling-point hydrocarbon fractions are converted into low-boiling-point hydrocarbon fractions, and also high value-added alkylbenzenes (monocyclic aromatic hydrocarbons) represented by BTX are efficiently produced by using a hydrocarbon oil containing a large amount of polycyclic aromatic hydrocarbons as a feed and contacting the hydrocarbon oil with an optimal hydrocracking catalyst in the presence of hydrogen, while avoiding catalyst poisoning. In addition, since a hydrocracking catalyst which is most suitable for the hydrocracking and has a specified composition and specified properties suitably balanced in hydrocracking activity and hydrogenation activity is used, gas generation by excessive cracking can be controlled and a decrease in the activity by coking due to insufficiency of hydrogenation activity can be suppressed. In addition to the capability of producing alkylbenzenes at a high efficiency and a high selectivity, an LPG fraction, a gasoline fraction, a kerosene fraction, a gas oil fraction, a non-aromatic naphtha fraction, and a monocyclic aromatic hydrocarbons can be obtained by separating the resulting hydrocracked oil using an appropriate known method. These fractions can be effectively used as a low-sulfur-content LPG blending stock, a high-octane-number low-sulfur-content gasoline blending stock, a low-sulfur-content kerosene blending stock, a high-cetane-number low-sulfur-content gas oil blending stock, a low-sulfur-content non-aromatic naphtha stock and a petrochemical feed and contribute to a reduction of environmental load.

Problems solved by technology

However, the feed for the catalytic reforming process is limited to naphtha fractions having the same boiling point range, whereby restrained quantitatively.
Therefore, it is difficult to blend a large amount of these fractions.
However, the proposed method is still just a technique for producing gas oil and kerosene.
This is not such a technology that reduces the molecular weight of the polycyclic aromatic compounds and converts the compounds even into a feed for petrochemical.
This is not a method for preferentially producing BTX.
This is thus not a method for selectively producing monocyclic aromatic hydrocarbons.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0095]A light fraction (feed A) prepared by fractionating a light cycle oil (LCO) into two fractions at 240° C. was used for a hydrocracking reaction using the catalyst A under a reaction pressure of 3.0 MPa, LHSV of 1.0 h−1, hydrogen / oil ratio of 1,400 NL / L, and a reaction temperature of 380° C. The properties of the feed A are shown in Table 1 and the properties of the product oil are shown in Table 2. In Table 2, the conversion rate of 215° C. or higher fractions is a value obtained by the following equation.

Conversion rate of 215° C. or higher fractions (%)=100-215° C. or higher fractions in product oil (vol %) / 215° C. or higher fractions in feed (vol %)×100

[0096]The ratio of the aromatic ring-constituting carbon ratio of the hydrocracked oil to the aromatic ring-constituting carbon ratio of the feed (aromatic ring carbon remaining ratio) is also shown in Table 2. The reaction liquid yield is the residual ratio (wt %) of the fractions with 5 or more carbon numbers after the reac...

example 2

[0097]The hydrocracking reaction was carried out under the same conditions as in Example 1 except for the reaction temperature of 400° C. The properties of the product oil obtained by the reaction are shown in Table 2.

example 3

[0098]The hydrocracking reaction was carried out under the same conditions as in Example 1 except for the LHSV of 0.5 h−1. The properties of the product oil obtained by the reaction are shown in Table 2.

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PUM

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Abstract

A method for producing an LPG fraction, a gasoline fraction, a kerosene fraction, a gas oil fraction, monocyclic aromatic hydrocarbon and a non-aromatic naphtha fraction from hydrocracked oil includes hydrocracking hydrocarbon oil containing polycyclic aromatic hydrocarbon to convert into a light hydrocarbon fraction, and efficiently and selectively producing monocyclic aromatic hydrocarbon with higher valuable alkylbenzenes. The method for producing hydrocarbon fraction comprises subjecting hydrocarbon feedstock containing polycyclic aromatic hydrocarbon and in which the ratio of carbons constituting an aromatic ring to the total carbons in the hydrocarbon oil (the aromatic ring-constituting carbon ratio) is 35 mole % or more to catalytic cracking in the presence of hydrogen. 40% or more of a fraction with a boiling point of 215° C. or higher in the hydrocarbon feedstock is converted into a fraction with a boiling point lower than 215° C., producing hydrocracked oil containing 30 vol % or more of monocyclic aromatic hydrocarbon.

Description

TECHNICAL FIELD[0001]The present invention relates to a method for producing various hydrocarbon fractions by hydrocracking specific hydrocarbon oils containing polycyclic aromatic hydrocarbons. More particularly, the present invention relates to a method for producing hydrocarbon fractions by obtaining a hydrocracked oil which selectively contains a large amount of monocyclic aromatic hydrocarbons and then efficiently producing light hydrocarbon fractions such as an LPG fraction, a gasoline fraction, a kerosene fraction, a gas oil fraction, a non-aromatic naphtha fraction, and a monocyclic aromatic hydrocarbon.BACKGROUND ART[0002]In recent years, the demand of petroleum products tends to lighten, particularly, petrochemical feeds represented by BTX (benzene, toluene, and xylene), is increasing more and more. Furthermore, in addition to BTX, aromatic hydrocarbons are widely used as a gasoline blending stock due to the generally high octane value. A fluid catalytic cracking process c...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10G47/04C10G47/12C10G47/16C10G47/20
CPCB01J21/06C10G2400/30B01J21/12B01J21/14B01J23/10B01J23/24B01J23/30B01J23/74B01J27/053B01J29/48B01J35/10B01J35/1019B01J35/1023B01J35/1061B01J35/108B01J2229/42C10G47/12C10G47/16C10G69/04C10G69/06C10G2300/4018C10G2300/1096C10G2300/301C10G2400/02C10G2400/06C10G2400/08C10G2400/28B01J21/08B01J35/617B01J35/60B01J35/615B01J35/66B01J35/647C10G45/12B01J29/076
Inventor MATSUSHITA, KOICHI
Owner JAPAN ENERGY CORP
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