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Catalysis conversion method for producing aromatic compounds

An aromatic compound, catalytic conversion method technology, applied in catalytic cracking, cracking, petroleum industry and other directions, can solve problems such as a large amount of coke, and achieve the effect of increasing the space velocity of the raw material, reducing the viscosity of the feed, and improving the reaction rate of impurity removal.

Active Publication Date: 2014-07-16
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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Problems solved by technology

The disadvantage of this method is that the direct catalytic cracking of light cycle oil or partially saturated hydrogenated aromatic mixture will cause a large amount of hydrogen transfer reaction to generate a large amount of coke

Method used

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  • Catalysis conversion method for producing aromatic compounds

Examples

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Effect test

Embodiment 1

[0048] This example illustrates the product distribution and product properties of raw materials treated by a medium-sized catalytic cracking unit and a medium-sized residual oil hydrotreating unit using the method provided by the present invention.

[0049] The raw oil entering the residual oil hydrogenation unit is a mixture of vacuum residual oil and catalytic cracking heavy cycle oil, and the mass ratio of the two is 90:10. The test conditions for residual oil hydrogenation are: hydrogen partial pressure 14.2MPa, reaction temperature 400℃, hydrogen-oil ratio 1000Nm 3 / m 3 , the airspeed is 0.28h -1 .

[0050] Hydrogenated diesel oil (distillation range 200-380°C) is used as the raw material for catalytic cracking. The test conditions for catalytic cracking are: reaction temperature 590°C, agent-oil ratio 10:1, water-oil ratio 0.2, and reaction time 4.6 seconds.

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Abstract

The invention relates to a catalysis conversion method for producing aromatic compounds. According to the method, poor quality heavy cycle oil and residual oil are subjected to a hydrotreating reaction in the presence of hydrogen gas and a hydrogenation catalyst, and the reaction products are separated to obtain gas, naphtha, hydrogenated diesel oil and hydrogenated residue oil, wherein the hydrogenated diesel oil enters a catalysis cracking device and is subjected to a cracking reaction in the presence of a catalysis cracking catalyst, the reaction products are separated to obtain dry gas, liquefied gas, catalytic gasoline containing rich benzene, toluene and xylene, catalytic light diesel oil, distillates with a distillation range of 250-450 DEG C, and an oil slurry, and the distillates with the distillation range of 250-450 DEG C are conveyed to a residue oil hydrotreating device so as to be recycled. According to the present invention, the residue oil hydrogenation condition is completely utilized to achieve saturation of the aromatic ring in the poor quality heavy cycle oil to the maximal degree, such that the hydrogenated diesel oil maximally produce benzene, toluene and xylene during catalysis cracking.

Description

technical field [0001] The invention relates to a catalytic conversion method for producing high-value chemical products, more specifically, a catalytic conversion method for producing benzene, toluene and xylene from inferior heavy cycle oil. Background technique [0002] With the development of heavy crude oil and the rapid growth of market demand for light oil products, in my country, catalytic cracking technology, which is used to lighten heavy oil, has developed rapidly. However, a fact that must be faced is that the quality of FCC diesel has always been relatively poor, with high density, high aromatic content, and low cetane number. It is difficult to meet increasingly stringent diesel specifications even through diesel hydro-upgrading technology. Paraxylene is an important raw material for the polyester industry, mainly used to produce purified terephthalic acid (PTA) or purified dimethyl terephthalate (DMT), and then produce polyester (PET) from PTA and DMT. It may...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G69/04C10G49/04C10G11/04
Inventor 龚剑洪龙军杨哲蒋东红崔守业
Owner CHINA PETROLEUM & CHEM CORP
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