Wax oil hydrotreating method

A treatment method, the technology of hydrogenation of wax oil, is applied in the fields of hydrogenation treatment process, hydrocarbon oil treatment, petroleum industry, etc., and can solve the problems of reduced reaction speed of raw materials, deactivation of catalytic cracking catalyst, and hindrance of other hydrocarbon adsorption, etc., to achieve The effect of reducing hydrogen consumption, increasing conversion rate and light oil yield, and improving reaction effect

Active Publication Date: 2013-01-30
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

In fact, the composition of raw materials has an important influence on the catalytic cracking reaction process. Raw materials containing more alkanes and cycloalkanes have better cracking performance. When the content of polycyclic aromatic hydrocarbons in the raw materials is large, they will be firmly adsorbed on the catalytic cracking catalyst first. on the surface, thereby hindering the adsorption of other hydrocarbons and reducing the reaction rate of the entire raw material
In addition, polycyclic aromatic hydrocarbons continue to dehydrogenate and condense to form coke, which leads to deactivation of catalytic cracking catalysts

Method used

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Embodiment 1

[0028] A kind of inferior CGO is used as raw material oil, represented by raw material oil A. The properties of the raw material are shown in Table 1. From Table 1, it can be known that the sulfur content of raw material oil A is 9900 μg / g, the nitrogen content is as high as 6700 μg / g, and the asphaltene content is as high as 6700 μg / g. The content is 0.2% by weight, and the raw material is a low-quality catalytic cracking raw material with high nitrogen and low sulfur content. The raw material A enters the hydrogenation reactor together with the hydrogen, and reacts with the hydrogenation protection agent, the hydrofinishing catalyst I and the hydrofinishing catalyst II successively, and the effluent after the reaction is cooled and separated, the hydrogen-rich gas is recycled, and the liquid product enters the The fractionation system is separated into naphtha fraction, diesel fraction and refined wax oil fraction. Based on the overall catalyst volume, the loading volume per...

Embodiment 2

[0030] A kind of inferior VGO is used as raw material oil, represented by raw material oil B. The raw material properties are shown in Table 1. From Table 1, it can be seen that the sulfur content of raw material oil A is 27000 μg / g, and the nitrogen content is as high as 1700 μg / g. The raw material is A high-sulfur and low-nitrogen catalytic cracking feedstock. The raw material B enters the hydrogenation reactor together with the hydrogen, and reacts with the hydrogenation protection agent, the hydrofinishing catalyst I and the hydrofinishing catalyst II successively, and the effluent after the reaction is cooled and separated, the hydrogen-rich gas is recycled, and the liquid product enters the The fractionation system is separated into naphtha fraction, diesel fraction and refined wax oil fraction. Based on the overall catalyst volume, the loading volume percentage of the hydrogenation protecting agent is 10%, the loading volume percentage of the hydrofining catalyst I is 4...

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Abstract

The invention relates to a wax oil hydrotreating method. According to the invention, under a hydrogenation reaction condition, a mixture of raw material oil and hydrogen is sequentially delivered into three hydrogenation reaction zones and is subjected to reactions. A first hydrogenation reaction zone is filled with a hydrogenation protective agent, and is used for removing metal, colloid and asphaltene from the raw material oil. The second hydrogenation reaction zone is filled with a hydrogenation refining catalyst I, and is mainly used for carrying out hydrodenitrogenation and polycyclic aromatic hydrocarbon partial saturation reactions. The active metal of the hydrogenation refining catalyst I is nickel-tungsten, nickel-molybdenum or nickel-molybdenum-tungsten. The third hydrogenation reaction zone is filled with a hydrogenation refining catalyst II, and is mainly used for carrying out a hydrodesulphurization reaction. The active metal of the hydrogenation refining catalyst II is cobalt-molybdenum. With the method provided by the invention, refined wax oil desulphurization rate can be improved, wax oil raw material cracking performance is improved, and conversion rate and light oil yield of a catalytic cracking device are improved.

Description

technical field [0001] The invention belongs to a method for refining hydrocarbon oil in the presence of hydrogen, more specifically, a method for hydrotreating wax oil. Background technique [0002] Fluid Catalytic Cracking (FCC) is an important process for producing gasoline components. In my country, the proportion of FCC gasoline in the gasoline pool is about 80%, and in foreign countries, this proportion has also reached 40% to 60%. FCC raw materials mainly include vacuum gas oil, coker gas oil, deasphalted oil and residual oil. The nature of the raw material has a great influence on the FCC product distribution, product properties and catalytic cracking catalyst consumption. [0003] A large number of studies and practices have shown that the most effective means to improve the quality of catalytic cracking products is to carry out hydrogenation pretreatment on catalytic cracking raw materials to improve their quality. First, through hydrogenation pretreatment of ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/04
Inventor 梁家林胡志海蒋东红吴昊龙湘云陈水银
Owner CHINA PETROLEUM & CHEM CORP
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