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Hydrogenation cracking method of high-output diesel oil from high-nitrogen content heavy raw material

A technology of hydrocracking and high nitrogen content, which is applied in the field of hydrocarbon oil cracking, which can solve the problems of increasing the load of hydrofining reactors, etc., and achieve the effects of improving the efficiency of hydrodenitrogenation, reducing the total consumption, and avoiding cracking reactions

Active Publication Date: 2007-04-04
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

Since all the effluent products of the cracking reactor enter the hydrofinishing reactor together with the raw oil in this method, the load on the hydrofinishing reactor is increased

Method used

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  • Hydrogenation cracking method of high-output diesel oil from high-nitrogen content heavy raw material

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Embodiment

[0031] The feedstock oil A used in the examples is a heavy feedstock with high nitrogen content, and feedstock oil B is a heavy feedstock with low nitrogen content. Its properties are shown in Table 1. From Table 1, it can be seen that the two feedstock oils have relatively large nitrogen content. The difference is that the nitrogen content of feed oil A is 3100 μg / g, and the nitrogen content of feed oil B is 810 μg / g.

[0032] The commercial brand numbers of the hydrorefining catalyst and hydrocracking catalyst used in the examples are RN-2 and RT-30, respectively, and they are produced by the Changling Catalyst Plant of Sinopec Catalyst Branch.

[0033] The feedstock oil A enters the first hydrorefining reactor, and the reaction product enters the hot flash tank. The liquid phase stream at the bottom of the hot flash tank and the feedstock oil B are mixed with hydrogen into the second hydrorefining reactor for hydrogenation. In the refining reaction, the weight ratio of feed oil...

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Abstract

Hydrogenation cracking method for qualified diesel oil from high-nitrogen content heavy raw oil is carried out by reacting by the first hydrogenation refining reactor, entering the reactant into thermal flash pot to gas-liquid separate, entering the separated liquid-phase flow and low-nitrogen content heavy raw oil into the second hydrogenation refined reactor, hydrogenation refine reacting, mixing effluent of the second hydrogenation refining reactor with effluent hydrogenation cracking reactor, entering into high-pressure separator, low-pressure separator and fractionating tower sequentially, separating out naphtha fraction, diesel fraction and tail-oil fraction, circulating all or part tail-oil fraction to hydrogenation cracking reactor for reacting. It's efficient and saves resources.

Description

Technical field [0001] The invention belongs to a hydrocarbon oil cracking method for obtaining low boiling point fractions in the presence of hydrogen, and more specifically, to a hydrocracking method for producing diesel fuel from heavy feedstock oil with high nitrogen content. Background technique [0002] In recent years, with the deep exploitation of global crude oil, the quality of crude oil has become worse and worse, and the relative density and sulfur content continue to rise; while the world oil market has increased demand for middle distillates (diesel and kerosene), heavy fuel oil Development in the direction of decreasing demand. Therefore, as a non-renewable energy source, the full and reasonable utilization of petroleum is an important means to implement sustainable development of resources. In my country, with the rapid development of the national economy, on the one hand, the demand for light fuel oil continues to increase, especially for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/12
Inventor 董建伟胡志海熊震霖董松涛聂红李大东
Owner CHINA PETROLEUM & CHEM CORP
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