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Hydrocracking technological method for processing inferior raw material

A technology of hydrocracking and process method, applied in hydrotreating process, petroleum industry, treatment of hydrocarbon oil, etc., can solve the problem of reducing the volume space velocity of refining section, and achieve the reduction of overall investment, low operating cost and energy consumption. Effect

Active Publication Date: 2015-04-01
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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Problems solved by technology

Although it is possible to process low-quality hydrocracking raw materials and reduce the impact of ammonia partial pressure on the hydrocracking unit, it is still essentially a process of connecting two refining reactors in series, which substantially reduces the refining capacity for the impurity removal reaction. The volumetric space velocity of the section is the bottleneck to increase the throughput of the device

Method used

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  • Hydrocracking technological method for processing inferior raw material

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Embodiment 1

[0032] use figure 1 In the process flow shown, a fractionation tower is added between the conventional hydrocracking unit and the hydropretreatment unit, and the production is carried out by adopting the operation mode of feeding the cracking section in stages. The catalysts used in the examples are commercial catalysts FF-36 hydrotreating catalyst and FC-14 hydrocracking catalyst developed by Sinopec Fushun Petrochemical Research Institute. The main properties of the catalysts are listed in Table 1.

[0033] The properties of the raw oil are shown in Table 2, and the hydrocracking operating conditions are shown in Table 3.

Embodiment 2

[0044] use figure 1 In the shown process flow, a fractionation tower is added between the conventional hydrocracking unit and the hydropretreatment unit, and the operation mode of feeding in stages in the cracking section is adopted for production. The properties of the catalyst used in the examples are listed in Table 1. The catalyst is a commercial catalyst developed and produced by Fushun Petrochemical Research Institute.

[0045] The properties of raw oil are shown in Table 2, and the denitrification conditions are shown in Table 4.

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Abstract

The invention relates to a hydrocracking method for processing an inferior raw material. The method comprises: passing the inferior raw material through a first hydrotreating area, and subjecting the liquid product to fractionation in a first fractionating tower; passing the obtained heavy distillate oil through a second hydrotreating area, and passing the obtained effluent and intermediate distillate generated by the fractionation to a hydrocracking area together; and leaving the cracking liquid product and light distillate generated in the fractionation to enter a second fractionating tower, thus obtaining the product. Compared with the prior art, the invention makes use of fractionation to separate out the light and intermediate distillate with a low nitrogen content from the hydrotreating product, thus reducing the space velocity of feed entering the second hydrotreating area, and also being able to properly mitigating the operation severity of the first hydrotreating area. Therefore, while meeting the demand for long-period operation treatment of the inferior raw material, the method provided in the invention also enhances the device processing capacity to the utmost. On the basis of improving the product quality, the method can achieve an ideal comprehensive processing effect.

Description

technical field [0001] The invention relates to a hydrocracking process, in particular to a hydrocracking method suitable for processing inferior raw materials. Background technique [0002] Hydrocracking technology has many advantages such as strong feedstock adaptability, flexible product scheme, high liquid product yield, and good product quality. It has been favored by oil refining companies all over the world for many years. As one of the main processes for deep processing of heavy oil, hydrocracking can not only directly produce clean motor fuels such as gasoline, coal, and diesel, but also light and heavy naphtha and hydrocracking tail oil in its products are high-quality chemical raw materials. Therefore, In recent years, hydrocracking technology has gradually developed into a bridge technology for the organic combination of oil, chemical and fiber in modern oil refining and petrochemical enterprises. At present, the world's hydrocracking production capacity has reac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00
Inventor 王仲义石友良彭冲黄新露白振民孙士可
Owner CHINA PETROLEUM & CHEM CORP
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