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Flexible hydrocracking method

A hydrocracking and flexible technology, applied in hydroprocessing process, petroleum industry, hydrocarbon oil treatment, etc., can solve problems such as difficulty in responding to changes in market demand, poor production flexibility, single product distribution, etc., and achieve product adjustment means The effects of enrichment, enhanced adaptability, and simplified process flow

Active Publication Date: 2014-12-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it has certain advantages, it has poor production flexibility and is difficult to respond to changes in market demand.
CN1488731A introduces a hydrocracking method for improving the quality of refined diesel oil, which can process inferior quality without affecting the operation of the hydrocracking unit, and improves the quality of its products. It is advanced to a certain extent, but the operation is flexible Low, product distribution is relatively simple

Method used

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  • Flexible hydrocracking method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0030] use figure 1 In the process flow shown, the flexible production is carried out according to the mixing ratio of MIP diesel oil and vacuum gas oil of 2:8, all the tail oil is recycled back to the hydrocracking reactor, and the same conversion rate in the cracking section is controlled. The properties of the catalysts used in the examples are listed in Table 1. The catalyst is a commercial catalyst developed and produced by Fushun Petrochemical Research Institute.

[0031] The properties of raw oil are shown in Table 2, and the hydrocracking operating conditions and main properties of products are shown in Table 3.

Embodiment 4～6

[0042] use figure 1 In the process flow shown, the flexible production is carried out according to the mixing ratio of MIP diesel oil and vacuum gas oil of 4:6, all the tail oil is recycled back to the hydrocracking reactor, and the same conversion rate in the cracking section is controlled. See Table 4 for hydrocracking operating conditions and main properties of products.

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Abstract

The invention discloses a flexible hydrocracking method. The method consists of: passing mixed feed of wax oil and catalytic cracking diesel oil, and hydrogen through a hydrotreating reactor, and leaving the hydrotreating effluent to enter a first separator to undergo gas-liquid separation; making part of or the total hydrotreating generated oil enter a second separator to undergo gas-liquid separation, and fractionating the liquid, thus obtaining a light product and tail oil; returning the tail oil to the hydrotreating reactor and a hydrocracking reactor respectively to undergo reaction, and letting the hydrocracking effluent enter the second separator. By adjusting the blending proportion of the catalytic cracking diesel oil and the wax oil, and the distribution proportion of the hydrotreating generated oil, flexible adjustment of the hydrogenation product quality and yield can be realized, especially the yield proportion adjustment of high arene heavy naphtha and low-sulfur diesel oil, and nature control. On the basis of improving product quality, the method provided in the invention can achieve an ideal comprehensive processing effect and can further enhance the raw material adaptability.

Description

technical field [0001] The invention relates to a flexible hydrocracking method, which mainly refers to the flexible series connection of a fractionation system and a reaction system of a hydrocracking unit for processing low-quality catalytic diesel raw materials and maximizing the production of high value-added gasoline and diesel products. Background technique [0002] Hydrocracking is a catalytic conversion process in which heavy distillate oil undergoes hydrogenation, desulfurization, denitrogenation, rearrangement of molecular skeleton structure and cracking in the presence of high temperature and high pressure hydrogen and catalyst. It has many advantages such as strong raw material adaptability, flexible product scheme, high yield of liquid products, 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00
Inventor 王仲义彭冲潘德满石友良吴子明孙士可
Owner CHINA PETROLEUM & CHEM CORP
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