Hydrotreating method for producing low-sulphur and ultra-low sulphur diesel oil

A technology of ultra-low sulfur diesel oil and hydrotreating, which is applied in hydrotreating process, hydrocarbon oil treatment, petroleum industry, etc. It can solve the problems of not taking into account, low space velocity, low diesel yield and so on, so as to avoid saturation of aromatic hydrocarbons , Improve the yield of diesel oil, reduce the effect of reaction hydrogen consumption

Inactive Publication Date: 2011-05-04
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0007] The removal of nitrogen-containing organic compounds in diesel oil by extraction or adsorption is a common non-hydrogen denitrification method. Generally, appropriate extractants or adsorbents are used to remove nitrogen-containing compounds in diesel raw materials. The main disadvantage is that Diesel yields are slightly lower
This method does not take into account the influence of N compounds and hydrogen sulfide on deep hydrodesulfurization of diesel oil, and the space velocity is low

Method used

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  • Hydrotreating method for producing low-sulphur and ultra-low sulphur diesel oil
  • Hydrotreating method for producing low-sulphur and ultra-low sulphur diesel oil
  • Hydrotreating method for producing low-sulphur and ultra-low sulphur diesel oil

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Embodiment 1

[0031] The first reaction zone of this example adopts Mo-Co type hydrofinishing catalyst (FDS-4 hydrofinishing catalyst developed and produced by Fushun Petrochemical Research Institute), the direct hydrodesulfurization activity of this catalyst is relatively high, and the second reaction zone adopts W-Mo-Ni-Co hydrorefining catalyst (FH-UDS hydrorefining catalyst developed and produced by Fushun Petrochemical Research Institute), this catalyst has the characteristics of denitrogenation, aromatics saturation and deep hydrodesulfurization activity. The diesel oil after pre-hydrogenation in the first reaction zone is divided into 340°C heavy fraction, and the >340°C heavy fraction is sent to the second reaction zone after adsorption denitrogenation. Flow down mode of operation. The acidic cationic resin is used for adsorption and denitrification, the yield of diesel oil is 99.5%, and the removal rate of total nitrogen is 78%. See Table 3 for other process conditions and propert...

Embodiment 2

[0033] The first reaction zone of this example adopts Mo-Co type hydrofinishing catalyst (FDS-4 hydrofinishing catalyst developed and produced by Fushun Petrochemical Research Institute), the direct hydrodesulfurization activity of this catalyst is relatively high, and the second reaction zone adopts W-Mo-Ni type hydrorefining catalyst (FH-98 hydrorefining catalyst developed and produced by Fushun Petrochemical Research Institute), this catalyst has the characteristics of denitrogenation, aromatics saturation and deep hydrodesulfurization activity. The diesel oil after pre-hydrogenation in the first reaction zone is divided into light fraction 300°C, and the heavy fraction >300°C is sent to the second reaction zone after denitrification by adsorption, and the second reaction zone adopts gas-liquid countercurrent flow Operation method. Using dimethyl sulfoxide to extract and remove nitrogen, the yield of diesel oil is 98.7%, and the removal rate of total nitrogen is 67%. See T...

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Abstract

The invention provides a hydrotreating method for producing low-sulphur and ultra-low sulphur diesel oil, which comprises the following steps of: subjecting raw oil into pre-hydrogenation reaction in the first reaction region, then fractionating the diesel oil into a light fraction and a heavy fraction after implementing pre-hydrogenation, and then absorbing or extracting the heavy fraction to remove the organic nitrogen-containing compound which has an inhibition effect to deep desulfurization; infusing the heavy fraction into the second reaction region to implement deep hydrodesulfurization after removing the organic nitrogen-containing compound; and mixing the light fraction and the heavy fraction to obtain producing low-sulphur or ultra-low sulphur diesel oil. Compared with conventional refining process of diesel oil, the hydrotreating method for producing low-sulphur and ultra-low sulphur diesel oil provided by the invention has the advantages that the purpose for deep or ultra-deep hydrodesulfurization of diesel oil can be realized in the condition that the whole operation conditions are relatively mild due to the point that the negative factor which can influence the deep hydrodesulfurization of diesel oil is removed, and the hydrogen consumption of the method is relatively low.

Description

technical field [0001] The invention relates to a hydrogenation treatment method for producing low-sulfur and ultra-low-sulfur diesel oil, which belongs to the technical field of petrochemical industry. Background technique [0002] With the development of the world economy, the demand for energy in various countries is also increasing. In the current available energy structure, the development and utilization of petroleum-based energy is still in a dominant position. Since the 1980s, the demand for diesel in various countries in the world has shown a gradual upward trend. Experts predict that from 2005 to 2010, the average annual growth rate of China's diesel demand will be 6.6%. In 2010, my country's diesel demand is expected to reach 120 million tons. [0003] Due to the increasing scarcity of petroleum resources worldwide and the increasing demand for diesel, the share of diesel from heavy oil cracking is increasing, resulting in a large amount of sulfur, nitrogen and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02C10G67/04C10G67/06
Inventor 王喜彬曲涛刘雪玲曹春青李扬
Owner CHINA PETROLEUM & CHEM CORP
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