A combined method for diesel hydrotreating and upgrading

A technology of hydrogenation upgrading and diesel oil, which is applied in the fields of hydrogenation treatment process, petroleum industry, and hydrocarbon oil treatment, etc. It can solve the problems of excessive hydrogenation, large hydrogen consumption, unreasonable economy, etc., and reduce investment and hydrogen consumption Effect

Active Publication Date: 2015-09-23
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

For small-scale refineries, building two sets of small-scale hydrogenation units requires a large investment; building a set of hydrogenation units needs to be designed according to poor-quality conditions. Good-quality diesel has the problem of excessive hydrogenation, and hydrogen consumption Large volume, economically unreasonable

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  • A combined method for diesel hydrotreating and upgrading
  • A combined method for diesel hydrotreating and upgrading

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Embodiment

[0020] Table 1 Main Properties of Raw Oil

[0021] project straight run diesel catalytic diesel Flow, 10,000 tons / year 120 80 Density (20℃) / g / ml 0.8556 0.9225 Distillation range, ℃ 180~340 180~350 Sulfur content, wt% 1.55 1.81 Aromatic content, wt% 22.1 58.6 cetane number 46 23

[0022] Table 2 Main Properties of Hydrofining Catalysts

[0023]

[0024] Table 3 embodiment process condition and reaction result

[0025] Process plan Reference scheme Example-1 Example-2 first reactor Raw oil Hybrid Diesel straight run diesel straight run diesel Hydrogen partial pressure, MPa 10.0 6.5 6.5 Hydrogen oil volume ratio 500:1 300:1 300:1 Airspeed, h -1 1.0 2.0 2.0 Reaction temperature, °C 360 340 350 second reactor Raw oil - catalytic diesel catalytic diesel Hydrogen parti...

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Abstract

The invention relates to a diesel oil hydroupgrading combination method, which includes: firstly subjecting high quality diesel oil and recycle hydrogen from a cold high pressure separator to mixing heating and then making them react in a first hydrofining reactor, subjecting the obtained hydrofining material flow to heat transfer cooling, then bringing the material flow into the cold high pressure separator to undergo gas-liquid separation so as to obtain a gas phase material and a liquid material; subjecting the gas phase material to desulfurization in a desulfurization system, raising the pressure of the desulfurized hydrogen by a compressor, then subjecting the hydrogen and lower quality diesel oil to mixing heating and making them react in a second hydroupgrading reactor, conducting heat transfer cooling on a reaction product, then letting the product enter a cold high pressure separator, taking the separated gas phase material as recycle hydrogen and bringing it into the first hydrofining reactor, letting the liquid material mix with a liquid material from the high pressure separator and enter a low pressure separator, subjecting the obtained liquid product to fractionation in a fractionating tower so as to obtain gas, naphtha and diesel oil. The method only requires the first hydrofining reactor has a desulphurization rate meeting the requirement, thus reducing the investment and hydrogen consumption; and the second hydroupgrading reactor can ensure an enough high cetane number.

Description

technical field [0001] The invention relates to a combined method for hydrogenation and upgrading of diesel oil. Background technique [0002] Catalytic cracking has the characteristics of wide range of raw material adaptability and good economy, and has been widely used in China, but its diesel oil quality is poor (high content of sulfur, nitrogen and aromatics, low cetane number), and storage stability is poor. On the other hand, in order to protect the environment, increasingly stringent environmental protection regulations put forward higher requirements on the quality of diesel products, limiting the sulfur content, aromatics content and cetane number. In addition to catalytic diesel, general refineries also have a large number of diesel components of different qualities such as straight-run diesel and coker diesel. In order to meet the new quality standards, oil refineries must build new diesel hydrogenation units to economically Reasonable hydrofining or upgrading. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/02
Inventor 李胜山尹恩杰刘小波辛若凯王禹周浩谢崇亮
Owner BC P INC CHINA NAT PETROLEUM CORP
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