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A method for producing clean diesel

A diesel and clean technology, which is applied in the treatment of hydrocarbon oil, petroleum industry, hydrocarbon oil treatment products, etc., can solve the problems of the difficulty of the ultra-deep hydrodesulfurization method of secondary processing diesel oil, and achieves the promotion of the hydrotreating of residual oil to remove impurities. The effect of reaction, reducing coking, and prolonging the operation period

Active Publication Date: 2019-03-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention proposes a method for producing clean diesel oil to solve the difficult problem of ultra-deep hydrodesulfurization method for secondary processing diesel oil in the prior art

Method used

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  • A method for producing clean diesel
  • A method for producing clean diesel
  • A method for producing clean diesel

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Effect test

Embodiment 1

[0036] Straight-run diesel oil A, light secondary processed diesel fraction B1, and diesel fraction I produced by the residual oil hydrogenation unit are mixed with hydrogen and enter the diesel hydrogenation unit together, and undergo deep hydrodesulfurization under the action of a hydrofining catalyst. The conditions are: the reaction temperature is 345°C, the volumetric space velocity of the raw material oil is 1.5h -1 , the hydrogen partial pressure is 6.4MPa, and the hydrogen-to-oil ratio is 500. The reactor effluent was separated to obtain diesel fraction II, and its product properties are shown in Table 2.

[0037] Residual oil raw material D, heavy secondary processed diesel fraction B2 are mixed with hydrogen and enter the residual oil hydrogenation reactor together, and react under the action of residual oil hydrogenation catalyst. The reaction conditions are reaction temperature 395°C, volume of raw oil Airspeed 0.237h -1 , the hydrogen partial pressure is 17.0MPa...

Embodiment 2

[0053] Straight-run diesel oil A, light secondary processed diesel fraction C1, and diesel fraction I produced by the residual oil hydrogenation unit are mixed with hydrogen and then enter the diesel hydrogenation unit together, and undergo deep hydrodesulfurization under the action of a hydrofining catalyst. The conditions are: the reaction temperature is 353°C, the volumetric space velocity of the raw material oil is 1.5h -1 , the hydrogen partial pressure is 6.4MPa, and the hydrogen-to-oil ratio is 500. The reactor effluent was separated to obtain diesel fraction II, and its product properties are shown in Table 2.

[0054] Residual oil D and heavy secondary processed diesel fraction C2 are mixed with hydrogen and enter the residual oil hydrogenation reactor together, and react under the action of residual oil hydrogenation catalyst. 0.23h -1 , the hydrogen partial pressure is 17.0MPa, and the hydrogen-to-oil ratio is 600. The reactor effluent was separated to obtain gas...

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Abstract

The invention discloses a method used for producing clean diesel oil. The method comprises following steps: secondary processing diesel oil is subjected to cutting so as to obtain a light secondary processing diesel oil cut fraction and a heavy secondary processing diesel oil cut fraction, wherein the content of 4,6-dimethyldibenzothiophene in the light secondary processing diesel oil cut fraction is controlled to be 0 to 300<mu>g / g; the heavy secondary processing diesel oil cut fraction is introduced into a residual oil hydrogenation reactor for reaction, the light secondary processing diesel oil cut fraction and straight-run diesel oil are introduced into a diesel oil hydrogenation reactor for reaction, an obtained diesel oil hydrogenation reaction effluent is subjected to separation and fractionation successively so as to obtain a gasoline cut fraction II and a diesel oil cut fraction II, wherein the sulphur content of the diesel oil cut fraction II is lower than 10<mu>g / g. According to the method, diesel oil hydrogenation and residual oil hydrogenation are combined, processing of a large amount of secondary processing diesel oil is realized, diesel oil products capable of satisfying Euro V emission standards are produced at relatively mild conditions, and catalyst operating period is prolonged.

Description

technical field [0001] The invention belongs to the method for obtaining clean diesel oil under the condition of hydrogen, more specifically, it is an ultra-deep hydrogenation desulfurization method for secondary processing diesel oil. Background technique [0002] The problem of environmental pollution caused by automobile exhaust has attracted widespread attention worldwide. Diesel, as an important vehicle fuel, emits sulfur oxides (SO X ), nitrogen oxides (NO X ) and particulate matter (PM) are important causes of air pollution. Diesel standards are becoming increasingly stringent worldwide, and the production of environmentally friendly low-sulfur or ultra-low-sulfur diesel has become a problem that governments and refineries around the world have generally paid attention to. EU countries have implemented the Euro V emission standard since 2009, which limits the sulfur content of diesel products below 10 μg / g. Refineries in Europe, America, Japan and other countries ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/00
CPCC10G65/00C10G2400/04
Inventor 丁石牛传峰张锐王哲鞠雪艳
Owner CHINA PETROLEUM & CHEM CORP