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Diesel oil hydrodesulfurization and decolouring method

A technology for hydrodesulfurization and diesel oil, which can be used in hydrotreating process, petroleum industry, treatment of hydrocarbon oil, etc. It can solve the problems of poor color stability and high product chromaticity.

Active Publication Date: 2016-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is that when producing diesel products with a sulfur content less than 10 μg / g in the prior art, the chroma of the product is high and the color stability is poor

Method used

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  • Diesel oil hydrodesulfurization and decolouring method

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Effect test

Embodiment 1

[0058] Raw material oil A and hydrogen enter the reactor equipped with hydrogenation catalyst C together, and the volume ratio of hydrogen to oil is 300Nm 3 / m 3 , under the action of hydrogenation catalyst C, the deep hydrodesulfurization reaction is carried out, the reaction conditions are: reaction temperature 380 ℃, raw material oil liquid hourly volume space velocity 4.0h -1 , the pressure of the reaction system is 6.0 MPa, and the sulfur content of the liquid phase stream in the obtained reactor effluent is less than 50 μg / g.

[0059] The middle part of the hot high-pressure separator is filled with hydrogenation catalyst D1, and the reactor effluent enters the hot high-pressure separator from the middle and upper part of the hot high-pressure separator through heat exchange, and passes through the catalyst bed filled in the hot high-pressure separator from top to bottom. The temperature of the separator is 320°C, the pressure is 6.0MPa, and the liquid hourly volume spa...

Embodiment 2

[0062] Raw material oil B and hydrogen enter the reactor equipped with hydrogenation catalyst C together, and the volume ratio of hydrogen to oil is 500Nm 3 / m 3 , under the action of hydrogenation catalyst C, the deep hydrodesulfurization reaction is carried out, the reaction conditions are: reaction temperature 390 ℃, raw material oil liquid hourly volume space velocity 2.8h -1 , the pressure of the reaction system is 8.0 MPa, and the sulfur content of the liquid phase stream in the obtained reactor effluent is less than 50 μg / g.

[0063] The middle part of the hot high-pressure separator is filled with hydrogenation catalyst D1, and the reactor effluent enters the hot high-pressure separator from the middle and upper part of the hot high-pressure separator through heat exchange, and passes through the catalyst bed filled in the hot high-pressure separator from top to bottom. The temperature of the separator is 330°C, the pressure is 8.0MPa, and the liquid hourly volume spa...

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Abstract

The invention relates to a diesel oil hydrodesulfurization and decolouring method. According to the invention, diesel oil raw oil and hydrogen are introduced into a reactor, are subjected to a hydrogenation reaction under a hydrogenation catalyst I, a reactor effluent is subjected to heat exchange and is introduced into a high-pressure hot separator, the active metal filling at the bottom of the high-pressure hot separator is a cobalt-molybdenum hydrogenation catalyst II, a liquid phase material flow obtained by the high-pressure hot separator is extracted from the bottom of the high-pressure hot separator, and the material flow is cooled and fractioned to obtain the hydrogenation gasoline and hydrogenation diesel oil. The active metal employed in the high-pressure hot separator is the cobalt-molybdenum hydrogenation catalyst II, hydrogen utilization rate of the hydrodesulfurization reaction is higher, the inhibition effect on hydrogen by H2S is less during ultra-deep hydrodesulfurization, straight-run diesel oil or inferior secondary processing diesel oil can be processed, ultra low sulfur diesel oil with sulfur content of less than 10 ppm is produced, an independent hydrogenation decolouring reactor is not required, the hydrogenation decolouring reaction can be completed, and the ASTM D1500 chroma of the product is less than 1.0.

Description

technical field [0001] The invention belongs to a method for refining hydrocarbon oil under the condition of hydrogen, more specifically, a method for hydrodesulfurization and decolorization of diesel oil. Background technique [0002] With the acceleration of dieselization of vehicles worldwide, the demand for diesel will further increase in the future. However, the exhaust gas emitted after diesel combustion contains sulfur oxides (SO X ), nitrogen oxides (NO X ) and particulate matter (PM) and other harmful substances. These substances not only form acid rain in cities and surrounding areas, destroy the earth's ozone layer, but may also cause human cancer. To reduce SO in automobile exhaust X , NO X To reduce the emission of pollutants such as PM and PM, it is necessary not only to reduce the sulfur content in diesel, but also to reduce the aromatics content in diesel. [0003] For this reason, diesel oil standards are becoming increasingly stringent around the worl...

Claims

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Application Information

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IPC IPC(8): C10G67/02
Inventor 丁石牛传峰高晓冬王哲张锐
Owner CHINA PETROLEUM & CHEM CORP
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