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A continuous liquid-phase diesel hydrotreating method

A liquid-phase hydrogenation and hydrogenation treatment technology, applied in refining to remove heteroatoms, etc., can solve problems such as poor catalyst stability, achieve good stability, high hydrogen utilization rate, good hydrogenation performance and stability

Active Publication Date: 2018-03-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a continuous phase diesel oil hydrotreating method to solve the problem of poor catalyst stability in the prior art

Method used

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  • A continuous liquid-phase diesel hydrotreating method
  • A continuous liquid-phase diesel hydrotreating method
  • A continuous liquid-phase diesel hydrotreating method

Examples

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Effect test

Embodiment 1

[0044] A Middle Eastern high-sulfur straight-run diesel fraction is used as feedstock 1, feedstock 1 is mixed with reactor effluent and hydrogen at a pressure of 8.2MPa, and the mixed material is introduced into the reactor equipped with hydrorefining catalyst D1, The deep hydrodesulfurization reaction is carried out here, and the reaction conditions are: reaction temperature 360°C, reactor pressure 8.0MPa, raw oil liquid hourly volume space velocity 1.5h -1 . The reactor is evenly divided into three beds, and at the outlet of the two beds, the hydrogen concentration in the flow in the reactor is measured to be 2×10 -4 g H 2 / g, the flow in the reactor and the hydrogen introduced from the outside enter the second mixer between the 2nd bed and the 3rd bed for mixing, and then enter the 3rd bed to continue the reaction, and the reaction is measured at the outlet of the 1st bed The concentration of hydrogen in the stream in the device is greater than 5×10 -4 g H 2 / g, so ther...

Embodiment 2

[0060] A secondary processing catalytic cracking diesel fraction is feed oil 2, feed oil 2 is mixed with reactor effluent and hydrogen at a pressure of 10.2MPa, and the mixed material is introduced into the reactor equipped with supported hydrofining catalyst D1 The deep hydrodesulfurization reaction is carried out in the middle, the reaction conditions are: reaction temperature 370 ℃, reactor pressure 10.0MPa, raw material oil liquid hourly volume space velocity 1.2h -1 . The reactor is evenly divided into five beds, and the hydrogen concentration in the stream in the reactor is measured at the outlet of the first bed to be 5×10 -4 g H 2 / g, the stream in the reactor and the hydrogen are mixed in the first mixer, and then enter the 2-bed layer for reaction; the hydrogen concentration in the stream in the reactor is measured at the outlet of the 2-bed layer as 8×10 -4 g H 2 / g, the concentration of hydrogen in the stream in the reactor was measured at the outlet of the 3-be...

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Abstract

A continuous liquid-phase diesel hydrotreating method comprises a plurality of catalyst beds in a reactor, and mixers are arranged between the beds. The multiple mixers of the reactor are not used at the same time, but according to the properties of the processed raw oil and the requirements of the product, choose to feed hydrogen into different mixers for mixing. The reactor is filled with a cobalt-molybdenum hydrogenation catalyst, which not only has good hydrogenation performance and stability, but also has a high hydrogen utilization rate for hydrodesulfurization. The method can handle straight-run diesel oil or low-quality secondary processed diesel oil, and the mixing times of diesel oil and hydrogen can be minimized under the condition of low reactor effluent circulation. In addition, the entire catalyst system has better stability, which significantly improves the operating cycle of the system.

Description

technical field [0001] The invention belongs to a diesel oil treatment method in the presence of hydrogen, more specifically, a diesel hydrogenation treatment method without hydrogen circulation. 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 and regions have generally supplied ultr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/08
Inventor 丁石高晓冬王哲张锐张乐
Owner CHINA PETROLEUM & CHEM CORP
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