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Hydrogenation method for producing ultra-low sulfur clean diesel

An ultra-low-sulfur diesel technology, which is applied in the fields of hydrotreating process, chemical instruments and methods, and hydrocarbon oil treatment, can solve the problems of reducing diesel yield and increasing chemical hydrogen consumption, so as to improve economy, equipment investment and Low operating cost and reduced hydrogen consumption

Active Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, catalysts containing molecular sieves reduce diesel yield and increase chemical hydrogen consumption

Method used

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  • Hydrogenation method for producing ultra-low sulfur clean diesel
  • Hydrogenation method for producing ultra-low sulfur clean diesel
  • Hydrogenation method for producing ultra-low sulfur clean diesel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A high-sulfur straight-run diesel fraction from the Middle East is raw material A, and its properties are shown in Table 2. Raw material A is mixed with supplementary hydrogen and recycled hydrogen and then enters into the reactor equipped with two kinds of hydrofinishing catalysts. The reactor is divided into two catalyst beds, the upper part of the reactor is filled with hydrofinishing catalyst I, and the lower part of the reactor is filled with Hydrofinishing catalyst II, the loading ratio of the two hydrofinishing catalysts is 9:1 (volume ratio). Raw material A undergoes deep hydrodesulfurization reaction under the action of two hydrorefining catalysts. The reaction conditions are: reaction temperature 340°C, reaction hydrogen partial pressure 6.4MPa, liquid hourly volume space velocity 2.0h -1 , hydrogen oil volume ratio 300Nm 3 / m 3 . After the reaction product is cooled and separated, the obtained hydrogen-rich gas is recycled hydrogen. The obtained liquid pha...

Embodiment 2

[0042] A high-sulfur straight-run diesel fraction from the Middle East is mixed with a domestic catalytic cracking diesel fraction at a weight ratio of 1:1, and the obtained mixed diesel fraction is raw material B, and its properties are shown in Table 2. Raw material B is mixed with supplementary hydrogen and recycled hydrogen and then enters into the reactor equipped with two kinds of hydrofinishing catalysts. The reactor is divided into two catalyst beds, the upper part of the reactor is filled with hydrofinishing catalyst I, and the lower part of the reactor is filled with Hydrofinishing catalyst II, the loading ratio of the two hydrofinishing catalysts is 6:4 (volume ratio). Raw material B undergoes deep hydrodesulfurization reaction under the action of two hydrorefining catalysts. The reaction conditions are: reaction temperature 355°C, reaction hydrogen partial pressure 6.4MPa, liquid hourly volume space velocity 1.0h -1 , hydrogen oil volume ratio 300Nm 3 / m 3 . Aft...

Embodiment 3

[0049] A secondary processing catalytic cracking diesel fraction is raw material C, and its main properties are shown in Table 2. The raw material C is mixed with supplementary hydrogen and recycled hydrogen and then enters a reactor equipped with two hydrotreating catalysts. The reactor is divided into There are two catalyst beds, the upper part of the reactor is filled with hydrofinishing catalyst I, and the lower part of the reactor is filled with hydrofinishing catalyst II, and the filling ratio of the two hydrogenation catalysts is 3:7 (volume ratio). Raw material C undergoes deep hydrodesulfurization reaction under the action of two hydrorefining catalysts. The reaction conditions are: reaction temperature 340°C, reaction hydrogen partial pressure 6.4MPa, liquid hourly volume space velocity 2.0h -1 , hydrogen oil volume ratio 300Nm 3 / m 3 . After the reaction product is cooled and separated, the obtained hydrogen-rich gas is recycled hydrogen. The obtained liquid phase...

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Abstract

The invention relates to a hydrogenation method for producing ultra-low sulfur clean diesel. The method comprises the following steps: mixing diesel fraction feed oil and hydrogen gas, then transferring the mixture into a reactor to contact with a hydrofining catalyst I and a hydrofining catalyst II to react sequentially, and separating and distilling the reaction outflow to obtain the diesel product, wherein the hydrofining catalyst I is a supported hydrofining catalyst using Co-Mo as the active metal component, and the hydrofining catalyst II is a bulk hydrofining catalyst. By adopting the method provided by the invention to process inferior diesel fractions under mild conditions, the low sulfur or ultra-low sulfur clean diesel product can be obtained. Compared with the prior art, when the hydrodesulphurization depths are same, the chemical hydrogen consumption in the hydrogenation process of the invention is 5wt%-10wt% lower than that of the prior art.

Description

technical field [0001] The invention belongs to a method for refining hydrocarbon oil in the presence of hydrogen, more specifically, a hydrogenation method for producing ultra-low sulfur clean diesel oil. Background technique [0002] With the increasingly stringent environmental protection requirements worldwide, people have increasingly stringent requirements on the quality of petroleum products. The most important sulfur content index in diesel specifications has undergone three major changes in less than 10 years. Europe implemented S in 1996. The specification of <500μg / g (European II) was further reduced to S<350μg / g (European III) in 2000. In January 2005, the sulfur content of vehicle diesel had been reduced to less than 50μg / g (European IV). In 2005, European governments and representatives of the automotive industry published the "Strategic Research Plan" for the automotive industry in Brussels, proposing to make European road traffic "safer, less polluting ...

Claims

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Application Information

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IPC IPC(8): C10G65/08B01J27/19B01J23/888B01J27/132
Inventor 陈若雷王哲高晓冬张乐
Owner CHINA PETROLEUM & CHEM CORP
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