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Method for production of ultralow-sulfur diesel oil

A technology for ultra-low-sulfur diesel and diesel oil, which is applied in the field of hydrogenation for the production of ultra-low-sulfur clean diesel, and can solve the problems of increasing equipment investment and operating costs, high reaction pressure, and low space velocity

Active Publication Date: 2013-01-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, when the purpose of deep desulfurization and dearomatization is achieved, the space velocity is low and the reaction pressure is high, which increases the investment and operating costs of the device.

Method used

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  • Method for production of ultralow-sulfur diesel oil
  • Method for production of ultralow-sulfur diesel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] A high-sulfur straight-run diesel fraction from the Middle East is raw material A, and its properties are shown in Table 3. Raw material A enters the reactor equipped with two hydrorefining catalysts from the top, and the supplementary hydrogen and recycled hydrogen are mixed and then enter the reactor from the bottom. The reactor is divided into two catalyst beds. The upper part of the reactor is filled with hydrofinishing catalyst I-catalyst C1, and the lower part of the reactor is filled with hydrofinishing catalyst II. The filling ratio of the two hydrofinishing catalysts is 6:4 (volume ratio) . Raw material A and mixed hydrogen are subjected to deep hydrodesulfurization reaction under the action of two hydrorefining catalysts in the countercurrent contact mode. The reaction conditions are: reaction temperature 355 ° C, reaction hydrogen partial pressure 6.4 MPa, liquid hourly volume space velocity 2.4 h -1 , hydrogen oil volume ratio 300Nm 3 / m 3 . After the r...

Embodiment 2

[0090] A middle-east high-sulfur straight-run diesel fraction was mixed with a domestic catalytic cracking diesel fraction at a weight ratio of 5:3, and the obtained mixed diesel fraction was raw material B, and its properties are shown in Table 3. Raw material B enters the reactor equipped with two hydrorefining catalysts from the top, and the supplementary hydrogen and recycled hydrogen are mixed and then enter the reactor from the bottom. The reactor is divided into two catalyst beds. The upper part of the reactor is filled with hydrofinishing catalyst I—catalyst C1, and the lower part of the reactor is filled with hydrofinishing catalyst II. The filling ratio of the two hydrofinishing catalysts is 1:1 (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 7.0MPa, liquid hourly volume space velocity 1.5h -1 , hyd...

Embodiment 3

[0097] A secondary processing catalytic cracking diesel oil fraction is raw material C, its main properties are shown in Table 3, raw material C enters the reactor equipped with two kinds of hydrofining catalysts from the top, supplements hydrogen and circulates hydrogen and mixes it from the bottom into the above reactor. The reactor is divided into two catalyst beds. The upper part of the reactor is filled with hydrofinishing catalyst I-catalyst C2, and the lower part of the reactor is filled with hydrofinishing catalyst II. 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 360°C, reaction hydrogen partial pressure 7.0MPa, liquid hourly volume space velocity 2.0h -1 , hydrogen oil volume ratio 350Nm 3 / m 3 . After the reaction product is cooled and separated, the obtained hydrogen-rich ga...

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Abstract

Disclosed is a method for production of ultralow-sulfur diesel oil. Raw oil of diesel oil fraction enters a reactor from the top, make-up hydrogen and circulating hydrogen are mixed and then enter the reactor from the bottom, the raw oil of diesel oil fraction sequentially contacts a hydrofining catalyst I and a hydrofining catalyst II for reaction under the hydrofining reaction conditions, and the reaction products are separated and fractionated to obtain diesel oil product. The hydrofining catalyst I is a loaded hydrofining catalyst using nickel-molybdenum or nickel-molybdenum-tungsten as active metal component, and the hydrofining catalyst II is a bulk hydrofining catalyst. The invention can solve the problems of harsh operating conditions and low space velocity in 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): C10G67/02
Inventor 陈若雷高晓冬王哲王锦业张乐
Owner CHINA PETROLEUM & CHEM CORP
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