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Production method for ultralow-sulfur diesel oil

A technology of ultra-low sulfur diesel oil and production method, which can be used in hydrocarbon oil treatment products, petroleum industry, treatment of hydrocarbon oil, etc., and can solve the problems of harsh reaction conditions and poor catalyst stability.

Active Publication Date: 2020-04-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for producing ultra-low sulfur diesel oil to solve the problems of harsh reaction conditions and poor catalyst stability in the prior art

Method used

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  • Production method for ultralow-sulfur diesel oil

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] A high-sulfur straight-run diesel fraction in the Middle East is used as diesel feedstock 1. Diesel feedstock 1 is pressurized and mixed with a hydrogen-containing stream before entering the hydrogenation reactor and passing through the first hydrogenation reaction zone and the second hydrogenation reaction zone in turn. , contact with hydrogenation catalyst I and hydrogenation catalyst S1 respectively to carry out deep hydrodesulfurization reaction, the hydrogen partial pressure at the reactor inlet is 4.8MPa, the reaction temperature in the first hydrogenation reaction zone is 310°C, and the reaction temperature in the second hydrogenation reaction zone is The reaction temperature is 345°C, and the liquid hourly volume space velocity in the first hydrogenation reaction zone is 20.0h -1 , the liquid hourly volume space velocity of the second hydrogenation reaction zone is 2.5h -1 , the volume ratio of hydrogen to oil in the first hydrogenation reaction zone and the sec...

Embodiment 2

[0090] A mixed diesel fraction is used as diesel feed oil 2. After the diesel feed oil 2 is pressurized and mixed with a hydrogen-containing stream, it enters the hydrogenation reactor, and passes through the first hydrogenation reaction zone and the second hydrogenation reaction zone in turn, respectively and the hydrogenation reaction zone. The hydrogenation catalyst I contacts with the hydrogenation catalyst S2 to carry out deep hydrodesulfurization reaction, the hydrogen partial pressure at the reactor inlet is 6.4MPa, the reaction temperature in the first hydrogenation reaction zone is 320°C, and the reaction temperature in the second hydrogenation reaction zone is 355°C , the liquid hourly volume space velocity of the first hydrogenation reaction zone is 18.0h -1 , the liquid hourly volume space velocity of the second hydrogenation reaction zone is 1.5h -1 , the volume ratio of hydrogen to oil in the first hydrogenation reaction zone and the second hydrogenation reaction...

Embodiment 3

[0101] A mixed diesel fraction is used as diesel feedstock oil 3. After the diesel feedstock oil 3 is pressurized and mixed with a hydrogen-containing stream, it enters the hydrogenation reactor, and passes through the first hydrogenation reaction zone and the second hydrogenation reaction zone in turn, respectively and the hydrogenation reaction zone. The hydrogenation catalyst I contacts with the hydrogenation catalyst S3 to carry out deep hydrodesulfurization reaction, the hydrogen partial pressure at the reactor inlet is 7.2MPa, the reaction temperature in the first hydrogenation reaction zone is 320°C, and the reaction temperature in the second hydrogenation reaction zone is 360°C , the liquid hourly volume space velocity of the first hydrogenation reaction zone is 15.0h -1 , the liquid hourly volume space velocity of the second hydrogenation reaction zone is 1.0h -1 , the volume ratio of hydrogen to oil in the first hydrogenation reaction zone and the second hydrogenatio...

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Abstract

The invention relates to a production method for ultralow-sulfur diesel oil, which comprises the following steps of: mixing diesel raw oil and a hydrogen-containing material flow, sequentially passingthrough a first hydrogenation reaction zone and a second hydrogenation reaction zone for reaction, and carrying out gas-liquid separation and liquid-phase material fractionation on the material subjected to hydrogenation reaction to obtain the ultralow-sulfur diesel oil product. By adopting the method provided by the invention, high-sulfur straight-run diesel oil or inferior secondary processingdiesel oil can be treated, an ultralow-sulfur diesel oil product with the sulfur content of less than 10 mug / g can be produced under a relatively mild condition, the whole catalyst system has better stability, and the operation period of the device is remarkably prolonged.

Description

technical field [0001] The invention relates to the field of oil refining and chemical industry, in particular to a method for producing ultra-low sulfur diesel oil from inferior raw material oil. Background technique [0002] The problem of environmental pollution caused by automobile exhaust has attracted widespread attention worldwide. Diesel is an important vehicle fuel, and the sulfur oxides (SOX), nitrogen oxides (NOX) and particulate matter (PM) contained in the exhaust gas after combustion 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 4 emission standard with a sulfur content of less than 50 μg / g in light diesel oil for vehicles in 2005, and implemented the Euro 5 emission standard with...

Claims

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Application Information

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IPC IPC(8): C10G67/14
CPCC10G67/14C10G2300/70C10G2300/202C10G2300/1048C10G2300/1059C10G2300/1055C10G2400/04
Inventor 丁石习远兵张锐葛泮珠陈文斌
Owner CHINA PETROLEUM & CHEM CORP