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Hydrogenation for producing high-bioctyl-value and low-freezing-point diesel oil

A technology for the production of high cetane and diesel oil, which is applied in the direction of refining to remove heteroatoms, etc., and can solve the problems of reducing the yield of diesel products

Active Publication Date: 2007-01-17
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both of these two methods can produce low-point diesel oil with high cetane number from diesel raw materials, but the point-point depressing mechanism of the two technologies is still based on the basis of hydrode-pointing, so it is inevitable to reduce the yield of diesel products. at the expense of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The raw material oil A and hydrogen are mixed at a hydrogen partial pressure of 6.4MPa, a reaction temperature of 360°C, and a liquid hourly space velocity of 1.0h -1 , volume hydrogen oil ratio 700Nm 3 / m 3 Under certain conditions, the first reaction zone is in contact with the hydrofining catalyst, and the reaction effluent does not separate hydrogen sulfide and ammonia into the second reaction zone. The hydrogen partial pressure is 6.4MPa, the reaction temperature is 360°C, and the liquid hourly space velocity is 1.5h. -1 , volume hydrogen oil ratio 700Nm 3 / m 3 The reaction effluent from the second reaction zone is cooled and separated, and the separated liquid product enters the fractionation system, and the hydrogen-rich hydrogen is recycled back to the reactor.

[0031] The reaction conditions and product properties are listed in Table 2. It can be seen from Table 2 that the cetane number of the diesel product is 38.8, which is 10.9 units higher than that of...

Embodiment 2

[0033] The raw material oil B and hydrogen are mixed at a hydrogen partial pressure of 6.4MPa, a reaction temperature of 365°C, and a liquid hourly space velocity of 1.34h -1 , volume hydrogen oil ratio 800Nm 3 / m 3 Under certain conditions, the first reaction zone is in contact with the hydrorefining catalyst, and the reaction effluent does not separate hydrogen sulfide and ammonia into the second reaction zone. At a hydrogen partial pressure of 6.4MPa, a reaction temperature of 370°C, and a liquid hourly space velocity of 2.0h -1 , volume hydrogen oil ratio 800Nm 3 / m 3 The reaction effluent from the second reaction zone is cooled and separated, and the separated liquid product enters the fractionation system, and the hydrogen-rich hydrogen is recycled back to the reactor.

[0034] The reaction conditions and product properties are listed in Table 2. It can be seen from Table 2 that the cetane number of the diesel product is 41.2, which is 13 units higher than that of th...

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Abstract

Hydrogenation of low-set point and high-cetyl value diesel oil is carried out by contacting raw material oil with hydrogen and hydrogenation refined catalyst in the first reactive area, entering reactant into the second reactive area to contact with hydrogenation modified catalyst, cooling, separating, returning the hydrogen-enriched gas separated into reactor to reuse, and entering the liquid product into fractional system. It has higher recovery rate, more cetyl of diesel oil and lower set point.

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 increasing the cetane number of diesel oil and lowering the freezing point of diesel oil. Background technique [0002] With the continuous development of my country's national economy and the improvement of people's living standards, on the one hand, the demand for various petroleum products is growing rapidly, and on the other hand, the environmental pollution caused by petroleum products in the process of use, especially the pollution of motor vehicle exhaust, has been increasingly affected. more and more attention. In order to protect the environment and reduce the exhaust pollution of motor vehicles, countries all over the world (including China) have upgraded the specifications of vehicle fuel. For diesel fuel, the changes in the new specifications focus on reducing sulfur content, arom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/02
Inventor 胡志海蒋东红熊震霖李毅毛以朝龙湘云
Owner CHINA PETROLEUM & CHEM CORP
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