Hydrogenation method for increasing cetane number of diesel oil

A technology for cetane number and diesel oil, which is applied in the field of hydrogenation and upgrading to improve the cetane number of diesel oil, can solve the problems of not mentioning the properties of the product diesel, achieve high product yield, high volume space velocity, and reduce aromatic hydrocarbons. The effect of content

Active Publication Date: 2011-10-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the patent application did not mention the nature of the product diesel

Method used

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  • Hydrogenation method for increasing cetane number of diesel oil
  • Hydrogenation method for increasing cetane number of diesel oil
  • Hydrogenation method for increasing cetane number of diesel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Mixed raw material oil H is a mixture of low-quality catalytic cracking diesel oil with high sulfur, nitrogen content and aromatics content and a straight-run diesel oil with low sulfur and nitrogen content and good properties at a mass ratio of 7:3. The properties of the oil are shown in Table 1. It was carried out on a 3L fixed-bed medium-scale experimental device.

[0042] The mixed raw material oil H is mixed with hydrogen, and enters the first reaction zone after being preheated by the heating furnace, and successively contacts and reacts with the hydrogenation protection agent and the hydrofinishing catalyst I. The loading volume ratio of the hydrogenation protection agent and the hydrofinishing catalyst I is 1:10. The liquid effluent from the first reaction zone enters the second reaction zone without intermediate separation, and quickly contacts and reacts with the hydrogenation upgrading catalyst, and the reaction product in the second reaction zone enters the...

Embodiment 2

[0049] The mixed raw material oil F is a mixture of a low-quality catalytic cracking diesel oil with high sulfur, nitrogen content and aromatics content and a straight-run diesel oil with low sulfur and nitrogen content and good properties according to the mass ratio of 1:1. The properties of the oil are shown in Table 1. It was carried out on a 3L fixed-bed medium-scale experimental device.

[0050] The mixed raw material oil F is mixed with hydrogen, and enters the first reaction zone after being preheated by the heating furnace, and successively contacts and reacts with the hydrogenation protection agent and the hydrofinishing catalyst I. The loading volume ratio of the hydrogenation protection agent and the hydrofinishing catalyst I is 1:10. The liquid effluent from the first reaction zone enters the second reaction zone without intermediate separation, and quickly contacts and reacts with the hydrogenation upgrading catalyst, and the reaction product in the second reacti...

Embodiment 3

[0053] The raw material oil J is a kind of low-quality catalytic cracking diesel oil, and the properties of the raw material oil are shown in Table 1. It was carried out on a 3L fixed-bed medium-scale experimental device.

[0054] The raw material oil J enters the first reaction zone after being preheated by the heating furnace, and successively contacts and reacts with the hydrogenation protection agent and the hydrofinishing catalyst I. The loading volume ratio of the hydrogenation protection agent and the hydrofinishing catalyst I is: 1:10. The liquid effluent from the first reaction zone enters the second reaction zone without intermediate separation, and quickly contacts and reacts with the hydrogenation upgrading catalyst, and the reaction product in the second reaction zone enters the third reaction zone to contact and react with the hydrogenation refining catalyst II, After cooling, the final liquid effluent enters the cold high fraction for oil and gas separation, and...

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Abstract

Disclosed is a hydrogenation method for increasing cetane number of diesel oil. According to the invention, a reaction unit is provided with three sequentially arranged reaction zones; in a first reaction zone, a hydrobon catalyst I is filled and a hourly space velocity is 0.5 to 5.0 h <-1>; in a second reaction zone, a hydroupgrading catalyst is filled and a hourly space velocity is 1.0 to 8.0 h <-1>; in a third reaction zone, a hydrobon catalyst II is filled and a hourly space velocity is 1.5 to 12.0 h <-1>; the acidity of the hydrobon catalyst I is less than that of the hydrobon catalyst II. With the utilization of the method provided in the invention, cracking of open loops of annular aromatic hydrocarbons with more than two rings in the raw materials can be realized and the reaction of long-chain alkane cracking into short-chain alkane and the scission reaction of annular hydrocarbon with long side chains can be reduced; therefore, cetane number of diesel oil can be greatly increased under the condition that high yield of diesel oil is maintained.

Description

technical field [0001] The invention belongs to a method for refining hydrocarbon oil in the presence of hydrogen, more specifically, it belongs to a hydrogenation upgrading method for increasing the cetane number of diesel oil. Background technique [0002] As the requirements for environmental protection are getting higher and higher, the requirements for the quality of diesel products in various countries are becoming more and more stringent. For automotive diesel, the indicators that have changed a lot in the new specifications are sulfur content and cetane number. In the emission standard equivalent to Euro IV to be implemented in China, the cetane number of diesel oil is required to be not less than 51, and the sulfur content is not greater than 50 μg / g, while the Euro V emission standard implemented in Europe in 2009 requires diesel oil to be The alkane number is not less than 51, and the sulfur content is not more than 10μg / g. [0003] On the other hand, as the pri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/04
Inventor 张永奎聂红胡志海李明丰蒋东红张毓莹任亮
Owner CHINA PETROLEUM & CHEM CORP
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