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Method for producing low freezing point diesel oil by coked gasoline and diesel oil

A gasoline, diesel and diesel technology, which is applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of small freezing point depression and low cetane number of diesel oil, etc.

Active Publication Date: 2013-04-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process belongs to the hydrogen decondensation process, the freezing point depression is small, and the cetane number of the product diesel is low

Method used

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  • Method for producing low freezing point diesel oil by coked gasoline and diesel oil

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Using a kind of coking gasoline and diesel mixed oil A as raw material, the raw material A is firstly subjected to whole-distillate hydrotreating in the first reaction zone, and the reaction effluent passes through a hot high-pressure separator and is flashed into two parts: a gas phase stream and a liquid phase stream , the liquid phase stream is mixed with hydrogen and then enters the second reaction zone for decondensation and post-refining reactions. The hydrofinishing catalyst I loaded in the first reaction zone is RS-1000, the hydrotreating catalyst D loaded in the second reaction zone is RS-1000, and the hydrofining catalyst II loaded in the second reaction zone is RS-1000. The filling volume ratio is: 50:40:10. The properties of raw oil are listed in Table 1, and the reaction conditions and product properties are listed in Table 2. The thermal high-resolution operating conditions are: 4.0MPa, 355°C.

[0060] It can be seen from the data in Table 2 that under m...

Embodiment 2

[0065] Coking gasoline and diesel mixed oil A is used as raw material, treated by the method provided by the present invention, using hydrofinishing catalyst I (RS-1000), hydromodified decondensation catalyst D and hydrofinishing catalyst II (RS-1000) , the three-part catalyst loading ratio is 45:45:10, the operating pressure of the hot high-pressure separator is 8.0MPa, and 350°C. The properties of raw oil are listed in Table 1, and the reaction conditions and product properties are listed in Table 2.

[0066] It can be seen from the data in Table 2 that the freezing point of the diesel product was reduced to -27°C, the cold filter point was reduced to -16°C, the yield reached 93.5%, the cetane number increased to 51.8, and the sulfur content was greatly reduced.

Embodiment 3

[0068] Coking gasoline and diesel mixed oil B is used as raw material, processed by the method provided by the present invention, using hydrofinishing catalyst I (RS-1000), hydromodified decondensation catalyst D and hydrofinishing catalyst II (RS-1000) , the three-part catalyst loading ratio is 40:50:10, the operating pressure of the hot high-pressure separator is 6.4MPa, and 355°C. The properties of raw oil are listed in Table 1, and the reaction conditions and product properties are listed in Table 3.

[0069] It can be seen from the data in Table 3 that the freezing point of the diesel product was reduced to -45°C, the cold filter point was reduced to -33°C, the yield reached 85.4%, the cetane number increased to 48.1, and the sulfur content was greatly reduced.

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Abstract

The invention relates to a method for producing a low freezing point diesel oil by coked gasoline and diesel oil, which is characterized in that coked gasoline and diesel oil is contacted in a first reaction zone with a Hydrobon catalyst I for reaction, an effluent is performed with flash evaporation in a hot high-pressure separator, the obtained liquid phase material flow is introduced in a second reaction zone and is contacted with a hydrogenation modified pour point depression catalyst for a hydrogenation modified pour point depression reaction, a reaction effluent is mixed with the gas phase material flow obtained in the hot high-pressure separator and is introduced in a separating system and a fractionation system, and the gas, a naphtha fraction and a low freezing point diesel oil fraction can be separated. According to the invention, the optimal hydrogenation modified heterogeneous pour point depression reaction is employed, the freezing point of the diesel oil fraction can be obviously reduced, and the high product diesel oil fraction yield can be simultaneously kept. The method can directly produce the number -10--35 low freezing point diesel oil, the sulfur content, nitrogen content and aromatic hydrocarbons content of the product can be reduced, and the cetane number is increased.

Description

technical field [0001] The invention relates to a process for refining and upgrading hydrocarbons in the presence of hydrogen. More specifically, it is a method for producing low-condensation diesel after hydrogenation of coked gasoline and diesel. Background technique [0002] With the continuous and rapid development of my country's national economy and the improvement of people's living standards, the demand for vehicle fuel continues to increase, especially in the northern market in winter, the demand for low-condensation diesel is growing rapidly. On the other hand, with the continuous acceleration of diesel quality upgrades, the quality requirements of diesel products are becoming more and more stringent. In addition to special requirements on freezing point and cold filter point, low-condensation diesel has strict requirements on sulfur content, polycyclic aromatic hydrocarbon content, sixteen There are also strict requirements for alkane number, etc. [0003] Most ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
Inventor 任亮蒋东红张毓莹胡志海聂红王子文董松涛
Owner CHINA PETROLEUM & CHEM CORP
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