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

A gasoline and diesel oil, high-quality technology, applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of small freezing point depression, low cetane number of diesel oil, etc. point, the effect of promoting isomerism cracking

Active Publication Date: 2015-07-01
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 with excellent quality by coked gasoline and diesel oil
  • Method for producing low freezing point diesel oil with excellent quality by coked gasoline and diesel oil
  • Method for producing low freezing point diesel oil with excellent quality by coked gasoline and diesel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A coked gasoline A1 and a coked diesel A2 are used as raw materials. The first reaction zone is filled with hydrofinishing catalyst RS-1000; the second reaction zone is filled with hydrofinishing catalyst RS-1000, hydromodified decondensation catalyst D and hydrofinishing catalyst RS-1000 in sequence, and the catalyst in the second reaction zone The filling volume ratio is 60:40:5. In order to avoid coking, a small amount of protective agents RG-10A and RG-10B can be loaded on the upper part of the first and second reaction zones.

[0056] First, the raw material A1 is contacted with the RS-1000 catalyst in the first reaction zone to carry out hydrodesulfurization, hydrodenitrogenation, saturation reaction of olefins and aromatics. Raw material A2 first contacts with RS-1000 catalyst in the second reaction zone to carry out hydrodesulfurization, hydrodenitrogenation, hydrogenation and saturation reaction of olefins and aromatics; then it contacts with hydrogenation modif...

Embodiment 2

[0059] Using a kind of coked gasoline A1 and coked diesel oil A2 as raw materials, adopt the method of the present invention to depress the point, the first reaction zone is filled with hydrofinishing catalyst RS-1000; the second reaction zone is filled with hydrofinishing catalyst RS-1000, plus The filling volume ratio of the hydrogen-modified decondensation catalyst D and the hydrofinishing catalyst RS-1000 in the second reaction zone is 40:60:10. The properties of raw oil are listed in Table 1, and the reaction conditions and product properties are listed in Table 3.

[0060] It can be seen from the data in Table 3 that the freezing point of the diesel product was reduced to -44°C, the cold filter point was reduced to -30°C, the yield reached 87.5%, the cetane number increased to 50.6, and the sulfur content was greatly reduced.

Embodiment 3

[0062] A kind of coked gasoline B1 and coked diesel oil B2 are used as raw materials, and the method of the present invention is used for depressing. The first reaction zone is filled with a hydrofinishing catalyst RS-1000; the second reaction zone is filled with a hydrofinishing catalyst RS-1000, plus The loading volume ratio of the hydrogen-modified decondensation catalyst D and the hydrofinishing catalyst RS-1000 in the second reaction zone is 50:50:30. The properties of raw oil are listed in Table 2, and the reaction conditions and product properties are listed in Table 4.

[0063] It can be seen from the data in Table 4 that the freezing point of the diesel product is reduced to -43°C, the cold filter point is reduced to -31°C, the yield reaches 87.36%, the cetane number increases to 47.4, and the sulfur content is greatly reduced.

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Abstract

The invention relates to a method for producing a low freezing point diesel oil with excellent quality by coked gasoline and diesel oil, which is characterized in that the coked gasoline and diesel oil is contacted in a first reaction zone with a Hydrobon catalyst I for reaction, the coked diesel oil is contacted with a Hydrobon catalyst II in a second reaction zone and is contacted with a hydrogenation modified pour point depression catalyst for hydrodesulfurization, hydrodenitrogenation, aromatics saturation and modified pour point depression reaction, effluents in the first reaction zone and the second reaction zone are mixed and introduced in a separating system and a fractionation system, and gas, a naphtha fraction and a low freezing point diesel oil fraction can be separated. According to the invention, the freezing point of the diesel oil fraction can be obviously reduced, the method can produce the number -10--35 low freezing point diesel oil in a flexible mode, and the sulfur content and nitrogen content of the product can be greatly reduced.

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] In recent years, the heaviness and inferiority of crude oil have been increasing, and secondary processing methods such as delayed coking and catalytic cracking of heavy oil have been more and more widely used. Secondary processed gasoline and diesel have high content of impurities such as sulfur and nitrogen, high content of olefins, poor stability, dark color, and need to be used as a blending component after hydrotreating. [0003] 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...

Claims

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Application Information

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Patent Type & Authority Patents(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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