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Method for processing heavy oil by combined process

A combined process and heavy oil technology, which is applied in the direction of only multi-stage series refining and cracking process, can solve the problems of increased gas yield, decreased light oil yield, and low specific gravity of hydrogenated heavy oil, so as to improve the utilization rate , Eliminate mutual influence and save oil resources

Active Publication Date: 2017-03-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods directly mix poor-quality catalytically cracked heavy oil and catalytically cracked diesel oil with waxy oil raw materials containing a large amount of saturated hydrocarbons. The saturated hydrocarbons in waxy oils are easy to crack due to the action of acid centers on the catalyst during hydrotreating. light hydrocarbons, resulting in an increase in gas yield, and at the same time, the hydrogenated heavy oil produced has a lower specific gravity, and the yield of light oil decreases when it is used as the feed of the catalytic cracking unit

Method used

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  • Method for processing heavy oil by combined process
  • Method for processing heavy oil by combined process
  • Method for processing heavy oil by combined process

Examples

Experimental program
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Embodiment approach

[0061] The second specific embodiment of the present invention is as figure 2 Shown:

[0062] After the heavy oil is separated and treated, the SA1 component and the A2A3 component are obtained, and the obtained SA1 component is subjected to the first catalytic cracking reaction to obtain dry gas, liquefied gas, gasoline, diesel oil, coke and cracked heavy oil; the obtained A2A3 component The hydroprocessing reaction is carried out, and the obtained hydrogenated oil is subjected to the third catalytic cracking reaction to obtain dry gas, liquefied gas, gasoline, diesel oil, coke and cracked heavy oil; the obtained diesel oil and cracked heavy oil are subjected to hydroprocessing reaction to obtain hydrogenated Hydrogen produces oil. At the same time, the hydrocracking tail oil and the SA1 component can be mixed together to perform the first catalytic cracking reaction.

[0063] The third specific embodiment of the present invention is as image 3 Shown: SA1 component and A...

Embodiment 1

[0071] This example is used to illustrate the implementation method of the heavy oil separation unit in the method for processing heavy oil with the combined process provided by the present invention. Fill the bottom of the separation column with 30g of neutral alumina (the specific surface area is 152m 2 / gram, pore volume is 0.213 milliliters / gram), the aluminum oxide (massfraction of silver is 7.05 mass %, adopts silver nitrate impregnation method to prepare) of 110g load silver ions in the middle of filling, upper layer fills 30g silica gel (specific surface area is 479 meters 2 / gram, the pore volume is 0.349 milliliters / gram); The lower end of the separation column is connected with the vacuum system. The total volume of the stationary phase was 150 mL. Take vacuum gas oil (VGO, Tahe crude oil is taken from the Tahe Oilfield of Sinopec Northwest Branch Company, and obtain Tahe vacuum gas oil through true boiling point distillation at the Research Institute of Petrochemi...

Embodiment 2

[0073] Such as figure 1 As shown, the SA1 component and the A2A3 component obtained in Example 1 are respectively used as catalytic cracking raw materials, and the reaction temperature is 500 ° C, the agent-oil mass ratio is 4, and the space velocity is 16 hours -1 The first catalytic cracking reaction and the second catalytic cracking reaction are carried out under certain conditions, the conversion rate, total liquid yield, light oil yield, and six main products dry gas, liquefied gas, gasoline, diesel oil, cracked heavy oil and coke The yield, sulfur content and nitrogen content in gasoline are shown in Table 4.

[0074]From the data in Table 4, it can be seen that compared with the experimental results of VGO direct catalytic cracking, after summarizing the liquefied petroleum gas and gasoline obtained by catalytic cracking of S and A2A3 components respectively, the yields of liquefied petroleum gas and gasoline are respectively higher than 1 The liquefied gas and gasolin...

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Abstract

The invention discloses a method for processing heavy oil by combined process. the method comprises the following steps: a, carrying out separation treatment on heavy oil to obtain a SA1 component and a A2A3 component, wherein with total mass of the SA1 component as the reference, total mass fraction of saturated hydrocarbon and monocyclic aromatics in the SA1 component is greater than 80 wt%; and with total mass of the A2A3 component as the reference, total mass fraction of aromatics with more than one ring and colloid is greater than 75 wt%, and mass fraction of aromatics with more than one ring is greater than 35 wt%; and b, carrying out first catalytic cracking reaction on a SA1 component obtained in the step a, so as to obtain dry gas, liquefied gas, gasoline, diesel oil, coke and cracked heavy oil. According to the method, the SA1 component and the A2A3 components obtained after the separation treatment of heavy oil are respectively subjected to the catalytic cracking reaction. By the method, yield of gasoline and liquefied gas is higher, and sulfur and nitrogen content of gasoline is lower.

Description

technical field [0001] The invention relates to a method for processing heavy oil with a combined process. Background technique [0002] Catalytic cracking technology is the most important secondary processing method for lightening heavy oil, an important production process for light oil products such as liquefied petroleum gas, gasoline, diesel, and a processing process for continuously improving the conversion capacity of heavy oil. The process of target product selection. [0003] At present, the raw materials from the atmospheric and vacuum unit entering the heavy oil catalytic cracking unit are not differentiated in terms of fraction composition and reaction performance. They are all mixed together in the form of blending and sent to the catalytic cracking unit. The conversion is carried out in the reactor and under the same process conditions, and no optimization measures are taken according to the differences in the reactivity of hydrocarbons with different structure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/06
Inventor 赵丽萍田松柏龙军刘泽龙
Owner CHINA PETROLEUM & CHEM CORP
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