Heavy oil processing combined method

A combined method and heavy oil technology, which is applied in the petroleum industry, hydroprocessing process, and hydrocarbon oil treatment, can solve the problems of low specific gravity of hydrogenated heavy oil, decreased light oil yield, and increased gas yield, so as to improve utilization efficiency, elimination of mutual influence, and the effect of saving oil resources

Active Publication Date: 2017-03-01
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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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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Experimental program
Comparison scheme
Effect test

Embodiment approach

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

[0062] After the heavy oil is separated and processed, the SA1A2 component and the A3 component are obtained, and the obtained SA1A2 component is carried out to the first catalytic cracking reaction to obtain dry gas, liquefied gas, gasoline, diesel oil, coke and cracked heavy oil; the gained A3 component Carry out a hydrotreating reaction, 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 a hydrotreating reaction to obtain a hydrotreating reaction. Hydrogen produces oil. At the same time, the hydrocracking tail oil can be mixed with the SA1A2 component to carry out the first catalytic cracking reaction together.

[0063] The third specific embodiment of the present invention is as follows image ...

Embodiment 1

[0072] This example is used to illustrate the implementation method of the heavy oil separation unit in the combined heavy oil processing method provided by the present invention. The bottom layer of the separation column is filled with 30g neutral alumina (specific surface area is 152 meters) 2 / g, the pore volume is 0.213 ml / g), the middle layer is filled with 110g of alumina loaded with silver ions (the mass fraction of silver is 7.05% by mass, prepared by the silver nitrate impregnation method), and the upper layer is filled with 30g of silica gel (specific surface area is 479 meters 2 / g, the pore volume is 0.349 ml / g); the lower end of the separation column is connected to a vacuum system. The total volume of stationary phase was 150 mL. Take 10.15g (11.13mL) of vacuum distillate oil (VGO, Tahe crude oil from Tahe Oilfield of Sinopec Northwest Branch, and obtain Tahe vacuum wax oil by real boiling point distillation in the Research Institute of Petrochemical Engineering...

Embodiment 2

[0074] like figure 1 As shown, the SA1A2 component and the A3 component obtained in Example 1 were respectively used as catalytic cracking raw materials, the reaction temperature was 500 ° C, the mass ratio of agent oil was 4, and the space velocity was 16 hours -1 The first catalytic cracking reaction and the second catalytic cracking reaction are carried out under the conditions of The yields, sulfur content and nitrogen content of gasoline are shown in Table 4.

[0075]From the data in Table 4, it can be seen that compared with the experimental results of direct catalytic cracking of VGO, after the liquefied gas and gasoline obtained by the catalytic cracking of SA1A2 and A3 components are respectively summarized, the summary results of liquefied gas and gasoline yields 1 are higher respectively. The liquefied gas and gasoline yields of the direct catalytic cracking of the wax oil, the sulfur content and the nitrogen content in the gasoline are lower than the gasoline sulf...

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Abstract

The invention discloses a heavy oil processing combined method. The method comprises a. separating heavy oil to obtain components SA1A2 and A3, wherein the component SA1A2 comprises greater than 80% by mass of a saturated hydrocarbon, a mono-aromatic hydrocarbon and a diaromatic hydrocarbon and the component A3 comprises greater than 50% by mass of colloid and aromatic hydrocarbons with two or more aromatic rings, and b, carrying out a first catalytic cracking reaction process on the component SA1A2 to obtain dry gas, liquefied gas, gasoline, diesel oil, coke and cracked heavy oil. Through catalytic cracking of the components SA1A2 and A3 obtained by separating the heavy oil, high gasoline and liquefied gas yields and low gasoline sulfur and nitrogen content are obtained.

Description

technical field [0001] The invention relates to a combined method for heavy oil processing. Background technique [0002] Catalytic cracking process is the most important secondary processing method for lightening heavy oil, an important production process of light oil products such as liquefied petroleum gas, gasoline and diesel, and a processing process that continuously improves the conversion capacity of heavy oil. The process of target product selection. [0003] At present, the raw materials from the atmospheric and vacuum units entering the heavy oil catalytic cracking unit are not distinguished from the composition of fractions and their reaction performance. The conversion was carried out in the reactor and under the same process conditions, and no optimization measures were taken according to the difference in the reaction performance of hydrocarbons with different structures. A large number of easy-to-convert hydrocarbons in the feedstock react with non-hydrocar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/00C10G69/00
Inventor 赵丽萍田松柏龙军刘泽龙
Owner CHINA PETROLEUM & CHEM CORP
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