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A kind of heavy oil processing combined method

A combined method and heavy oil technology, which are applied in the petroleum industry, hydrotreating process, processing hydrocarbon oil, etc., can solve the problems of low specific gravity of hydrogenated heavy oil, increase in gas yield, decrease in yield of light oil, etc., so as to improve utilization efficiency, eliminate mutual influence, and save the effect of oil resources

Active Publication Date: 2018-05-18
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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  • A kind of heavy oil processing combined method
  • A kind of heavy oil processing combined method
  • A kind of heavy oil processing combined method

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Experimental program
Comparison scheme
Effect test

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 SA1A2 component and the A3 component are obtained, and the obtained SA1A2 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 A3 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 SA1A2 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:

[0064] After t...

Embodiment 1

[0072] This example is used to illustrate the implementation method of the heavy oil separation unit in the heavy oil processing combined method 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, the pore volume is 0.213 milliliters / gram), the aluminum oxide (the massfraction of silver is 7.05 mass %, adopts the silver nitrate impregnation method preparation) of 110g load silver ions in the middle of filling, the 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. Get vacuum distillate oil (VGO, Tahe crude oil is taken from the Tahe Oilfield of Sinopec Northwest Branch, and obtain Tahe vacuum wax oil through true boiling point distillation at the Research Institute of Petrochemical Sc...

Embodiment 2

[0074] Such as figure 1 As shown, the SA1A2 component and A3 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 Under the conditions of the first catalytic cracking reaction and the second catalytic cracking reaction, the conversion rate, total liquid yield, light oil yield, and six main products dry gas, liquefied gas, gasoline, diesel, cracked heavy oil and coke The yield, sulfur content and nitrogen content in gasoline are shown in Table 4.

[0075]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 SA1A2 and A3 components respectively, the yields of liquefied petroleum gas and gasoline are respectively higher than 1 The liquefied gas and gasoline yields of direct cata...

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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 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 structures. A large amo...

Claims

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Application Information

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Patent Type & Authority Patents(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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