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Combined process for heavy oil modification

A combination process and heavy oil upgrading technology, applied in the petroleum industry, hydroprocessing process, hydrocarbon oil treatment, etc., can solve the problem of high coking rate, achieve enhanced reaction effect, reduce coking tendency, and improve the ability to remove impurities Effect

Active Publication Date: 2011-01-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the thermal cracking reaction is carried out in supercritical water, the coking side reaction is reduced compared with the ordinary thermal cracking process, but the coking rate is still high for inferior raw materials

Method used

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  • Combined process for heavy oil modification
  • Combined process for heavy oil modification
  • Combined process for heavy oil modification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment -1

[0021] Tahe residual oil is subjected to solvent deasphalting after the same filtration and other treatment as the conventional process. The conditions are conventional solvent deasphalting conditions. The extraction part generally adopts a one-stage extraction process, and can also adopt a two-stage extraction process. It can be deasphalted with propane, butane or pentane. The pressure at the top of the extraction tower is generally 3.2MPa, the temperature at the top of the tower is 70°C, and the solvent ratio (volume) is 10:1.

[0022] Deasphalted oil can be processed by catalytic cracking, hydrocracking and other conventional processes.

[0023] Deoiled asphalt is carried out supercritical treatment again, joins static mixer with tetralin, (keep excessive tetralin, the weight ratio of deoiled asphalt and tetralin is 1: 6), after material heating then, enters CSTR ( Continuous Stirred Tank Reactor), pressurize, heat up and start stirring, the rotation speed is 800 rpm, press...

Embodiment -2

[0025] Using Tahe residual oil as raw material, the steps of solvent deasphalting are the same as in Example-1. Solvent deasphalting and deoiling asphalt are subjected to supercritical treatment, the hydrogen-donating solvent is decahydronaphthalene, the weight ratio of deoiling asphalt and hydrogen-donating solvent is 1:2, the reaction pressure is 35MPa, the reaction temperature is 450°C, and the reaction time is 0.5h ( CSTR is continuous feeding and discharging, and the reaction time is the average residence time of the material). After being processed by the method of the present invention, the reaction results are shown in Table 2.

Embodiment -3

[0027] By the same method of embodiment 2, water is also added when using decahydronaphthalene, and the weight ratio of water and supercritical treatment feed is 1: 1, and reaction result is shown in Table 2.

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Abstract

The invention discloses a combined process for heavy oil modification. A heavy oil raw material is first subjected to solvent de-asphalting treatment, the de-asphalted oil obtained by the solvent de-asphalting is subjected to catalytic cracking or hydro-cracking treatment, and the de-oiled asphalt obtained by the solvent de-asphalting is subjected to supercritical treatment, wherein the supercritical treatment method for the de-oiled asphalt comprises supercritical treatment of mixture of de-oiled asphalt and hydrogen supply solvent, the hydrogen supply solvent comprises tetrahydronaphthaleneor decahydronaphthalene, the mixing weight ratio of the heavy oil raw material to the hydrogen supply solvent is 1:0.5-1:10, and the supercritical treatment is performed for 0.2 to 5 hours under the pressure of 15 to 40MPa at the temperature of between 300 and 500 DEG C. The method can effectively improve the utilization rate of poor-quality heavy oil, has low coking rate and stable production process, and can be used for light treatment of various heavy and poor raw materials.

Description

technical field [0001] The invention relates to a combined process for upgrading heavy oil, in particular to a combined process for upgrading inferior heavy oil. Background technique [0002] At present, due to the depletion of oil resources and the increasing demand for oil due to economic development, oil resources are increasingly precious. Moreover, as crude oil resources become heavier, in the refining process of petroleum, the yield of residual oil is relatively high, generally 40%-50%. In addition, there are many heavy crude oils in the crude oil reserves in the world, most of which are residues, and they are low-quality residues with high impurity content. [0003] The currently industrialized methods for treating these residual oils or heavy oils include: catalytic cracking, residual oil hydrogenation, delayed coking, visbreaking and other methods or combined methods. As the residual oil becomes more and more inferior, and the content of sulfur, nitrogen and metal...

Claims

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Application Information

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IPC IPC(8): C10G67/16
Inventor 刘建锟杨涛胡长禄韩照明韩庆和于斌
Owner CHINA PETROLEUM & CHEM CORP
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