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Combined process method for modifying heavy oil

A combined process and heavy oil upgrading technology, applied in the petroleum industry, hydrotreating process, hydrocarbon oil cracking, etc., can solve the problem of high coking rate, improve the yield of light oil, reduce the dosage, and improve the fusion effect and reaction. effect of effect

Inactive Publication Date: 2012-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 method for modifying heavy oil
  • Combined process method for modifying heavy oil
  • Combined process method for modifying heavy oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment -1

[0023] After the Tahe residual oil is treated with the same filtration as the conventional process, it is added to the static mixer with tetralin (keep excess tetralin, the weight ratio of heavy oil to tetralin is 1:6), Then perform supercritical treatment. For example, after the material is heated, it enters the CSTR (Continuously Stirred Tank Reactor), pressurizes, heats up and starts stirring at a speed of 800 rpm, pressurizes to 20MPa, and heats up to 400°C. The reaction time is 3h. The material after supercritical treatment is separated, and the light part is subjected to hydrogenation treatment. The conditions are: temperature: 400°C, pressure 15MPa, space velocity 1.5h -1 , The volume ratio of hydrogen to oil is 800:1. The heavy part is used for IGCC gasification power generation, and the conditions are conventional process operating conditions, such as gasification, heat recovery, purification and several parts of gas turbine and steam turbine power generation. Excess...

Embodiment -2

[0025] Using Tahe residual oil as raw material, the steps are the same as in Example-1. Perform supercritical treatment, the hydrogen-donating solvent is decahydronaphthalene, the weight ratio of Tahe residual oil 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 a continuous feed Discharging, 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 method for modifying heavy oil, which comprises the following contents: a heavy oil raw material is pretreated first to remove water and mechanical impurities; then supercritical treatment is performed in the presence of a hydrogendonating solvent and in a supercritical or subcritical state; and light oil obtained after supercritical treatment is subjected to hydrogenation treatment or catalytic cracking treatment, and a heavy component obtained after supercritical treatment is treated by an integrated gasification combined cycle (IGCC) technique. When the method is used, the impurities in low-quality heavy oil can be removed effectively, and the utilization rate of a heavy oil raw material can be improved effectively.

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, the price of oil has risen rapidly. Moreover, as crude oil resources become heavier, in the refining process of petroleum, the yield of residual oil is relatively high, generally 40%-50% of the weight of crude oil. In addition, a large part of the world's crude oil reserves is heavy crude oil, and most of its composition is residual oil, and it is low-quality residual oil 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, gasification and integrated combined cycle technology (IGCC) and other methods or combined methods. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02C10G69/04C10G47/34
Inventor 刘建锟杨涛胡长禄蒋立敬贾永忠王志勇
Owner CHINA PETROLEUM & CHEM CORP
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