Heavy oil hydrogenation modifying method

A heavy oil upgrading and heavy oil technology, which is applied in the fields of hydrocarbon oil cracking and petroleum industry, can solve the problem of high coking rate, achieve the effects of reducing coking rate, restoring hydrogen supply capacity, and reducing coking tendency

Active Publication Date: 2011-05-04
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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Experimental program
Comparison scheme
Effect test

Embodiment -1

[0028] After the Tahe residual oil is treated with the same filtration as the conventional process, add 200 μg / m water-soluble or oil-soluble multi-metal catalyst (using Ni-containing salt and Mo-containing salt as raw materials, the atomic ratio of the two metals is 1:3) solution , and mixed with the supercritical hydrogen-donating solvent tetrahydronaphthalene (tetralin accounts for 2% of the residual oil raw material) for suspension bed hydrocracking, the conditions are conventional process operating conditions, temperature: 390 ° C, pressure 15 MPa, space velocity 1.0h -1 , the ratio of hydrogen to oil is 600:1, and the conversion rate of the suspension-bed hydrocracking is 62%. The suspension-bed hydrocracking can operate stably for a long period at this low conversion rate.

[0029] The reacted product enters the separator after being filtered to separate the gas phase and the liquid phase, and the liquid phase enters the fractionation tower. A fractionation column sepa...

Embodiment -2

[0031] Using Tahe residual oil as raw material, the suspension bed hydrocracking steps are the same as in Example-1, the reaction temperature is controlled at 405°C, and the conversion rate is 74%. Suspension bed hydrocracking can operate stably for a long period at this conversion rate. However, the supercritical hydrogen-donating solvent is decahydronaphthalene, which accounts for 2% of the heavy oil raw material. After being processed by the method of the present invention, the reaction results are shown in Table 2.

Embodiment -3

[0033] By the same method as in Example 2, water was added while using decahydronaphthalene, and water accounted for 2% of the heavy oil raw material. The reaction results are shown in Table 2.

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Abstract

The invention discloses a heavy oil modifying method which comprises the following steps: mixing a heavy oil raw material with a homogeneous catalyst, and mixing with a supercritical hydrogen supply solvent, wherein the content of the hydrogen supply solvent in the heavy oil raw material is 50 mug/g-5wt%; and in the presence of hydrogen, carrying out heavy oil hydrocracking reaction on the mixture of the heavy oil raw material, the catalyst and the hydrogen supply solvent under certain reaction conditions. In the heavy oil modifying method, suspension bed hydrocracking and supercritical treatment are organically combined, and the respective advantages are given full play to achieve the effect of synergic cooperation, thereby reducing the coking tendency, enhancing the impurity removal capacity and also enhancing the operational stability of the suspension bed hydrocracking.

Description

technical field [0001] The invention relates to a heavy oil hydrogenation upgrading method, in particular to a suspension bed hydrocracking method using a supercritical hydrogen-donating solvent. 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% to 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. The deep processing technology of residual oil has become the focus of the development of the world oil refining industry. [0003] The currently industrialized methods for treating these residual oils or heavy oils include: catalytic cracking, residual oil hydrogenation, delayed c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G47/34
Inventor 刘建锟杨涛胡长禄贾永忠
Owner CHINA PETROLEUM & CHEM CORP
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