A kind of inferior heavy oil processing method

A technology of inferior heavy oil and processing method, applied in the petroleum industry, hydrotreating process, processing hydrocarbon oil, etc., can solve the problems of complex operation, difficult operation, poor device stability, etc., to expand the scope of application, improve the reaction effect, reduce The effect of investment cost

Active Publication Date: 2015-09-30
CHINA PETROLEUM & CHEM CORP +1
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  • Claims
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AI Technical Summary

Problems solved by technology

Among them, the fixed bed conversion rate is low (generally lower than 35%), which mainly provides high-quality raw materials for catalytic cracking units; The oil needs to be further processed to obtain qualified products; the suspension bed can obtain a higher conversion rate (generally higher than 80%), but the stability of the device is poor, and it is still difficult to realize industrial operation; the moving bed is between the fixed bed and the ebullating bed Among them, the existing problem is that the device is complicated and the operation is difficult
For ebullating bed reactors, each reactor requires a set of online catalyst addition system, which requires a high investment (accounting for about half of the total investment of ebullated bed hydrogenation units after evaluation), and the operation Complex, with the highest failure rate

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  • A kind of inferior heavy oil processing method

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Experimental program
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Effect test

Embodiment 1

[0034] In this example, a combined process of solvent deasphalting, ebullating bed and fixed bed is used for residual oil hydrotreating. First, the residual oil raw material and pentane solvent are uniformly mixed in a static mixer, and then enter a two-stage solvent deasphalting device to obtain deasphalted oil and deoiled asphalt. After preheating, the deoiled asphalt is mixed with hydrogen and enters the fluidized bed for hydrotreating The device performs hydrogenation reaction under the prepared fluidized bed hydrogenation catalyst and process conditions, removes sulfur, nitrogen, metal and other heteroatoms in the raw material, and at the same time converts asphaltenes into colloids or smaller molecules, reducing product viscosity , the hydrogenation reaction effluent is mixed with the deasphalted oil into the fixed-bed hydrogenation unit for reaction, and the resulting oil is obtained under the fixed-bed graded catalyst and reaction conditions. The properties of raw mate...

Embodiment 2

[0044] Compared with Example 1, the ebullated bed reactor uses a mixed catalyst. The long-term stability of the fixed bed is good, see Table 4 for details, and the temperature of the fixed bed reactor was increased by 3°C at 5000, 8000 and 12000 hours.

[0045] Table 4 Stability results of fixed bed hydrogenation reaction system.

[0046] Example Example 1 Example 2 running time, hours Final oil metal content (μg / g) / total pressure drop of fixed bed reaction system (MPa) Final oil metal content (μg / g) / total pressure drop of fixed bed reaction system (MPa) 500 15.8 / 0.06 13.5 / 0.06 1000 17.6 / 0.08 14.7 / 0.08 3000 18.2 / 0.09 15.4 / 0.09 5000 17.5 / 0.10 14.2 / 0.10 8000 19.1 / 0.12 13.5 / 0.12 12000 18.7 / 0.13 13.1 / 0.13

[0047] As can be seen from the stability experiment results of the above-mentioned fixed bed reaction system, the method of the present invention can realize the long-term stable operation of the fixed bed hydro...

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Abstract

The invention discloses a processing method for inferior heavy oil. The processing method comprises the following steps: (1) allowing the raw material inferior heavy oil to enter into a solvent deasphalting apparatus so as to obtain deasphalted oil and de-oiled asphalt; (2) allowing the de-oiled asphalt obtained in step (1) to enter into a fluidized bed hydrotreatment unit and carrying out fluidized bed hydrotreatment in the presence of hydrogen and a fluidized bed hydrotreatment catalyst; and (3) mixing an effluent obtained after fluidized bed hydrotreatment in step (2) with the deasphalted oil, allowing an obtained mixture to enter into a fixed bed hydrotreatment unit and carrying out fixed bed hydrotreatment in the presence of hydrogen and a fixed bed hydrotreatment catalyst, wherein resultant oil of an effluent of fixed bed hydrotreatment is used as a raw material for a catalytic cracking apparatus. Compared with the prior art, the method provided by the invention has the advantages of widely available raw materials, low investment for equipment, stable running, a long operation period and capacity of maximumly removing impurities in the raw material and providing a high-quality raw material for the catalytic cracking apparatus.

Description

technical field [0001] The invention relates to a processing method of low-quality heavy oil, which is especially suitable for low-quality residual oil with high heavy metal content. It is a processing method combined with decarburization and hydrogenation processes. A processing method that organically combines a process to effectively deal with inferior heavy oil. Background technique [0002] With the increase of heavy and inferior crude oil and the change of market demand structure for light oil, the processing technology of inferior heavy oil (including various heavy oil and residual oil, etc.) has become the research focus of major oil companies and petroleum scientific research institutions direction. The processing of inferior heavy oil is not only to crack it into products with low boiling point, such as naphtha, middle distillate oil and vacuum gas oil, but also to increase their hydrogen-carbon ratio, so the basic way of its processing is basically There are two...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00
Inventor 朱慧红方向晨孙素华刘杰杨光金浩
Owner CHINA PETROLEUM & CHEM CORP
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