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Raw material pretreatment method for improving light performance of residual oil

A lightening and pretreatment technology, applied in the petroleum industry, refining hydrocarbon oil, etc., can solve the problems of lack of understanding of the degree of influence and the specific reasons for the impact, and difficulty in playing a theoretical guiding role, achieving low cost and simple methods. , the effect of safe operation

Inactive Publication Date: 2014-05-21
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

As far as ultrasonic treatment of residual oil is concerned, there are few studies at present, and the known research results only recognize that ultrasonic waves have an impact on residual oil, but there is a lack of understanding of the specific degree of influence and the specific reasons for the impact, so it is difficult to provide theoretical guidance role, it is more difficult to guide the realization of industrialization

Method used

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  • Raw material pretreatment method for improving light performance of residual oil
  • Raw material pretreatment method for improving light performance of residual oil
  • Raw material pretreatment method for improving light performance of residual oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Take 70g of Shengli decompression residue in the anti-permeation airtight bottle A, seal it, place it in the ultrasonic treatment instrument, set the processing temperature, processing power and ultrasonic time, and perform ultrasonic treatment after the temperature reaches the ultrasonic temperature;

[0041] (2) After the ultrasonic treatment is completed, take a certain amount of oil sample, and measure its average relative molecular mass, viscosity, residual carbon value, and density after ultrasonic treatment;

[0042] (3) Take 50g of Shengli decompression residual oil after ultrasonic treatment, and conduct autoclave hydrogenation experiments under certain conditions of specific rotation speed, hydrogen pressure, and operating temperature, and then analyze the composition of its hydrogenation products after treatment under certain conditions;

[0043] (4) Repeat the process (1)-(3) above for Shengli vacuum residue without ultrasonic treatment, and compare the obt...

Embodiment 2

[0047] The preparation steps of this example are the same as Example 1, and the only difference from Example 1 is that the raw material used is Saudi light vacuum residue. After ultrasonic treatment, the properties of Shengli vacuum residue change significantly, and the hydrogenation effect is obviously improved:

[0048] The four-component analysis showed that: the saturated content decreased by 0.88 percentage points, the aromatic content decreased by 6.91 percentage points, the pectin increased by 11.62 percentage points, and the asphaltene decreased by 3.8 percentage points; the average relative molecular weight decreased by 5.99%, the viscosity decreased by 12.3%, and the residual The carbon value decreased by 21.3%, and the density was basically unchanged; the average molecular total carbon number decreased by 3.41, the aromatic carbon number decreased by 1.15, the total ring number decreased by 0.41, and the characteristic parameters of heavy oil increased by 0.04; the li...

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Abstract

The invention provides a raw material pretreatment method for improving the light performance of residual oil. By means of the cavatition and recombination effects of ultrasonic waves, the colloid structure of the residual oil is changed, the structural composition of the residual oil is optimized, the distribution uniformity of four components is promoted, the stability of a colloid system is improved, and the quality of the residual oil is totally improved, so that the hydrogenation effect of the residual oil is remarkably improved. Residual oil from different sources has relatively large difference in ultrasonic treatment effect. Known from hydrotreated data, the method can be used for reducing the average relative molecular weight of the vacuum residual oil by 3-6%, reducing the viscosity by 5-12%, reducing the carbon residue value by about 21-40%, increasing the hydrogenated residual oil conversion ratio by 8-10%, increasing the light oil yield by 7-11% and the like. The method has the advantages of simplicity in treatment, convenience in operation, low cost and capabilities of more remarkably improving the quality of the residual oil, greatly increasing the conversion ratio of the residual oil and ensuring that the treated residual oil is easier to process and treat in processes such as residual oil hydrogenation and the like.

Description

technical field [0001] The invention relates to the research on pretreatment of residue oil, belongs to the field of lightening heavy oil, and particularly provides a method for improving the lightening performance of residue oil. The method is guided by changing the colloidal structure of residual oil, using ultrasonic wave as a treatment method, and treating residual oil with ultrasonic treatment time, ultrasonic treatment temperature, ultrasonic power and ultrasonic treatment frequency as treatment variables. This treatment method has broad industrial application prospects in improving the quality of residual oil and improving the effect of hydrotreating. Background technique [0002] Residual oil is the part of crude oil with the highest boiling point, the largest relative molecular mass, the largest viscosity, the lowest hydrogen-to-carbon ratio, the largest heteroatom content and the most complex chemical structure. With the changes of the domestic and international s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G31/00
Inventor 孙昱东张强杨朝合其他发明人请求不公开姓名
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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