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Preparation method of crude oil asphaltene and application thereof

A technology for asphaltenes and crude oil, which is applied in the processing of tar pitch/petroleum pitch/natural pitch, processing tar pitch/petroleum pitch/natural pitch by heating, petroleum industry, etc. Insufficient, restricting accuracy and other problems, to achieve the effect of simple steps, short operation time and good results

Active Publication Date: 2017-11-21
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Because conventional oil and gas geochemical studies often only analyze saturated hydrocarbons and aromatic components, there are few studies on non-hydrocarbon and asphaltene components (especially asphaltene components), so the existing technology does not pay enough attention to the purity of asphaltenes
With the deepening of oil and gas geochemical research, various analysis techniques for asphaltene are gradually developing, but the impurities in asphaltene restrict the accuracy of various experimental results

Method used

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  • Preparation method of crude oil asphaltene and application thereof

Examples

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Effect test

Embodiment 1

[0023] Add 30mL of n-hexane to 50mg of crude oil (taken from TK 683 well in an oilfield, the same below), stir well, take the precipitate, separate and collect it to obtain crude asphaltenes. Put 5 mg of crude asphaltenes into a round bottom flask, add 1 mL of dichloromethane, stir well to disperse the asphaltenes. Then add 10 mL of mixed solvent of n-heptane and acetone with a weight ratio of 1:1, connect a condenser, heat in an oil bath at 90°C for 6 hours, let it stand for 6 hours after cooling, and then filter through a funnel with quantitative filter paper. Use a triangular flask to receive the filtrate. Wash the round-bottomed flask with n-heptane until the filtrate is colorless, and then wash the outside of the lower opening of the funnel with n-heptane to elute the high molecular hydrocarbons precipitated at the outlet of the funnel. Replace with a new triangular flask to receive the filtrate, and use chloroform to elute the asphaltenes on the quantitative filter pape...

Embodiment 2

[0026] Add 30 mL of n-heptane to 50 mg of crude oil, stir well, take the precipitate, separate and collect it to obtain the crude product of asphaltenes. Put 5 mg of crude asphaltenes into a round bottom flask, add 1 mL of dichloromethane, stir well to disperse the asphaltenes. Then add 10 mL of mixed solvent of n-hexane and chloroform with a weight ratio of 10:1, connect a condenser, heat in an oil bath at 70°C for 6 hours, let it stand for 6 hours after cooling, and then filter through a funnel with quantitative filter paper, and use The triangular flask receives the filtrate. Wash the round-bottomed flask with n-octane until the filtrate is colorless, then rinse the outside of the lower opening of the funnel with n-octane to elute the polymer hydrocarbons precipitated at the outlet of the funnel. Replace with a new Erlenmeyer flask to receive the filtrate, elute the asphaltenes on the quantitative filter paper with benzene chloroform until the filtrate is colorless, and ob...

Embodiment 3

[0029] Add 30mL of n-hexane into 60mg of crude oil, stir well, take the precipitate, separate and collect it to obtain the crude product of asphaltenes. Put 6 mg of crude asphaltenes into a round bottom flask, add 1 mL of dichloromethane, stir well to disperse the asphaltenes. Then add 10 mL of mixed solvent of n-heptane and benzene with a weight ratio of 10:1, connect a condenser, heat in an oil bath at 90°C for 6 hours, let it stand for 6 hours after cooling, and then filter through a funnel with quantitative filter paper. Use a triangular flask to receive the filtrate. Wash the round-bottomed flask with n-heptane until the filtrate is colorless, and then wash the outside of the lower opening of the funnel with n-heptane to elute the high molecular hydrocarbons precipitated at the outlet of the funnel. Replace with a new triangular flask to receive the filtrate, and use toluene to elute the asphaltenes on the quantitative filter paper until the filtrate is colorless to obta...

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Abstract

The invention provides a preparation method of crude oil asphaltene. The preparation method comprises the following steps: (1) a nonpolar organic solvent is added into crude oil, and separating, collection and deposition are carried out in order to obtain an asphaltene crude product; (2) the asphaltene crude product obtained in the step (1) is dissolved in the polar organic solvent, a mixed solvent is added, and separating is carried out in order to obtain a solid state mixture; (3) an organic solvent in the mixture obtained in the step (2) is removed in order to obtain the crude oil asphaltene product. Pure crude oil asphaltene is obtained in order to provide a pure sample for researching in the fields of oil gas geochemistry, petroleum engineering, petrochemical industry and the like. The invention also provides an application of the method to the field of petrochemical industry.

Description

technical field [0001] The invention relates to the application technical field of oil exploration and development and oil and gas geochemical research, in particular to a method for preparing crude oil asphaltenes. The invention also relates to the application of the preparation and purification method in the field of petroleum processing. Background technique [0002] Crude oil asphaltene is a mixture of macromolecules with an aromatic core formed by polycondensation of multiple aromatic rings as the core unit, and multiple branched chains around the aromatic core, which has strong polarity. The existing asphaltene preparation method is based on the Petroleum and Natural Gas Industry Standard of the People's Republic of China "Analysis of Soluble Organic Matter and Crude Oil Group Components in Rocks" (SY / T5119-2008) and the Petrochemical Industry Standard of the People's Republic of China "Determination of Four Components of Petroleum Asphalt". "Methods" (NB / SH / T 0509-20...

Claims

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Application Information

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IPC IPC(8): C10C3/00
CPCC10C3/002
Inventor 陶国亮刘鹏曹婷婷张志荣蒋启贵黎茂稳刘文汇秦建中腾格尔申宝剑
Owner CHINA PETROLEUM & CHEM CORP
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