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Simple method for separating and extracting asphaltene from asphalt at room temperature

A bituminous, room temperature technology, applied in the field of petroleum asphalt, can solve the problems of high economic cost, time and energy consumption, etc., and achieve the effects of high safety, avoiding potential safety hazards, and short standing time

Active Publication Date: 2022-05-31
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the need for professional extraction devices in the prior art, time-consuming and energy-consuming, high economic costs, and safety risks caused by heating and high-temperature flammable steam

Method used

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  • Simple method for separating and extracting asphaltene from asphalt at room temperature

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Experimental program
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Embodiment 1

[0041] The present embodiment provides a method for extracting asphaltenes from asphalt at room temperature, comprising the following steps:

[0042] Put 5 g of base pitch into a 200 mL round-bottomed flask, pour 45 mL of xylene, and stir for 30 min to dissolve completely. The inorganic matter and residual carbon were removed by filtration (filter cake 1), rinsed with 5 mL of xylene, and the filtrate 1 was combined and set aside for later use.

[0043] Take a 500 mL beaker, pour 450 mL of n-heptane, and add magnetic stirring. The above filtrate was dropped into a beaker. After dropping for 30 min, it was filtered, the obtained filter cake 2 was rinsed with 50 mL of n-heptane, and the filtrate 2 was combined and set aside for later use.

[0044] Filter cake 2 was dried at room temperature for 8 h to constant weight to obtain asphaltenes. After weighing and calculating the yield (as shown in Table 1, the mass percentage of the obtained asphaltenes and matrix asphalt), it was ...

Embodiment 2

[0048] The present embodiment provides a method for extracting asphaltenes from asphalt at room temperature, comprising the following steps:

[0049] Put 5 g of base pitch into a 200 mL round-bottomed flask, pour 45 mL of toluene, and stir for 30 min to dissolve completely. Inorganic matter and residual carbon were removed by filtration (filter cake 1), rinsed with 5 mL of toluene, and the filtrate 1 was combined and set aside for later use.

[0050] Take a 500 mL beaker, pour 450 mL of n-heptane, and add magnetic stirring. The above filtrate was dropped into a beaker. After dropping for 30 min, it was filtered, the obtained filter cake 2 was washed with 50 mL of n-heptane, and the filtrate 2 was combined and set aside for later use.

[0051] Filter cake 2 was vacuum-dried at room temperature for 8 h to constant weight to obtain asphaltenes. After weighing and calculating the yield (as shown in Table 1), it was sealed and stored.

[0052] The subsequent recovery solvent an...

Embodiment 3

[0054] The present embodiment provides a method for extracting asphaltenes from asphalt at room temperature, comprising the following steps:

[0055] Put 5 g of base pitch into a 200 mL round-bottomed flask, pour 45 mL of xylene, and stir for 30 min to dissolve completely. The inorganic matter and residual carbon were removed by filtration (filter cake 1), rinsed with 5 mL of xylene, and the filtrate 1 was combined and set aside for later use.

[0056] Take a 500 mL beaker, pour 450 mL of n-hexane, and add magnetic stirring. The above filtrate was dropped into a beaker. After dropping for 30 min, filter, the obtained filter cake 2 was rinsed with 50 mL of n-hexane, and the filtrate 2 was combined and set aside for later use.

[0057] Filter cake 2 was dried at room temperature overnight (12 h) to constant weight to obtain asphaltenes. After weighing and calculating the yield (as shown in Table 1), it was sealed and stored.

[0058] The subsequent recovery solvent and eleme...

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Abstract

The invention relates to the technical field of petroleum asphalt, and particularly provides a simple method for separating asphaltene from matrix asphalt to obtain the asphaltene by utilizing the solubility difference of each component of the asphalt in different solvents at room temperature. The different solvents comprise a good asphaltene solvent and a poor asphaltene solvent. The preparation method comprises the following steps: 1) dissolving asphalt in a good solvent to obtain a solution containing asphaltene, and filtering to remove inorganic matters and residual carbon; (2) dropwise adding the solution containing asphaltene into straight-chain alkane to separate out asphaltene to obtain turbid liquid; and 3) standing the turbid liquid, filtering, and drying a filter cake to obtain an asphaltene solid. Experiments show that the extract obtained by using the method conforms to element and structural characteristics of asphaltene, the asphaltene yield is high, and the problems that in the prior art, a professional extraction device is needed, time and energy are consumed, the economic cost is high, and flammable steam has safety risks under heating and high-temperature conditions can be solved.

Description

technical field [0001] The present disclosure relates to the technical field of petroleum asphalt, and specifically provides a simple method for separating and extracting asphaltenes from asphalt without heating and refluxing at room temperature by utilizing the differences in the solubility of each component of the asphalt in different solvents. Background technique [0002] The statements herein merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] Asphaltene is one of the important components of asphalt, and its content and structure have a great influence on the physical properties of asphalt, such as penetration, softening point, ductility, high temperature stability, and anti-rutting performance. It is generally believed that asphalt is a colloid or micelle structure with asphaltene as the core. In order to analyze the composition and aggregate structure of asphaltenes and change the asphaltene co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C3/08
CPCC10C3/08
Inventor 孙大川宋杨赵相龙任瑞波赵品晖周浩赵全满赵守豪周恒旭张宇崔桐石睿慈东超徐林旭尹利洋
Owner SHANDONG JIANZHU UNIV
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