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A Method for Determining Process Parameters of Refined Asphalt Prepared by Solvent Method Using Phase Diagram

A technology for refining asphalt and process parameters, which is applied in the processing of tar asphalt/petroleum asphalt/natural asphalt, processing tar asphalt/petroleum asphalt/natural asphalt by distillation, and processing tar asphalt/petroleum asphalt/natural asphalt by selective extraction, etc. It can solve the problems of heavy test workload and low optimization precision, and achieve the effect of smooth production operation and improved economy

Active Publication Date: 2017-11-17
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of preparing refined asphalt by solvent method, the determination of two important process parameters, the mass ratio of aliphatic solvent and aromatic solvent and the mass ratio of mixed solvent and raw asphalt, has the problems of large experimental workload and low optimization accuracy. The present invention provides a A method for determining the technical parameters of the refined asphalt prepared by the solvent method by using the phase diagram. During the production operation, according to the range of the operable area indicated in the phase diagram, important operating parameters are formulated to avoid the phenomenon of unqualified quality caused by unsmooth settlement.

Method used

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  • A Method for Determining Process Parameters of Refined Asphalt Prepared by Solvent Method Using Phase Diagram
  • A Method for Determining Process Parameters of Refined Asphalt Prepared by Solvent Method Using Phase Diagram
  • A Method for Determining Process Parameters of Refined Asphalt Prepared by Solvent Method Using Phase Diagram

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The pitch used is coal tar soft pitch; the aliphatic solvent used is kerosene; the aromatic solvent used is light washing oil;

[0027] Mix asphalt with a mixed solvent. The mixed solvent is composed of an aromatic solvent and an aliphatic solvent. In the mixed solution after mixing, the mass ratio of the aromatic solvent, the aliphatic solvent and the asphalt is 1: (0.125~1): (0.125~8);

[0028] Heat the mixed solution to 60°C and start stirring. When the temperature rises to 120°C, keep it warm and continue to stir for 30 minutes, then stop stirring, and settle at 120°C for 2 hours; the upper layer of the material after the settlement is taken out as the light phase, and the rest as the heavy phase. The mass ratio of the light phase to the heavy phase is 1:0.55; observe the flow state of the heavy phase, whether the heavy phase is poured smoothly, whether it is viscous, whether there are solids in the heavy phase residue, and whether there are lumps Phenomena such as...

Embodiment 2

[0040] Method is with embodiment 1, and difference is:

[0041] (1) The bitumen used is coal tar soft pitch; the aliphatic solvent used is paraffin oil; the aromatic solvent used is light washing oil;

[0042] (2) Heat the mixed solution to 80°C and start stirring. When the temperature rises to 100°C, keep it warm and continue stirring for 40 minutes, then stop stirring, and settle at 100°C for 5 hours; the mass ratio of light phase to heavy phase is 1:0.35;

[0043] (3) Obtain 26 sets of experimental data;

[0044] (4) The proportioning ratio of each substance in the experiment is shown in Table 2;

[0045] Table 2

[0046] Test No.

Coal tar soft pitch / %

Paraffin oil / %

Washing oil / %

1

30

40

30

2

40

30

30

3

30

40

30

4

65

15

20

5

50

20

30

6

20

20

60

7

20

20

60

8

80

10

10

9

10

10

80

10

60

30

10

11

7...

Embodiment 3

[0050] Method is with embodiment 1, and difference is:

[0051] (1) The pitch used is coal tar medium temperature pitch; the aliphatic solvent used is kerosene; the aromatic solvent used is light washing oil;

[0052] (2) Heat the mixed solution to 100°C and start stirring. When the temperature rises to 150°C, keep it warm and continue stirring for 20 minutes, then stop stirring, and settle at 150°C for 1 hour; the mass ratio of the light phase to the heavy phase is 1:1;

[0053] (3) Obtain 25 sets of experimental data;

[0054] (4) The proportioning ratio of each substance in the experiment is shown in Table 3

[0055] table 3

[0056] Test No.

[0057] Depend on image 3 The scope of the operation area can be seen: when the ratio of coal tar medium-temperature asphalt is between 50-60%, the ratio of washing oil is between 20-30%, and the ratio of kerosene is between 15-20%, the process operation parameters aromatic hydrocarbon solvent and fat The mass ratio of ...

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Abstract

A method for determining parameters of a solvent method based refined asphalt preparing process by utilizing a phase diagram comprises the following steps that 1, asphalt is mixed with the mixed solvent prepared by an aromatic solvent and an aliphatic solvent; 2, heating and mixing are performed, settlement is performed at the temperature of 100-150 DEG C, the upper-layer substance of the material completing settlement is taken out to serve as a light phase, the remaining serves as a heavy phase, and the flow state of the heavy phase is observed; 3, the aromatic and aliphatic solvents in the light phase and the heavy phase are respectively evaporated out; 4, the quinoline insoluble content of refined asphalt is detected; 5, the experiment steps are repeated to draw the ternary phase diagram so as to determine the parameters of the solvent method based refined asphalt preparing process. By means of the method, operating parameters for preparing refined asphalt can be rapidly determined, production operation can be smooth, and the economical efficiency of device operation is improved.

Description

technical field [0001] The invention belongs to the technical field of asphalt refining, in particular to a method for determining process parameters for preparing refined asphalt by using a phase diagram. Background technique [0002] Refined asphalt is a kind of pitch with quinoline insoluble (QI) content less than 0.1%, and it is a high-quality raw material for preparing needle coke. With the in-depth research on asphalt deep-processing products such as needle coke, mesocarbon microspheres, high-performance carbon fiber, and high-quality impregnating agent asphalt, the quality requirements for its raw material refined asphalt are getting higher and higher. Researchers have developed a variety of asphalt refining method. At present, there are two common methods applied to industrial production at home and abroad: flash polycondensation method and solvent extraction sedimentation method. [0003] The solvent extraction and sedimentation method uses aromatic solvents and a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C3/00C10C3/06C10C3/08
Inventor 赵雪飞赖仕全程俊霞高丽娟朱亚明
Owner UNIV OF SCI & TECH LIAONING
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