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Low-energy-consumption removal method of quinoline insolubles in asphalt

A low-energy-consumption, asphalt technology, 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. Solve the problems of long settling time, increase product cost, and increase energy consumption, and achieve the effect of saving process time and reducing energy consumption

Inactive Publication Date: 2013-06-26
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the more mature method in the industry is to use a single-solvent or double-solvent mixed sedimentation method. This method has a good removal effect, but requires a long settling time (generally 5~24h). Since the settling process requires heat preservation operation, it needs to be provided by the outside world. Energy, longer processing time directly leads to increased energy consumption, ultimately increasing product costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] (1) Mix 100g polyaluminum chloride (solid, GB / T 22627-2008), 1000g deionized water, and 8000g ethylene glycol at room temperature, and stir for 2 hours to obtain a flocculation solution;

[0013] (2) Add 2000g of washing oil (GB / T 24217-2009) to 1000g of asphalt to be treated (the mass content of quinoline insoluble matter is 4.7%), raise the temperature to 95°C, stir at constant temperature for 1 hour, and obtain the asphalt / washing oil mixture;

[0014] (3) Add 600g of flocculation solution to the above asphalt / washing oil mixture, stir at 105°C for 1 hour to obtain a primary treatment solution, centrifuge the treatment solution at a speed of 2000r / min for 45min and then separate into layers, the upper layer is the secondary treatment solution , the lower layer is a viscous black liquid enriched with quinoline insolubles, this liquid can be used as a raw material in other fields, such as the production of binders;

[0015] (4) Ethylene glycol is distilled from the sec...

Embodiment 2

[0017] (1) Mix 150g polyaluminum chloride, 700g deionized water, and 5500g propylene glycol at room temperature, and stir for 2 hours to obtain a flocculation solution;

[0018] (2) Add 1,500g of washing oil to 1,000g of asphalt to be treated, heat up to 80°C, stir at a constant temperature for 1.5h, and obtain the asphalt / washing oil mixture;

[0019] (3) Add 300g of flocculation solution to the above asphalt / washing oil mixture, stir at 95°C for 1.5h to obtain a primary treatment solution, centrifuge the treatment solution at a speed of 2000r / min for 30min and then separate into layers, the upper layer is for secondary treatment liquid, the lower layer is a viscous black liquid enriched with quinoline insolubles, this liquid can be used as a raw material in other fields, such as the production of binders;

[0020] (4) Distill the propylene glycol from the secondary treatment liquid at 190-200°C, distill the washing oil at 280-300°C, recycle the propylene glycol and washing o...

Embodiment 3

[0022] (1) Mix 100g polyaluminum chloride, 1500g deionized water, and 10000g propylene glycol at room temperature, and stir for 2 hours to obtain a flocculation solution;

[0023] (2) Add 2500g of washing oil to 1000g of asphalt to be treated, raise the temperature to 95°C and stir at constant temperature for 1.5h to obtain the asphalt / washing oil mixture;

[0024] (3) Add 500g of flocculation solution to the above asphalt / washing oil mixture, stir at 105°C for 0.5h to obtain a primary treatment solution, centrifuge the treatment solution at a speed of 1500r / min for 15min and then separate into layers, the upper layer is for secondary treatment liquid, the lower layer is a viscous black liquid enriched with quinoline insolubles, this liquid can be used as a raw material in other fields, such as the production of binders;

[0025] (4) Distill the propylene glycol from the secondary treatment liquid at 190-200°C, distill the washing oil at 280-300°C, recycle the propylene glycol...

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PUM

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Abstract

The invention discloses a low-energy-consumption removal method of quinoline insolubles in asphalt and belongs to the technical field of removal of quinoline insolubles in the asphalt. The low-energy-consumption removal method comprises the following steps of: preparing a flocculant solution containing ethylene glycol or propylene glycol, water and aluminium polychlorid, and an asphalt / gas absorber oil mixture solution, mixing the flocculant solution and the asphalt / gas absorber oil mixture solution, then carrying out centrifugal separation to extract a supernatant, and distilling the ethylene glycol, the propylene glycol and gas absorber oil from the supernatant to obtain refined asphalt. The low-energy-consumption removal method has the advantages and effects that: as a flocculating mechanism is adopted, the technological time spent in the process of removing the quinoline insolubles in the asphalt is saved in comparison with the traditional solvent sedimentation method, and therefore the energy consumption is reduced. The mass content of the quinoline insolubles in the refined asphalt treated by using the method is 0.3-0.6 percent.

Description

technical field [0001] The invention relates to a method for removing quinoline insoluble matter in asphalt with low energy consumption, and belongs to the technical field of removing quinoline insoluble matter in asphalt. Background technique [0002] The quinoline insoluble matter in asphalt is a carbonaceous particle of about 1 μm. If its mass content in asphalt exceeds 1%, the quality of mesophase pitch and needle coke produced using asphalt as raw material will be greatly reduced. , Therefore, when producing related products, it is required to remove the quinoline insoluble matter in asphalt to reduce its mass content to below 0.8%. At present, the more mature method in the industry is to use a single-solvent or double-solvent mixed sedimentation method. This method has an excellent removal effect, but requires a long settling time (generally 5~24h). Since the settling process requires heat preservation operation, it needs to be provided by the outside world. Energy, l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C3/00C10C3/06C10C3/08
Inventor 王成杨孙帅陈明鸣
Owner TIANJIN UNIV