Gradient extraction method for oil-stone separation of waste asphalt mixture

A waste asphalt and mixture technology, which is applied in the preparation of liquid hydrocarbon mixture, solid solvent extraction, petroleum industry, etc., can solve the problems of large demand for extractant, low concentration of asphalt, and no economic significance, so as to achieve green development, Reduce solvent loss and reduce the effect of low amount of mixed solvent

Inactive Publication Date: 2021-02-09
HUBEI GUOCHUANG HI TECH MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the traditional extraction process to extract asphalt in waste asphalt mixture, there are problems such as large demand for extractant and low concentration of asphalt in the extract, which makes solvent extraction of waste asphalt economically meaningless.

Method used

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  • Gradient extraction method for oil-stone separation of waste asphalt mixture
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  • Gradient extraction method for oil-stone separation of waste asphalt mixture

Examples

Experimental program
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Effect test

Embodiment 1

[0052] A gradient extraction method for separating waste and old asphalt mixture oil stones, comprising the steps of:

[0053] (1) Collect the waste asphalt mixture, and spray and clean the collected waste asphalt mixture with 3 times the standard atmospheric pressure high-pressure water mist for 2 hours, then drain the cleaned waste asphalt mixture and dry it at 90°C Dehydration, crushing and sieving the dried waste asphalt mixture to obtain the waste asphalt mixture particles after the fine powder is released;

[0054] (2) Continuous gradient extraction of waste asphalt mixture particles through a composite solvent, the composite solvent includes the following components: 81.3% toluene, 9.2% turpentine, 3.6% tea seed oil and 5.9% No. 100 mineral spirits. Fill the dried waste asphalt mixture particles into the E with a volume of 600L 1 ,E 2 ,E 3 ,E 4 After the oilstone extraction tower, start the continuous gradient extraction, the steps are as follows:

[0055] 2.1) For...

Embodiment 2

[0071] A gradient extraction method for separating waste and old asphalt mixture oil stones, comprising the steps of:

[0072] (1) Collect the waste asphalt mixture, and spray and clean the collected waste asphalt mixture with high-pressure water mist at twice the standard atmospheric pressure for 3 hours, then drain the cleaned waste asphalt mixture and dry it at 80°C Dehydration, crushing and sieving the dried waste asphalt mixture to obtain the waste asphalt mixture particles after the fine powder is released;

[0073] (2) Continuous gradient extraction of waste asphalt mixture particles through a composite solvent, the composite solvent includes the following components: 67.8% toluene, 15.4% turpentine, 7.5% tea seed oil and 9.3% No. 100 mineral spirits. Fill the dried waste asphalt mixture particles into the E with a volume of 600L 1 ,E 2 ,E 3 ,E 4 After the oilstone extraction tower, start the continuous gradient extraction.

[0074] The difference from Example 1 is...

Embodiment 3

[0081] A gradient extraction method for separating waste and old asphalt mixture oil stones, comprising the steps of:

[0082] (1) Collect the waste asphalt mixture, and spray and wash the collected waste asphalt mixture with 4 times the standard atmospheric pressure high-pressure water mist for 1 hour, then drain the cleaned waste asphalt mixture and dry it at 95°C Dehydration, crushing and sieving the dried waste asphalt mixture to obtain the waste asphalt mixture particles after the fine powder is released;

[0083] (2) Continuous gradient extraction of waste asphalt mixture particles through a composite solvent, the composite solvent includes the following components: 73.1% toluene, 12.2% turpentine, 5.6% tea seed oil and 9.1% No. 100 mineral spirits. Fill the dried waste asphalt mixture particles into the E with a volume of 600L 1 ,E 2 ,E 3 ,E 4 After the oilstone extraction tower, start the continuous gradient extraction.

[0084] The difference from Example 1 is th...

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Abstract

The invention discloses a gradient extraction method for oil-stone separation of a waste asphalt mixture. The gradient extraction method specifically comprises the step of carrying out continuous gradient extraction on the waste asphalt mixture by using a composite solvent, wherein the composite solvent comprises 67.8-81.3% of toluene, 9.2-15.4% of turpentine and 3.6-7.5% of tea seed oil, with thebalance being No. 100 solvent oil; and the continuous gradient extraction comprises the processes of soaking, solvent replacement, steam elution and the like. According to the invention, asphalt andstone can be fully separated, the extraction rate of asphalt is high, performance is excellent, the residual asphalt quantity in a separated sandstone material is very low, and the sandstone materialcan be directly reused for paving roads; and an extraction agent can be repeatedly recycled, so cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of waste and old asphalt mixture regeneration, and in particular relates to a gradient extraction method for separating waste and old asphalt mixture from asphalt. Background technique [0002] With the improvement of the expressway network in our country, the maintenance and reconstruction of the road surface gradually occupy a dominant position. During the maintenance and renovation of asphalt pavement, a large amount of waste asphalt mixture will be produced. The stone and asphalt contained in it are precious non-renewable resources. If they are discarded, it will be a great waste of resources. At present, the regeneration technology of separating the stone and asphalt in the waste asphalt mixture has been gradually paid attention to. The obtained asphalt-free stone can prepare qualified new asphalt mixture, and the regenerated asphalt can meet the requirements of qualified road asphalt after moderate mod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D11/02C10G1/04
CPCB01D11/02C10G1/00C10G2300/1003
Inventor 涂娟万路郝水平田林乐张吉敏张树领袁军程建
Owner HUBEI GUOCHUANG HI TECH MATERIAL
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