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
CN112337134AInactive Publication Date: 2021-02-09HUBEI GUOCHUANG HI TECH MATERIAL +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUBEI GUOCHUANG HI TECH MATERIAL
Publication Date
2021-02-09
Estimated Expiration
Not applicable · inactive patent

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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.
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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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