Microemulsion detergent for resource treatment of oil-containing solid waste, and preparation method and application thereof

A solid waste and microemulsion technology, applied in the field of oil-contaminated soil remediation, can solve problems such as waste of oil resources and environmental pollution

Inactive Publication Date: 2016-01-13
INST OF SOIL SCI CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Technical problem solved: Aiming at the environmental pollution caused by oily solid waste and the waste of oil resources, the present invention provides a microemulsion for recycling oily solid waste Lotion and its preparation method and application

Method used

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  • Microemulsion detergent for resource treatment of oil-containing solid waste, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The sample used in this example is oily mud sand with an oil content of 17.00wt.% and a water content of 4.90wt.%. Weigh 20g of oil-containing mud sand, add the same amount of prepared microemulsion lotion of the present invention to process, the prepared fatty alcohol polyoxyethylene ether sodium sulfate solution (70%) 5.71wt.%, butyl lactate 4wt.% , amyl propionate 1wt.%, sodium chloride 0.5wt.%, and the balance is water. After stirring and mixing, the three phases were separated after centrifugation and the residual oil rate of the lower solid phase was measured to be 1.14wt.%.

Embodiment 2

[0024] The sample used in this example is crude oil polluted soil aged for half a year, with an oil content of 26.45wt.% and a moisture content of 5.35wt.%. Weigh 20g of oily sludge, add an equivalent amount of microemulsion lotion of the present invention for processing, prepared fatty alcohol polyoxyethylene ether sodium sulfate solution (70%) 5.71wt.%, butyl lactate 4wt. %, amyl propionate 1wt.%, sodium chloride 0.9wt.%, and the balance is water. After stirring and mixing, the three phases are separated after centrifugation and standing, but the boundary is not obvious, the middle liquid phase is turbid, and the lower layer is measured The residual oil rate of the solid phase was 4.30wt.%.

Embodiment 3

[0026] The sample used in this example is soil polluted by crude oil for three months, with an oil content of 20.01 wt.%, and a water content of 1.53 wt.%. Weigh 20g of oily sludge, add 40g of the prepared microemulsion lotion of the present invention for treatment, prepared fatty alcohol polyoxyethylene ether sodium sulfate solution (70%) 2.86wt.%, butyl lactate 4wt.% , amyl propionate 0.6wt.%, sodium chloride 0.3wt.%, and the balance is water. After stirring and mixing, the three phases were separated after centrifuging and standing still. The residual oil rate of the lower solid phase was measured to be 2.03wt.%, oil phase, liquid phase and solid phase. Recyclable, the middle liquid phase is clear and transparent, then the microemulsion phase can continue to be recycled to process oil sludge, and the solid phase becomes soil with low oil content after dehydration, which is convenient for further processing.

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Abstract

A microemulsion detergent for resource treatment of oil-containing solid waste, and a preparation method and an application thereof are provided. The microemulsion detergent comprises the components by the mass percentage: 1.2%-4.0% of fatty alcohol polyoxyethylene ether sulfate, 2.0%-4.0% of butyl lactate, 0.5%-1.0% of amyl propionate, 0.3%-0.9% of sodium chloride, and 91.1%-96% of water. The microemulsion detergent can be mixed with the oil-containing solid waste at room temperature, can complete repair treatment and can recycle oil resources with high efficiency; cheap and easily accessible NaCl is used as an electrolyte, other components have less amount, treatment operation is simple, three-phase separation is facilitated, and subsequent treatment of sludge is facilitated; and an intermediate liquid phase namely a microemulsion phase can also continue to be recycled, so that the cost is lower.

Description

technical field [0001] The invention belongs to the field of remediation of oil-contaminated soil in environmental engineering, and in particular relates to a microemulsion lotion for recycling oil-containing solid waste, a preparation method and application thereof. Background technique [0002] In the petroleum and petrochemical industry, a large amount of oily solid waste, referred to as oil sludge, will be produced in the process of crude oil or refined oil extraction, transportation, refining, and oily sewage treatment, mainly including landing sludge, drilling mud, tank bottom sludge in oil refineries, and grease trap bottom Sludge and residual activated sludge, etc. The annual output of oily sludge in my country has exceeded 5 million tons. Oil sludge contains a large number of toxic and harmful compounds, such as benzene, phenol and polycyclic aromatic hydrocarbons, most of which are teratogenic, carcinogenic and mutagenic, and are very harmful to human health. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C10G1/00B09C1/08
Inventor 刘五星刘晓艳骆永明
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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