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Microemulsion for soil remediation, preparation method of microemulsion and remediation method of petroleum-contaminated soil

A technology for soil remediation and oil pollution, applied in the field of oil-contaminated soil remediation, can solve the problems of large amount of elution agent, poor elution efficiency, large residue, etc., and achieves simple and easy remediation method, high elution efficiency, and reduced viscosity. Effect

Active Publication Date: 2022-05-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems of large amount of eluting agents, large residues, and poor eluting efficiency for high-viscosity oil-contaminated soil in the remediation process, the present invention provides a microemulsion for soil remediation and a preparation method thereof

Method used

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  • Microemulsion for soil remediation, preparation method of microemulsion and remediation method of petroleum-contaminated soil
  • Microemulsion for soil remediation, preparation method of microemulsion and remediation method of petroleum-contaminated soil
  • Microemulsion for soil remediation, preparation method of microemulsion and remediation method of petroleum-contaminated soil

Examples

Experimental program
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Effect test

Embodiment 1

[0044]Get the sulfonate of 20g polyoxyethylene ether, the petroleum sulfonate of 20g and the water of 46.5g mix homogeneously, then it is mixed homogeneously with 10g methylcyclohexane, 1g alkyl naphthalene and 2.5g isopropanol, in After stirring at a speed of 400 rpm at room temperature, a transparent microemulsion was obtained.

[0045] The above-mentioned 15g microemulsion was mixed with 3g of oil-contaminated soil samples (oil content 8.2wt%, calculated as total petroleum hydrocarbons) in Shengli Oilfield, and after stirring for 0.5h at 50°C and 200 rpm, solid-liquid separation was carried out. Sample, the oil content of the separated soil sample is determined to be 1.9wt%, and the oil removal rate of the contaminated soil sample reaches 76.8%.

Embodiment 2

[0047] Get the phosphate of 25g polyoxyethylene oxypropylene ether, the lignosulfonate of 15g and the water of 46.5g mix evenly, then it is mixed with 10g methylcyclohexane, 1.5g polymethacrylate and 3g n-butanol Mix evenly, and obtain a transparent microemulsion after stirring at a speed of 400 rpm at room temperature.

[0048] The above-mentioned 9g microemulsion was mixed with 3g of oil-contaminated soil sample (oil content 8.2wt%, calculated as total petroleum hydrocarbons) in Shengli Oilfield, and after stirring for 0.5h at 50°C and 200 rpm, solid-liquid separation was carried out. Sample, the oil content of the separated soil sample is determined to be 2.2wt%, then its oil removal rate to the contaminated soil sample reaches 73.2%.

Embodiment 3

[0050] Get the sulfonate of 25g polyoxyethylene ether, the petroleum carboxylate of 20g and the water of 41.5g mix homogeneously, then it is mixed homogeneously with 10g cumene, 1g polymethacrylate and 2.5g isopropanol, in After stirring at a speed of 400 rpm at room temperature, a transparent microemulsion was obtained.

[0051] The above 21g microemulsion was mixed with 3g of the oil-contaminated soil sample (8.2wt% oil content, calculated as total petroleum hydrocarbons) at the Shengli Oilfield site, and after stirring for 0.5h at 70°C and 200 rpm, solid-liquid separation was carried out. Sample, the oil content of the separated soil sample is determined to be 1.5wt%, and then its oil removal rate to the polluted soil sample reaches 81.7%.

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Abstract

The invention discloses a microemulsion for soil remediation, a preparation method of the microemulsion and a remediation method of petroleum-contaminated soil. The microemulsion with thermodynamic stability is spontaneously formed by stirring a nonionic-anion and anion compounded surfactant, an oily component compounded by a solvent and an oil-soluble synergist, an alcohol phase and a water phase according to a certain proportion. The microemulsion is used for repairing the petroleum-contaminated soil, the method is simple and easy to implement, the requirement for equipment is low, energy consumption is low, the solubilizing effect of the microemulsion is good, the elution effect on the high-viscosity petroleum-contaminated soil is good, the residual amount of the microemulsion in the soil environment can be effectively reduced, and secondary pollution is small.

Description

technical field [0001] The invention belongs to the technical field of oil-contaminated soil remediation, and in particular relates to a microemulsion for soil remediation, a preparation method thereof and a method for remediating oil-contaminated soil. Background technique [0002] my country is a big country of oil production and consumption. Over the past few decades, the oil recovery technology of major oilfields was relatively backward and the airtightness was not good. Due to the lack of remediation technology, the degree of oil pollution in my country's oilfield soil is much higher than that in other developed countries, and the oil pollution in the soil is accumulating and aggravating year by year. At present, oil-contaminated soil has seriously affected the economic development and ecological environment of my country's oilfield areas. The remediation of oil-contaminated soil has become the focus of current environmental research in my country and one of the major en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/02C09K17/18
CPCB09C1/025C09K17/18
Inventor 秦冰任黎明巩赫赵锐孙钰林
Owner CHINA PETROLEUM & CHEM CORP
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