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Method for performing ultrasonic separation on oily wastewater with oil-soluble ferroferric oxide nanoparticles

A technology of ferroferric oxide and nanoparticles, which is applied in the intersecting field of environment and materials, and can solve the problem that the treatment method is not very effective

Inactive Publication Date: 2012-03-28
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for ultrasonically separating oily sewage by oil-soluble iron ferric oxide nanoparticles

Method used

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  • Method for performing ultrasonic separation on oily wastewater with oil-soluble ferroferric oxide nanoparticles
  • Method for performing ultrasonic separation on oily wastewater with oil-soluble ferroferric oxide nanoparticles
  • Method for performing ultrasonic separation on oily wastewater with oil-soluble ferroferric oxide nanoparticles

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] a. 20ml of oilfield wastewater is subjected to ultrasonic water-bath continuous ultrasonication;

[0019] b. Add oil-soluble iron ferric oxide nanoparticles modified by oleic acid while ultrasonicating the oil field wastewater, and disperse by ultrasonic for 5 minutes. 0.1ml;

[0020] c. Perform the magnetic separation of the permanent magnet on the ultrasonic solution in step b, and scan the solution with an ultraviolet spectrophotometer. Due to the existence of micro-oil droplets, the oil field sewage has a scattering effect on visible light, so it is turbid and shows a high visible light absorption phenomenon. ( figure 2 ), especially in the ultraviolet region, because olefins will absorb here, so the ultraviolet light with a wavelength of less than 300 nanometers shows a strong absorption, and the water sample separated by ultrasonic oil-soluble ferric oxide nanoparticles no matter in the visible light The absorption range and the ultraviolet region are significa...

Embodiment 2

[0023] a, 20ml of natural gas field waste water is subjected to ultrasonic probe type intermittent ultrasonic;

[0024] b. Add oil-soluble iron ferric oxide nanoparticles modified by linoleic acid while supersonicating natural gas field wastewater, and ultrasonically disperse for 10 minutes, wherein the amount of oil-soluble iron ferric oxide nanoparticles modified by linoleic acid is per liter of oil Add 0.5ml to the waste water;

[0025] c. Perform magnetic separation of the solution after ultrasonication in step b, and scan the solution with an ultraviolet spectrophotometer. Due to the presence of micro-oil droplets, the sewage has a scattering effect on visible light, so it is turbid and shows a higher visible light absorption phenomenon. However, the water samples separated by ultrasonic oil-soluble ferric oxide nanoparticles have significantly reduced absorption in the visible light range and ultraviolet region, which can achieve the removal of micro-oil droplets in oily...

Embodiment 3

[0027] a, 20ml of mechanically processed oily waste water is subjected to ultrasonic water bath type pulse ultrasonic;

[0028] b. Add lauric acid-modified oil-soluble iron ferric oxide nanoparticles while ultrasonically processing oily wastewater, and ultrasonically disperse them for 30 minutes, wherein the amount of oil-soluble iron ferric oxide nanoparticles modified by lauric acid is per liter of oily wastewater Add 1ml to it;

[0029] c. Perform magnetic separation of permanent magnets on the solution after ultrasonication in step b, and scan the solution with an ultraviolet spectrophotometer. Due to the existence of micro-oil droplets, the sewage has a scattering effect on visible light, so it is turbid and shows a higher visible light absorption phenomenon. However, the absorption of water samples separated by ultrasonic oil-soluble ferric oxide nanoparticles is significantly reduced in both the visible light range and the ultraviolet region, which can achieve the remov...

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Abstract

The invention relates to a method for performing ultrasonic separation on oily wastewater with oil-soluble ferroferric oxide nanoparticles. The method comprises the following steps: performing ultrasonic treatment on oily wastewater while adding oil-soluble ferroferric oxide nanoparticles in the oily wastewater, performing ultrasonic dispersion to ensure that ferroferric oxide enters the microdroplets of the wastewater with the help of the hydrophobic alkyl surface and magnetic oil microdroplets with ferroferric oxide particles are formed, and then combining magnetic separation to achieve the aim of removing the oil microdroplets in the wastewater. The method can be applied to treat the oily wastewater, improve the human living environment and increase the life quality of people. The oily wastewater treated by the method, particularly the oil extraction wastewater in the oilfield has a remarkable oil-water separation effect.

Description

technical field [0001] The invention belongs to the intersecting field of environment and materials, and relates to a method for ultrasonically separating oily sewage by oil-soluble iron ferric oxide nanoparticles, which is used to separate emulsified oil and other forms of micro-oil droplets in oily sewage. Background technique [0002] There are three main sources of oilfield wastewater. One is the wastewater that is separated and transferred from oil well production fluid after degassing and dehydration treatment, that is, oil production wastewater; the second is salt washing wastewater; the third is well washing water. The main pollutant is crude oil. At present, most oilfields in China have entered the mid-to-late stage of production, mainly relying on technologies such as water injection, surfactant injection, and polymer injection to displace crude oil in the formation. These measures have produced a large amount of produced water that is difficult to treat. The wate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/40C02F1/36
Inventor 李守柱王传义贾汉忠
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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