Method for carrying out oil-water separation on micro-emulsion by utilizing magnetic field
A technology of oil-water separation and microemulsion, which is applied in separation methods, liquid separation, immiscible liquid separation, etc., and can solve problems such as large demand and inability to recycle
Inactive Publication Date: 2016-08-03
ZHEJIANG OCEAN UNIV
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Problems solved by technology
However, in terms of thermodynamics and dispersed particle analysis of microemulsions, the use of surfactants for demulsification is too high in demand and cannot be recycled
Method used
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Experimental program
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Effect test
Embodiment 1
[0055] Sample: colored and transparent Tuha oilfield wastewater, COD value: 425mg / mL.
[0056] After demulsification by the above method, the COD value dropped to 74.6mg / mL.
Embodiment 2
[0058] Sample: Colorless and transparent banknote printing and papermaking wastewater, COD value: 342mg / mL.
[0059] After demulsification by the above method, the COD value dropped to 72.9mg / mL.
Embodiment 3
[0061] Sample: Colorless and transparent deinking papermaking wastewater, 166mg / mL.
[0062] After demulsification by the above method, the COD value dropped to 75.8mg / mL.
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The invention discloses a method for carrying out oil-water separation on micro-emulsion by utilizing a magnetic field. The method comprises the following steps: adding a magnetic demulsifying agent Fe3O4-EC into the micro-emulsion and uniformly stirring; and controlling the temperature of the micro-emulsion to be 250 DEG C and carrying out settling separation on the micro-emulsion under the action of the magnetic field. The novel magnetic demulsifying agent is utilized and the demulsifying agent has suitable lipophilic and hydrophilic properties, so that the demulsifying agent has superparamagnetism; the demulsifying agent can be dispersed into the micro-emulsion without the additional magnetic field; and under the action of the magnetic field, the demulsifying agent and adsorbed water and inorganic matters can be rapidly settled to the bottom, so that oil-water separation is realized. After the magnetic demulsifying agent at the bottom is collected, the magnetic demulsifying agent can be alternatively washed with light oil and ethanol to be regenerated under the action of the magnetic field.
Description
technical field [0001] The invention relates to a microemulsion demulsification method, which belongs to the field of colloid chemistry. Background technique [0002] If two or more immiscible liquids are mixed and emulsified, and the diameter of the dispersed droplets is between 5nm and 100nm, the system is called a microemulsion. Microemulsion is a transparent dispersion system, and its formation is related to the solubilization of micelles, also known as "swollen micellar solution" or "micelle emulsion". Referred to as microemulsion. The particles of the dispersed phase are smaller than 0.1 μm, even as small as tens of angstroms. Its characteristic is that the particle size of the dispersed phase is between 0.01 and 0.1 μm, the size of the particle is uniform, and it is invisible under the microscope; the particle is spherical; the microemulsion is translucent to transparent, and the thermodynamics are stable. If the system is transparent, the fluidity is good. It can ...
Claims
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IPC IPC(8): B01D17/05
CPCB01D17/0208B01D17/047
Inventor 陈英陈东王敏王玉华陈勇王路辉
Owner ZHEJIANG OCEAN UNIV