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Method for achieving water-passing oil-blocking type oil-water separation by using super-double-hydrophobic or double-hydrophobic net membrane

A technology for oil-water separation and dredging membrane, which is applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of difficult preparation, difficulty in realizing oil-water separation through oil-blocking and water-passing, and blocking mesh holes by filtration. Achieve the effect of low cost and energy consumption, greatly reduced overcoming efficiency and improved separation efficiency

Active Publication Date: 2019-04-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problem that the existing filtration method is easy to be blocked by oil and the super-oleophobic super-hydrophilic or oleophobic-hydrophilic materials are difficult to prepare, making it difficult to realize the oil-blocking and water-flowing oil-water separation. A method for oil-repelling and water-passing oil-water separation using superamphiphobic or amphiphobic omentum

Method used

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  • Method for achieving water-passing oil-blocking type oil-water separation by using super-double-hydrophobic or double-hydrophobic net membrane
  • Method for achieving water-passing oil-blocking type oil-water separation by using super-double-hydrophobic or double-hydrophobic net membrane

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specific Embodiment approach 1

[0021] Specific implementation mode 1: The specific process of the method for realizing oil-blocking and water-flowing oil-water separation using super-amphiphobic or amphiphobic omentum in this embodiment is as follows:

[0022] Step 1: making a water-soluble liquid with low surface energy wet a part or the whole of the superamphiphobic or amphiphobic omentum by means of spraying or soaking;

[0023] Super-amphiphobic means that the contact angles of oil and water with solid surfaces are greater than 155 degrees;

[0024] Amphiphobic means that the contact angles of oil and water with solid surfaces are both greater than 90 degrees and less than or equal to 155 degrees;

[0025] The specific amount of low surface energy is actually related to the oleophobicity of the super-amphiphobic or amphobic surface, which is low enough to wet the super-amphiphobic or amphobic surface. For example, it is generally used that the surface energy at room temperature is less than 0.03N / m as ...

specific Embodiment approach 2

[0030] Embodiment 2: This embodiment differs from Embodiment 1 in that the water-soluble liquid with low surface energy in step 1 is ethanol, methanol, acetone, tetrahydrofuran, or an aqueous solution containing a surfactant.

[0031] Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0032] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in the step 1, the super-amphiphobic omentum behaves as super-hydrophobic and super-oleophobic in the air, so that neither oil nor water can pass through the network. membrane.

[0033] Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a method for achieving water-passing oil-blocking type oil-water separation by using a super-double-hydrophobic or double-hydrophobic net membrane, and relates to a water-passing oil-blocking type oil-water separation method. The purpose is to solve the problems that the existing filtration method is blocked easily by oil and the super-oleophobic super-hydrophilic or oleophobic hydrophilic material is prepared difficultly, so that the oil-blocking water-passing type oil-water separation is achieved difficultly. The method comprises the following steps: 1, a water-soluble liquid with low surface energy is enabled to wet a super-double-hydrophobic or double-hydrophobic net membrane by using a spraying or soaking mode; 2, the obtained super-double-hydrophobic or double-hydrophobic net membrane which is wetted by the water-soluble liquid with low surface energy is soaked in water, so that the super-double-hydrophobic or double-hydrophobic net membrane is wetted bywater; 3, when the oil-water mixture is driven by gravity or pressure to contact the two water-wetted net membranes, the water in the oil-water mixture freely passes through the super-double-hydrophobic or double-hydrophobic net films, and the oil cannot pass through the super-double-hydrophobic or double-hydrophobic net membranes, so that the oil-blocking water-passing type oil-water separation is achieved. The method is used in the technical field of oil-water separation.

Description

technical field [0001] The invention relates to a method for oil-water separation of a water-passing and oil-blocking type. Background technique [0002] Efficient and economical oil-water separation technology has important application value in many fields. The cost of crude oil extraction in China far exceeds the world average level. Advanced oil-water separation technology can significantly reduce excessive energy consumption in the process of oil extraction, thereby improving related energy and cost issues; offshore oil pollution poses a major threat to human production and life. Advanced oil-water separation technology will be beneficial to the improvement of marine ecology; similarly, oil-water separation in industrial and domestic sewage treatment is also a common problem faced by all countries. Advanced treatment methods can control pollution, reduce costs, and promote resource recycling. China, etc. This is important for countries with fewer resources per capita. ...

Claims

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Application Information

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IPC IPC(8): B01D17/022C02F1/44
CPCB01D17/02C02F1/44
Inventor 潘昀路赵学增
Owner HARBIN INST OF TECH
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