Liquid-liquid separation method constructed by difference of plate type solid surface force field

A solid surface, differentiated technology, used in the separation of immiscible liquids, etc., can solve problems such as device blockage, and achieve the effect of increasing the separation area and increasing the separation effect.

Active Publication Date: 2017-11-17
WUHAN INSTITUTE OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process only uses the hydrophilic surface of the fiber to coalesce the water phase. In the actual application process, especially in the process of dehydration and desalination of crude oil, it is easy to cause blockage of the device.

Method used

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  • Liquid-liquid separation method constructed by difference of plate type solid surface force field

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Substrate A selects a copper plate, which is placed in NaOH and K 2 S 2 o 8 After soaking in the solution, a uniform needle-shaped copper hydroxide film is formed on the Cu surface, and then soaked with n-dodecanethiol ethanol solution to obtain a copper plate with superhydrophobicity and superlipophilicity. The contact angle between the copper plate and water is 151°.

[0031] Base material B is made of stainless steel, and its surface is coated with a thermosetting resin solution. After the solvent evaporates, silicon carbide powder is sprayed on the surface, heated and cured to form a silicon carbide hydrophilic and oleophobic surface coating.

[0032] According to the technical principle and scheme of this patent, the substrates A and B after surface modification are figure 1 Relatively arranged, the spacing is between 1 um and 1000 um, preferably 100 um, let the oil-water mixture pass between the substrates A and B, due to the difference in the surface force fie...

Embodiment 2

[0034] Substrate A selects a copper plate, etches it with a 4mol / L nitric acid solution for 4min, and then soaks it in cetyl mercaptan with a concentration of 1mmol / L for 1hr to make a superhydrophobic and superoleophilic copper mesh. The contact angle with water is kept above 150°.

[0035] Base material B is made of stainless steel, and its surface is coated with a thermosetting resin solution. After the solvent evaporates, silicon dioxide powder is sprayed on the surface, heated and cured to form a silicon dioxide hydrophilic and oleophobic surface coating.

[0036] According to the technical principle and scheme of this patent, the substrates A and B after surface modification are figure 1 Relatively arranged, the spacing is between 1um and 1000um, preferably 200um, and the oil-water mixture passes between the substrates A and B. Due to the difference in the surface force field between the surface of A and B for oil and water, different adhesion forces can be achieved. Oi...

Embodiment 3

[0038]Substrate A is made of stainless steel, and a layer of vertically arranged carbon nanotubes is deposited on the stainless steel by thermal chemical vapor deposition. Since the carbon nanotubes themselves are hydrophobic, they have superhydrophobicity.

[0039] Base material B is ABS resin, sprayed on its surface with polyvinylpyrrolidone solution to form a hydrophilic and oleophobic surface coating.

[0040] According to the technical principle and scheme of this patent, the substrates A and B after surface modification are figure 1 Relatively arranged, the spacing is between 1um and 1000um, preferably 500um, and the oil-water mixture passes between the substrates A and B. Due to the difference in the surface force field between the surface of A and B for oil and water, different adhesion forces are generated, which can be realized. Oil and water separation.

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Abstract

The invention discloses a liquid-liquid separation method constructed by difference of a plate type solid surface force field. The method comprises the following steps: a to-be-separated oil-water mixed liquid flows through a gap between a panel A and a panel B, wherein the surfaces of the panel A and the panel B separately have hydrophilic and hydrophobic properties and hydrophilic and oleophobic properties; and different adhesive forces are generated by means of the difference of surface force field of the surfaces of the panel A and the panel B on the oil-water mixed liquid and the through liquid is collected and left to stand to separate oil and water. The separation method disclosed by the invention not only comprises coalescent and separation processes of a diffused phase, but also comprises coalescent and separation processes of a continuous phase, so that the separating time is shortened, and the separating effect is improved. The method has a good effect in oil-water separation process, demulsifying process and extraction process.

Description

technical field [0001] The invention specifically relates to a liquid-liquid separation method constructed by plate-type solid surface force field differences. Background technique [0002] All kinds of physical and chemical changes in the process of material preparation and use are gradually carried out from the surface of the material to the inside of the material, and the progress of these processes depends on the surface structure and properties of the material. The volume of various materials that people usually encounter and use is limited, that is, the surface of the material is always exposed to the medium in contact with it. A series of physical and chemical reactions occur on the contacting interface more or less quickly. The root cause of the surface phenomenon is that the particle arrangement on the surface of the material is different from that inside the material, and the surface of the material is in a high-energy state. [0003] The interface of a solid can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D17/02
CPCB01D17/02
Inventor 袁军陈钱马晓梦程健张富青
Owner WUHAN INSTITUTE OF TECHNOLOGY
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