Preparation method of underwater ultraoleophobic and under-oil ultrahydrophobic membrane, and method of continuously separating light-oil/water/heavy-oil mixture therewith

A technology for underwater super-oleophobic and heavy oil mixtures, which is applied in semi-permeable membrane separation, chemical instruments and methods, and liquid separation. It can solve the problems of poor chemical stability, expensive preparation costs, and unfavorable industrial production. Raw materials are easily available and the production cycle is short

Active Publication Date: 2017-08-29
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem that existing membrane products cannot continuously separate the three-phase mixture of light oil/water/heavy oil through gravity with a single membrane, and at the same time, the preparation cost is expensive, the process i...

Method used

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  • Preparation method of underwater ultraoleophobic and under-oil ultrahydrophobic membrane, and method of continuously separating light-oil/water/heavy-oil mixture therewith
  • Preparation method of underwater ultraoleophobic and under-oil ultrahydrophobic membrane, and method of continuously separating light-oil/water/heavy-oil mixture therewith
  • Preparation method of underwater ultraoleophobic and under-oil ultrahydrophobic membrane, and method of continuously separating light-oil/water/heavy-oil mixture therewith

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specific Embodiment approach 1

[0049] Specific embodiment one: the preparation method of a kind of underwater super oleophobic and oil super hydrophobic film described in this embodiment is carried out according to the following steps:

[0050] 1. Preparation of mesh substrate:

[0051] Select a mesh filter base, the mesh number of the mesh filter base is not more than 800 mesh;

[0052] 2. Preparation of coating dispersion:

[0053] Mix biomass powder, water-based polyurethane and absolute ethanol to obtain a coating dispersion;

[0054] The mass ratio of the biomass powder to absolute ethanol is (0.001~1):1; the mass ratio of the water-based polyurethane to absolute ethanol is (0.0001~100):1;

[0055] 3. Spraying:

[0056] The spraying amount is (0.1~100)g / cm 3 Under certain conditions, the coating dispersion is evenly sprayed on the mesh filter substrate to obtain underwater super-oleophobic and sub-oil super-hydrophobic films.

[0057] The beneficial effects of this embodiment are: 1. The method of...

specific Embodiment approach 2

[0062] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the mesh filter base described in step 1 is nylon mesh, steel mesh, copper mesh, cotton cloth or non-woven fabric. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0063] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the biomass powder described in step two is straw powder, starch, corn flour or microalgae powder; the biomass powder described in step two The mesh number of the substance powder is 200 mesh to 800 mesh. Others are the same as in the first or second embodiment.

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Abstract

A preparation method of an underwater ultraoleophobic and under-oil ultrahydrophobic membrane and a method of continuously separating a light-oil/water/heavy-oil mixture therewith. The invention relates to a preparation method of oil-water separation membrane and is direct at solving the problems that a membrane product in the prior art cannot be used for continuously separating a light-oil/water/heavy-oil three-phase mixture by single membrane through gravity, is high in preparation cost, has complex process, has disadvantage on industrial production and has poor chemical stability. The preparation method includes the steps of: 1) preparing a net-shaped base material; 2) preparing a coating dispersion liquid; and 3) performing spray coating. The method of separating the light-oil/water/heavy-oil mixture includes the steps of: 1) pre-wetting; and 2) continuous separation of the light-oil/water/heavy-oil mixture. The invention provides the preparation method of the underwater ultraoleophobic and under-oil ultrahydrophobic membrane and the method of continuously separating the light-oil/water/heavy-oil mixture therewith.

Description

technical field [0001] The invention relates to a preparation method of an oil-water separation membrane. Background technique [0002] Due to the ever-expanding industrial oily wastewater and the ever-increasing crude oil spills, oil-water separation has become a worldwide problem. However, traditional oil-water separation membranes can only simply separate water or oil, and at the same time, due to the possibility of interception of components that cannot be separated during separation, the separation flux continues to decrease. For example, when a simple superhydrophobic / superoleophilic membrane uses gravity to separate light oil and water mixture, it will prevent the membrane from separating light oil because water is denser than oil. When the pure superhydrophilic / underwater superoleophobic membrane uses gravity to separate / water-heavy oil mixture, it will prevent the separation of water by the membrane because the density of heavy oil is higher than that of water. At...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/12B01D17/022
CPCB01D17/0202B01D17/085B01D67/0088B01D69/12B01D2323/26B01D2325/30B01D2325/38
Inventor 王成毓曹国梁
Owner NORTHEAST FORESTRY UNIVERSITY
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