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Preparation method of wetting selective oil-water separation membrane separated according to requirements

An oil-water separation membrane and selective technology, applied in semi-permeable membrane separation, chemical instruments and methods, membranes, etc., can solve the problems of complex preparation steps, non-corrosion resistance, high cost, and achieve simple preparation process, low cost and pollution. small effect

Active Publication Date: 2018-11-20
JIANGSU SAFELY ENVIRONMENT ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, macromolecules or macromolecular organics play a very important role in the preparation of Jenus membranes and intelligent responsive membranes. Therefore, their cost is relatively high, they are not corrosion-resistant, the preparation steps are complicated, and the surface is relatively flat and difficult to Rough structures are formed on the surface of the membrane

Method used

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  • Preparation method of wetting selective oil-water separation membrane separated according to requirements

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Effect test

Embodiment 1

[0026] A method for preparing a wetting selective oil-water separation membrane separated on demand, the specific preparation steps are as follows:

[0027] a) Dissolve the aluminum chloride of 0.001mol and the ammonium chloride of 0.005mol in 100mL deionized water, fully stir it and make it mix uniformly, obtain the aluminum chloride / ammonium chloride mixed solution;

[0028] b) Add 9 square centimeters of glass fiber cloth and 90 mL of aluminum chloride / ammonium chloride mixed solution into the autoclave in turn, react at 200 ° C for 16 hours, take it out and wash it with deionized water 4 times, and put it in Vacuum drying at 40°C for 8 hours to obtain a precursor separation membrane material with a hierarchical structure;

[0029] c) Place the precursor separation membrane with hierarchical structure obtained above in a tube furnace, and calcinate at 500°C for 6 hours under the protection of nitrogen to obtain a superhydrophilic / underwater superoleophobic separation membra...

Embodiment 2

[0035]A method for preparing a wetting selective oil-water separation membrane separated on demand, the specific preparation steps are as follows:

[0036] a) Dissolve 0.005 mol of sodium metaaluminate and 0.02 mol of urea in 100 mL of deionized water, stir well to make it evenly mixed, and obtain a sodium metaaluminate / urea mixed solution;

[0037] b) Add 9 square centimeters of glass fiber cloth and 90 mL of sodium metaaluminate / urea mixed solution into the autoclave in turn, react at 180°C for 16 hours, take it out, wash it twice with deionized water, and put it at 50 Vacuum drying at ℃ for 7 hours to obtain a precursor separation membrane material with a hierarchical structure;

[0038] c) Place the precursor separation membrane with hierarchical structure obtained above in a tube furnace, and calcinate at 500°C for 6 hours under the protection of nitrogen to obtain a superhydrophilic / underwater superoleophobic separation membrane with hierarchical structure;

[0039] d) ...

Embodiment 3

[0044] A method for preparing a wetting selective oil-water separation membrane separated on demand, the specific preparation steps are as follows:

[0045] a) Dissolve 0.01 mol of sodium metaaluminate and 0.04 mol of urea in 100 mL of deionized water, stir well to make it evenly mixed, and obtain a sodium metaaluminate / urea mixed solution;

[0046] b) Add 9 square centimeters of carbon fiber membrane and 90 mL of sodium metaaluminate / urea mixed solution into the autoclave in turn, react at 160 °C for 18 h, take it out, wash it with deionized water 4 times, and heat it at 60 °C Under vacuum drying for 6h, the precursor separation membrane material with hierarchical structure is obtained;

[0047] c) Place the precursor separation membrane with hierarchical structure obtained above in a tube furnace, and calcinate at 600°C for 4 hours under the protection of nitrogen to obtain a superhydrophilic / underwater superoleophobic aluminum oxide nanosheet coating with a hierarchical str...

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Abstract

The invention belongs to the technical field of chemical separation and relates to a preparation method of a wetting selective oil-water separation membrane separated according to requirements. The preparation method comprises the following steps: firstly, mixing an aluminate precursor and a pH regulator to form a solution, adding 8 to 12 ml of aluminum ion pH regulator mixed solution according toa porous basement membrane per square centimeter, carrying out hydrothermal reaction at the temperature of 150 to 200 DEG C for 12 to 24 hours, taking out a reactant, washing and carrying out vacuumdrying to obtain a precursor separation membrane with a hierarchical structure; carrying out high-temperature calcining to obtain a superhydrophilic / underwater super-oleophobic separation membrane with a hierarchical structure; then adding the superhydrophilic / underwater super-oleophobic separation membrane into a sodium laurate solution and carrying out modification reaction at the temperature of40 to 70 DEG C for 5 to 9 hours, and carrying out high-temperature calcining to obtain the superhydrophilic / underwater super-oleophobic separation membrane with the hierarchical structure; and carrying out repeated calcining and surface modification to obtain the wetting selective membrane according to the requirements. The preparation method disclosed by the invention has the advantages of simple process and low cost, solves the problems of poor selectivity, high possibility of pollution, low separation efficiency and the like of a traditional oil-water separation membrane are solved by utilizing surface superhydrophilic and super-hydrophobic characteristics under different conditions, and has a great application value in the fields of environment friendliness, chemical engineering and the like.

Description

technical field [0001] The invention belongs to the technical field of chemical separation, and relates to an oil-water separation membrane, in particular to a preparation method of a wetting-selective oil-water separation membrane separated on demand. Background technique [0002] With the advancement of industrialization, in the production, transportation, storage and application of crude oil, frequent oil spill accidents will cause serious environmental and ecological problems; in addition, more and more industrial oily wastewater and water-insoluble The leakage of organic solvents also poses a threat to the natural environment and human health. Therefore, the effective separation of oil-water mixture is one of the urgent problems to be solved. Due to the variety of oil-water mixtures, from the perspectives of preparation process, separation efficiency, cost-effectiveness and industrialization requirements, it is very important to develop an oil-water separation material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/02B01D61/40
CPCB01D61/40B01D67/0039B01D67/0041B01D67/0044B01D69/02B01D2325/38
Inventor 邱凤仙李张迪张涛岳学杰魏庚尧徐吉成
Owner JIANGSU SAFELY ENVIRONMENT ENG
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