A kind of preparation method of oil-water separation membrane for strong acid, strong alkali and high salt environment

A technology of oil-water separation membrane and strong acid, applied in separation methods, liquid separation, semi-permeable membrane separation, etc., can solve the problems of complex preparation process, difficult operation, unusability, etc., achieve stable separation efficiency, easy control of experimental conditions, and synthesis The effect of simple process

Active Publication Date: 2017-05-03
BEIJING NATURE STONE SCI TECH DEVP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, oil-water separation materials with special wettability mainly include "oil-removing type" and "water-removing type". Although these materials have oil-water separation effects, they have obvious disadvantages, such as complicated preparation process and difficult operation. , the most important thing is that none of these materials can be used for oil-water separation in complex environments such as strong acid, strong alkali and high salt
The main reason is that these materials are modified on the surface of metal meshes such as iron and copper. These meshes are easy to react under strong acid and alkali, and basically cannot be used.
[0003] However, in actual oil-water separation, its complex oil-water environment, such as the high-salt environment of seawater and the complex acid-base environment in industrial wastewater, puts forward higher requirements on the stability of oil-water separation materials.

Method used

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  • A kind of preparation method of oil-water separation membrane for strong acid, strong alkali and high salt environment
  • A kind of preparation method of oil-water separation membrane for strong acid, strong alkali and high salt environment
  • A kind of preparation method of oil-water separation membrane for strong acid, strong alkali and high salt environment

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Experimental program
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Effect test

Embodiment 1

[0032] a) preparing a polyvinyl alcohol aqueous solution with a concentration of 4%, and adjusting its pH to 2;

[0033] b) Measure 10mL of polyvinyl alcohol aqueous solution, and soak the qualitative medium-speed filter paper in the aqueous solution of hydrophilic polymer for 30min;

[0034] c) introducing the soaked cellulose filter paper into a solution containing glutaraldehyde, and reacting for 12 hours at a temperature of 25°;

[0035] d) The cross-linked filter paper is repeatedly washed with ethanol and deionized water to remove unreacted cross-linking agent and water-soluble polymer, and finally the cross-linked filter paper is dried to constant weight to obtain special wettability Oil-water separation membrane.

[0036] e) Use such as figure 2 The shown oil-water separation device is used for oil-water separation, and the dried gel filter paper is placed between two glass vessels (such as figure 2 shown), gasoline and 8M concentrated sulfuric acid aqueous soluti...

Embodiment 2

[0038] a) preparing a polyvinyl alcohol aqueous solution with a concentration of 2%, and adjusting its pH to 4;

[0039] b) Measure 10mL of polyvinyl alcohol aqueous solution, and soak the qualitative medium-speed filter paper in the aqueous solution of hydrophilic polymer for 30min;

[0040] c) introducing the soaked cellulose filter paper into a solution containing glutaraldehyde, and reacting for 24 hours at a temperature of 40°;

[0041] d) The cross-linked filter paper is repeatedly washed with ethanol and deionized water to remove unreacted cross-linking agent and water-soluble polymer, and finally the cross-linked filter paper is dried to constant weight to obtain special wettability Oil-water separation membrane.

[0042] f) Use such as figure 2 The shown oil-water separation device is used for oil-water separation, and the dried gel filter paper is placed between two glass vessels (such as figure 2 shown), gasoline and 10M sodium hydroxide aqueous solution are mi...

Embodiment 3

[0044] a) preparing a polyvinyl alcohol aqueous solution with a concentration of 2%, and adjusting its pH to 1;

[0045] b) Measure 10mL of polyvinyl alcohol aqueous solution, and soak the qualitative medium-speed filter paper in the aqueous solution of hydrophilic polymer for 30min;

[0046] c) introducing the infiltrated cellulose filter paper into a solution containing glyoxal, and reacting for 12 hours at a temperature of 50°C;

[0047] d) The cross-linked filter paper is repeatedly washed with ethanol and deionized water to remove unreacted cross-linking agent and water-soluble polymer, and finally the cross-linked filter paper is dried to constant weight to obtain special wettability Oil-water separation membrane.

[0048] g) use such as figure 2 The shown oil-water separation device is used for oil-water separation, and the dried gel filter paper is placed between two glass vessels (such as figure 2 shown), gasoline and saturated sodium chloride aqueous solution ar...

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Abstract

The invention relates to a preparation method of an oil-water separation membrane used in strong acid, strong alkali and high salt environments. According to the preparation method, a piece of filter paper which servers as a supporting porous substrate is co-crosslinked with a hydroxyl-containing hydrophilic polymer to form a hydrogel coated network filter-paper membrane in a multi-network structure. Hydrogel coated network filter-paper membranes with different structures and different components can be prepared from filter paper with different pore sizes and different hydrophilic polymers with different molecular weights. The hydrogel coated network filter paper membrane prepared by adopting the preparation method can be used for oil-water separation in complex strong acid, strong alkali and high salt environments, is highly stable, is reusable and has a certain industrial application value, and the preparation method is simple, is low in preparation cost, is energy-saving and is environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a preparation method and application of an oil-water separation membrane under complex environments such as strong acid, strong alkali and high salt. The preparation process is simple, the preparation cost is low, energy saving and environmental protection, and has great industrial application value. Background technique [0002] With the massive discharge of domestic oily sewage and the frequent occurrence of accidents such as oil spills at sea, higher challenges have been put forward for the development of oil-water separation materials and technologies. Oily wastewater mainly comes from petrochemical, metal smelting, leather and tanning, textile, food processing and marine oil spills. Essentially, oil-water separation is a problem of interface science, so how to realize oil-water separation by using the different effects of special wetting properties ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D71/38B01D71/52B01D71/80B01D69/02C02F1/40C02F1/44B01D17/022
Inventor 江雷王树涛樊俊兵宋永杨
Owner BEIJING NATURE STONE SCI TECH DEVP
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