Preparation of a Biomass Emulsion Separation Membrane and Its Application in Selective Emulsion Separation

An emulsion separation and biomass technology, which is applied in the fields of composite membrane materials and oil-water separation, can solve the problems of difficult realization of responsive copolymers or responsive surface creation and limitations of large-scale preparation, and achieves low cost, convenient operation and high separation efficiency. Effect

Active Publication Date: 2019-10-11
SHENZHEN OCEAN GUARD ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of these methods necessitates additional processing of materials to introduce stimuli-responsive molecules, while the creation of responsive copolymers or responsive surfaces is difficult to achieve.
Therefore, the large-scale preparation of these tunable wettability materials is still limited, and finding a facile method to prepare tunable wettability materials remains a great challenge.

Method used

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  • Preparation of a Biomass Emulsion Separation Membrane and Its Application in Selective Emulsion Separation
  • Preparation of a Biomass Emulsion Separation Membrane and Its Application in Selective Emulsion Separation
  • Preparation of a Biomass Emulsion Separation Membrane and Its Application in Selective Emulsion Separation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1, the preparation of biomass emulsion separation membrane

[0031] Coprinus comatus is dried and crushed to a particle size of 0.1-0.3 μm; stirred in 2.0-4.0 mol / L NaOH solution for 120-150 min, filtered, and dried;

[0032] Fully disperse the alkali-treated Coprinus comatus powder and sodium alginate in water respectively to form Coprinus comatus powder solution and sodium alginate solution, and then mix the two solutions. In the mixed solution, the concentration of Coprinus comatus powder is 6.0 ~ 8.0 mg / mL, the concentration of sodium alginate is 8 ~ 12 mg / mL; then the mixed solution was stirred and reacted at 20 ~ 30°C for 10 ~ 20 min to obtain the reaction solution;

[0033] A microporous filter membrane is fixed in the vacuum filtration device, and the microporous filter membrane is a PVDF filter membrane with a pore size of 0.40-0.45 μm. Add the reaction liquid to the microporous filter membrane, then vacuum filter under the pressure of 0.07 ~ 0.09 ...

Embodiment 2

[0034] Embodiment 2, biomass emulsion separation membrane separates kerosene emulsion in water

[0035] Preparation of kerosene-in-water emulsion: Mix surfactant, kerosene and water at a ratio of 0.05: (1-5): (100-500), and stir at 600-1500 rpm for 3-6 h. Among them, the surfactant is Tween 80 (Tween80), and the oil is kerosene. The particle size distribution figure of the prepared water-in-kerosene emulsion is shown in Figure 4 (a). It can be seen from the figure that the particle size of the kerosene-in-water emulsion is 200-1300 nm, which belongs to the micro / nano-scale stable emulsion.

[0036] Emulsion separation experiment test: After the emulsion separation membrane is fixed on the suction filtration device, it is pre-soaked with water. After being completely infiltrated, pour the kerosene-in-water emulsion prepared above onto the emulsion separation membrane in the suction filtration device for suction filtration. As the suction filtration proceeds, the emulsion i...

Embodiment 3

[0038] Embodiment 3, separation of water-in-kerosene emulsion by biomass emulsion separation membrane

[0039] Preparation of water-in-kerosene emulsion: Mix surfactant, water and kerosene at a ratio of 0.05: (1-5): (100-500), and stir at 600-1500 rpm for 3-6 h. Among them, the surfactant is Span 80 (Span80), and the oil is kerosene. The particle size distribution figure of the prepared water-in-kerosene emulsion is shown in Figure 4 (b). It can be seen from the figure that the prepared water-in-kerosene emulsion has a particle size of 200-1300 nm, which belongs to the micro / nano-scale stable emulsion.

[0040] Emulsion separation experiment test: After the emulsion separation membrane is fixed on the suction filtration device, it is pre-soaked with kerosene. After being completely infiltrated, the above-mentioned water-in-kerosene emulsion is poured onto the biomass emulsion separation membrane in the suction filtration device for suction filtration. As the suction filtr...

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Abstract

The invention discloses preparation of a biomass emulsion separation membrane. A preparation method comprises following steps: coprinus comatus powder treated with an alkali and sodium alginate are dispersed in water fully so as to obtain a mixed solution, and the mixed solution is subjected to stirring reaction at 20 to 30 DEG C for 10 to 20min so as to obtain a reaction solution; the reaction solution is subjected to vacuum filtration using a microfiltration membrane, is washed with deionized water, and is dried so as to obtain the biomass emulsion separation membrane. The biomass emulsion separation membrane possesses special superhydrophilic / under water super oleophobic and super oleophylic / under oil hydrophobic performance, is capable of realizing selective separation of oil-in-water emulsion and water-in-oil emulsion via infiltration of a continuous phase, and separation efficiency is higher than 99.0% after a plurality of times of circulation. The raw materials of the biomass emulsion separation membrane are cheap and easily available; the preparation process is simple; operation is convenient; cost is low; and large scale production and application can be realized.

Description

technical field [0001] The invention relates to the preparation of a biomass emulsion separation membrane, which is mainly used for the selective separation of oil-water emulsion, and belongs to the technical field of composite membrane materials and the technical field of oil-water separation. Background technique [0002] Due to the frequent occurrence of oil spill accidents and the discharge of oily wastewater, emulsion separation is another major challenge after oil-water separation. Traditional oil-water separation techniques include air flotation, centrifugation, sedimentation, coagulation, oil skimming, oil adsorption, and even the use of some materials with special wettability. Since the droplet size in the emulsion is less than 20 μm, the above separation techniques are not suitable for separating emulsified oil-water mixtures. According to the stability of the emulsion, oil-water emulsions can generally be divided into two types: emulsions without surfactants and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D69/12B01D17/02B01D17/00
Inventor 李健关鹏张容张研李谋吉李建平
Owner SHENZHEN OCEAN GUARD ENVIRONMENTAL PROTECTION TECH CO LTD
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