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Preparation method of sodium alga acid mixed-substrate membrane for alcohol-water separation

A technology of mixed matrix membrane and sodium alginate, which is applied in separation methods, liquid separation, semipermeable membrane separation, etc., can solve the problems of solvent resistance, temperature resistance and poor mechanical properties, and achieve strong hydrophobicity, cost reduction, good selective effect

Inactive Publication Date: 2018-12-18
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

Compared with other organic membranes, sodium alginate has the advantages of good flexibility, high air permeability and low density, but its solvent resistance, temperature resistance and mechanical properties are poor.

Method used

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  • Preparation method of sodium alga acid mixed-substrate membrane for alcohol-water separation

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Embodiment 1-3

[0024] A preparation method of sodium alginate mixed matrix membrane used for separating alcohol-water system, sequentially performing the following steps:

[0025] 1) Preparation of reduced graphene oxide-sodium lignosulfonate dispersion: mix the graphene oxide solution with the concentration of 0.03g / ml and sodium lignosulfonate solution, ultrasonically mix and add a small amount of vitamin C, under vigorous stirring Reacting the graphene oxide-sodium lignosulfonate mixture at 95°C for a certain period of time, cooling to room temperature after the reaction, and then sonicating to obtain a uniform dispersion of reduced graphene oxide-sodium lignosulfonate;

[0026] 2) Preparation of membrane solution: Dissolve sodium alginate in dewatering water and stir at constant temperature until it is completely dissolved. Configure 0.03g / ml sodium alginate membrane solution, and then add reduced graphene oxide-sodium lignosulfonate dispersion solution. The volume ratio of the dispersion liq...

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Abstract

The invention discloses a preparation method of a mixed-substrate membrane for alcohol-water separation. The method comprises the steps of pre-synthesizing a reduced graphene oxide-sodium lignosulphonate composite material, adding the synthesized composite material into a sodium alga acid membrane preparing liquid, uniformly dispersing, preparing a sodium alga acid mixed-substrate membrane on an ultra-filtration basement membrane, drying at room temperature, cross-linking and carrying out heat treatment to directly obtain a sodium alga acid pervaporation membrane containing the reduced graphene oxide-sodium lignosulphonate composite material. By utilizing a lamellar hole channel in the reduced graphene oxide-sodium lignosulphonate composite material and the hydrophily, the reduced grapheneoxide-sodium lignosulphonate composite material is added into the membrane preparing liquid, so that the separating performance of the sodium alga acid pervaporation membrane for separating the alcohol-water mixture is improved.

Description

Technical field: [0001] The invention relates to a method for preparing a sodium alginate mixed matrix membrane for separating alcoholic water, in particular to a pervaporation membrane that concentrates ethanol prepared by mixing reduced graphene oxide-sodium lignosulfonate composite material and sodium alginate Preparation. Background technique: [0002] Pervaporation technology is a new type of membrane separation process. Because of its high efficiency, energy saving, and environmental protection, it is expected to replace the traditional high energy consumption distillation process, and play an important role in the in-situ separation of bio-alcohols and the improvement of fermentation efficiency. [0003] Chinese scholars have conducted extensive research and exploration on preferential water-permeable membranes, such as Wu Liguang; Zhu Changle; Liu Mei'e in Chinese patent 94102067.3-"Preparation method and composition of pervaporation water-permeable membrane" invented a met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D61/36B01D67/00B01D71/42B01D17/09
CPCB01D17/005B01D61/362B01D67/0079B01D71/42B01D71/68
Inventor 李赛赛耿欣王璐莹代娟严庆雷建都
Owner BEIJING FORESTRY UNIVERSITY
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