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Hydrophilic organic ceramic composite permeable vaporizing membrane and its preparation method and application

An organic ceramic and pervaporation technology, applied in the field of separation membranes, can solve the problems of complex preparation process, high preparation cost and high technical requirements, and achieve the effects of good selectivity and permeability, good adaptability and high separation selectivity.

Inactive Publication Date: 2007-10-24
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation process of this film is complicated, the technical requirements are high, and the yield is low.
Due to the high cost of membrane preparation, it is also difficult to promote

Method used

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  • Hydrophilic organic ceramic composite permeable vaporizing membrane and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The microporous ceramic membrane that present embodiment uses, its main material is Al 2 o 3 . The thickness of the microporous membrane is about 3mm, and the effective area is 1cm 2 . The average pore diameter of the surface layer of this microporous membrane is about 0.5m.

[0032] The microporous ceramic membrane was treated with 0.2M sulfuric acid for 1h, then placed in a 100mL autoclave, added 2mL of butyl silicate, sealed and treated in an oven at 180°C for 2h, and then in an electric furnace at 550°C for 1h. The pure water flux of the treated membrane at 150Pa vacuum is 540L / m2 h.

[0033] The above-mentioned microporous ceramic membrane was placed in a three-necked flask equipped with a spherical condenser, 20 mL of toluene and 1 g of methacryloxy)propyltrimethoxysilane were added, and heated to reflux for 5 hours. After cooling, the membrane was removed and rinsed with toluene to remove unreacted silane coupling agent.

[0034] The microporous ceramic mem...

Embodiment 2

[0037] A microporous ceramic composite membrane was prepared by compounding an analcite microporous layer with a thickness of about 10 m on a microporous cordierite carrier. The thickness of the composite film is about 3mm and the area is 1cm 2 . The average pore diameter of the microporous membrane is about 1m.

[0038] The above ceramic membrane was treated with 0.2M sulfuric acid for 1h, then placed in a 100mL autoclave, added 4mL butyl silicate, sealed and treated in an oven at 180°C for 2h, and then in an electric furnace at 550°C for 1h. The pure water flux of the treated membrane at 150Pa vacuum is 350L / m 2 h.

[0039] The above ceramic membrane was placed in a three-necked flask equipped with a spherical condenser, and then 25 mL of toluene and 5 g of -(methacryloyloxy)propyltrimethoxysilane were added. Heat to reflux for 3 hours. After cooling, the microporous membrane is taken out, and the surface of the membrane is washed with toluene, ethanol, and water succes...

Embodiment 3

[0043] In this embodiment, a macroporous ceramic membrane (36 mm×2.5 mm, average pore diameter: 2-3 μm) is used. The ceramic film was first treated by TEOS vapor deposition method at 180° C. for 50 min, and the amount of TEOS was 5 mL. The resulting film was calcined in an electric furnace at 500°C for 5 hours. The pure water penetration rate under 150Pa vacuum is 760L / m 2 h.

[0044] The above ceramic membrane was placed in a three-necked flask equipped with a spherical condenser, and then 50 mL of toluene and 5 g of -(methacryloyloxy)propyltrimethoxysilane were added and heated to reflux for 4 hours. After cooling, the microporous membrane was taken out, and the surface of the membrane was rinsed with toluene to remove unreacted silane coupling agent.

[0045] The silane-treated macroporous ceramic membrane composite membrane was placed in a 100 mL three-neck flask, and 50 mL of 8% acrylic acid aqueous solution and 0.03 g of potassium persulfate were added. Under the pro...

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Abstract

The invention relates to a separation film technique. It uses the ceramic porous film as the carrier, hydrophilic polymer as the active layer. The porous ceramic film deposited in gas or liquid through TEOS, silanization processing and hydrophilic monomer grafting effect on the inorganic microporous film carrier to form chemical key connected hydrophilic separation layer. It enjoys high stability, good feature in separation, extensive use in application. It is a separation film with high selectivity, permeatability, applicable to most organic solvent and their dehydration, purification and condensation.

Description

technical field [0001] The invention belongs to the field of separation membrane technology, and in particular relates to a high-efficiency hydrophilic organic ceramic composite pervaporation separation membrane with a microporous ceramic membrane as a carrier and grafted on the surface with a hydrophilic polymer, a preparation method thereof and a method for dehydration and separation of organic solvents. Applications. Background technique [0002] Pervaporation membrane separation technology is specially used for the separation of liquid mixtures, especially for the separation of azeotropes and liquid mixtures with similar boiling points. It has the characteristics of high efficiency, energy saving, and no pollution. It is a separation technology with great development potential. However, so far, the application of this technology in industry is not satisfactory. The reason is mainly because the permeation flux of the membrane is small, the production efficiency is low, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D69/12B01D61/36
CPCB01D71/70B01D67/00931
Inventor 平郑骅周立志曹绪芝张桃周
Owner FUDAN UNIV
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