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Hydrophile organic-abio compound permeation vaporisation separation membrane and and method of preparing the same and application thereof

An inorganic composite and pervaporation technology, applied in the field of separation membranes, can solve problems such as low yield, complicated preparation process of inorganic membranes, and difficulty in popularization

Inactive Publication Date: 2008-01-23
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of inorganic membranes is complicated, the yield rate is low, and the investment cost of equipment is high, so it is difficult to promote

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The inorganic ceramic membrane support body used in this embodiment is a macroporous ceramic membrane of φ36×25 with an average pore diameter of 2 to 3 μm. At 185° C., the ceramic membrane support body was chemically vapor deposited in an autoclave for 55 minutes, and then used After coupling treatment with silane coupling agent KH-570, carry out grafting reaction in 50mL of 9.2% glycidyl acrylate toluene solution, the initiator is AIBN, the concentration is 0.005ml / ml, and the reaction temperature is 80°C , the grafting time is 90min.

[0018] After the reaction, the grafted film was placed in a 0.210 g / mL L-histidine toluene solution and reacted at 120° C. for 30 min. The product was washed repeatedly with water to remove unreacted histidine. After histidine treatment, the contact angle of water decreased from 106° to 60°. The membrane is used for the separation of 95% methanol water solution, and its permeation flux is 152g / m 2 h, the content of water in the perme...

Embodiment 2

[0020] The conditions used in Example 1 were used for vapor deposition, coupling reaction and graft polymerization.

[0021] In this example the hydrolytic ring-opening of glycidyl acrylate was carried out in an alkaline medium. The grafted membrane was placed in an ammonia solution with a pH of 8-9, refluxed at 35° C. for 50 minutes, and washed with water after the reaction to remove excess ammonia water. After hydrolysis, the water contact angle of the membrane decreased from 106° of the GMA-grafted membrane to 56° after ring opening. The membrane is used for the separation of 95% methanol water solution, and its permeation flux is 322.3g / m 2 h, the measured water content in the permeate is 98.8%; the membrane is used for the separation of 95% ethanol aqueous solution, and its permeate flux is 420.3g / m 2 h, the measured water content in the permeate is 99.5%; the membrane is used for the separation of 95% isopropanol aqueous solution and its permeate flux is 560.5g / m 2 h,...

Embodiment 3

[0023] The conditions used in Example 1 were used for vapor deposition, coupling reaction and graft polymerization.

[0024] In this example, the hydrolytic ring-opening of glycidyl acrylate was carried out in acidic medium. The grafted film was placed in 18.5% sulfuric acid aqueous solution at a temperature of 60° C. for 50 minutes. After the reaction, wash with water repeatedly to remove excess acid. The water contact angle of the membrane after hydrolytic ring-opening decreased from 106° of the GMA-grafted membrane to 63° after ring-opening. For the separation of 95% methanol aqueous solution, the permeate flux is 135g / m 2 h, the measured water content in the permeate is 97.6%; the membrane is used for the separation of 95% ethanol water solution, and its permeate flux is 229g / m 2 h, the measured water content in the permeate is 98%.

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Abstract

The invention relates to barrier separation technology field, in particular to an organic to inorganic infiltration and vaporization and preparation method and application. By the chemical vapor deposition, graft polymerization and ring cleavage reaction on the surface of macroporous ceramic membrane, make out hydrophilcity compound infiltration vaporization separation membrane with inorganic ceramic membrane as carrier. Wherein, graft polymerization is preceded in an oleic phase, free radicals graft comprises olefin compound of epoxy group. The separation membrane not only has good chemical and heat stability, but also shows excellent performance in the separation of isopropanol-water solution and especially in the separation of methanol water solution.

Description

technical field [0001] The invention belongs to the technical field of separation membranes, and in particular relates to an organic-inorganic composite pervaporation membrane and its preparation method and application. Background technique [0002] Pervaporation is a membrane technology developed in the 1980s abroad 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. Pervaporation utilizes the different dissolution and diffusion properties of the membrane for the components in the liquid mixture to achieve the purpose of separation. [0003] The pervaporation membrane made of polymer material has simple preparation process, low cost, many varieties, and high separation efficiency of the membrane, so it has been applied on a large scale. But because of its high temperature resistance, organic solvent resistance, poor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/00
Inventor 平郑骅张桃周
Owner FUDAN UNIV
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