Preparation method of ethanol pervaporation hybrid film used for removing methyl alcohol in wastewater

A technology of pervaporation and hybrid membrane, applied in chemical instruments and methods, osmotic/dialysis water/sewage treatment, semi-permeable membrane separation, etc. Problems such as poor temperature resistance, to achieve the effects of low cost, simple preparation method and high temperature resistance

Inactive Publication Date: 2011-04-27
SHANDONG TIANWEI MEMBRANE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Chinese patent ZL200710040764.3 discloses a hydrophilic organic-inorganic composite pervaporation separation membrane and its preparation method and application. Using an inorganic ceramic membrane as a The method of ring reaction is used to prepare organic-inorganic composite pervaporation separation membrane; however, this method prepares a pure organic polymer separation layer on the surface of the ceramic membrane, which has the disadvantage of poor temperature resistance of the membrane and can only be used for 95% high-concentration methanol, etc. The dehydration of alcohols is a preferential water-permeable hybrid membrane, which has limited

Method used

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  • Preparation method of ethanol pervaporation hybrid film used for removing methyl alcohol in wastewater
  • Preparation method of ethanol pervaporation hybrid film used for removing methyl alcohol in wastewater
  • Preparation method of ethanol pervaporation hybrid film used for removing methyl alcohol in wastewater

Examples

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Embodiment 1

[0021] Embodiment 1: prepare the product for Pervaporation Permeabilization Alcohol Hybrid Membrane for Removing Methanol from Wastewater

[0022] In an air or nitrogen atmosphere, add 3 g of polyvinyl alcohol (referred to as PVA) with a molecular weight of 1750 to a 250 mL container equipped with a stirrer, add water to prepare a 3% polyvinyl alcohol aqueous solution; at 90 ° C Stir continuously until PVA is completely dissolved, continue stirring for 5h, add 3mL of silane coupling agent N-β-aminoethyl-γ-aminopropyltrimethoxysilane (A-1120) and 1mL of dilute hydrochloric acid with a concentration of 0.1M , carry out sol-gel reaction at 30°C for 24 hours, continue to stir for 10 hours, then add dropwise 3 mL of acetaldehyde solution of a cross-linking agent with a mass percent concentration of 40% to carry out cross-linking reaction for 24 hours, until a solution is obtained, and the solution is left standing to remove Bubble. When the molecular weight of PVA is larger, PVA ...

Embodiment 2

[0034] Embodiment 2: with reactant mass ratio polyvinyl alcohol (PVA): N-β-aminoethyl-γ-aminopropyltrimethoxysilane (A-1120): phenylacetaldehyde=0.1: 5: 0.3 preparation Pervaporation permeabilization hybrid membrane for methanol removal in wastewater

[0035] Using the same reaction device and operating steps as in Example 1, in an air or nitrogen atmosphere, at a temperature of 0°C, dissolve 0.1g of PVA raw material with a molecular weight of 1750 in water, and add water to prepare a 0.1% concentration by mass. Polyvinyl alcohol aqueous solution, keep stirring until PVA is completely dissolved, continue stirring for 2h, add 5mL silane coupling agent N-β-aminoethyl-γ-aminopropyltrimethoxysilane (A-1120) and 10mL concentration of 0.01M sol-gel reaction at 150° C. for 1 h, and then dropwise added 3 mL of a 10% cross-linking agent phenylacetaldehyde solution at 120° C. for 12 h to obtain a solution. Then use the solution to stand, after defoaming, the Al 2 o 3 Dip the coating ...

Embodiment 3

[0044] Example 3: Preparation of polyvinyl alcohol (PVA):anilinomethyltriethoxysilane (ND-42):butyl titanate:acetaldehyde=10:2:2:0.3 for removing Pervaporation of Methanol in Wastewater Through Alcohol Hybrid Membrane

[0045] Using the same reaction device and operating steps as in Example 1, in an air or nitrogen atmosphere, 10 g of polyvinyl alcohol (PVA) with a molecular weight of 1750 was added to a 250 mL container equipped with a stirrer, and water was added to form a mass percent concentration of 10% polyvinyl alcohol aqueous solution; under the temperature condition of 80 ℃, keep stirring until the PVA is completely dissolved, continue stirring for 5h, add 2mL silane coupling agent anilinomethyltriethoxysilane (ND-42) and 5mL concentration of 0.01 M dilute hydrochloric acid, conduct sol-gel reaction at 30°C for 48h, add 2mL butyl titanate and 15mL solvent N,N-dimethylformamide (DMF) respectively, continue stirring for 12h, then add dropwise 30mL mass percent The cros...

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Abstract

The invention discloses a preparation method of a ethanol pervaporation hybrid film used for removing methyl alcohol in wastewater, which is characterized by comprising the steps of: in inert gas or air, at a temperature of 0-200 DEG C, adding silane coupling agent which is 01.-2 times of the mol of polyvinyl alcohol to polyvinyl alcohol water solution with mass percent concentration of 0.1-10 percent, carrying out sol-gel reaction for 1-48h under the action of diluted acid with mol concentration of 0.001-0.1M, then adding 0.1-30 percent of cross-linking agent in terms of the mass percent of polyvinyl alcohol for cross-linking reaction until obtaining a solution, standing and defoaming the solution and then coating a film to obtain a diaphragm, and then drying the obtained diaphragm in the inert gas or air with the temperature of 0-200 DEG C and the relative humidity of 50-90 percent to obtain the ethanol pervaporation hybrid film used for removing the methyl alcohol The film has highthermal stability and good separating property, is a hybrid film through which the methyl alcohol can permeate preferentially, and can be used for separating and purifying the methyl alcohol wastewater.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a method for preparing a pervaporation-permeable hybrid membrane for removing methanol in wastewater by using polyvinyl alcohol and a silane coupling agent to perform sol-gel reaction and crosslinking reaction. Background technique [0002] Chinese patent ZL200710040764.3 discloses a hydrophilic organic-inorganic composite pervaporation separation membrane and its preparation method and application. Using an inorganic ceramic membrane as a The method of ring reaction is used to prepare organic-inorganic composite pervaporation separation membrane; however, this method prepares a pure organic polymer separation layer on the surface of the ceramic membrane, which has the disadvantage of poor temperature resistance of the membrane and can only be used for 95% high-concentration methanol, etc. The dehydration of alcohols is a preferential water-permeable hybr...

Claims

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Application Information

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IPC IPC(8): B01D71/38B01D67/00B01D69/10C02F1/44C02F101/34
Inventor 刘俊生聂君得邵国泉张凌云
Owner SHANDONG TIANWEI MEMBRANE TECH
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