Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of ceramic hollow-fiber solvent-resistant composite nanofiltration membrane

A composite nanofiltration membrane and solvent-resistant technology, which is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., to achieve excellent chemical stability and mechanical properties, improve the application field, and be easy to clean.

Active Publication Date: 2016-07-13
EAST CHINA UNIV OF SCI & TECH
View PDF6 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, research on inorganic nanofiltration membranes is still in its infancy, and there are few industrial applications.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of ceramic hollow-fiber solvent-resistant composite nanofiltration membrane
  • Preparation method of ceramic hollow-fiber solvent-resistant composite nanofiltration membrane
  • Preparation method of ceramic hollow-fiber solvent-resistant composite nanofiltration membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Preparation of γ-Al 2 o 3 / α-Al 2 o 3 Hollow fiber solvent-resistant composite nanofiltration membrane for the removal of salt ions in water

[0045] 1. Under the water condition of 70°C, according to the mass ratio polyethersulfone (PES): polyvinylpyrrolidone (PVP): Al 2 o 3 Particles: 1-methyl-2-pyrrolidone = 8: 0.5: 50: 41.5, stir and mix evenly, keep for more than 24 hours to obtain a uniform and stable casting solution; prepare α-Al by wet spinning method 2 o 3 Hollow fiber ceramic base membrane, soaked in pure water for 24 hours, dried and sintered in an electric furnace with programmed temperature rise, after sintering, naturally cool down to obtain the finished membrane;

[0046] 2. Add 10.5g aluminum isopropoxide (Al(OC 3 h 7 ) 3 ) slowly added in batches to 90g of deionized water mechanically stirred at 85°C, after hydrolysis for 2 hours, the isopropanol produced by the reaction was removed, and 0.7875g of debonding agent HNO was added 3 After aging ...

Embodiment 2

[0050] Under the condition of 70°C waters, the mass ratio of polyethersulfone (PES): polyvinylpyrrolidone (PVP): Al 2 o 3 Particles: 1-methyl-2-pyrrolidone = 8: 0.5: 50: 41.5, stir and mix evenly, keep for more than 24 hours to obtain a uniform and stable casting solution; prepare α-Al by wet spinning method 2 o 3 Hollow fiber ceramic base membrane, soaked in pure water for 24 hours, dried and sintered in an electric furnace with programmed temperature rise, after sintering, naturally cool down to obtain the finished membrane;

[0051] 2. Put 10.2g aluminum isopropoxide (Al(OC 3 h 7 ) 3 ) slowly added in batches to 90g of deionized water mechanically stirred at 85°C, after hydrolysis for 2 hours, the isopropanol produced by the reaction was removed, and 0.7875g of debonding agent HNO was added 3 After aging in a water bath at 90°C for 12 hours, add 30 mL of 5wt.% PVA solution and continue stirring for 3 hours to finally obtain γ-AlOOH sol;

[0052] 3. Apply the γ-AlOOH s...

Embodiment 3

[0055] Under the condition of 70°C waters, the mass ratio of polyethersulfone (PES): polyvinylpyrrolidone (PVP): Al 2 o 3 Particles: 1-methyl-2-pyrrolidone = 8: 0.5: 50: 41.5, stir and mix evenly, keep for more than 24 hours to obtain a uniform and stable casting solution; prepare α-Al by wet spinning method 2 o 3 Hollow fiber ceramic base membrane, soaked in pure water for 24 hours, dried and sintered in an electric furnace with programmed temperature rise, after sintering, naturally cool down to obtain the finished membrane;

[0056] 2. Put 20.4g aluminum isopropoxide (Al(OC 3 h 7 ) 3 ) slowly added in batches to 180g of deionized water mechanically stirred at 85°C. After hydrolysis for 2 hours, the isopropanol produced by the reaction was removed, and 1.575g of debonding agent HNO was added. 3 After aging in a water bath at 90°C for 12 hours, add 30 mL of 10wt.% PVA solution and continue stirring for 3 hours to finally obtain γ-AlOOH sol;

[0057]3. Apply the γ-AlOOH ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Average pore sizeaaaaaaaaaa
Osmotic fluxaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of a ceramic hollow-fiber solvent-resistant composite nanofiltration membrane.The preparation method includes the steps of (1), preparing an alpha-Al2O3 hollow-fiber ceramic base membrane; (2) preparing gamma-AlOOH sol; (3), coating the gamma-AlOOH sol on the alpha-Al2O3 hollow-fiber ceramic base membrane uniformly by a dip-coating technique of a sol-gel method for 1-6 times for 5-40 seconds so as to obtain a gamma-Al2O3 / alpha-Al2O3 hydrogel membrane; (4), ageing the composite gamma-Al2O3 / alpha-Al2O3 hydrogel membrane under relative humidity of 30-70% at 5-30 DEG C for more than 4 hours, roasting in a heating furnace by a temperature programming method and naturally cooling so as to obtain the gamma-Al2O3 / alpha-Al2O3 hollow-fiber solvent-resistant composite nanofiltration membrane.The preparation method has the advantages of preparation technology maturity, simple devices and easiness in operation, and the gamma-Al2O3 / alpha-Al2O3 hollow-fiber solvent-resistant composite nanofiltration membrane is 2.12 micrometers in separating membrane thickness and 1.87 nm in membrane mean pore size, can be used for removing multivalent cations such as trivalent cations and divalent cations in a water body and is highly resistant to solvents, corrosion and contamination.

Description

【Technical field】 [0001] The invention relates to the technical field of separation engineering membrane separation, in particular to a method for preparing a ceramic hollow fiber solvent-resistant composite nanofiltration membrane used for cation separation. 【Background technique】 [0002] The working principle of nanofiltration membrane (NF) is the same as that of ultrafiltration (UF) and reverse osmosis (RO). Among them, organic molecules with a molecular weight cut-off of 200 to 1000 Da are widely used in the recovery of organic solvents in wastewater, catalyst recovery in organic solvents, and recovery of solvents in petroleum refining and other chemical industries; many nanofiltration membrane surfaces are positively charged or Negatively charged, according to the Donnan effect, the ability to intercept cations with different valences is different, and it can effectively separate multivalent and monovalent ions, so it is often used in industrial wastewater for magnesiu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01D71/02B01D69/12B01D69/08B01D67/00
Inventor 许振良王珍魏永明曹悦
Owner EAST CHINA UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com