Hollow fiber acidproof and permeable molecular sieve membrane and its preparation method

A molecular sieve and fiber technology, applied in semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve the problems of high investment cost, small filling area, etc., and achieve the effect of excellent separation performance

Inactive Publication Date: 2012-04-04
NANJING UNIV OF TECH
View PDF7 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The filling area of ​​this type of membrane module is small, generally 30-250m 2 m -3 , the device investment cost is high

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
  • Hollow fiber acidproof and permeable molecular sieve membrane and its preparation method
  • Hollow fiber acidproof and permeable molecular sieve membrane and its preparation method
  • Hollow fiber acidproof and permeable molecular sieve membrane and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation of embodiment 1 hollow fiber T-type molecular sieve membrane

[0027] The support used to prepare the T-type molecular sieve membrane is YSZ (yttria-stabilized zirconia) hollow fiber with an average pore diameter of 1.28 μm, a porosity of 52.3%, an outer diameter of 1.86 mm and a wall thickness of 0.40 mm.

[0028] T-type molecular sieve seeds with a particle size of about 2 μm (such as figure 1 , 2 ) is formulated into an emulsion, and the seed crystals are evenly coated on the surface of the support body by the wiping method, and dried to obtain a YSZ hollow fiber support body coated with T-type molecular sieve crystal seeds (such as image 3 ).

[0029] Molar Composition to SiO 2 : Al 2 o 3 :Na 2 O:K 2 O:H 2 O=1: 0.05: 0.26: 0.09: 17 synthetic solution (wherein the silicon source is silica sol; the aluminum source is aluminum hydroxide) was stirred and aged at room temperature for 24h, poured into a polytetrafluoro reactor; the coated crystal ...

Embodiment 2

[0030] The preparation of embodiment 2 hollow fiber T-type molecular sieve membranes

[0031] The T-type molecular sieve seed crystals were mechanically crushed in advance by wet ball milling technology to obtain small-sized T-type molecular sieve seeds with a particle size of about 0.29 μm. Coating YSZ-doped α-Al with broken seed crystals by ball milling by vacuum suction 2 o 3 Hollow fiber surface. The support has an average pore diameter of 0.35 μm, a porosity of 35%, an outer diameter of 3.60 mm, and a wall thickness of 0.9 mm.

[0032] Molar Composition to SiO 2 : Al 2 o 3 :Na 2 O:K 2 O:H 2 The synthesis solution of O=1:0.02:0.4:0.02:13 (where the silicon source is silica sol; the aluminum source is aluminum hydroxide) was stirred and aged at room temperature for 12 hours. The synthesis temperature was 120° C., and the synthesis time was 20 hours to prepare a T-type molecular sieve membrane with a thickness of 30 μm. All the other operating conditions are the sa...

Embodiment 3

[0033] The preparation of embodiment 3 hollow fiber T-type molecular sieve membranes

[0034] α-Al doped with silica 2 o3 The hollow fiber is used as a support body, and a T-type molecular sieve membrane is prepared. The average pore diameter of the support is 5.78 μm, the porosity is 28.4%, the outer diameter is 0.80 mm, and the wall thickness is 0.2 mm.

[0035] T-type molecular sieve seeds with a particle size of 8 μm were prepared into a suspension with a concentration of 3 wt.%, and dispersed uniformly by ultrasonication. The support body is soaked in the suspension for 30 seconds, then taken out, and dried to obtain a hollow fiber support body coated with seed crystals.

[0036] Molar Composition to SiO 2 : Al 2 o 3 :Na 2 O:K 2 O:H 2 The synthesis liquid of O=1:0.07:0.2:0.27:25 (wherein the silicon source is precipitated silica; the aluminum source is sodium metaaluminate) is stirred and aged at room temperature for 12h, and then put into a polytetrafluoroethylen...

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

No PUM Login to view more

Abstract

The invention relates to a hollow fiber acidproof and permeable molecular sieve membrane and its preparation method. The hollow fiber acidproof and permeable molecular sieve membrane is characterized by taking hollow fiber porous ceramic as the support body and a T-type molecular sieve membrane as the membrane layer. The method comprises the steps of: mixing a silicon source, an aluminum source, sodium hydroxide, potassium hydroxide and water uniformly in proportion, conducting stirring for aging so as to obtain a reaction solution; putting a hollow fiber porous ceramic support body with a precoated T-type molecular sieve crystal seed into a reaction vessel, adding the reaction solution for hydrothermal synthesis; after the reaction, taking out the membrane and washing it to pH of 7-10, and drying it, thus obtaining a hollow fiber acidproof and permeable molecular sieve membrane. The T-type molecular sieve membrane of the invention is in a hollow fiber shape, and has a filling area over 1000m<2>.m<-3>, which is far higher than the filling area (30-250m<2>.m<-3>) of a single-channel tubular membrane. Besides, the hollow fiber porous ceramic support body has a thin wall, thus being in favor of reducing the support body mass transfer resistance and improving the pervaporation flux.

Description

technical field [0001] The invention relates to a hollow fiber water-permeable molecular sieve membrane and a preparation method thereof, in particular to an acid-resistant molecular sieve membrane with a high filling area and a preparation method thereof, belonging to the field of inorganic membranes. Background technique [0002] Membrane separation technology has the advantages of high efficiency, low energy consumption, and simple operation. In recent years, it has been widely used in the fields of chemical industry, food industry, wastewater treatment, and medical technology. As the third-generation membrane separation technology, pervaporation has obvious technical and technical advantages in the separation of near-boiling point and azeotropic mixtures that are difficult or impossible to separate by distillation, the recovery and reuse of organic solvents, and the removal of trace water in organic solvents. Economic advantages, and thus has been extensively developed. ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D69/10B01D67/00
Inventor 顾学红王学瑞徐南平
Owner NANJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap