Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of mofs/naa molecular sieve composite membrane for acetic acid dehydration and preparation method thereof

A molecular sieve and composite membrane technology, applied in the field of membrane separation, can solve the problems of poor acid resistance and poor performance, and achieve the effects of improving separation performance, improving acid resistance and good pervaporation performance.

Active Publication Date: 2017-09-15
BEIJING UNIV OF TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that NaA molecular sieve membrane is a typical inorganic membrane, which shows excellent separation performance in ethanol dehydration, however, due to poor acid resistance of NaA type molecular sieve, it has poor performance in acetic acid / water separation

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
  • A kind of mofs/naa molecular sieve composite membrane for acetic acid dehydration and preparation method thereof
  • A kind of mofs/naa molecular sieve composite membrane for acetic acid dehydration and preparation method thereof
  • A kind of mofs/naa molecular sieve composite membrane for acetic acid dehydration and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] NaA molecular sieve membrane is used as the substrate, the membrane pore size is 0.1-0.2μm, and the membrane area is 28cm 2 , the polyelectrolyte used is polyethyleneimine (PEI, the molecular weight is 60000), the metal source is zirconium tetrachloride (ZrCl 4 , the molecular weight is 233.2), and the organic ligand is 2-aminoterephthalic acid (C 8 h 7 o 4 N, the molecular weight is 181.15), the solvent of polyethyleneimine is H 2 O.

[0022] Preparation conditions and methods:

[0023] (1) Prepare UIO-66-NH by solvothermal method 2 . Dissolve 0.932g of zirconium tetrachloride and 1.45g of 2-aminoterephthalic acid in 24ml of DMF solvent to prepare a solution, and add 0.665ml of HCl solution to it, transfer the mixed solution to the reaction kettle, and keep it at 220°C React in the oven for 16 hours, take it out and let it stand at room temperature, filter, rinse with a small amount of DMF, wash with methanol several times, dry at room temperature, soak it in DM...

Embodiment 2

[0031] NaA molecular sieve membrane is used as the substrate, the membrane pore size is 0.1-0.2μm, and the membrane area is 28cm 2 , the polyelectrolyte used is polyethyleneimine (PEI, the molecular weight is 60000), the metal source is zirconium tetrachloride (ZrCl 4 , the molecular weight is 233.2), and the organic ligand is 2-aminoterephthalic acid (C 8 h 7 o 4 N, the molecular weight is 181.15), the solvent of polyethyleneimine is H 2 O.

[0032] Preparation conditions and methods:

[0033] (1) Preparation of UiO-66-NH by solvothermal method 2 . Dissolve 0.932g of zirconium tetrachloride and 1.45g of 2-aminoterephthalic acid in 24ml of DMF solvent to prepare a solution, and add 0.665ml of HCl solution to it, transfer the mixed solution to the reaction kettle, and keep it at 220°C React in the oven for 16 hours, take it out and let it stand at room temperature, filter, rinse with a small amount of DMF, wash with methanol several times, dry at room temperature, soak i...

Embodiment 3

[0041] NaA molecular sieve membrane is used as the substrate, the membrane pore size is 0.1-0.2μm, and the membrane area is 28cm 2 , the polyelectrolyte used is polyethyleneimine (PEI, the molecular weight is 60000), the metal source is zirconium tetrachloride (ZrCl 4 , the molecular weight is 233.2), and the organic ligand is 2-aminoterephthalic acid (C 8 h 7 o 4 N, the molecular weight is 181.15), the solvent of polyethyleneimine is H 2 O.

[0042] Preparation conditions and methods:

[0043] (1) Preparation of UiO-66-NH by solvothermal method 2 . Dissolve 0.932g of zirconium tetrachloride and 1.45g of 2-aminoterephthalic acid in 24ml of DMF solvent to prepare a solution, and add 0.665ml of HCl solution to it, transfer the mixed solution to the reaction kettle, and keep it at 220°C React in the oven for 16 hours, take it out and let it stand at room temperature, filter, rinse with a small amount of DMF, wash with methanol several times, dry at room temperature, soak i...

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 discloses an MOFs / NaA molecular sieve composite membrane for acetic acid dehydration and a preparation method for the MOFs / NaA molecular sieve composite membrane, and belongs to the technical field of membrane separation. The preparation method comprises the steps of preparing MOFs particles by virtue of a solvothermal method; preparing MOFs / polymer electrolyte membrane solution by adopting a blending method, and performing ultrasonic dispersion and standing defoaming; compounding MOFs / polymer electrolyte on the surface of a NaA molecular sieve membrane to form a hydrophilic acid-resistant separation layer by virtue of an impregnation method; drying the hybrid membrane for 1 hour at 120 DEG C to cure the acid-resistant layer. According to the MOFs / NaA molecular sieve composite membrane for acetic acid dehydration and the preparation method for the MOFs / NaA molecular sieve composite membrane, a process is simple, the prepared composite membrane is high in pervaporation performance, and acid resistance is greatly improved.

Description

technical field [0001] The invention relates to a MOFs / NaA molecular sieve composite membrane used for acetic acid dehydration and a preparation method thereof, belonging to the technical field of membrane separation. Background technique [0002] As an important organic chemical raw material, acetic acid is widely used in industries such as synthetic fibers, medicine, dyes, spices, pesticides, and food additives. For a long time, the separation of acetic acid / water system has been widely concerned by people. Although acetic acid and water do not form azeotropes, the relative volatility of the two is not large, and the separation is relatively difficult. At present, the ordinary rectification and azeotropic rectification processes used in industrial production consume high energy consumption. Pervaporation is a clean, energy-saving and efficient membrane separation technology, which is widely used in the dehydration of organic solvents. One of the key factors affecting mem...

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 Patents(China)
IPC IPC(8): B01D71/02B01D69/12B01D67/00
CPCB01D67/00B01D69/02B01D69/12B01D71/028B01D2323/12B01D2323/46B01D2325/30B01D2325/36
Inventor 王乃鑫张国军纪树兰李杰四新国
Owner BEIJING UNIV OF TECH