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A self-crosslinked hyperbranched polymer-inorganic tubular composite membrane for separation of aromatics/alkanes and its preparation method

A hyperbranched polymer and inorganic tubular technology, applied in the field of membrane separation, can solve the problems of complex equipment and process, introduction of auxiliary reagents, high energy consumption, etc., and achieve the effect of low cost, excellent separation effect and simple process

Active Publication Date: 2016-05-18
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, azeotropic distillation, extractive distillation and liquid-liquid extraction are usually used in industry to separate aromatics / alkanes mixtures. These traditional separation methods often have complex equipment and processes, high energy consumption, large investment and the need to introduce Disadvantages of other auxiliary reagents

Method used

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  • A self-crosslinked hyperbranched polymer-inorganic tubular composite membrane for separation of aromatics/alkanes and its preparation method
  • A self-crosslinked hyperbranched polymer-inorganic tubular composite membrane for separation of aromatics/alkanes and its preparation method
  • A self-crosslinked hyperbranched polymer-inorganic tubular composite membrane for separation of aromatics/alkanes and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The inorganic porous membrane used is a tubular alumina ultrafiltration membrane with a membrane area of ​​26cm 2 , the hyperbranched polymer used is BoltornW3000, and the solvent used is N,N-dimethylformamide.

[0031] Composite film preparation method:

[0032] (1) Prepare W3000 solution with N,N-dimethylformamide, and disperse evenly under the action of magnetic stirring, wherein the concentration of W3000 is 10wt%;

[0033] (2) Pretreatment of the inorganic tubular membrane: immerse the inorganic membrane in 0.8wt% 3-amino-triethoxysilane ethanol solution for 2 hours, take it out and place it in an oven at 110°C for high temperature treatment for 2 hours;

[0034] (3) placing the treated film in the mixed solution prepared in step (1) for 30 min;

[0035] (4) Take out the tubular membrane and place it in an oven at 150°C for heat treatment for 1 hour;

[0036] (5) Repeat steps (3) to (4) once more to prepare a self-crosslinked hyperbranched polymer-inorganic comp...

Embodiment 2

[0040] The inorganic porous membrane used is a tubular alumina ultrafiltration membrane with a membrane area of ​​26cm 2 , the hyperbranched polymer used is BoltornW3000, and the solvent used is N,N-dimethylformamide.

[0041] Composite film preparation method:

[0042] (1) Prepare W3000 solution with N,N-dimethylformamide, and disperse evenly under the action of magnetic stirring, wherein the concentration of W3000 is 5wt%;

[0043] (2) Pretreatment of the inorganic tubular membrane: immerse the inorganic membrane in 0.8wt% 3-amino-triethoxysilane ethanol solution for 2 hours, take it out and place it in a 110°C oven for high temperature treatment for 2 hours;

[0044] (3) placing the treated film in the mixed solution prepared in step (1) for 30 min;

[0045] (4) Take out the tubular membrane and place it in an oven at 150°C for heat treatment for 1 hour;

[0046] (5) Repeat steps (3) to (4) once more to prepare a self-crosslinked hyperbranched polymer-inorganic composite...

Embodiment 3

[0050] The inorganic porous membrane used is a tubular alumina ultrafiltration membrane with a membrane area of ​​26cm 2 , the hyperbranched polymer used is BoltornW3000, and the solvent used is N,N-dimethylformamide.

[0051] Composite film preparation method:

[0052] (1) Prepare W3000 solution with N,N-dimethylformamide, and disperse evenly under the action of magnetic stirring, wherein the concentration of W3000 is 10wt%;

[0053] (2) Pretreatment of the inorganic tubular membrane: immerse the inorganic membrane in 0.8wt% 3-amino-triethoxysilane ethanol solution for 2 hours, take it out and place it in an oven at 110°C for high temperature treatment for 2 hours;

[0054] (3) placing the treated film in the mixed solution prepared in step (1) for 20 minutes;

[0055] (4) Take out the tubular membrane and place it in an oven at 150°C for heat treatment for 1 hour;

[0056] (5) Repeat steps (3) to (4) once more to prepare a self-crosslinked hyperbranched polymer-inorganic co...

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Abstract

The invention discloses an arene / alkane separated self-crosslinking hyperbranched polymer-inorganic tubular composite membrane and a preparation method, and belongs to the field of membrane separation. According to the invention, a tubular ceramic porous membrane is adopted to be used as a supporting layer, and industrial grade hyperbranched polymer rich in hydroxyl and carboxyl is used as a composite membrane separating layer, so as to prepare the organic-inorganic composite membrane. Being utilized the characteristic of being smaller in molecule and good in flowability, the hyperbranched polymer enters a pore channel of the supporting layer through the adoption of a simple impregnation method, so that a 'pore filling' structure is obtained; being utilized the characteristic of containing two reactive groups, the hyperbranched polymer performs self-crosslinking membrane formation through the adoption of heat treatment. The method adopted by the invention is simple and feasible, the material is easy to obtain, the prepared composite membrane is used for arene / alkane separation in the field of pervaporation, has better performance and stability, and has potential application prospect.

Description

technical field [0001] The invention relates to a pervaporation membrane and its preparation technology, and in particular provides a specific method for preparing a self-crosslinked hyperbranched polymer-inorganic tubular composite membrane for the separation of aromatics / alkanes, belonging to the field of membrane separation. Background technique [0002] The separation of aromatic / alkane mixtures is of great significance in the field of petrochemical industry. Due to their similar physical and chemical properties, the efficient separation of aromatic / alkane mixtures has always been a difficult problem to be solved in the chemical industry. At present, azeotropic distillation, extractive distillation and liquid-liquid extraction are usually used in industry to separate aromatics / alkanes mixtures. These traditional separation methods often have complex equipment and processes, high energy consumption, large investment and the need to introduce Other disadvantages such as a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D71/48B01D67/00B01D61/36C07C15/06C07C9/15C07C7/144
Inventor 纪树兰汪林王乃鑫张蓉吴桐张悦
Owner BEIJING UNIV OF TECH