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Novel loaded transition metal composite membrane and preparation method thereof

A transition metal and transition metal ion technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as difficult industrialization and chemical instability, and achieve the effect of easy operation and simple process

Active Publication Date: 2010-04-14
TIANBANG NAT ENG RES CENT OF MEMBRANE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The U.S. patent US005670051 has reported in detail the preparation of various solid polyelectrolyte membranes and their separation performance on olefin / alkane, but due to the chemical instability of the transition metal ionophore in the membrane and the so-called olefin restriction phenomenon Difficult to industrialize

Method used

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  • Novel loaded transition metal composite membrane and preparation method thereof
  • Novel loaded transition metal composite membrane and preparation method thereof
  • Novel loaded transition metal composite membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] On the support membrane 1 porous polyetherimide ultrafiltration membrane, the mass concentration of 6% PEBA2533 was coated by dip coating method, the solvent was butanol, the coating temperature was 50 ° C, and the drying time was 4 hours. The prepared composite membrane was vacuum-coated. Dry in an oven at 30° C. for 24 h to remove the remaining solvent to form a separation layer 2 . Then using the one-sided ligand solution exchange method, with 1.0M AgNO 3 The solution introduces transition metal ions into the separation layer of the composite membrane on one side, pours out the transition metal soluble salt solution after 2 hours, rinses the surface with deionized water, and puts it in the dark for 24 hours. The surface of the separation layer has a transition metal infiltration layer. 3. Then conduct a gas permeation test.

Embodiment 2

[0024] On the support membrane porous polyetherimide ultrafiltration membrane, use the dipping coating method to coat the mass concentration of 6%PEBA2533, the solvent is butanol, the coating temperature is 50°C, and the drying time is 4h. The prepared composite membrane is dried in a vacuum oven. Dry at 30° C. for 24 h to remove the remaining solvent to form the separation layer 2 . Using the one-sided ligand solution exchange method, with 5.0M AgNO 3 The solution introduces transition metal ions into the separation layer of the composite membrane on one side, pours out the transition metal soluble salt solution after 2 hours, rinses the surface with deionized water, and puts it in the dark for 24 hours. The surface of the separation layer has a transition metal infiltration layer. 3. Then conduct a gas permeation test.

Embodiment 3

[0026] 6% PEBA2533 was coated on the support membrane porous polyetherimide ultrafiltration membrane by dip coating method, the solvent was butanol, the coating temperature was 50° C., and the drying time was 4 hours. The prepared composite membrane was dried in a vacuum oven at 30° C. for 24 hours to remove the remaining solvent to form the separation layer 2 . Using the one-sided ligand solution exchange method, use 1.0M AgBF 4The solution introduces transition metal ions into the separation layer of the composite membrane on one side, pours out the transition metal soluble salt solution after 2 hours, rinses the surface with deionized water, and puts it in the dark for 24 hours. The surface of the separation layer has a transition metal infiltration layer. 3. Then conduct a gas permeation test.

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Abstract

The invention relates to a separation membrane, in particular to a novel loaded transition metal composite membrane. A separation layer is compounded on a support layer which adopts a porous membrane or a microporous membrane; the separation layer adopts a polymeric material coating containing ether-oxygen bonds or ketonic oxygen; the upper surface of the separation layer is a transition metal infiltration layer which is contacted with the separation layer through transition metal soluble salt solution; the transition metal infiltration layer is formed by the matching of transition metal ionsand functional groups of the ether-oxygen bonds or ketonic oxygen in the separation layer material; the separation layer material contains the functional groups which can be matched with transition metal ion carriers; and through detection, in the novel loaded transition metal composite membrane, the transition metal ions are only introduced into the surface layer of the dense separation layer atthe thickness of 1-300nm, and olefin is promoted and transferred due to complexation of carrier ions to the olefin, thus improving the separation effect of the olefin / alkane.

Description

1. Technical field: [0001] The invention relates to a gas separation composite membrane, and also relates to a preparation method of the composite membrane. 2. Background technology: [0002] Olefins and alkanes are important raw materials for the chemical industry. In petrochemical processes such as thermal cracking and catalytic cracking, a large amount of olefin / alkane gas mixture is produced, and it is necessary to select an economical and energy-saving method to separate it. Due to the high energy consumption and low efficiency of separation methods such as traditional distillation and adsorption. Exploring efficient and energy-saving olefin / alkane separation methods has become one of the important topics in the field of petrochemical industry. [0003] With the continuous development of gas separation membrane technology, the separation of hydrocarbons by membrane method has attracted great attention of researchers. However, the gas permeability and olefin / alkane se...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D71/68
Inventor 任吉中王雁北邓麦村
Owner TIANBANG NAT ENG RES CENT OF MEMBRANE TECH
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