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Hollow fiber oxygen separation membrane and method for preparing same

A technology of oxygen separation membrane and manufacturing method, which is applied in semipermeable membrane separation, chemical instruments and methods, membrane technology, etc., and can solve the problems that are difficult to apply to home users, noise produces moisture, oxygen production volume and oxygen production concentration are not enough, etc.

Inactive Publication Date: 2008-11-26
艾尓灵株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to obtain high pressure, an air compressor is required, and the air compressor has problems such as noise and moisture generation as the compression ratio increases, so it is difficult to apply to home users
The method of reducing the pressure difference between the upper and lower parts of the separation membrane and minimizing the generation of noise and water is to use vacuum, but if only using vacuum, the pressure difference cannot be increased to more than 1 atmosphere, and the efficiency is extremely low, resulting in Oxygen production amount and oxygen production concentration are not as good as when using the same separation membrane and air compressor

Method used

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  • Hollow fiber oxygen separation membrane and method for preparing same
  • Hollow fiber oxygen separation membrane and method for preparing same
  • Hollow fiber oxygen separation membrane and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] With the total amount of mixture 100% as a benchmark, the polysulfone ( 1700) slowly added to the N-methylpyrrolidone solvent accounting for 40% of the total weight, and as additives, respectively adding 20% ​​of the total weight of tetrahydrofuran and 18% of the total weight of ethanol, and uniformly mixed to form a solution. Under the conditions of normal temperature and reduced pressure for 24 hours, the air bubbles in the produced uniform spinning solution were removed, and foreign substances were removed using a 60 μm filter. Next, spinning was performed using a gear pump at 60°C. At this time, the air gap (air gap) was 10 cm, and the double spinneret was used to perform spinning using normal temperature water as the internal coagulation liquid, and the temperature of the external coagulation tank was set to 25°C and 45°C, respectively, and the phase inversion process was performed. , and then the hollow fiber was coiled and cut, and rinsed in running water for 5...

Embodiment 2

[0066] When manufacturing hollow fiber membranes, polysulfone ( 6010), used N-methylpyrrolidone as solvent, and other conditions were the same as example 1.

experiment example

[0070] The hollow fiber membranes manufactured by the above-mentioned Examples 1 and 2 and Comparative Example 1 were folded from the middle, arranged in multiple bundles in a cylinder, sealed with polyurethane resin, cut off the end part, and opened the opening of the hollow fiber again to manufacture Out of the hollow fiber oxygen separation membrane module, finally use 99.9% oxygen and nitrogen respectively, under the condition of 5 atmospheric pressure, it is suitable for three identical above-mentioned 3 kinds of hollow fiber oxygen separation membrane modules, according to the temperature of the non-solvent tank, measured the average oxygen and Nitrogen permeability and selectivity. Each hollow fiber module includes 3000 hollow fiber membranes with a surface area of ​​2.0m 2 . In the experiment, the gas permeability was measured using a mass flow meter, and the gas permeation unit was GPU (Gas Permeation Unit, 10 -6 ×cm 3 / cm 2 sec cmHg), the measurement results are...

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Abstract

The invention relates to hollow fiber oxygen separating film and a method for making the same. The method comprises spinning with high polymer spinning solution to make hollow fiber oxygen separating film. The invention is characterized in that: (A) having 20 to 30 weight percentage high polymer substances with selective permeation; (B) having 30 to 40 weight percentages solvent; and (C) after spinning with high polymer mixed solution of additive residue, depositing in non-solvent slot in 20 to 50 degree centigrade and forming film.

Description

technical field [0001] The present invention relates to a hollow fiber oxygen separation membrane and a manufacturing method thereof. More specifically, it relates to delaying phase separation relative to non-solvent permeation by reducing the concentration of polymer in a polymer spinning solution, and further by making the non-solvent tank Keep the temperature above normal temperature, increase the porosity, and minimize the resistance of the lower part of the membrane. It is suitable for small separation membrane systems operated by vacuum pumps. Background technique [0002] In the industrial field, it is a very important process to separate specific gas components from various gas components in the air. The techniques for separating gases include cryogenic method, pressure swing adsorption method, and membrane separation method. [0003] Among them, the main function of the gas separation membrane used in the membrane separation method is to separate and concentrate va...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/08
CPCB01D69/08B01D71/06B01D71/64B01D71/68
Inventor 河成龙高亨澈李忠燮金翰义
Owner 艾尓灵株式会社