Method for preparing polyethersulfone hollow fiber gas separation membrane

A technology of gas separation membrane and polyethersulfone, which is applied in the field of membrane separation, can solve the problems of limited application range and high selectivity of hollow fiber membranes, and achieve the effects of high gas selective separation performance, easy operation, and simple preparation

Inactive Publication Date: 2019-05-28
道和矿冶科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are many reports on the use of polyethersulfone hollow fibers for gas separation, and according to the prior art, the temperature of the coagulation bath used in the spinning process of polyethersulfone hollow fibers is generally normal temperature (25 ° C), so that the obtained hollow fibers It is difficult for the membrane to maintain high selectivity of oxygen and nitrogen, carbon dioxide and nitrogen, and carbon dioxide and methane at the same time, and the application range is greatly limited

Method used

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  • Method for preparing polyethersulfone hollow fiber gas separation membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1. Add 28 grams of polyethersulfone, 57 grams of N-methylpyrrolidone, and 15 g of diethylene glycol into a container with a stirrer, stir at room temperature to make it fully dissolve, and filter and defoam to form a spinning stock solution .

[0034] Two concentric hollow fiber spinnerets are used to filter the raw spinning fluid and extrude through the spinnerets with a metering pump; the extrusion speed of the spinning solution is 3ml / min; the as-spun fibers pass through a distance of 3cm in the air Solidified and formed in a water bath at a temperature of 7°C; the winding speed of the winding wheel was 8m / min to obtain a polyethersulfone hollow fiber gas separation membrane.

[0035] The outer diameter of the fiber is 570 μm and the inner diameter is 280 μm. The membrane module made of post-treated polyethersulfone hollow fiber has a selectivity of 7 for oxygen and nitrogen, 47 for carbon dioxide and nitrogen, and 40 for carbon dioxide and methane.

Embodiment 2

[0036] Example 2. Add 28 grams of polyethersulfone, 55 grams of N-methylpyrrolidone, and 17 g of diethylene glycol into a container with a stirrer, stir at room temperature to make it fully dissolve, and filter and defoam to form a spinning stock solution .

[0037] Two concentric hollow fiber spinnerets are used to filter the raw spinning fluid and extrude through the spinnerets with a metering pump; the extrusion speed of the spinning solution is 3ml / min; the as-spun fibers pass through a distance of 3cm in the air Solidified and formed in a water bath at a temperature of 6°C; the winding speed of the winding wheel was 8m / min to obtain a polyethersulfone hollow fiber gas separation membrane.

[0038] The outer diameter of the fiber is 670 μm and the inner diameter is 300 μm. The membrane module made of post-treated polyethersulfone hollow fiber has a selectivity of 5 for oxygen and nitrogen, 40 for carbon dioxide and nitrogen, and 30 for carbon dioxide and methane.

Embodiment 3

[0039] Example 3: Add 30 grams of polyethersulfone, 55 grams of N-methylpyrrolidone, and 15 grams of diethylene glycol into a container with a stirrer, stir at room temperature to fully dissolve, and filter and defoam into a spinning stock solution .

[0040] Two concentric hollow fiber spinnerets are used to filter the raw spinning fluid and extrude through the spinnerets with a metering pump; the extrusion speed of the spinning solution is 3ml / min; the as-spun fibers pass through a distance of 3cm in the air, Solidified and formed in a water bath at a temperature of 6°C; the winding speed of the winding wheel was 8m / min to obtain a polyethersulfone hollow fiber gas separation membrane.

[0041] The outer diameter of the fiber is 660 μm and the inner diameter is 240 μm. The membrane module made of post-treated polyethersulfone hollow fiber has a selectivity of 6 for oxygen and nitrogen, 34 for carbon dioxide and nitrogen, and 22 for carbon dioxide and methane.

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Abstract

The invention discloses a method for preparing a polyethersulfone hollow fiber gas separation membrane. The method comprises the steps that first, raw material components for preparing a hollow fiberspinning solution are added to a container containing a stirrer in a certain proportion, uniform stirring is performed at a room temperature, then filtration and defoaming are performed, and the spinning solution is obtained; the obtained spinning solution is extruded out by a metering pump through two concentric hollow fiber spinning nozzles, primary fibers are solidified and formed in a water bath with a low temperature of 1-12 DEG C after passing through a distance of 1-20 cm in the air, and then the primary fibers are drawn and wound by a silk take-up reel, and hollow fibers are obtained;and the obtained hollow fiber are washed with water for 2-4 days, and then subjected to solvent exchange and drying to obtain the hollow fiber gas separation membrane. The method is simple in preparation, easy in operation, high in gas preferential segregation and easy in realization of industrialization.

Description

technical field [0001] The invention relates to the technical field of membrane separation, in particular to a preparation method of a polyethersulfone hollow fiber gas separation membrane. Background technique [0002] Polyethersulfone (PES), also known as polyphenylene ether sulfone or polyarylethersulfone, is a thermoplastic polymer material with excellent comprehensive performance. It is one of the few special engineering plastics currently used. It is known as The first special engineering plastic that combines high heat distortion temperature, high impact strength and excellent formability. [0003] There are many reports on the use of polyethersulfone hollow fibers for gas separation, and according to the prior art, the temperature of the coagulation bath used in the spinning process of polyethersulfone hollow fibers is generally normal temperature (25 ° C), so that the obtained hollow fibers It is difficult for the membrane to maintain high selectivity of oxygen and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D69/08B01D53/22D01F6/94D01F1/08
Inventor 侯峰
Owner 道和矿冶科技(北京)有限公司
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