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Composite hollow fiber membrane and its preparation and application

A fiber composite, hollow technology, applied in membrane technology, semi-permeable membrane separation, chemical instruments and methods, etc., can solve problems such as large influence and difficulty, and achieve the effect of easy operation, easy control of conditions, and improved selective separation.

Inactive Publication Date: 2005-08-24
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is greatly affected by the solvent, and it is not easy to significantly improve the separation and permeability of the composite membrane without damaging the membrane structure.

Method used

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  • Composite hollow fiber membrane and its preparation and application
  • Composite hollow fiber membrane and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Collect 25 polysulfone hollow fiber asymmetric basement membranes with a monofilament size of 450 μm in outer diameter and 150 μm in inner diameter and 700 mm in length by dry-wet spinning into a bundle, fold them into a “U” shape, and cast the open end with epoxy resin basement membrane. Immerse the filaments in 150mL of PEO coating solution for 15 minutes to complete a coating process, and then dry and solidify naturally for 24 hours after the filaments are taken out. The composition of the PEO coating solution is 0.1wt% PEO, 0.5mL organosilane coupling agent γ-aminopropyltriethoxysilane KH-550, 0.4mL polymer plasticizer dioctyl phthalate DOP, and the rest for H 2 O. Under the conditions of 30°C and 0.5MPa raw material gas, pure H was measured on a self-made evaluation device 2 , pure N 2 The gas permeation rate J through the membrane H2 、J N2 , and calculate the gas ideal separation coefficient α H2 / N2 =J H2 / J N2 . Measured J H2 5.57×10 -5 cm 3 (STP) / cm...

Embodiment 2

[0035] The production and testing methods of the base film are the same as in Example 1. The tow is immersed in 150 mL of polyvinylpyrrolidone PVP coating liquid for 30 minutes to complete a coating process. The composition of the PVP coating solution is 0.5wt% PVP, 0.5mL γ-aminopropyltriethoxysilane KH-550, 0.4mL polymer plasticizer dioctyl phthalate DOP, and the rest is H 2 O. After the silk was taken out, it was naturally dried and solidified for 24 hours, and the measured J H2 7.85×10 -5 cm 3 (STP) / cm 2 s cmHg, α H2 / N2 is 16.1, relative to the basement membrane α H2 / N2 There is improvement.

Embodiment 3

[0037] The production and testing methods of the base film are the same as in Example 1. The tow is immersed in 150 mL of polyvinyl alcohol PVA coating liquid for 30 minutes to complete a coating process. The composition of PVA coating liquid is 0.5wt%PVA, 0.5mLγ-aminopropyltriethoxysilane KH-550, 0.4mL polymer plasticizer dioctyl phthalate DOP, and the rest is H 2 O. After the silk was taken out, it was naturally dried and solidified for 24 hours, and the measured J H2 is 6.09×10 -5 cm 3 (STP) / cm 2 s cmHg, α H2 / N2 is 19.9, relative to the basement membrane α H2 / N2 There is improvement.

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Abstract

A composite hollow fibre membrane based on the composite resistance Henis membrane model (silica rubber / polysulfone membrane) for separating H2 or N2 with high effect is composed of basic membrane, water-soluble high-molecular layer in rubber state at ordinary temp and silica rubber layer. It can be used for the ammonia synthesizing plant or oil refinary to recover N2 or H2. Its preparing process is also disclosed.

Description

Technical field: [0001] The invention relates to membrane technology, and in particular provides a hollow fiber composite membrane with secondary coating, a preparation method and application. Background technique: [0002] Hydrogen will play an increasingly important role in the energy and petrochemical fields in the 21st century. At present, there are two main methods to obtain hydrogen sources: one is to use petroleum or coal to produce (including steam reforming hydrogen production, gas partial oxidation hydrogen production, Topsoe hydrogen production, etc.), the cost is very high, and the production of 1 ton Hydrogen needs to consume 4-5 tons of petroleum. The other is to use new technologies to recover hydrogen from various hydrogen-containing waste gases, such as membrane hydrogen recovery technology. The latter category will be an effective way for the oil refining industry to obtain cheap hydrogen sources. [0003] Compared with traditional separation technology, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/08B01D69/12
Inventor 叶震陈勇邓麦村陈兆安李晖张桂花刘桂香贺高红吴鸣
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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