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Composite hollow fiber membrane and its preparation and application

A fiber composite and composite membrane technology, which is applied in membrane technology, semipermeable membrane separation, chemical instruments and methods, etc., can solve problems such as difficulty and large impact, and achieve the effect of easy control of conditions, easy operation, and improved separation coefficient

Inactive Publication Date: 2007-05-30
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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Combine 25 polysulfone hollow fiber asymmetric base membranes with a monofilament size of 450μm in outer diameter, 150μm in inner diameter and 700mm in length by dry-wet spinning into a bundle, folded into a "U" shape, and the open end is cast with epoxy resin Make the base film. The tow is immersed in 150 mL of PEO coating solution for 15 minutes to complete a coating process. After the silk is taken out, it is naturally dried and cured for 24 hours. The composition of 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. Measure pure H on a self-made evaluation device under the condition of 30℃ and raw gas 0.5MPa 2 , Pure N 2 Gas permeation rate through membrane J H2 , J N2 , And calculate the ideal gas separation coefficient α H2 / N2 =J H2 / J N2 . Measured J H2 5.57×10 -5 cm 3 (STP) / cm 2 ·S·cmHg, α H2 / N2 Is 42.3, relative to the basement membrane α...

Embodiment 2

[0035] The base film production and test methods were the same as in Example 1. The tow was immersed in 150 mL of polyvinylpyrrolidone PVP coating solution for 30 minutes to complete a coating process. The composition of the PVP coating solution is 0.5wt% PVP, 0.5mL γ-aminopropyl triethoxysilane KH-550, 0.4mL polymer plasticizer dioctyl phthalate DOP, and the rest is H 2 O. After the silk is taken out, it will naturally dry and solidify for 24 hours, and the measured value is 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 base film production and test methods were the same as in Example 1. The tow was immersed in 150 mL of polyvinyl alcohol PVA coating solution for 30 minutes to complete a coating process. The composition of the PVA coating solution is 0.5wt% PVA, 0.5mL γ-aminopropyltriethoxysilane KH-550, 0.4mL polymer plasticizer dioctyl phthalate DOP, and the rest is H 2 O. After the silk is taken out, it will naturally dry and solidify for 24 hours, and the measured value is J H2 6.09×10 -5 cm 3 (STP) / cm 2 ·S·cmHg, α H2 / N2 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 secondary-coated hollow fiber composite membrane, a preparation method and an 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 for obtaining hydrogen sources: one is to use petroleum or coal to produce (hydrogen steam reforming, partial oxidation of gas, hydrogen production by Topsoe method, etc.). The cost is very high, and the production is 1 ton. Hydrogen needs to consume 4 to 5 tons of petroleum. The other is the use of new technologies to recover hydrogen from various hydrogen-containing waste gases, such as membrane hydrogen recovery technology. The latter will be an effective method for the oil refining industry to obtain cheap hydrogen sources. [0003] Compared with traditional separation technology, membrane separation technology h...

Claims

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Application Information

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Patent Type & Authority Patents(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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