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Preparation method of hollow polyimide fiber membrane applied to sulfide adsorption

A polyimide, fiber membrane technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve problems such as no adsorption effect of sulfides, no reports yet, and achieve cost Low cost, simple operation and simple preparation process

Inactive Publication Date: 2014-12-03
TIANJIN POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sulfides often exist in complex organic mixtures. The matrix material used for sulfide adsorption needs to have good solvent resistance. Polyimide has good solvent resistance, high temperature resistance and film-forming performance, and is an excellent separation agent with comprehensive performance. One of the membrane materials, but the polyimide separation membrane has no adsorption effect on sulfide. At present, the modified polyimide hollow fiber membrane is mainly used for gas separation, such as the polyimide hollow fiber membrane doped with porous particles, Its preparation method and application (CN 102418168A), but the research on polyimide hollow fiber membranes used for sulfide adsorption is rarely reported, especially the use of molecular sieves for the adsorption of sulfides to prepare polyimide hollow fiber membranes for sulfide adsorption. Research on fiber membranes has not been reported

Method used

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  • Preparation method of hollow polyimide fiber membrane applied to sulfide adsorption
  • Preparation method of hollow polyimide fiber membrane applied to sulfide adsorption

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Experimental program
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Effect test

Embodiment 1

[0019] (1) Preparation of spinning dope:

[0020] The polyimide matrix material was synthesized from two monomers, pyromellitic dianhydride and 4,4'-diaminodiphenyl ether. Before synthesis, the two monomer raw materials of pyromellitic dianhydride and 4,4'-diaminodiphenyl ether were put into a vacuum drying oven at 120°C for 24 hours, and the solvent N-methylpyrrolidone was removed with activated 3A molecular sieves. Water treatment, the treatment time is more than 24 hours. Take the dried 4,4'-diaminodiphenyl ether (6.01g, 30mmol) and dissolve it in N-methylpyrrolidone (69ml). After the 4,4'-diaminodiphenyl ether is completely dissolved, add Tetracarboxylic dianhydride (6.54 g, 30 mmol). After stirring and reacting at room temperature for 4 hours, a polyamic acid solution with a concentration of 15% by mass was obtained. Then add 9.3g of AgY molecular sieve, the mass percentage of molecular sieve is 10%, fully stir for more than 4 hours, and finally go through vacuum defoa...

Embodiment 2

[0026] (1) Preparation of spinning dope:

[0027] The polyimide matrix material was synthesized from two monomers, pyromellitic dianhydride and 4,4'-diaminodiphenyl ether. Before synthesis, the two monomer raw materials of pyromellitic dianhydride and 4,4'-diaminodiphenyl ether were put into a vacuum drying oven at 120°C for 24 hours, and the solvent N-methylpyrrolidone was removed with activated 3A molecular sieves. Water treatment, the treatment time is more than 24 hours. Take the dried 4,4'-diaminodiphenyl ether (6.01g, 30mmol) and dissolve it in N-methylpyrrolidone (49ml). After the 4,4'-diaminodiphenyl ether is completely dissolved, add Tetraformic dianhydride (6.54g, 30mmol) (note: add in several times, at least 3 times, to ensure full reaction of the monomer). After stirring and reacting at room temperature for 4 hours, a polyamic acid solution with a concentration of 20% by mass was obtained. Afterwards, 11.1 g of AgY molecular sieves were added, the mass percentag...

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Abstract

The invention belongs to the field of preparation and application of special separation membrane materials and provides a preparation method of a hollow polyimide fiber membrane applied to sulfide adsorption. The preparation method of the polyimide hollow fiber membrane applied to the sulfide adsorption comprises the following steps: dissolving dianhydride and diamine in a polar organic solution to prepare a polyamide acid solution, subsequently adding particles with an adsorption function to obtain a spinning raw solution; spinning the raw solution into a nascent hollow fiber membrane by virtue of dry and wet spinning processes; and finally carrying out thermal imidization treatment to obtain the hollow polyimide-based fiber membrane. The preparation method of the hollow polyimide fiber membrane applied to the sulfide adsorption is simple and easy in process, simple to operate, relatively low in cost and suitable for being used in large-scale industrial production; by virtue of desulfurization experiment testing, the adsorption capacity of the membrane can reach over 13.0mgS / g.

Description

technical field [0001] The invention belongs to the field of preparation and application of special separation membrane materials, and specifically relates to a polyimide hollow fiber membrane for sulfide adsorption and a manufacturing method thereof. The prepared hollow fiber membrane has good sulfide adsorption effect and can be used for Fuel oil desulfurization provides sulfur-free hydrogen source for fuel cells. Background technique [0002] Membrane separation technology has become an effective means to solve the major problems of energy, resources and environment faced by human beings. With the development of membrane material science and membrane separation technology at home and abroad, membrane technology has expanded from the initial field of water treatment to the precision separation and purification of food, medicine, chemical industry, energy and other fields, gradually replacing traditional distillation, adsorption, etc. Separation and purification methods. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/64B01D67/00B01J20/26B01J20/30B01J20/28
Inventor 林立刚张龙辉董美美刘春雨张潮魏晨杰王媛媛邓盼珊
Owner TIANJIN POLYTECHNIC UNIV
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