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Preparation method of separation membrane material polyvinylamine for capturing carbon dioxide

A technology based on polyvinylamine and carbon dioxide, applied in separation methods, chemical instruments and methods, and semipermeable membrane separation, can solve problems such as low permeation selectivity and few functional groups in separation membrane materials, and achieve excellent permeation selectivity , Excellent CO2 permeation rate, excellent performance effect

Inactive Publication Date: 2019-01-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CO above 2 Separation membrane materials have fewer functional groups and lower permeation selectivity, and are currently used for CO 2 / N 2 The permeation rate of the separation composite membrane is 30-50GPU, and the separation factor is 20-40

Method used

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  • Preparation method of separation membrane material polyvinylamine for capturing carbon dioxide
  • Preparation method of separation membrane material polyvinylamine for capturing carbon dioxide
  • Preparation method of separation membrane material polyvinylamine for capturing carbon dioxide

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preparation example Construction

[0024] One for capturing CO 2 The preparation method of separation membrane material polyvinylamine, the steps are as follows:

[0025] 1) N-vinyl formamide (NVF) with a purity of 99% is configured into an aqueous solution with a concentration of 20 to 50 wt%, and the concentration of the initiator azobisisobutylamidine hydrochloride (AIBA) is 0.038 to 0.6 mg / L, add to the reaction device after stirring evenly, N 2 Polymerization at a constant temperature of 50-70°C under protection for 4-10 hours;

[0026] 2) Add excessive hydrochloric acid solution, fully carry out hydrolysis reaction;

[0027] 3) Add the hydrolyzed polymer solution dropwise to excess ethanol, and obtain PVAm.HCl (polyvinylamine hydrochloride) through ethanol precipitation;

[0028] 4) Dissolve the obtained precipitate with deionized water to prepare a 2wt% aqueous solution, then add an excessive amount of anion exchange resin, stir evenly, the solution is found to be alkaline, and filter it with a G3 gl...

Embodiment 1

[0031] 0.11kg of NVF with a purity of 99% is configured into an aqueous solution with a concentration of 20wt% at room temperature, and the concentration of the initiator azobisisobutylamidine hydrochloride (AIBA) is 0.6mg / L. After stirring evenly, add it to a 3L reactor device , N 2 Polymerize at a constant temperature of 70°C under protection for 4 hours; add excess hydrochloric acid solution to fully hydrolyze; add the hydrolyzed polymer solution dropwise to excess ethanol, and obtain PVAm.HCl by ethanol precipitation; then use deionized Dissolve in water and make 2wt% aqueous solution, then add excess strong basic styrene-type anion exchange resin, stir evenly, measure the solution is alkaline (pH=10), filter with G3 glass sand core funnel, get 2wt% PVAm aqueous solution.

[0032] The 1wt% PVAm aqueous solution is scrape-coated on the polysulfone ultrafiltration membrane, and the obtained membrane is dried under constant temperature and humidity to obtain a high-performan...

Embodiment 2

[0035] 0.12kg of NVF with a purity of 99% is configured into an aqueous solution with a concentration of 20wt% at room temperature, and the concentration of the initiator azobisisobutylamidine hydrochloride (AIBA) is 0.076mg / L. After stirring evenly, add it to a 3L reactor device , N2 Polymerization at a constant temperature of 70°C under protection for 4 hours. Add excess hydrochloric acid solution, fully hydrolyzed. Add the hydrolyzed polymer solution dropwise to excess ethanol, and obtain PVAm.HCl through ethanol precipitation. Then the precipitate obtained is dissolved in deionized water and is mixed with a 2wt% aqueous solution, then an excessive amount of anion exchange resin (strongly basic styrene type anion exchange resin) is added, stirred evenly, and the solution is alkaline (pH = 10.3), filter with G3 glass sand core funnel to obtain 2wt% PVAm aqueous solution.

[0036] The 1wt% PVAm aqueous solution is scrape-coated on the polysulfone ultrafiltration membrane, a...

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Abstract

The present invention relates to a preparation method of a separation membrane material polyvinylamine for capturing carbon dioxide. According to the present invention, high molecular weight PVAm is obtained by adjusting the initiator concentration, the monomer concentration, the polymerization temperature and the polymerization time of a polymerization reaction, a polysulfone ultra-filtration membrane is coated with the high molecular weight PVAm in a scrape coating manner, and a high-performance CO2 separation composite membrane is prepared by using the polysulfone ultra-filtration membranecoated with the high molecular weight PVAm as a separation layer material, wherein the prepared membrane is flat and smooth; the preparation process of high molecular weight PVAm can be used for scale-up production, and can provide the raw material for the batch preparation of CO2 separation composite membrane separation layers, the preparation method of the CO2 separation composite membrane is simple, and the the CO2 separation composite membrane has excellent performance; and the results of the mixed gas (CO2 / N2 15 / 85) tests on the prepared CO2 separation composite membrane show that the CO2permeation rate achieves more than 300 GPU, and the CO2 / N2 separation factor achieves more than 50.

Description

technical field [0001] The invention belongs to the field of preparation of gas separation membrane materials; it relates to a process for preparing key materials of separation membranes through multi-level optimization such as comprehensive regulation of groups, molecules and aggregation states to obtain high-molecular-weight key materials polyvinylamine, especially polyvinylamine for use in The invention discloses a preparation method of polyvinylamine, a carbon dioxide separation membrane material. Background technique [0002] With the development of economic globalization, environmental issues and energy issues have become urgent problems in economic development. The combustion of traditional fossil fuels such as coal and oil has brought serious environmental pollution problems. CO 2 A large amount of emissions cause global climate change and damage to ecosystems. CO 2 Emission reduction has become a major global issue. Currently common CO 2 Separation techniques ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D71/62B01D67/00B01D53/22
CPCB01D53/228B01D67/0002B01D69/12B01D71/62B01D2257/504Y02C20/40
Inventor 王志许瑞原野董松林王纪孝
Owner TIANJIN UNIV
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