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PDMS-KIT-6 composite membrane for separating organic steam and preparation method thereof

A PDMS-KIT-6, KIT-6 technology, applied in the field of membrane separation, can solve the problems of low air permeability rate, low air permeability selectivity, and difficulty in ultra-thinning, and achieve low cost, uniform distribution, and good selective permeation sexual effect

Active Publication Date: 2015-08-26
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are low air permeability selectivity and difficulty in ultra-thinning
Although its diffusion coefficient is high, its application is limited due to the difficulty of ultra-thinning and the low air permeability.

Method used

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  • PDMS-KIT-6 composite membrane for separating organic steam and preparation method thereof
  • PDMS-KIT-6 composite membrane for separating organic steam and preparation method thereof
  • PDMS-KIT-6 composite membrane for separating organic steam and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation method of the present embodiment is realized like this, comprises the following steps:

[0031] (1) According to the literature (Kim, T.M.et al.J.Am.Chem.Soc., 2005, 127, 7601): Add 11.2g of HCL (37%) into 217mL of ultrapure water in a water bath at 35°C, and then Add 6g of polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (hereinafter referred to as P123), after P123 is completely dissolved, add 6g of n-butanol and 12.9g of tetraethyl orthosilicate (hereinafter referred to as TEOS), stirred vigorously for 24 hours, then transferred to a high-pressure reactor, and heated at 100°C for 24 hours. The obtained solid product was suction filtered, washed, and dried overnight at 100°C. Subsequently, the white powder was washed with ethanol and a small amount of hydrochloric acid at 60° C. for 12 h, filtered with suction, and dried overnight at room temperature after washing. Finally, it was calcined at 550°C for 4h (heating rate: 5°...

Embodiment 2

[0037] The preparation method of the present embodiment is realized like this, comprises the following steps:

[0038] (1) According to the literature (Kim, T.M.et al.J.Am.Chem.Soc., 2005, 127, 7601): Add 11.2g of HCL (37%) into 217mL of ultrapure water in a water bath at 35°C, and then Add 6g of P123, after the P123 is completely dissolved, add 6g of n-butanol and 12.9g of TEOS, stir vigorously for 24h, transfer to a high-pressure reactor, and heat at 100°C for 24h. The obtained solid product was suction filtered, washed, and dried overnight at 100°C. Subsequently, the white powder was washed with ethanol and a small amount of hydrochloric acid at 60° C. for 12 h, filtered with suction, and dried overnight at room temperature after washing. Finally, it was calcined at 550°C for 4h (heating rate: 5°C / min), and KIT-6 mesoporous molecular sieve material was finally obtained.

[0039] (2) The synthesized KIT-6 mesoporous molecular sieve was vacuum degassed at 150°C for 24 hours...

Embodiment 3

[0044]The preparation method of the present embodiment is realized like this, comprises the following steps:

[0045] (1) According to the literature (Kim, T.M.et al.J.Am.Chem.Soc., 2005, 127, 7601): Add 11.2g of HCL (37%) into 217mL of ultrapure water in a water bath at 35°C, and then Add 6g of P123, after the P123 is completely dissolved, add 6g of n-butanol and 12.9g of TEOS, stir vigorously for 24h, transfer to a high-pressure reactor, and heat at 100°C for 24h. The obtained solid product was suction filtered, washed, and dried overnight at 100°C. Subsequently, the white powder was washed with ethanol and a small amount of hydrochloric acid at 60° C. for 12 h, filtered with suction, and dried overnight at room temperature after washing. Finally, it was calcined at 550°C for 4h (heating rate: 5°C / min), and KIT-6 mesoporous molecular sieve material was finally obtained.

[0046] (2) The synthesized KIT-6 mesoporous molecular sieve was vacuum degassed at 150°C for 24 hours ...

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Abstract

The invention discloses a PDMS-KIT-6 composite membrane for separating organic steam and a preparation method thereof and belongs to the technical field of membrane separation. The preparation method comprises the following steps of synthesizing a KIT-6 mesoporous material with surface hydrophobicity, carrying out heating pre-treatment on a PVDF base membrane, dissolving a PDMS membrane liquid in n-heptane to obtain a uniform membrane preparation liquid, adding the KIT-6 mesoporous material into the uniform membrane preparation liquid according to different mass ratios, carrying out stirring and ultrasonic defoaming, coating the base membrane with the membrane liquid and carrying out curing at a certain temperature to obtain the PDMS-KIT-6 composite membrane. KIT-6 can be uniformly dispersed in PDMS and the separated layer is compact, has no detects and can be tightly bonded to the PVDF. The PDMS-KIT-6 composite membrane can be respectively used for separating n-butane and nitrogen, propylene and nitrogen, and acetone and nitrogen, has n-butane, propylene and acetone penetration coefficients of 9*10<14>cm<3> (STP) cm / (cm<2>.s.cmHg) or more and has a separation factor of more than 16.

Description

【Technical field】 [0001] The invention relates to a method for preparing a composite membrane used for organic vapor separation, and belongs to the technical field of membrane separation. 【Background technique】 [0002] During the storage and transportation of petrochemical, organic synthesis, and oil and gas, a large amount of volatile organic pollutants are often discharged into the air, which not only causes waste of organic matter, but also causes serious environmental pollution. Under the background of energy saving and emission reduction, the recovery of organic vapor becomes very necessary. [0003] At present, the traditional industrial organic vapor recovery technologies mainly include condensation method and adsorption-recovery method. Among them, the adsorption-recovery method is the earliest organic vapor separation method, which uses activated carbon to adsorb and purify waste gas, and then desorbs and regenerates with water vapor, which has a good treatment ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/70B01D71/02B01D69/12B01D67/00B01D53/22
Inventor 郝郑平王俊慧
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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