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Preparation of intercrossed network water dealcoholizing pervaporation membrane

A technology of pervaporation membrane and interpenetrating network is applied in the field of preparation of water dealcohol pervaporation membrane, which can solve the problems of poor film-forming property of cross-linked membrane, reduced separation factor, low cross-linking degree, etc., and achieves good film-forming property, The effect of good separation performance and simple process

Active Publication Date: 2008-10-08
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the above-mentioned polymer membrane is that the membrane is prone to swelling due to the low degree of cross-linking, thereby reducing the separation factor.
Therefore, the use of a single polymer to prepare a cross-linked film has poor film-forming properties, poor stability, and a relatively low separation factor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1, the preparation method of interpenetrating network water dealcoholization pervaporation membrane, carry out the following steps successively:

[0027] 1), Equipped with film-making materials:

[0028] 1 part of silicalite-1 type hydrophobic zeolite, 0.1 part of azobisisobutyronitrile, 78.9 parts of n-hexane, 5 parts of terminated hydroxymethyl polydimethylsiloxane (molecular weight 3500), 5 parts of terminated methyl acrylate polydimethyl After 15 parts of siloxane (molecular weight: 4500) were uniformly mixed at 25°C, a film-making material was formed.

[0029] 2), cross-linking to form an interpenetrating network:

[0030] Add 0.1 part of dibutyltin dilaurate to the above 100 parts of film-making material, stir at 25°C for 10-20 hours; then add 0.5 part of divinylbenzene and 0.1 part of tetraethoxy The silane crosslinking reaction takes 2 to 6 hours to obtain the casting solution.

[0031] 3), scraping film and post-processing:

[0032] Pour the cast...

Embodiment 2

[0034] Embodiment 2, the preparation method of interpenetrating network water dealcoholization pervaporation membrane, the following steps are carried out in sequence:

[0035] 1), Equipped with film-making materials:

[0036]Put 2 parts of carbon black, 0.2 parts of azobisisobutyronitrile, 77.8 parts of n-hexane, 10 parts of cross-linked polybutadiene, and 10 parts of vinyl-terminated polydiphenylsiloxane (molecular weight: 5000) at 25°C After uniform mixing, the film-making material is formed.

[0037] 2), cross-linking to form an interpenetrating network:

[0038] Add 0.1 part of monobutyltin oxide to the above 100 parts of film-making material, stir at 25 °C for 10 to 20 hours; then add 0.5 part of divinylbenzene and 0.1 part of tetraethoxysilane at 60 °C Combined reaction for 2 to 6 hours to obtain casting solution.

[0039] 3), scraping film and post-processing:

[0040] Pour the casting solution on the flat plate, and scrape the film with a scraper knife; after dryi...

Embodiment 3

[0042] Example 3, the preparation method of interpenetrating network water dealcoholization pervaporation membrane, the following steps are carried out in sequence:

[0043] 1), Equipped with film-making materials:

[0044] Mix 1 part of ZSM-5 zeolite, 0.1 part of azobisisoheptanonitrile, 68.9 parts of toluene, 15 parts of hydroxymethyl polydimethylsiloxane, and 15 parts of methyl methacrylate at 25 ° C , forming a film-making material.

[0045] 2), cross-linking to form an interpenetrating network:

[0046] Add 0.3 parts of dibutyltin oxide to the above 100 parts of film-making material, stir at 25°C for 10 to 20 hours; then add 0.3 parts of divinyldimethylsiloxane and 0.1 part of The ethoxysilane cross-linking reaction takes 2 to 6 hours to obtain the casting solution.

[0047] 3), scraping film and post-processing:

[0048] Pour the casting solution on the flat plate, and scrape the film with a scraper knife; after drying in the air for 24 hours, an interpenetrating net...

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Abstract

The invention discloses a preparation method for an interpenetrating network dealcoholization pervaporation membrane, which includes the following steps: 1) preparing membrane producing materials: mixing well an inorganic additive, an evocating agent, a solution and a component I and a component II constituting the interpenetrating network to form the membrane producing materials; 2) the interpenetrating network is formed through cross bonding: adding catalyst in the membrane producing materials and mixing at a temperature ranging from 20 DEG C to 30 DEG C for 10 to 20 hours, and then adding a cross linker to mix and perform cross linking reaction at a temperature ranging from 50 DEG C to 70 DEG C for 2 to 6 hours, thus acquiring a casting solution; 3) membrane casting and post treatment: carrying out membrane casting and post treatment of the casting solution, thus acquiring the interpenetrating network dealcoholization pervaporation membrane. The interpenetrating network dealcoholization pervaporation membrane with hydrophobic nature prepared by the method of the invention is characterized by strong swelling resistance ability, high separation factor and so on.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and in particular relates to a preparation method of a water dealcoholization pervaporation membrane. Background technique [0002] Because of its renewable and non-polluting properties, fuel ethanol is considered to be the most promising new energy source that can replace heavily polluting and non-renewable energy sources such as petroleum and coal. [0003] At present, in the process of preparing fuel ethanol by fermentation of agricultural products, there is a common problem that the fermentation capacity will be reduced when the concentration of ethanol in the fermentation liquid reaches a certain concentration. It is a practical way to separate ethanol from fermentation broth by pervaporation technology to maintain the continuity of fermentation process. Chinese patent (Patent No. CN1450166A) reports a method for preparing absolute ethanol by biomass fermentation and pervaporati...

Claims

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Application Information

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IPC IPC(8): B01D71/70
Inventor 张林张红漫黄和白云翔陈欢林
Owner CHINA PETROLEUM & CHEM CORP
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