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Preparation device and method for environmentally-friendly composite membrane with preferential alcohol permeability performance

An alcohol-preferential and environmentally friendly technology, applied in the field of membrane separation, can solve problems such as pollution, explosiveness, and corrosion, and achieve the effect of improving the permeation flux

Active Publication Date: 2014-04-09
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polymer used to prepare ethanol is usually accompanied by the pollution of toxic solvents. For example, solvents such as n-heptane and n-pentane, which are commonly used in polydimethylsiloxane, are poisonous, corrosive, and explosive. The equipment has strong damage, and it is not conducive to amplifying production

Method used

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  • Preparation device and method for environmentally-friendly composite membrane with preferential alcohol permeability performance
  • Preparation device and method for environmentally-friendly composite membrane with preferential alcohol permeability performance
  • Preparation device and method for environmentally-friendly composite membrane with preferential alcohol permeability performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The support body is polysulfone (PS) material, flat ultrafiltration membrane, the pure water flux is 300LMH / bar, and the membrane area is 92cm 2 , the polymer material used is polydimethylsiloxane (PDMS, viscosity 100Pa·S), the crosslinking agent is tetraethyl orthosilicate (TEOS, molecular weight 208), and the catalyst is dibutyltin dilaurate ( Molecular weight is 631). Polydimethylsiloxane is insoluble in the solvent, and the solvent of ethyl orthosilicate and dibutyltin dilaurate is ethanol. The experiments were carried out in a constant temperature and humidity laboratory, the temperature was kept at 20°C, and the humidity was kept at 20%. Crosslinking temperature 100°C, 15h.

[0042] Assembly conditions and methods:

[0043] (1) Let the polydimethylsiloxane stand and defoam to form an alcohol-permeable material solution. Add 0.015wt% dibutyltin dilaurate to ethyl orthosilicate with ethanol to form 1000ml of a 20wt% solution, stir and ultrasonically defoam to be...

Embodiment 2

[0056] The support body is polysulfone (PS) material, flat ultrafiltration membrane, the pure water flux is 300LMH / bar, and the membrane area is 92cm 2 , the polymer material used is polydimethylsiloxane (PDMS, viscosity 100Pa·S), the crosslinking agent is tetraethyl orthosilicate (TEOS, molecular weight 208), and the catalyst is dibutyltin dilaurate ( Molecular weight is 631). Polydimethylsiloxane is insoluble in the solvent, and the solvent of ethyl orthosilicate and dibutyltin dilaurate is ethanol. The experiments were carried out in a constant temperature and humidity laboratory, the temperature was kept at 20°C, and the humidity was kept at 20%. Crosslinking temperature 100°C, 15h.

[0057] Assembly conditions and methods:

[0058] (1) Let the polydimethylsiloxane stand and defoam to form an alcohol-permeable material solution. Add 0.015wt% dibutyltin dilaurate to ethyl orthosilicate with ethanol to form 1000ml of a 20wt% solution, stir and ultrasonically defoam to be...

Embodiment 3

[0070] The support body is polysulfone (PS) material, flat ultrafiltration membrane, the pure water flux is 300LMH / bar, and the membrane area is 92cm 2 , the polymer material used is polydimethylsiloxane (PDMS, viscosity 100Pa·S), the crosslinking agent is tetraethyl orthosilicate (TEOS, molecular weight 208), and the catalyst is dibutyltin dilaurate ( Molecular weight is 631). Polydimethylsiloxane is insoluble in the solvent, and the solvent of ethyl orthosilicate and dibutyltin dilaurate is ethanol. The experiments were carried out in a constant temperature and humidity laboratory, the temperature was kept at 20°C, and the humidity was kept at 20%. Crosslinking temperature 100°C, 15h.

[0071] Assembly conditions and methods:

[0072] (1) Let the polydimethylsiloxane stand and defoam to form an alcohol-permeable material solution. Add 0.015wt% dibutyltin dilaurate to ethyl orthosilicate with ethanol to form 1000ml of a 20wt% solution, stir and ultrasonically defoam to be...

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Abstract

The invention provides a preparation device and a method for an environmentally-friendly composite membrane with preferential alcohol permeability performance, and belongs to the membrane separation technology field. The preparation device comprises an air compressor, a filtration pressure-reducing valve, a triple valve, an atomizing nozzle, a solenoid valve, a loading tray, a baking lamp, a PLC controller, a low speed motor and a diaphragm pump. The solenoid valve control opening and closing of the atomizing nozzle. Polymers with a low viscosity are assembled on a basic membrane surface directly through pressure spraying in a solvent-free state, and furthermore, cross-linking agents and catalysts are sprayed in environmentally-friendly solvents, and therefore a composite separation membrane with a preferential alcohol permeability performance. The technology is simple and the composite membrane is environmentally friendly.

Description

technical field [0001] The invention relates to a preparation device and method of an environment-friendly and alcohol-preferred composite membrane, belonging to the technical field of membrane separation. Background technique [0002] Under the dual pressure of energy crisis and environmental pollution, fuel ethanol, as a renewable and clean energy, has attracted widespread attention. There is only less than 10% dilute ethanol solution in the fermentation broth for producing fuel ethanol, and ethanol as a reaction product can inhibit the reaction and reduce production efficiency. Pervaporation technology removes ethanol from the fermentation broth in situ, which has the advantages of no pollution and low energy consumption, and can effectively replace the traditional high-pollution, high-energy consumption distillation and rectification process, and the development of high-performance alcohol-preferential pervaporation membranes is one of them. The essential. On the basis...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D71/68B01D67/00
Inventor 纪树兰王任张国俊闫浩
Owner BEIJING UNIV OF TECH
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