Pervaporation separation of ethanol-water mixtures using polyethylenimine composite membranes

Title: Pervaporation separation of ethanol-water mixtures using polyethylenimine composite membranes

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Abstract

Synthetic, organic, polymeric membranes were prepared from polyethylenimine for use with pervaporation apparatus in the separation of ethanol-water mixtures. The polymeric material was prepared in dilute aqueous solution and coated onto a polysulfone support film, from which excess polymeric material was subsequently removed. Cross-links were then generated by limited exposure to toluene-2,4-diisocyanate solution, after which the prepared membrane was heat-cured. The resulting membrane structures showed high selectivity in permeating ethanol or water over a wide range of feed concentrations.

Inventors:: Neidlinger, H.H.; Schissel, P.O.; Orth, R.A.

Issue Date:: 1987-04-21

OSTI Identifier:: 7012203

Patent Number(s):: 4659590 A

Application Number:: PPN: US 6-746592

Assignee:: Dept. of Energy, Washington, DC (United States) PTO; EDB-94-122018

DOE Contract Number:: AC02-83CH10093

Resource Type:: Patent

Resource Relation:: Patent File Date: 19 Jun 1985

Country of Publication:: United States

Language:: English

Subject:: 10 SYNTHETIC FUELS; 09 BIOMASS FUELS; ETHANOL; MEMBRANE TRANSPORT; MEMBRANES; FABRICATION; POLYETHYLENES; SEPARATION PROCESSES; SUPPORTS; ALCOHOLS; HYDROXY COMPOUNDS; MECHANICAL STRUCTURES; ORGANIC COMPOUNDS; ORGANIC POLYMERS; POLYMERS; POLYOLEFINS; 100200* - Synthetic Fuels- Production- (1990-); 090900 - Biomass Fuels- Processing- (1990-)

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                    Neidlinger, H.H., Schissel, P.O., and Orth, R.A. Pervaporation separation of ethanol-water mixtures using polyethylenimine composite membranes.  United States: N. p., 1987. 
        Web.

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                    Neidlinger, H.H., Schissel, P.O., & Orth, R.A. Pervaporation separation of ethanol-water mixtures using polyethylenimine composite membranes.  United States.

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                    Neidlinger, H.H., Schissel, P.O., and Orth, R.A. Tue .  
        "Pervaporation separation of ethanol-water mixtures using polyethylenimine composite membranes".  United States.

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@article{osti_7012203,

  title        = {Pervaporation separation of ethanol-water mixtures using polyethylenimine composite membranes},

  author       = {Neidlinger, H.H. and Schissel, P.O. and Orth, R.A.},

  abstractNote = {Synthetic, organic, polymeric membranes were prepared from polyethylenimine for use with pervaporation apparatus in the separation of ethanol-water mixtures. The polymeric material was prepared in dilute aqueous solution and coated onto a polysulfone support film, from which excess polymeric material was subsequently removed. Cross-links were then generated by limited exposure to toluene-2,4-diisocyanate solution, after which the prepared membrane was heat-cured. The resulting membrane structures showed high selectivity in permeating ethanol or water over a wide range of feed concentrations.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1987},

  month        = {4}

}

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Pervaporation separation of ethanol-water mixtures using polyethylenimine composite membranes

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The method of separating which consists of an ethanol-water mixture through a membrane film, comprising: providing a polymeric membrane film having a first and second side and consisting essentially of ethylenimine polymers supported on a microporous member and having a partially cross-linked and heat-cured surface, the cross-linking having been achieved by the use of a cross-linking agent consisting essentially of an isocyanate compound; providing an ethanol-water feed solution on the first side of the membrane film; applying a pressure differential between the first and the second sides of the membrane film sufficient to induce a diffusion flow of a permeatemore »« less
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