Supercritical Fluid Fractionation of a Nonionic Surfactant

Charles A. Eckert; Michael P. Ekart; Barbara L. Knutson; Kirk P. Payne; David L. Tomasko; Charles L. Liotta; Neil R. Foster

doi:10.1021/ie00004a019

Supercritical Fluid Fractionation of a Nonionic Surfactant

Charles A. Eckert, Michael P. Ekart, Barbara L. Knutson, Kirk P. Payne, David L. Tomasko, Charles L. Liotta, Neil R. Foster

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

Supercritical fluid extraction (SFE) is demonstrated for the removal of unreacted dodecanol (lauryl alcohol) from nonionic surfactants (poly(oxyethylene) dodecyl ethers, C₁E_n) and fractionation based on polymer chain length. Carbon dioxide, pure and with 1.0 and 3.5 mol % methanol cosolvent, propane, and ammonia were used as supercritical solvents. Experimental solvent loadings and distribution coefficients were used to develop a batch extraction model and continuous stagewise extraction model. Propane and ammonia exhibited higher loadings while the CO₂/methanol mixtures showed greater selectivity for removing the dodecanol and C₁E₁. Conclusions regarding the choice of solvent for specific separations are discussed.

Original language	English
Pages (from-to)	1105-1110
Number of pages	6
Journal	Industrial and Engineering Chemistry Research
Volume	31
Issue number	4
DOIs	https://doi.org/10.1021/ie00004a019
State	Published - 1992

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

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title = "Supercritical Fluid Fractionation of a Nonionic Surfactant",

abstract = "Supercritical fluid extraction (SFE) is demonstrated for the removal of unreacted dodecanol (lauryl alcohol) from nonionic surfactants (poly(oxyethylene) dodecyl ethers, C1En) and fractionation based on polymer chain length. Carbon dioxide, pure and with 1.0 and 3.5 mol % methanol cosolvent, propane, and ammonia were used as supercritical solvents. Experimental solvent loadings and distribution coefficients were used to develop a batch extraction model and continuous stagewise extraction model. Propane and ammonia exhibited higher loadings while the CO2/methanol mixtures showed greater selectivity for removing the dodecanol and C1E1. Conclusions regarding the choice of solvent for specific separations are discussed.",

author = "Eckert, {Charles A.} and Ekart, {Michael P.} and Knutson, {Barbara L.} and Payne, {Kirk P.} and Tomasko, {David L.} and Liotta, {Charles L.} and Foster, {Neil R.}",

year = "1992",

doi = "10.1021/ie00004a019",

language = "English",

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TY - JOUR

T1 - Supercritical Fluid Fractionation of a Nonionic Surfactant

AU - Eckert, Charles A.

AU - Ekart, Michael P.

AU - Knutson, Barbara L.

AU - Payne, Kirk P.

AU - Tomasko, David L.

AU - Liotta, Charles L.

AU - Foster, Neil R.

PY - 1992

Y1 - 1992

N2 - Supercritical fluid extraction (SFE) is demonstrated for the removal of unreacted dodecanol (lauryl alcohol) from nonionic surfactants (poly(oxyethylene) dodecyl ethers, C1En) and fractionation based on polymer chain length. Carbon dioxide, pure and with 1.0 and 3.5 mol % methanol cosolvent, propane, and ammonia were used as supercritical solvents. Experimental solvent loadings and distribution coefficients were used to develop a batch extraction model and continuous stagewise extraction model. Propane and ammonia exhibited higher loadings while the CO2/methanol mixtures showed greater selectivity for removing the dodecanol and C1E1. Conclusions regarding the choice of solvent for specific separations are discussed.

AB - Supercritical fluid extraction (SFE) is demonstrated for the removal of unreacted dodecanol (lauryl alcohol) from nonionic surfactants (poly(oxyethylene) dodecyl ethers, C1En) and fractionation based on polymer chain length. Carbon dioxide, pure and with 1.0 and 3.5 mol % methanol cosolvent, propane, and ammonia were used as supercritical solvents. Experimental solvent loadings and distribution coefficients were used to develop a batch extraction model and continuous stagewise extraction model. Propane and ammonia exhibited higher loadings while the CO2/methanol mixtures showed greater selectivity for removing the dodecanol and C1E1. Conclusions regarding the choice of solvent for specific separations are discussed.

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JO - Industrial and Engineering Chemistry Research

JF - Industrial and Engineering Chemistry Research

IS - 4

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Supercritical Fluid Fractionation of a Nonionic Surfactant

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