SUPERCRITICAL FLUID FRACTIONATION OF A NONIONIC SURFACTANT

被引：24

作者：

ECKERT, CA

EKART, MP

KNUTSON, BL

PAYNE, KP

TOMASKO, DL

LIOTTA, CL

FOSTER, NR

机构：

[1] GEORGIA INST TECHNOL, SCH CHEM, ATLANTA, GA 30332 USA

[2] UNIV NEW S WALES, SCH CHEM ENGN & IND CHEM, KENSINGTON, NSW 2033, AUSTRALIA

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 1992年 / 31卷 / 04期

关键词：

D O I：

10.1021/ie00004a019

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Supercritical fluid extraction (SFE) is demonstrated for the removal of unreacted dodecanol (lauryl alcohol) from nonionic surfactants (poly(oxyethylene) dodecyl ethers, C12En) 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 C12E1. Conclusions regarding the choice of solvent for specific separations are discussed.

引用

页码：1105 / 1110

页数：6