Desorption of ethyl acetate from adsorbent surfaces (organoclays) by supercritical carbon dioxide

被引：17

作者：

Coelho, GLV ^{[1
]}

Augusto, F ^{[1
]}

Pawliszyn, J ^{[1
]}

机构：

[1] Univ Waterloo, Dept Chem, Waterloo, ON N2L 3G1, Canada

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2001年 / 40卷 / 01期

关键词：

D O I：

10.1021/ie000433a

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Supercritical fluid extraction was used to regenerate organically modified montimorillonite-clay (hexadecyltrimethylammonium-clay and tetramethylammonium-clay), after it was used to adsorb ethyl acetate from aqueous solutions. The desorption of ethyl acetate adsorbed over the clays was performed with CO2 at temperatures ranging from 301 to 333 K and pressures ranging from 69.0 to 413.8 bar. A crossover effect was observed. The experimental data was fitted to a simple model, with the best results corresponding to desorption with CO2 in its supercritical region.

引用

页码：364 / 368

页数：5

共 20 条

[11] Organic cosolvent effects or sorption equilibrium at hydrophobic organic chemicals by organoclays [J].

Nzengung, VA ;

Voudrias, EA ;

NkediKizza, P ;

Wampler, JM ;

Weaver, CE .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1996, 30 (01) :89-96

[12]

Olphen Hv, 1977, An Introduction to Clay Colloid Chemistry

[13]

Park SJ, 1999, SEPAR SCI TECHNOL, V34, P101

[14]

Pawliszyn J., 1997, SOLID PHASE MICROEXT

[15] Determining PCB sorption desorption behavior on sediments using selective supercritical fluid ertraction.: 1.: Describing PCB extraction with simple diffusion models [J].

Pilorz, K ;

Björklund, E ;

Bowadt, S ;

Mathiasson, L ;

Hawthorne, SB .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1999, 33 (13) :2204-2212

[16] SUPERCRITICAL EXTRACTION OF CROTALARIA-SPECTABILIS IN THE CROSSOVER REGION [J].

SCHAEFFER, ST ;

ZALKOW, LH ;

TEJA, AS .

AICHE JOURNAL, 1988, 34 (10) :1740-1742

[17] SUPERCRITICAL FLUID DESORPTION FROM ACTIVATED CARBON [J].

SRINIVASAN, MP ;

SMITH, JM ;

MCCOY, BJ .

CHEMICAL ENGINEERING SCIENCE, 1990, 45 (07) :1885-1895

[18] DESORPTION OF ETHYL-ACETATE FROM ACTIVATED CARBON BY SUPERCRITICAL CARBON-DIOXIDE [J].

TAN, CS ;

LIOU, DC .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1988, 27 (06) :988-991

[19] SWELLING AND SORPTION IN POLYMER-CO2 MIXTURES AT ELEVATED PRESSURES [J].

WISSINGER, RG ;

PAULAITIS, ME .

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1987, 25 (12) :2497-2510

[20] SORPTION AND DESORPTION OF QUATERNARY AMINE CATIONS ON CLAYS [J].

ZHANG, ZZ ;

SPARKS, DL ;

SCRIVNER, NC .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1993, 27 (08) :1625-1631

← 1 2 →