The present paper is aimed at showing the usefulness of supercritical fluid extraction in the removal of organic substances and zinc from the surface of a dangerous waste product, i.e. spent catalyst employed in the manufacture of vinyl acetate. The possibility of recovering active carbon (the carrier support for the catalyst concerned) so that it may be used in subsequent processes by combining supercritical fluid extraction with hydrochloric acid leaching has been demonstrated.
References
1.
AdschiriT.SuzukiT. and AraiK. (1991) Fuel70, 1483.
2.
CzarnyZ.WolczkoJ. and DąbekL. (1990) Przem. Chem.69, 404.
3.
DąbekL. (2001) Przem. Chem., accepted for publication.
4.
DeFilippiR.P.KrakonisV.J.RobeyR.J. and ModellM. (1980) Supercritical Fluid Regeneration of Activated Carbon for Adsorption of Pesticides, Environmental Protection Agency Report, Washington, DC, USA.
5.
GrajekH. (2000) Adsorp. Sci. Technol.18, 347.
6.
GrajekH.WitkiewiczZ.RobakJ. and KubickaK. (1998) Przem. Chem.77, 8.
7.
HigashidateS.YamauchiY. and SatioM. (1990) J. Chromatogr.515, 295.
8.
HuH.Q. and GuoS. (1992) Fuel Process. Technol.31, 79.
9.
JankowskaH.GrajekH.WitkiewiczZ. and ŚwiątkowskiA. (1998a) Przem. Chem.77, 219.
10.
JankowskaH.GrajekH.WitkiewiczZ. and ŚwiątkowskiA. (1998b) Przem. Chem.77, 415.
11.
MüllerB.UlrichD.GordzielV. and KiesslingD. (1985) Chem. Tech.37, 160.
12.
NamieśnikJ.ŁukasiakJ. and JamrógiewiczJ. (1995) Pobieranie próbek środowiskowych do analiz, WNT, Warsaw.
13.
OndrejovičG. and SirotaA. (1999) Monogr. Ser. Int. Conf. Coord. Chem., Smolenice, Slovakia, Vol. 4, Slovak Technical Press, Bratislava, Slovakia.
14.
RobakJ.GrajekH.KubickaK. and WitkiewiczZ. (1997) Przem. Chem.76, 304.
15.
SmithR.M. (1996) LC–GC Int.9, 8.
16.
StolarskiM. and SzczygiełJ. (1991) Fuel70, 1421.
17.
TanC.S. and LiouD.C. (1988) Ind. Eng. Chem., Res.27, 988.
18.
WangS.ElshaniS. and WaiC.M. (1995) Anal. Chem.67, 919.
19.
WelcherF.J. (1958) The Analytical Uses of Ethylenediamine Tetraacetic Acid, D. Van Nostrand Co., Inc., New York.
20.
WilheimA. and HeddenA. (1986) Fuel65, 1209.
21.
WilsonE.K. (1996) C & EN, West Coast Bureau27, 15 (April issue).
