PROCEEDINGS

2ND INTERNATIONAL SYMPOSIUMON

SUPERCRITICAL FLUIDS

BOSTON, MASSACHUSETTSLONG WHARF MARRIOTT HOTEL

20-22 MAY 1991

UNIVERSITATSBIBLIOTHEKHANNOVER

TECHNISCHEINFORMATIONSBIBLIOTHEK j

UB/TIB Hannover 89101 319 363

RR 1505(2)

TABLE OF CONTENTS

MAY 20, PHASEX CORPORATION PLENARY LECTURE

Supercritical decaffeination of coffee 1Michael J. O'Brien & Jean E. Spence, General Foods USA

MAY 20, ORAL COMMUNICATIONSAl: Natural Materials IExtraction dynamics and optimization for the supercritical fluid extraction of eveningprimrose oil 2

F. Favati, J. W. King, & M. Mazzanti, United States Department of Agriculture, USA.

Recovery of octacosanol with supercritical CO2 by the two stage separation on thecommercial scale 6

K. Hamatani, M. Takahashi, J. Ogasahara, & S. Inada, Sumitomo, Japan.

Extraction/fractionation of egg yolk using supercritical CO2 and alcohol entrainers 10N. R. Bulley & L. Labay, University of Manitoba, Canada.

Influence of cosolvents on solubility and selectivity in extraction of xanthine stimulantsand cocoa butter from cocoa beans with supercritical CO2 13

S. Li & S. Hartland, ETH, Switzerland.

Supercritical fluid extraction of fungal lipids using mixed solvents 17M. L. Cygnarowicz-Provost, D. J. O'Brien, R. J. Maxwell, & J. W. Hampson,United States Department of Agriculture, USA.

MAY 20, ORAL COMMUNICATIONSA2: TransportExperimental methods for studying salt nucleation and growth from supercritical water 21

F. J. Armellini & J. W. Tester, MIT, USA.

Measurements of binary diffusion coefficients of organic compounds insupercritical carbon dioxide by a tracer response technique 25

T. Funazukuri & N. Wakao, Yokohama University, Japan.

Viscosity and density of polystyrene solutions in near- and supercriticalbutane and pentane 29

Y. L. Sen & E. Kiran, University of Maine, USA.

Equilibrium and kinetic parameters for CO2-adsorbate-adsorbent systems bytracer response 33

H. Gadalla, C. Erkey & A. Akgerman, Texas A&M University, USA.

MAY 20, ORAL COMMUNICATIONSA3: Materials ProcessingFractionation of rocket propellant binders with supercritical and near critical fluids 37

J. J. Watkins & V. J. Krukonis, Phasex Corporation, USA.

Fractionation and phase behavior of ethylene-based copolymers 41M. A. McHugh, B. M. Hasch, & M. A. Meilchen, Johns Hopkins University, USA.

Gas antisolvent recrystallization: Application to the separation and subsequentprocessing of RDX and HMX 45

P. M. Gallagher & V. J. Krukonis, Phasex Corporation & L. J. Vandekeift,Ballistics Res. Lab, Aberdeen Proving Ground, MD, USA.

MAY 20, ORAL COMMUNICATIONSBl: ThermodynamicsKinetics and mechanisms of solute-fluid and solute-solute interactions in supercritical fluids:A time-resolved fluorescence study 49

F. V. Bright, T. A. Betts, & J. Zagrobelny, SUNY at Buffalo, USA.

Vapor-liquid equilibrium data for supercritical fluid extraction of oxychemicalsfrom water 52

M. Zabaloy, G. Mabe, S. B. Bottini, & E. A. Brignole, University of Argentina.

Solid-liquid-vapor phase equilibria of the mixture CC>2+n-hexane+n-hexatriacontane 56S.-P. Hong & K. D. Luks, University of Tulsa, USA.

Phase equilibria of the quaternary system CO2-water-acetone-n-butanol 59S. Winkler, & K. Stephan, University of Stuttgart, Germany.

Measurements of cosolvent effects with supercritical fluid chromatography 63M. P. Ekart & C. A. Eckert, Georgia Institute of Technology, USA.

MAY 20, ORAL COMMUNICATIONSB2: Thermodynamics IIThe critical loci of binary polar and nonpolar organic compound-CO2 systemsat low solute concentrations 66

G. S. Gurdial, N. Foster, & J. S. L. Yun , New South Wales, Australia.

Pressurized gases in contact with liquid reversed micellar solutions: effects onmicellar size and stability, and biotechnology applications 70

V. J. John, M. Rao, H. Nguyen, & J. B. Phillips, Tulane University, USA.

Phase behavior of microemulsions in compressible fluids 74K. P. Johnston, G. J. McFann, D. G. Peck, University of Texas, USA.

\Production of mesophase pitch by supercritical fluid extraction 78

G. Balanos, T. Hochgeschurtz, & M. C. Thies, Clemson University, USA.

MAY 20, ORAL COMMUNICATIONSB3: Chromatography IQuantitative analysis of polymer additives by coupled SFE/SFC 82

L. Baner, J. Ewender, R. Franz, & O. Piringer, Institute of Food, Germany.

Enantiomer fractionation by preparative supercritical fluid chromatography 86G. Fuchs, L. Doguet, M, Perrut, A. Tambute, & P. Le Goff,Separex Corporation, France.

A high-throughput supercritical fluid extraction system for the preparation of samplesprior to analytical determinations 90

B. E. Richter, E. R. Campbell, A. F. Rynaski, B. J. Murphy, N. L. Porter, &R. B. Nielsen, Lee Scientific, USA.

MAY 21, DEPARTMENT OF CHEMICAL ENGINEERINGJOHNS HOPKINS UNIVERSITY PLENARY LECTURE

High pressure combustion and flames in supercritical water 91Professor E. U. Franck, Universitat Karlsruhe, Germany

MAY 21, ORAL COMMUNICATIONSAl: Natural Materials IIEffective process to refine ethanol by supercritical or sub-critical carbon dioxide 97

S. Hirohama, M. Ojiro, T. Takatuka, F. Kanegae, & T. Muto, Idemitu, Japan.

Extraction of plant materials with supercritical CO2 101Z. Knez, F. Posel, J. Hunek, & J. Golob, University of Maribor, Yugoslavia.

Supercritical fluid extraction of ethanol from water using hydrocarbon solvent 105H. Horizoe, T. Tanimoto, I. Yamamoto, K. Ogawa, M. Maki, & Y. Kano,Mitsubishi, Japan.

Separation of two quantitative and qualitative equivalent components 109U. K. Salzman & K. Wuffli, Carbagas, Austria.

Degreasing of protein-hydrolysate by supercritical CO2 I l lF. Froschl, R. Marr, & M. Nussbaumer, Inst Therm, Austria.

Effects of high pressure CO2 treatment on enzyme activity in model systems andorange juice 114

M. Balaban, S. Pekyardimci, M. Marshall, A. Arreola, J. S. Chen,& C. I. Wei, University of Florida, USA.

MAY 21, ORAL COMMUNICATIONSA2: Thermodynamics •- ModellingThe MHV2 model: prediction of phase equilibria at sub and supercritical conditions 118

S. Dahl, Aa. Fredenslund, & P. Rasmussen, University of Denmark, Denmark.

Modified cubic equation of state with binary parameters predicted from a groupcontribution method 122

R. Saini, G. A. Melhem, & B. M. Goodwin, Northeastern University, USA.

Phase behavior prediction for heavy hydrocarbons 127P. Alessi, M. Fermeglia, I. Kikic, & E. Neau, University of Trieste, Italy.

Efficient simulation of supercritical extraction processes with advancedthermodynamic models 131

E. L. Sorensen, I. Tessaro, & R. Gani, University of Denmark, Denmark.

MAY 21, ORAL COMMUNICATIONSA3: Specialty MaterialsThin films from the free-jet expansion of supercritical water-alumina solutions 135

J. I. Brand and D. R. Miller, University of California at San Diego, USA.

Critical fluid disruption of microbial cells 139T. P. Castor & G. T. Hong, BioEng, USA.

Solubility measurements of certain antibiotic drug classes in supercritical fluids 143R. J. Maxwell, J. W. Hampson, & M. L. Cygnarowicz-Provost, USDA, USA.

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MAY 21, ORAL COMMUNICATIONSBl: ReactionsLipase catalyzed reactions of chiral esters in supercritical carbon dioxide 146

O. Aaltonen & M. Rantakyla, Res Center, Finland.

Continuous synthesis of ethyl myristate by enzymatic reaction in supercriticalcarbon dioxide 150

T. Dumont, D. Barth, & M. Perrut, Separex, France.

Ultrafast measurements of the role of the supercritical fluid micro-environment onchemical dynamics 154

F. C. Knopf, X. Xu, S.-C. Yu, R. Lingle, & J. B. Hopkins, LSU, USA.

In situ extraction of coke compounds from porous catalysts with supercritical reactionmedia: a promising technique for investigating chemistry of coke formation 157

S. Saim, D. M. Ginosar, & B. Subramaniam, University of Kansas, USA.

Supercritical fluid solubilities of catalyst precursors 161R. P. Warzinski & G. D. Holder, DOE, USA.

Supercritical water for decontaminating soil material 165G. Brunner & K. Nowak, U Hamburg-Harburg, Germany.

MAY 21, ORAL COMMUNICATIONSB2: Supercritical Water -- ReactionsHigh pressure thermodynamics in supercritical water oxidation processes 169

N. E. Bergan, P. B. Butler, & H. A. Dwyer, Sandia Labs, USA.

The fate of nitrogen in supercritical water oxidation 173W. R. Killilea, K. C. Swallow, & G. T. Hong, Modar Inc, USA.

Fundamental kinetics and mechanisms of hydrogen oxidation in supercritical water 177H. R. Holgate & J. W. Tester, MIT, USA.

Measurement of rate parameters above the critical pressure of water. 181J. C. Chen, Y. T. Shah, & M. A. Abraham, University of Tulsa, USA.

MAY 21, ORAL COMMUNICATIONSB3: Special TopicsAdsorption of supercritical carbon dioxide on biological materials 185

K. Nakamura, T. Hoshino, & H. Ariyama, Gunma University, Japan.

Organometallic chemistry in supercritical fluids 189M. Poliakoff, S. M. Howdle, M. Jobling, & M. W. GeorgeUniv. of Nottingham, England.

Microparticle formation in reverse micelles and (W/O) microemulsionsin supercritical alkanes 193

T. S. Zemanian, J. L. Fulton, J. C. Lineham, & R. D. Smith, Battelle, USA.

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MAY 22, JOURNAL OF SUPERCRITICAL FLUIDS PLENARY LECTURE

Supercritical fluid processing: Research and business activities in Japan 196Dr. R. Fukuzato, Kobe Steel, Ltd., Japan

MAY 22, ORAL COMMUNICATIONSAl: Chromatography IIA variational solution of the optimal resolution problem in SFC 201

V. Grover, F. VanPuyvelde, & E. H. Chimowitz, University of Rochester, USA.

Trace analysis methods for SFE CO2 203S. B. Miller, D. G. Plessor, R. Flaska, R. G. Heckert, & R. B. Denyszyn,Scott Gases, USA.

Evaluation of retention mechanisms displayed by a porous glassy carbon stationary phase.. .208S. V. Olesik, T. M. Engel, & Yi Cui, Ohio State University, USA.

High pressure adsorption isotherms for SCF mobile phases on silica and octadecyl-bondedsilica adsorbents: binary isotherms of CO2 and methanol 213

J. R. Strubinger, H. Song, & J. F. Parcher, Mississippi, USA.

Supercritical fluid chromatography and supercritical fluid extraction coupled to asecondary ion mass spectrometer 216

B. Wenclawiak, W. Sichtermann, & J. Schipke, University of Siegen, Germany.

Microscale supercritical fluid extraction - supercritical fluid chromatography to investigatethe extraction efficiency of additives from polymer matrices 219

M. Ashraf-Khorassani, D. S. Boyer, K. Cross, J. M. Levy, & R. K. Houck,Suprex Corp, USA.

MAY 22, ORAL COMMUNICATIONSA2: PolymersModeling crystallization in solid polymers induced by compressed gas sorption atelevated pressures 222

N. Kalospiros & M. Paulaitis, University of Delaware, USA.

High-pressure phase equilibria in binary and ternary systems of alternatingpoly(ethylene-propylene) 225

S. J. Chen & M. Radosz, Exxon, USA.

Nucleation of biocompatible polymers 229J. W. Tom & P. G. Debenedetti, Princeton University, USA.

Solubility of supercritical gases in polydimethylsiloxane 233A. Garg, E. Gerhardt, L., Gulari, & C. W. Manke, Wayne State University, USA.

MAY 22, ORAL COMMUNICATIONSBl: Thermodynamics -- IIISolvation in supercritical water 237

H. D. Cochran, P. T. Cummings, & S. Karaborni, University of Virginia, USA.

Analysis of the critical lines of the Tompa model for a binary gas-liquid mixture 241P. H. E. Meijer, I. L. Pegg, & M. Keskin, Catholic University, USA.

Solvent and structural changes in repulsive and attractive supercritical mixtures:A molecular distribution study 245

R. S. Wu, L. L. Lee, & H. D. Cochran, University of Oklahoma, USA.

Solubility near the solvent's critical point 249J. M. H. Levelt Sengers, NIST, USA.

Thermodynamic behavior of fluids in the supercritical region 254S. Tang & J. V. Sengers, University of Maryland, USA.

Study of aggregation of polar solute in supercritical fluid by molecular dynamics 258D. M. Pfund & R. D. Smith, Battelle, USA.

MAY 22, ORAL COMMUNICATIONSB2: Simulations & OperationsThe economics of supercritical coffee decaffeination 261

W. E. Leyers, R. A. Novak, & D. A. Linnig, Flour Daniel, USA.

Separation of bi and tricyclic aromatic compounds using retrograde crystallization fromsupercritical fluids 264

T. Sako, S. Yamane, & M. Sato, Nat. Lab, Japan.

Design and control of CO2 extraction plants 268M. Sims & T. L. Thompson, Marc Sims Inc., USA.

Design and installation conditions of diaphragm pumps for high pressure andsupercritical fluids 272

G. Vetter, L. Depmeier, & Schubert, Erlangen, Germany.

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Poster Papers: Natural MaterialsManufacture of lecithin from oat oil by supercritical extraction 276

M. Alkio, O. Aaltonen, R. Kervinen, P. Forssell, & K. Poutanen,Food Res Lab, Finland

Supercritical carbon dioxide extraction of peppermint and spearmint 279P. Barton, R. E. Hughes, Jr., & M. M. Hussein, Penn State, USA

Effects of operating conditions and adsorbents on cholesterol reduction ofextracted beef tallow using supercritical CO2 283

R. R. Chao, S. J. Mulvaney, H. Huang,'& Y. A. Kwon, U. Missouri, USA

Progress with compressed gases used in the food stuff technology 284J. Schulmeyr, M. Gehrig, & A. Forster, John I. Haas, Germany

Separation of fatty acids with supercritical CO2 288R. Bharath, T. Adschiri, H. Inomata, K. Arai, & S. Saito, Tohoku U., Japan

Continuous supercritical CO2 processing of milk fat 292S. Lim, G.-B. Lim, & S. S. H. Rizvi, Cornell U., USA

Supercritical fluid extraction of carotenoids from Dunaliella Algae 297T. V. Lorenzo, S. J. Schwartz, & P. K. Kilpatrick, NC State Univ, USA

Novel citric acid purification process using compressed carbon dioxide 299A. Shishikura, H. Takahashi, S. Hirohama, & K. Arai, Japan

Counter current extraction of dioxins from cod liver oil by supercritical carbon dioxide 303M. Jakobsson, B. Sivik, P.-A. Bergqvist, B. Strandberg, M. Hjelt, &C. Rappe, Univ Lund, Sweden

Supercritical fluid extraction from a mediteraneen brown alga 304P. Subra, R. Tufeu, & Y. Garrabos, Univ Paris, France

Solubility of biological compounds in supercritical fluids 308C.-H. Lee, E. Kosal, and G. D. Holder, Univ. Pitt., USA

Cholesterol removal from liquid egg yolk by supercritical extraction 312G. Pasin, R. A. Novak, W. J. Reightler, A. J. King, & G. Zeidler, UCA,Davis, USA

Poster Papers: TransportContinuous monitoring of caffeine extraction from coffee beans with flowingsupercritical carbon dioxide 316

M. P. Srinivasan, H. Peker, & B. J. McCoy, UCA, Davis, USA

Electrochemical measurements of the diffusion coefficient of m-chloronitrobenzenein near and supercritical ammonia 320

K. Otake, H. Mochida, C. Yokoyama, & S. Takahashi, Tohoku U, Japan

Experimental studies and modeling for supercritical fluid/liquid/solids in fixed beds 324U. Akman & A. K. Sunol, U So. Florida, USA

Mass transfer coefficients and equilibrium solubilities for fluid-supercritical solventsystems by online NIR-spectroscopy 329

B. Zehnder & Ch. Trepp, ETH, Switzerland

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Poster Papers: Materials ProcessingExtraction of bituminous coal with supercritical butanol 3 32

C. Zhang, M. Wang, & B. J. McCoy, UCA, Davis, USA

Designing surfactants for use in CO2 336T. H. Hoefling, R. M. Enick, & E. J. Beckman, U Pitt, USA

Flow field effects on particles formed from the rapid expansion of supercritical fluidsolutions 338

G. R. Shaub, J. F. Brennecke, & Mark J. McCready, U ND, USA

Effect of hydroxyaluminum disoaps and perfluoroalkypolyethers on the viscosity ofliquid propane and carbon dioxide 341

D. Stofesky, M. Reid, & R. M. Enick, U Pitt, USA

Separation of thermoplastics by density using near- and supercritical fluids as aprecursor to recycling 345

M. S. Super, R. M. Enick, & E. J. Beckman, U Pitt, USA

Supercritical carbon dioxide extraction of spent bleaching clays 349J. W. King, G. R. List, & J. H. Johnson, USDA, USA

Solubility and decomposition studies on organometallic compounds insupercritical fluids for ceramic precursor powders elaboration 353

C. Pommier, J. F. Bocquet, K. Chor, & M. Barj, U Paris, France

Binder removal from ceramic green body in the environment of supercriticalcarbon dioxide with/without entrainers 357

N. Nakashima & E. Nishikawa, Sumitomo, Japan

Development of a submicron monodispersed aerosol generator employingsupercritical fluid nucleation 360

M. P. Coffey & V. J. Krukonis, Phasex, USA

Supercritical fluid aided wood-polymer composite manufacture 364D. Ward, A. K. Sunol, & R. Curcio, U So Florida, USA

Description of an industrial size supercritical gas extraction plant for semicontinuousoperation 368

M. Bork & J. P. Komer, Uhde, Germany

Solvent-free microporous polymer gels crystallized from supercritical solution 372D. Pradham, R. B. Stewart, T. E. Gebo, & P. Ehrlich, SUNY, USA

Poster Papers: Simulations & Pilot Plant OperationsDynamics of near critical extraction with CO2 in a semibatch pilot plant:theory and experiment for a hexane/1-hexene mixture 375

A. Bertucco, G. B. Guarise, & T. Panziera, Univ Padova, Italy

High performance pilots for SC extraction 379M. Carles, J. Fra, C. Perre, & G. Delestre, CEA, France

A model for dynamic extraction using a supercritical fluid 382K. D. Bartle, T. Boddington, A. A. Clifford, & S. B. Hawthorne,Univ Leeds, England

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Development of a model for computer simulation of semibatch near-critical andsupercritical fluid extraction units 386

I. E. Colussi & V. Gallo, Univ Trieste, Italy

A process for the fractionation of alkanes with supercritical carbon dioxide 390A. B. de Haan & J. de Graauw, Delft Univ, Netherland

Separation of ethanol from aqueous solutions by supercritical carbon dioxide:comparison between simulation and experiment 394

L. Bernad, A. Keller, D. Barth, & M. Perrut, Separex, France

Flash discharge of high pressure gas and supercritical fluid: experimental results andmodelization 398

H. S. Li & M. Perrut, Separex, France

Effects of supercritical fluids in distillation columns calculations 402I. C. Tessaro & K. Rajagopal, Univ Rio, Brazil

Poster Papers: Reactions

Lipase catalyzed esterification of glycidol in near critical carbon dioxide 406J. F. Martins, S. B. Barreiros, E. G. Azevedo, & M. Nunes da Ponte,U. Lisbon, Portugal

Supercritical fluid extraction of coal 408T. Adschiri, S. Abe, & K. Arai, Tohoku Univ, Japan

Catalytic reforming of coal tar pitches in supercritical fluids 411T. Adschiri, T. Suzuki, & K. Arai, Tohoku Univ, Japan

Improvement of coal gasification by salts dissolved in supercritical water 414M. Nywlt & S. Peter, Univ Erlangen, Germany

Development of a semicontinuous supercritical chlorinator 418D. A. Swift & S. T. Watkins, Curtin U., Australia

Kinetics of phenol oxidation in supercritical water 421T. D. Thorton & P. E. Savage, U. MI, USA

The effect of salts on hydrolysis in supercritical water: reactivity and availability 425L. A. Torry, R. Kaminsky, M. T. Klein, & M. R. Klotz, Univ Delaware, USA

Poster Papers: Chromatography

On sensitivity of detection in packed column SFC: Effect of some parameters 429H. Huang & E. D. Morgan, Univ Keele, England

Separation of model compounds found in pyrolitic oils by supercritical CO2on various columns 431

J. L. Grandmaison, D. Y. Shang, & S. Kaliaguine, Univ Laval, Canada

Separation of polyunsaturated fatty acid from vegetable oil bysupercritical fluid chromatography 434

N. Ikawa, S. Furuta, R. Fukuzato, N. Imanishi, H. Kawana, M. Misuiki, &S. Tsujimoto, Kobe Steel, Japan

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Analytical applications of supercritical fluid extraction in the petroleum andpetrochemical industry 437

T. P. Lynch & R. E. A. Escott, BP Co. PLC, England

The art of packing preparative supercritical fluid columns 441L. Doguet & M. Perrut, Separex, France

Flow modelisation in preparative supercritical fluid chromatography columns 444L. Doguet, M. Perrut, & R.-M. Nicoud, Separex, France

SCF-FTIR: towards the expert system 447M. Poliakoff, G. Davidson, M. A. Healy, T. J. Jenkins, M. Kaplan, &M. R. Simmons, Nottingham, England

Supercritical fluid extraction of garlic followed by chromatography 451N. Nawrot, B. Wenclawiak, Univ Siegen, Germany

Supercritical fluid extraction of organochlorpesticides 453J. Schipke & B. Wenclawiak, Univ Siegen, Germany

Supercritical fluid extraction of heater soot followed by chromatographic characterization... .456B. Wenclawiak, Th. Paschke, G. Maio , Univ Siegen, Germany

Influence of "negative" modifiers by the separation of aromatic hydrocarbons 457K. H. Pickel, Hoffman, Switzerland

Poster Papers: Thermodynamics

Density dependence of enhancement factor of liquid solute in supercritical fluids 459T. Suzuki, & K. Nagahama, Tokyo U, Japan

Modeling solute-cosolvent interactions for supercritical fluid extraction of fragrances 463G. V. Raghuram Rao, P. Srinivas, S. V. G. K. Sastry, & M. Mukhopadhyay,UT-Bombay, India

Prediction of solubilities in supercritical carbon dioxide: a correlation for Peng-Robinsoninteraction parameters 467

K. D. Bartle, A. A. Clifford, & G. S. Shilstone, Univ Leeds, England

Correlations for pure-component parameters of the Peng-Robinson equation of state 471R. Dohrn & G. Brunner, Tech. Univ. Hamburg-Harburg, Germany

On the application of concentration dependent mixing rules to systems containinglarge numbers of compounds 475

G. A. Melhem, R. Saini, C. F. Leibovici, ADL Corp, USA

Solubility of triglycerides in carbon dioxide 478D. L. Pearce & P. J. Jordan, Cantebury, New Zealand

Phase behavior of mixtures of near-critical propane with pure triglyceridesand edible oils and fats 482

E.J.M. Straver, J.L. de Roo, C.J. Peters, & J. de Swaan Arons,Delft Univ., Netherlands

High pressure vapor-liquid equilibria in binary mixtures of carbon dioxide and aromatichydrocarbons 485

D. Walther & G. Maurer, Kaiserlautem, Germany

Solubility of solid CCL4 in supercritical CF4 488T. A. Barber, H. D. Cochran, & P. R. Bienkowski, U Tennessee, USA

Solubility of solids in supercritical fluids 492P. Balbuena, E. Campanella, L. Gribaudo, INTEC, Argentina

High pressure multiphase equilibria of COo with polycyclic aromatic hydrocarbons 494G. L. White & C. T. Lira, Mich St, USA

Isotope separation from dilute, supercritical solutions 498H. D. Cochran & E. Johnson, Oak Ridge, USA

Monte Carlo simulation of supercritical solutions in the grand canonical ensemble 499V. M. Shah, H. D. Cochran, & P. R. Bienkowski, Univ Tenn, USA

Effect of molecular asymmetry on the behavior of dilute supercritical mixtures 501P. G. Debenedetti & I. B. Petsche, Princeton, USA

Molecular thermodynamics of solute-polymer-CO2 systems 502K. P. Johnston, P. Condo, J.-J. Shim, Univ Texas, USA

Measurement of solubilities of alcohols in supercritical fluids 506A. Staby & J. Mollerup, U. Denmark, Denmark

A new synthetic method for high pressure phase equilibria of ternary mixtures 510U. Bolz & K. Stephan, Univ Stuttgart, Germany

Dense gas extraction of an Alberta crude oil with supercritical carbon dioxide 513M. A. Trebble & P. M. Sigmund, Univ Calgary, Canada

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