Vapor-liquid equilibria for the hexane + tetracosane and hexane + hexatriacontane systems at elevated temperatures and pressures

Journal Article · Thu Jun 01 04:00:00 EDT 2000 · Journal of Chemical and Engineering Data

DOI:https://doi.org/10.1021/je990229y· OSTI ID:20076018

Joyce, P C; Gordon, J; Thies, M C

Vapor and liquid equilibrium compositions have been measured for the hexane + tetracosane and hexane + hexatriacontane systems at temperatures from 473.0 K to 622.9 K and pressures from 6.2 bar to 64.5 bar. A continuous-flow apparatus was used so that the low wax concentrations in the vapor phase could be accurately measured. Mixture critical pressures and compositions were also measured. The effects of chain length, branching, and substituent groups on the phase behavior of binary systems containing hexane + a long-chain alkane are summarized in the form of a pressure versus temperature projection. A practical application of this work is the separation of Fischer-Tropsch waxes from reactor catalyst via supercritical extraction. The proposed process uses near or supercritical solvents such as pentane and hexane for extraction and recovery of the waxes, which consist of paraffins, olefins, and alcohols up to C{sub 200} in size.

• Research Organization: Clemson Univ., SC (US)
• Sponsoring Organization: US Department of Energy
• DOE Contract Number: FG22-94PC94219
• OSTI ID: 20076018
• Journal Information: Journal of Chemical and Engineering Data, Journal Name: Journal of Chemical and Engineering Data Journal Issue: 3 Vol. 45; ISSN JCEAAX; ISSN 0021-9568
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
BINARY MIXTURES
EQUILIBRIUM
FISCHER-TROPSCH SYNTHESIS
HEXANE
MOLECULAR STRUCTURE
PHASE STUDIES
SUPERCRITICAL GAS EXTRACTION
WAXES