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

Abstract

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.

Authors:
; ;
Publication Date:
Research Org.:
Clemson Univ., SC (US)
Sponsoring Org.:
USDOE
OSTI Identifier:
20076018
DOE Contract Number:  
FG22-94PC94219
Resource Type:
Journal Article
Journal Name:
Journal of Chemical and Engineering Data
Additional Journal Information:
Journal Volume: 45; Journal Issue: 3; Other Information: PBD: May-Jun 2000; Journal ID: ISSN 0021-9568
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 10 SYNTHETIC FUELS; WAXES; HEXANE; BINARY MIXTURES; EQUILIBRIUM; PHASE STUDIES; MOLECULAR STRUCTURE; FISCHER-TROPSCH SYNTHESIS; SUPERCRITICAL GAS EXTRACTION

Citation Formats

Joyce, P.C., Gordon, J., and Thies, M.C. Vapor-liquid equilibria for the hexane + tetracosane and hexane + hexatriacontane systems at elevated temperatures and pressures. United States: N. p., 2000. Web. doi:10.1021/je990229y.
Joyce, P.C., Gordon, J., & Thies, M.C. Vapor-liquid equilibria for the hexane + tetracosane and hexane + hexatriacontane systems at elevated temperatures and pressures. United States. doi:10.1021/je990229y.
Joyce, P.C., Gordon, J., and Thies, M.C. Thu . "Vapor-liquid equilibria for the hexane + tetracosane and hexane + hexatriacontane systems at elevated temperatures and pressures". United States. doi:10.1021/je990229y.
@article{osti_20076018,
title = {Vapor-liquid equilibria for the hexane + tetracosane and hexane + hexatriacontane systems at elevated temperatures and pressures},
author = {Joyce, P.C. and Gordon, J. and Thies, M.C.},
abstractNote = {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.},
doi = {10.1021/je990229y},
journal = {Journal of Chemical and Engineering Data},
issn = {0021-9568},
number = 3,
volume = 45,
place = {United States},
year = {2000},
month = {6}
}