Isothermal vapor-liquid equilibrium data for system heptane-2-pentanone at 90.deg.

Abstract

The solubilities of 2,2,4-trimethylpentane and diethyl, di-n-propyl, diisopropyl, and di-n-butyl ether in liquid ammonia were determined by means of a carrier solventgas chromatographic method. Values were obtained in the temperature range -74°to -36°C. Two immiscible liquid phases are observed in this range, except for the case of diethyl ether which exhibits an upper critical solution temperature of -42 ± 1°C.A series of Investigations was carried out in this laboratory Involving liquid-liquid extraction of various types

Vapor–Liquid Equilibria Measurements for the Ninen-Alkane/Ketone Pairs Comprising 2-, 3-, and 4-Heptanone withn-Octane,n-Nonane, andn-Decane

“…The azeotropic point in each case was observed experimentally by an equilibrium temperature lower than the n-octane boiling point, and occurs in the very dilute x-heptanone concentration range. The definite distinction between the phase envelopes, coupled with the different (2) 368.3 0.98 n-octane (1)/4-heptanone (2) 368.3 0.98 n-nonane(1)/2-heptanone (2) 386.7 0.53 n-nonane(1)/3-heptanone (2) 385.7 0.44 n-nonane(1)/4-heptanone (2) 383.8 0.34 n-decane(1)/2-heptanone (2) 391.7 0.03 n-decane(1)/3-heptanone (2) 388.6 0.02 n-decane(1)/4-heptanone (2) 385.5 0.02 boiling points of the three isomers, highlights the effect of the location of the polar group in the carbon chain on the experimental phase behavior.…”

“…Fax: +27 21 808 2059. 2 )/(n)) 1/2 where n is the number of data points excluding those for the pure component …”

“…Binary T−x−y phase diagrams of experimentally measured VLE data for n-nonane with each structural isomer of heptanone at 40.0 kPa: • and ▲, experimental vapor and liquid for n-nonane (1)/2-heptanone (2); gray ○ and gray △, experimental vapor and liquid for n-nonane (1)/3-heptanone (2); ○ and △, experimental vapor and liquid for n-nonane (1)/4-heptanone(2).…”

“…Residual plot (δy = y 1 calc − y 1 exp ) for the NRTL correlation of vapor phase for the system n-decane (1)/3-heptanone(2).…”

Prediction of the binary parameters of a cubic equation of state from a group-contribution method

“…Let q k = ak/b&T; a solution corresponding to a stable liquid phase exists if (21) and its value is Maher and Smith, 1980Hirata et al, 1975Hirata et al, 1975Gmehling and Onken, 1977Knapp et al, 1982Gmehling and Onken, 1977Gmeling and Onken, 1977Chang et al, 1982Gmehling and Onken, 1977Gmehling and Onken, 1977Gmehling and Onken, 1977Hirata et al, 1975Knapp et al, 1982Scheller et al, 1973Maher and Smith, 1980Hirata et al, 1975Gmehling and Onken, 1977McGlashan and Williamson, 1976Reamer et al, 1952 In a binary mixture, one has, from the quadratic mixing rules, and finally, the expression for the activity coefficient of component 1 is…”