System n-heptane

C2. Carmichael, L. T., Reamer, H. H., and Sage, B. H., Diffusion Coefficients in Hydrocarbon Systems. n-Heptane in the Gas Phase of the Methane-n-Heptane System (submitted to Ind. Eng. Chem. for publication). 

Table III Retention data (hRf values) for bromophos-ethyl and dimethoate on an HPTLC pre-coated plate silica gel 60 (solvent system n-heptane/acetone 65/35) and on an HPTLC pre-coated plate RP-18 (solvent system acetone/water 80/20)...

Table 6.4 Effect of zeolite pore system (n-heptane conversion over Pt/zeolite) (from Giannetto et al. [30]).

Figure 3. Heat capacity of the system n-heptane zeolite NaCaA...

Fig. 24.1. Thermodynamic excess functions for the system n-heptane (1) + n-hexadecane (2) at 20 °C.

FIGURE 7.2-3 Equilibrium data for the system n-heptane, methylcyclohexane, and aniline at 25 °C. (Data from Ref, 2),... 

Consider the binary differential distillation of Example 6.3. For this system, n-heptane with n-octane at 1 atm, the average relative volatility is a = 2.16 (Treybal, 1980). Using equation (6-117) derived in Problem 6.7, compute the composition of the residue after 60 mol% of the feed is batch distilled. 

Liquid-liquid equilibrium data for the system n-heptane-methyl cyclohexane-aniline at 25°C and at 1 atm (101 kPa)... 

Curve of separating stages against refractive index for the system n-heptane-methyloyclohexane... 

It has become international practice to employ the mixtures n-heptane-inethyl-uyclohexane, 1.2-dichloroethane-benzene, benzene-carbon tetrachloride und benzene-ethylene dichloride (for plate numbers up to 50 or 60) and benzene-carbon tetrachloride (for plate numbers up to 30) for tests at atmospheric pressure. Brandt and Rock [196] examined the system n-heptane-methylcyclohexane as regards its ideality of behaviour. It was found that the mixture must be classed as a separate typo, termed pseudo-ideal , because the heats of mixing are not negligible in spite of the constancy of the relative volatility. The system is also very suitable for testing under reduced pressure. A further advantage is that the molar heats of evaporation of the components are almost the same (7.575 kcal/mole). For plate numbers from 100 to 500 heavy water is suitable as a test substance [214]. The system... 

Fig. 3.16. Calculated activities of cyclohexane in the system n-heptane (A)-aniline (B)-cyclohexane (C).

Hunter and Brown [Zndl. Eng, Chem, 39,1343 (1947)] have determined the equilibrium in the Type 2 system n-heptane (A)-aniline (B)-cyclohexane (C) at 25°C. For each of the equilibrium-data points reported, calculate the constant of Eq. (2.15), and average for the entire system. Plot the data in the manner of Fig. 2.30, together with the Eq. (2.15), using the average value of Comment on the ability of the equation to describe the data. 

Equilibrium data for the Type 2 system n-heptane (A)-aniline (jB) methylcyclo-hexane (C) at 25 C. (23) show to be substantially constant, 1.90. Using this value, calculate the minimum number of enriching and stripping stages, and the minimum external raffinate and extract reflux ratios, for the separation of a mixture containing 50% A, 50% Cy with B as solvent, into products containing 2% A and 98% A, all on a solvent-free basis. Feed, products, and refluxes are to be saturated with solvent. 

Sayegh, S. G. Vera, J. H. Ratcliff, G. A. Vapor-liquid equihbria for the ternary system n-heptane/n-propanol/l-chlorobutane and its constituent binaries at 298.15 K Can. J. Chem. Eng. 1979,57, 513-516... 

Dojcansky, J. Sakalosova, L. Surovy, J. Isothermal liquid-vapour equihbrium in the systems n-heptane - toluene and toluene -dimethylformamide at 40.deg.C Chem. Zvesti 1974, 28, 160-165... 

IV Heptane -system n-heptane-ethylene dichloride-formic acid-propionic acid (90 + 30 + 21 + 18), 100 ml of upper phase used. 

Figure 6.9.3 Stability diagram of the system n-heptane and toluene.

Figure 7.1.19. Toluene composition ratio according to equilibrium theory and the data of Wilhelm et aL (1968) for the system n-heptane-toluene in a silica gel column (Pigford et al, 1969a). Reprinted, with permission, from I EC Fund., 8(1), 144, (1969), Figure 6. Copyright (1969) American Chemical Society.

Tarakad, R. R. Seheller, W. A. Isothermal vapor-liquid equilibrium data for the system n-heptane - n-valeraldehyde at 75 and 90.deg.C. J. Chem. Eng. Data 1979, 24, 119-120. 

Raviprasad, A. Rao, K. V Chiranjivi, C. Isobaric vapour-liquid equilibrium data for die systems n-heptane - chlorobenzene and trichloroethylene - methyl isobutyl ketone (MIBK). Indian Chem. Eng. 1976, 18, 47-49. 

Quitzsch, K. Strittmatter, D. Geiseler, G. Studium zur Thermodynamik binaerer Fluessigkeitsgemische mit homologen Formamiden. VIII. Die binaeren Systeme n-Heptan(l)/Dimethylformamid(2) und n-Heptan(l)/Diaethylformamid(2). Z. Phys. Chem. (Leipzig) 1969, 240, 107-126. 

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