Isothermal Vapor Liquid Equilibrium for Binary 2-Methylpropene + Methanol to Butanol Systems

Abstract

Vapor-liquid equilibria measured with a static apparatus are reported for binary mixtures of 2-methylpropene and the following C1-C4 alcohols at the corresponding temperatures: methanol (323.15 K), ethanol (323.15 K), 2-propanol (323.15 K), 2-butanol (323.15 K), and 2-methyl-2-propanol (313.15 K and 322.77 K). Measured pTz (pressure-temperature-total composition) data were reduced to liquid-and vapor-phase compositions using Barker's method. Binary interaction parameters were optimized for the Legendre polynomial, Wilson, UNIQUAC, and nonrandom two-liquid methods. An error analysis for all measured results was performed. All systems indicated a positive deviation from Raoult's law. Azeotropic behavior was observed for 2-methyl propene + methanol binary.

Isothermal Vapor Liquid Equilibrium for 2-Methylpropene + Methanol, + 1-Propanol, + 2-Propanol, + 2-Butanol, and + 2-Methyl-2-propanol Binary Systems at 364.5 K

“…On the basis on the Legendre polynomial fit, it is located at x 1 = 0.8857, T = 364.5 K, and p = 1631.7 kPa. The azeotropic behavior of isobutene + methanol was also found by Ouni et al No other mixtures showed azeotropic behavior at the experimental conditions.

4 Activity coefficients composition diagram of ○, isobutene + methanol; ×, isobutene + 1-propanol; +, isobutene + 2-propanol; ▵, iso-butene + 2-butanol; and, isobutene + 2-methyl-2-propanol at 364.5 K.

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“…The uncertainties in the correlated densities were less than 1.0 % for 2-methylpropane, methanol, 1-propanol, 2-propanal, and 2-methyl-2-propanol and less than 3.0 % for 2-butanol. The derivation of the maximum error for the injected mole amount is presented in detail in refs and , and only the resulting equation is presented here. The theoretical maximum error for an injection is presented in eq 1: …”

“…The temperature derivative of density is calculated from the density correlation 17 and the compressibility of the liquid from the Hankinson−Brobst−Thomson model . The calculation of the theoretical maximum error in the overall molar composition differs from that presented in refs and . Its derivation is thus presented here.…”

Practical Methodology for Distillation Design using a Miniplant

“…1 were used. The literature study led to the conclusion that measurements were needed for six binary systems, TBA +: -2, 4, 4-trimethyl-1-pentene [12,15]; -2-methylpropene [16]; -cis-2-butene [17]; -trans-2-butene [18]; -2-methylpropane; -n-butane.…”

Phase equilibrium measurements for systems containing propanenitrile with tert-butyl ethyl ether and C4-hydrocarbons

“…The automated static total pressure apparatus The setup of the static total pressure apparatus and the experimental procedure are described in detail in the article by Uusi-Kyyny et al [6]. The description of the automation of the apparatus can be found in Ouni et al [7]. The equilibrium cell (total volume of 103.33 cm 3 ) was immersed in a water bath (approximately 70 dm 3 in volume).…”