Volumetric Properties of a Binary Mixture Composed of N,N-Dimethylcyclohexylamine and Alcohols

Abstract

The densities of six binary systems containing N,N-dimethylcyclohexylamine (DMCA) and ethanol, n-propanol, iso-propanol, n-butanol, iso-butanol, or tert-butanol were reported in this work at temperatures ranging from (288.15 to 318.15) K and atmospheric pressure. According to the experimental density values, molar volume (V m), thermal expansion coefficient (α p ), and excess molar volume (V m E) were calculated. The results showed that V m E values were all negative over the entire composition. The minimum values of the six systems at 298.15 K were located at (−1.097, −1.094, −0.900, −1.033, −1.154, and −1.073) cm3·mol–1 at about x DMCA = 0.4, respectively. All these are dependent on intermolecular interactions and the steric structural effect. Furthermore, V m E variations with composition (x DMCA) as well as temperature were well fitted with the Redlich–Kister-type polynomial equation.

Extraction of phospholipids from beta‐serum using switchable solvents and solid‐phase extraction

“…Further increment of the temperature (60 C, Figure 2c) resulted in extraction yield of MPLs of 14.86 ± 2.95%, 69.79 ± 3.19%, 79.39 ± 5.55% after 3, 10, and 18 h and a ratio of 1/18. Such an observation contradicts earlier reports (Alshamrani et al, 2016;Zhao et al, 2020), suggesting that the conversion of CyNMe2 into its respective salt is favored at room temperature. It is important to highlight that the chemical equilibrium of the acid-base reaction is influenced by the temperature, CO 2 concentration, molar concentration of the amine, and the composition of the matrix, according to the Le Chatelier principle (Rathnakumar, Osorio-Arias, et al, 2021).…”

Volumetric Properties of Binary Mixtures Consisting of Amines and Acetonitrile at Different Temperatures and 101 kPa

“…The density values for pure compounds, ACN, DMHA, DMCHA, TMPDA, TMBDA, and PMDETA, at T = 288.15–323.15 K and 101 kPa are reported and compared with literature values in Table S1. The deviations of 100­(ρ Exp – ρ Lit )/ρ Exp are calculated, and the results are presented in Figure . − The measured density values are in good agreement with literature works, and the discrepancies are ≤0.15% (except for refs and ). All the differences may be attributed to the purity of compounds and the methods of measurement.…”

Molecular simulation of activity coefficients and the phase diagram of CH3OH-CO2 binary system

“…For efficient and sustainable industrial processes, rational design of separation operations is essential. This requires knowledge of the activity coefficients of fluid mixtures and phase diagrams [1][2][3][4]. Therefore, although studies of catalysis [5][6][7][8][9][10][11][12][13], reactions [6,14], various properties of molecules [15][16][17][18][19][20] and aggregates [21,22] and design of new materials [23][24][25][26][27][28] for specific applications [29,30] have garnered a lot of attention, considerable efforts have been devoted to the studies of binary systems [31,32].…”