Amineaffects the absorption performance and energy cost forCO2 capture with chemical solvents. To searchthe desirable amine solvents with higher absorption rate andlower energy penalty would be a challenge task. In the presented study, the CO2 absorption performance for3-(Diethylamino)propylamin...

The vapour pressures of liquid (3-diethylaminopropylamine (3-DEPA) + n-heptane) mixtures were measured by a static method between T = (303.15 and 343.15) K at 10 K intervals. The molar excess enthalpies HE at T = 303.15 K were measured for the systems {3-DEPA + CnH2n+2 (n = 6, 7, 12)}. The molar...

The vapour pressures of liquid {3-diethylaminopropylamine (3-DEPA) + cyclohexane} were measured by a static method between T = (273.15 and 363.15) K at 10 K intervals. The excess molar volumes VE at 298.15 K and excess molar enthalpies HE at 303.15 K were also measured. The molar excess Gibbs fr...

In this work, the stopped-flow technique is used to determine the kinetics data in terms of pseudo first-order rate constants (k0) for the homogenous reaction of CO2 into aqueous solutions of 3-dimethylaminopropylamine (DMAPA) and 3-diethylaminopropylamine (DEAPA) as amine concentrations ranged ...

In this paper, the influence of 2-ethylhexanol used as a modifier/emulsifier on the surface chemical property of low rank coal and its flotation performance was investigated. According to the FTIR analysis, it showed an obvious decline in the hydrophilic groups while an increase in the hydrophob...

The nitration process of 2-ethylhexanol (2-EH) with mixed acid was studied in different capillary microreactors. The conversion of 2-EH and selectivity to 2-ethylhexyl nitrate (EHN) were investigated by varying reaction temperature, molar ratio of nitrate to 2-EH, residence time and water conten...

A systematic investigation on the extraction of boron from salt lake brine using 2-ethylhexanol as the extractant is reported with an emphasis on the extraction thermodynamics and extraction process design in order to obtain high purity boron product. The extraction parameters were optimized wit...

This paper describes the use of TEHA for HCl recovery from a leach solution generated by a hydrometallurgical plant. Four organic extractants were tested including TEHA, Alamine 336, Cyanex 923 and TBP. TEHA organic system performed best in terms of acid extraction, stripping and scrubbing effic...

Fluorescence behavior is reported for 13 alternant and 12 nonalternant polycyclic aromatic hydrocarbons (PAHs) dissolved in aqueous micellar cetyltrimethylammonium chloride (CTAC)+dodecylpyridinium chloride (DDPC) and sodium dodecylsulfate (SDS)+DDPC mixed surfactant solvent media. Experimental ...

Binding of dodecylpyridinium chloride to poly(styrene sulfonate) in ethanol-water mixed solvent was measured by a surfactant-selective electrode which consists of polymeric materials only and thus shows a good electrode performance even in mixed solvent. It was found that both intrinsic binding ...

Eight organoclays were prepared from sodium-rich bentonite and dodecylpyridinium chloride loading levels of 0.25–2.00 times the cation exchange capacity (CEC). The organoclays were characterized by the specific surface area, X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (...

A study was undertaken to determine the influence of temperature and electrolyte concentration on the adsorption of dodecylpyridinium chloride (DPC) on Na-kaolinite. Enthalpies were measured using an isothermal microcalorimeter by titration of a kaolinite suspension with a concentrated surfactan...

Electrical conductivity of aqueous 1-dodecylpyridinium chloride (DPC) was measured at temperatures 25, 30, 40 and 50 °C. The conductivity data were analyzed in the light of mixed electrolyte mass-action model for surfactant solutions wherein ion–ion interactions are accounted for by the Debye–...

This is the first study investigating the effect of cationic surfactants on the mobility of polycyclic aromatic hydrocarbons (PAHs) in aged contaminated soils and on PAH bioaccumulation in tuberous vegetables. In an aerobic soil incubation experiment, 150 mg/kg cetyltrimethyl ammonium bromide (C...

Viscosity and conductivity measurements have been made, in a series of concentrations and temperatures, to study the effect of phenol on the micellar growth of 1-dodecylpyridinium chloride (DPC) up to very high surfactant concentration. From the data the first and second critical micelle concent...

The isothermal ternary phase diagram for the 1-dodecylpyridinium bromide (1-DPB)–water–dodecanol system was determined at 40°C, using2H NMR, polarizing microscopy, and SAXS methods. All of the phases were characterized, and their ranges of existence were determined. The surfactant is easy to ...

The isothermal ternary phase diagram for the 1-dodecylpyridinium bromide/dodecane/water system was determined at 40°C by2H NMR and polarizing microscopy methods. Two liquid crystalline phases, a large cubic area and a normal hexagonal phase, and one isotropic normal micellar solution phase were...

Absorption spectra in the ultra-violet and visible regions of the spectrum have been obtained of solutions in methanol and chloroform of N,N'-bis-(o-hydroxybenzylidene)ethylenediamine and N,N'-bis-(o-hydroxybenzylidene)-o-phenylenediamine and their chelates with iron, cobalt, nickel, c...

The work described here deals with the performance of ethylenediamine N,N′-dibenzylidene, ethylenediamine N,N′-di(p-methoxybenzylidene), ethylenediamine N,N′-disalicylidene as corrosion inhibitors for zinc in sulphuric acid. The effect of various parameters on the efficiency of these inhibito...

SummaryThe discovery of new leads acting via novel modes of action in the treatment of the human immunodeficiency virus (HIV), the causative agent of AIDS, remains a challenge. Along this line we synthesized and evaluated a series of N-substituted 4-aminophthalimides which were designed accordin...