The determination of some aliphatic alcohols and aldehydes by oxidation with acid potassium dichromate

Section: Methodsmentioning

confidence: 99%

Liquid−Liquid and Solid−Liquid Equilibrium of the Ternary System Ethanol + Cesium Sulfate + Water at (10, 30, and 50) °C

Zhai

Liu

et al. 2003

“…The amount of the propan-1-ol or propan-2-ol was determined using the oxidation process, and the K 2 Cr 2 O 7 was used as oxidant. , The reproducibility of the determination of the propan-1-ol or propan-2-ol mass fraction was less than ± 0.5 %. The solid phase in equilibrium was filtered carefully and analyzed using TGA (performed on a TA-SDT Q600 thermal analyzer in air atmosphere with a heating rate of 10 °C /min).…”

Section: Methodsmentioning

confidence: 99%

Equilibrium Phase Behavior of Water + Propan-1-ol or Propan-2-ol + Cesium Chloride at (298.15, 308.15, and 318.15) K

Jin

Jiang

2005

The liquid-liquid equilibrium in the aqueous biphasic system formed by water + propan-1-ol + cesium chloride and water + propan-2-ol + cesium chloride have been determined at (298.15, 308.15, and 318.15) K. The tie lines and binodal curves as well as refractive index were measured on solutions. The LLE equilibrium experimental data were correlated using Othmer-Tobias and Bancroft correlations. The effect of temperature on the liquid-liquid equilibria was insignificantly.

“…The concentration of rubidium salt in the equilibrium solid or liquid phases was determined by tetraphenylboron rubidium gravimetrical analysis 7 or alternatively by evaporating the solution to dryness at a temperature that was lower than the decomposition temperature of each rubidium salt. The potassium dichromate oxidation method , was adopted to measure the ethanol content in the equilibrium phases. The uncertainties in the mass fraction measurements of the rubidium salt and ethanol were estimated to be ±0.1 % and ±0.5 %, respectively.…”

Section: Methodsmentioning

confidence: 99%

Multiphase Equilibrium Behaviors of Rubidium Salts (RbCl, RbNO₃, Rb₂SO₄, and Rb₂CO₃) in Aqueous Ethanol Mixture at 298.15 K

Zhang¹,

Wang²,

Song³

et al. 2005

Rubidium salts (RbCl, RbNO 3 , Rb 2 SO 4 , and Rb 2 CO 3 ) + water + ethanol systems have been comparatively investigated and discussed. The solubilities and mutual miscibilities decrease with increasing ethanol content in the systems. The equilibrium solid phases for the RbCl-, RbNO 3 -, and Rb 2 SO 4 -containing systems are simple nonhydrates, but that of the Rb 2 CO 3 -containing system is Rb 2 CO 3 ‚2H 2 O. Rb 2 CO 3 can make the miscible aqueous ethanol mixture split, and the three others cannot. An empirical formula was proposed to correlate the experimental data, and the phase diagrams were constructed. An explanation for the experimental results based on molecular structure is postulated.