Solubility of some light hydrocarbons and hydrogen in some organic solvents

Abstract

The solubilities of hydrogen and some light hydrocarbons in n-hexane, toluene, and 1,2-dichloroethane at pressures of 1 atm. or less and temperatures of -23°to 25°C. were determined. The data were compared with published values, and discrepancies for hydrogen in 1,2-dichloroethane and for ethylene in toluene in the existing literature resolved. Relevant vapor pressures of the solvents were also measured.The SOLUBILITIES of hydrogen, ethylene, ethane, and propane in binary systems with toluene, as well as the solubilities of hydrogen and ethylene in n-hexane and 1,2-dichloroethane, are reported here. Some of the data are new, whereas others resolve discrepancies in existing literature data. Some new vapor pressure data for 1,2-dichloroethane were also obtained. EXPERIMENTALApparatus and Procedure for Measuring Solubilities. Two

Synthesis of electron-withdrawing butane- and arene-sulfonylamino phosphines and use in rhodium-catalyzed hydroformylationDedicated to the memory of Mohammad Salman Hamdani. Sal worked in our labs at Queens College as an undergraduate student from 1998–2001, and died as part of the rescue effort at the World Trade Center in New York City, September 11, 2001.Electronic supplementary information (ESI) available: details of the syntheses, purification, and NMR and analytical data. See http://www.rsc.org/suppd

“…We therefore measured CO solubilities in a manner based on that described in the literature, 19,20 using a simple vacuum line/manometer set-up. 21 For N 2 and CO in toluene, we reproducibly obtained values that were 7% higher than reported. 16 Because the vapor pressures of THF and CH 2 Cl 2 Fig.…”

“…Minor effects that were quantified were the volume of the stir bar, and the variable known volume due to the changes in the height of the mercury column. More major effects that were not well controlled were the difference in gas and solvent temperature, although successful use of such a set-up has been reported; 21 the solvent was stirred in a thermostatted water bath, while the gas temperature was approximated as that of the lab, rather than holding the entire apparatus in a thermostatted compartment. 19…”

Hydrogen evolution catalyzed by electrodeposited nanoparticles at the liquid/liquid interface

“…) at 1 atm, 19 we can estimate that only about 0.11 micromoles of H 2 remain dissolved in both liquid phases.…”

Gold oxide films grown in the confined aqueous layer between gold and organic solvents

“…Many investigations report a solubility of hydrogen 10 times higher in hexane than in water and intermediate value in polar organic solvents [59][60][61][62][63][64][65][66]. This may strongly influence the phenomenon under study, capturing a significant quantity of hydrogen and maintaining it in a very strategic position.…”