Effect of NaOH on the solubility of fluorocarbon in alcohol–NaOH systems

We propose a dechlorination process that allows safe and environmental conversion of chlorinated fluorocarbons. Starting with dissolving a fluorocarbon in an alcohol–NaOH solution, the fluorocarbons are reacted with alcohol–NaOH solvents at room temperature and pressure. In this work, the effect of...

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Bibliographic Details
Published in:Fluid phase equilibria 2010-05, Vol.291 (2), p.159-165
Main Authors: Nishiumi, Hideo, Ogasawara, Hiroki, Ago, Ken-ichi
Format: Article
Language:English
Subjects:
Applied sciences
Conversion
Electrolyte
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fluid dynamics
Fluid flow
Fluorocarbon
Fluorocarbons
Henry's constant
Methanol
NaOH
Phase equilibria
Refrigerants
Refrigerating engineering
Refrigerating engineering. Cryogenics. Food conservation
Salting-out
Setchenov relation
Sodium
Solubility
Solvents
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Summary:We propose a dechlorination process that allows safe and environmental conversion of chlorinated fluorocarbons. Starting with dissolving a fluorocarbon in an alcohol–NaOH solution, the fluorocarbons are reacted with alcohol–NaOH solvents at room temperature and pressure. In this work, the effect of the NaOH concentration on the solubility of CCl 2F 2 (CFC-12), CH 2F 2 (HFC-32), C 2HF 5 (HFC-125), C 2H 2F 4 (HFC-134a) and C 2H 4F 2 (HFC-152a) in methanol–NaOH, ethanol–NaOH and 1-propanol–NaOH solutions was measured. The experimental salting-out effects can be explained by solvation of a few alcohol molecules on sodium ion. Setchenov coefficients were determined and found to be independent of temperature.
ISSN:0378-3812
1879-0224
DOI:10.1016/j.fluid.2009.12.021