Solubility, in Supercritical Carbon Dioxide, of Paraffin Waxes Used as Binders for Low-Pressure Injection Molding
| Autor: | and Eric Delhomme, J.F. Baumard, Philippe Marteau, Thierry Chartier, Roland Tufeu, and Pascale Subra |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
chemistry.chemical_classification
Wax Chromatography Supercritical carbon dioxide Materials science General Chemical Engineering General Chemistry Polymer Molding (process) Industrial and Manufacturing Engineering Supercritical fluid chemistry Chemical engineering visual_art Phase (matter) visual_art.visual_art_medium Ceramic Solubility |
| Zdroj: | Industrial & Engineering Chemistry Research. 38:1904-1910 |
| ISSN: | 1520-5045 0888-5885 |
| Popis: | Paraffin waxes, commonly used as binders in ceramic-forming processes, can be removed from ceramic bodies with supercritical carbon dioxide. Therefore, the solubility of three industrial paraffin waxes (melting at 42, 52, and 62 °C, respectively) in supercritical CO2 was investigated. The concentrations of these paraffin waxes in the solvent-rich phase in equilibrium with the paraffin-rich phase were measured at 343 K in the pressure range 12−30 MPa by using infrared absorption spectroscopy. Some n-alcane−CO2 binaries were also investigated. A model was developed by analogy with polydisperse polymers in solvents. It relates the concentration of the paraffin waxes to the concentration of the pure n-alcanes for n-alcane−CO2 binary systems. This model gives accurate overall concentration values for paraffin−CO2 mixtures and reproduces the n-alcane distribution in the solvent-rich phase. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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