Ethylene oligomers solvent extraction

This silane polymer was found to be virtually insoluble in carbon dioxide at pressure and temperature levels up to 552 bar (8,000 psia) and 120°C, respectively. Additionally, it was difficult to solubilize in supercritical ethylene and ethane at the same conditions. Supercritical propane proved to be a better solvent, and the extraction of the low molecular weight oligomers was accomplished at conditions of 483 bar (7,000 psia) and 120°C. 

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