Separation systems and methods of using them
AssigneeQuinlan Properties, LLC
InventorGeorge L Quinlan
Life of this patent
Estimating the term…
Abstract
Certain embodiments described herein are directed to separation systems and methods effective to separate two or more solvents in a solvent mixture. In certain examples, a system effective to separate two or more azeotrope forming solvents is provided. In some embodiments, the system can be effective to remove at least about 95% of one of the solvents from the solvent mixture.
Claims15
A method of removing at least about 75% by weight or by volume of NMP, based on the total weight of a solvent mixture or based on the total volume of the solvent mixture respectively, from the solvent mixture comprising NMP and ethylene glycol in a chamber, the method comprising:
- exposing the solvent mixture comprising the NMP and the ethylene glycol to a supercritical fluid stream of carbon dioxide at an effective temperature and pressure to remove at least about 75% by weight or by volume of the NMP, based on the total weight of the solvent mixture or based on the total volume of the solvent mixture respectively, from the solvent mixture comprising the NMP and ethylene glycol;
- and
- collecting the removed NMP in the supercritical fluid stream of carbon dioxide exiting the chamber.
Dependencies are inferred from the claim text.