Patent ID: 9604153
Date: 2017-03-28
CPC Classifications: B01D,B01J,C07C,H01L

Claim:
1. A system comprising: a chamber comprising a solvent mixture comprising NMP and ethylene glycol; a pump fluidically coupled to the chamber at a first port of the chamber; a controller electrically coupled to the pump and configured to provide a supercritical fluid stream using the pump at an effective temperature and pressure to the solvent mixture in the chamber to remove and separate at least about 75% by weight or by volume of the NMP, based on the total weight of the solvent mixture or the total volume of the solvent mixture respectively, from the solvent mixture; and a collection vessel fluidically coupled to a second port of the chamber and configured to receive the separated and removed NMP in the supercritical fluid stream exiting the second port of the chamber.