Patent ID: 11879031
Assignee: SOLENIS TECHNOLOGIES, L.P.
Field: Chemical engineering (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 16:
17. A method for the purification of poly-2-ethyl oxazoline (PEOx) comprising the steps of:
a) providing an aqueous solution containing one or more impurities and PEOx;
b) raising the temperature of the aqueous solution from a first temperature to a second temperature that is a lower critical solution temperature, wherein the aqueous solution separates into a water phase and a polymer rich phase;
c) separating the polymer rich phase from the water phase; wherein the polymer rich phase is more dense and contains a predominance of the PEOx polymer and the water phase contains a portion of the one or more impurities;
d) cooling the polymer phase to a third temperature allowing the polymer phase to return to an aqueous solution; and
e) optionally repeating steps b), c) and d).