Patent ID: 9545584
Date: 2017-01-17
CPC Classifications: B01D,B82Y,C01B

Claim:
1. A process for fractionating a nanoparticle composition, the process comprising: combining a first polymer, a second polymer, and a solvent to form a fluid; contacting the nanoparticle composition with the fluid, the nanoparticle composition comprising: forming a multiphase composition comprising a first phase and a second phase by partitioning the first polymer and the second polymer such that a concentration of the first polymer is greater than a concentration of the second polymer in the first phase, and the concentration of the second polymer is greater than the first polymer in the second phase, wherein the solvent is present in the first phase and the second phase; apportioning the first nanoparticles and the second nanoparticles among the first phase and the second phase to fractionate the nanoparticles composition, based on a relative affinity of the first nanoparticles articles and the second nanoparticles for the first polymer and the second polymer; after apportioning the first nanoparticles and the second nanoparticles, removing a portion of the first phase from the multiphase composition; forming a secondary multiphase composition comprising a plurality of phases by: apportioning the first nanoparticles in the portion among the plurality of phases in the secondary multiphase composition, wherein the first nanoparticles are present in the first phase and substantially absent in the second phase, and the second nanoparticles are present in the second phase and substantially absent in the first phase.