On-line recovery of large molecules and concentration of small molecules using reciprocating size exclusion chromatography with temperature swing

Abstract

The reciprocating size exclusion chromatography (RSEC) was operated with swing between two temperatures in a synchronous way with flow direction to recover a large solute on-line from the mixture, in addition to the small solute concentration. The concentration of small solutes in RSEC with a temperature swing was made possible by taking advantage of the temperature-dependent swelling properties of the porous gel. After 7 cycles of frontal mode operation, 76% of Blue Dextran in the feed was recovered and nickel nitrate in the feed reservoir was concentrated by 13%.