Processes for precipitating a polymer from a polymer-containing fluid are disclosed, which include providing a vessel housing a medium that provides one or more precipitation surfaces. A polymer-containing fluid, e.g., a polymer solution, dispersion or mixed solution/dispersion, and an anti-solvent can be introduced into the vessel so as to cause precipitation of at least a portion of the polymer on at least one of the precipitation surfaces. In some embodiments, the polymer contains one or more cyclic oligosaccharide moieties, such as one or more cyclodextrin moieties (e.g., α-cyclodextrin, β-cyclodextrin, and γ-cyclodextrin). The polymer can be any of a linear or branched polymer. The polymer can be any of polycation, a polyanion, or a non-ionic polymer. Also disclosed herein are precipitation surfaces with polymer precipitated thereon.
