Patent ID: 9023413
Filing Date: 2015-05-05
Classification: A23L,A23V,B01D

Abstract:
1. A method comprising: (a) providing a volume of proanthocyanidin-containing liquid feedstock; (b) passing the volume of proanthocyanidin-containing liquid feedstock to an ultrafiltration feed tank; (c) filtering a portion of the volume of liquid feedstock in the ultrafiltration feed tank through an ultrafiltration membrane system to fractionate the liquid feedstock into a proanthocyanidin-reduced permeate stream and a proanthocyanidin-enriched retentate stream; (d) collecting the proanthocyanidin-reduced permeate stream; (e) recycling the proanthocyanidin-enriched retentate stream to the ultrafiltration feed tank, to thereby form a mixture of proanthocyanidin-containing liquid feedstock and proanthocyanidin-enriched retentate stream; and repeating steps (c), (d), and (e), until the volume of proanthocyanidin-containing liquid feedstock is exhausted and thereafter collecting the proanthocyanidin-enriched retentate stream.