Patent ID: 7396549
Filing Date: 2008-07-08
Classification: C12G,C12P

Abstract:
1. A method for producing oenological tannins from lumps of wood, which comprises the steps of bringing the wood into contact with an aqueous enzymatic composition containing one or more cellulase class enzymes; filtering the composition to obtain a liquid extract therefrom; and lyophylizing the liquid extract to afford a solid composition comprising oenological tannins; wherein the enzymatic composition comprises one or more enzymes selected from the group consisting of cellobiohydrolases, endoglucanases, β-glucosidases, hemicellulases, α-amylases, xylanases, β-mannanases, endocellulases, and mixtures of these enzymes; wherein the enzymatic composition comprises an endocellulase activity, a xylanase activity, a β-mannanase activity, and an α-amylase activity, and includes one or more enzyme activities selected from the group consisting of: an endocellulase activity between 10×10 6 and 1×10 9 ECU per tonne of wood to be treated, a xylanase activity between 6×10 6 and 0.6×10 9 BXU per tonne of wood to be treated, a β-mannanase activity between 4×10 6 and 0.4×10 9 MNU per tonne of wood to be treated and an α-amylase activity between 10×10 6 and 1×10 9 αTU per tonne of wood to be treated.