Patent ID: 9333481
Filing Date: 2016-05-10
CPC Classification: B01J

Claim Text:
1. A depth filter layer, produced from cellulose fibres and/or derivatives thereof, at least one inorganic layer double hydroxide, and at least one organic wet strength agent, wherein the depth filter layer is produced from a mixture comprising a content by weight of the at least one inorganic layer double hydroxide of 10-65%, a content by weight of the cellulose fibres and/or derivatives thereof of 30-80% and a content by weight of the organic wet strength agent of 0.5-10%, based on the total weight of the mixture, and wherein the at least one organic wet strength agent reacts with carboxyl and/or OH groups of the cellulose fibres and/or derivatives thereof and the at least one inorganic layer double hydroxide to bridge components of the mixture to one another; wherein the at least one inorganic layer double hydroxide comprises particles with an average diameter between 0.5 μm and 100 μm; and wherein the depth filter layer is configured to bind nucleic acids adsorptively to the depth filter layer and to allow proteins to pass through the depth filter layer unimpeded.