Loading patent…
AssigneeX-Flow B.V.
InventorDirk M. Koenhen
Estimating the term…
The invention relates to a microfiltration and/or ultrafiltration membrane consisting of a polymer having nominal pores of 0.001-10 .mu.m. The special feature of the membranes according to the invention is that the matrix of the membrane incorporates an active adsorbent which is preferably polyvinyl pyrrolidone. Usually the polyvinyl polypyrrolidon is present in the membrane in an amount of 5-90% by weight and preferably in an amount of 30-70% by weight. Preferably the membrane is hydrophilic and is usually asymmetric or is constructed of different layers. The nominal pore size of the membrane is 0N05--5 .mu.m and preferably 0.2-1.0 .mu.m, while the membrane is tubular, flat or capillary. Furthermore, the invention relates to a method of preparation of the membrane and to a method of filtration of undissolved components from a liquid and/or the simultaneous adsorption of dissolved components from the liquid by means of the membrane, the method according to the invention is especially suitable for the removal of components causing turbidity from a liquid, especially beer.
A microfiltration and/or ultrafiltration membrane including a polymer forming a matrix and having nominal pores of 0.001-10 .mu.m, wherein the matrix of the membrane incorporates polyvinyl polypyrrolidonee as an active adsorbent.
A method of preparing a membrane comprising
A method of filtering undissolved components or adsorbing dissolved components from a liquid comprising contacting the liquid with a membrane including a polymer forming a matrix and having a nominal pores of from 0.001-10 .mu.m,wherein the matrix of the membrane incorporates polyvinyl polypyrrolidone as an active adsorbent,wherein the undissolved or dissolved components are periodically remove by regeneration of the membrane.
A method of removal of components causing turbidity from a liquid by means of a membrane including a polymer forming a matrix having nominal pore of from 0,001-10 .mu.m, wherein the matrix of the membrane incorporates polyvinyl polypyrrolidone as an active adsorbent, said membrane is an asymmetric membrane having a pore structure such that the pores at the membrane's feed side are larger than the nominal pore size, and the pores of nominal pore size occur in the section toward the permeation side, comprising contacting the liquid with said membrane, separating undissolved components by said membrane, and flushing back the membrane to carry away undissolved components.
Dependencies are inferred from the claim text.