Patent ID: 6339039
Filing Date: 2002-01-15
Classification: B01J

Abstract:
Process for production of a hydrogel product for adsorption purposes comprising a water insoluble support matrix and cross-linked polymers, wherein the support matrix comprises agar, agarose or derivatives thereof and said cross-linked polymers comprise a first layer of a first soluble polymer material chemically bound to and surrounding the support matrix, and a second layer of an additional polymer material surrounding said first layer and bound thereto, wherein optionally the support matrix is an acid- and base-stable residue; wherein in said process polyalkylene imine chains A1 are incorporated into the support matrix which thereafter is activated and at the same time cross-linked with a cross-linking agent X1 whereupon the product is coupled to a new alkyleneimine A2 which thereupon is activated with X2, or polyalkylene imine chains A1 are incorporated into the support matrix whereupon the product is reacted with a mixture of cross-linking agents polyamine and non-reacted reaction products are removed from a solid phase through washing.