Polysaccharide-polyamine copolymers for removal of phosphate
AssigneeHoward University
InventorsJames W. Mitchell, Dazhi Yang
Life of this patent
Estimating the term…
Abstract
Covalently cross-linked copolymers are described herein. More specifically, polysaccharide-polyamine copolymeric matrices or structures and cationic copolymeric matrices are described herein. The polysaccharide-polyamine copolymers, when protonated, can form cationic copolymeric matrices having exceptionally high densities of cationic sites. In one form, the covalently cross-linked copolymers provide a three-dimensional structure, especially when hydrated.
Claims17
A polysaccharide-polyamine copolymer having an amino functionality which will provide a protonatable copolymeric material having a three-dimensional structure with cationic sites through protonation, the polysaccharide-polyamine copolymer comprising:
- a selectively oxidized polysaccharide having a 2,3-dialdehyde moiety;
- and
- amino polymers which provide an amino functionality, the amino polymers cross linking the oxidized polysaccharides to provide a particulate polysaccharide-polyamine copolymer having an amino functionality which when protonated will provide the cationic copolymeric material with a nitrogen content of at least 12.3 wt. %, both the polysaccharide-polyamine copolymer and cationic copolymeric material being water insoluble,
- wherein the amino polymers are in a branched or dendritic form.
Dependencies are inferred from the claim text.