Biodegradable complexing agents for heavy metals
AssigneeCooperatie Cosun U.A.
InventorsMariëtte Ellen Boukje Bolkenbaas, Hendrika Cornelia Kuzee, Henricus Wilhelmus Carolina Raaijmakers
Life of this patent
Estimating the term…
Abstract
Heavy metals including lead, copper, zinc, and cadmium, are effectively extracted from sludge mixtures by treatment of the mixture with carboxyl derivatives of fructans, having a degree of substitution of 0.2-3.0.
Claims6
A process for the removal of heavy metals selected form zinc, cadmium, mercury, tin, lead, copper, silver, nickel, and chromium, and arsenic, from a mixture comprising the step of contacting the mixture with an organic complexing agent comprising a straight-chain or branched carboxyfructan containing 0.2 to 3.0 carboxyl group per monosaccharide unit in the fructan to capture the heavy metals or arsenic, and separating the complexing agent from the mixture.
Dependencies are inferred from the claim text.