Functionalized cationic polyamines and their use to reduce the ndma formation during the treatment of aqueous systems, and applications in the water treatment industry, including wastewater and drinking water treatment processes
AssigneeS.P.C.M. SA
InventorsCedrick Favero, Amelia E. Taylor
Life of this patent
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Abstract
New water treatment chemicals and corresponding water treatment or more generally aqueous systems treatment processes are provided, which greatly attenuate the NDMA problem, that is, decrease the formation of NDMA during the water or aqueous system treatment namely in the presence of a disinfectant, and decrease too the level of NDMA in the so treated water of the aqueous system, and in the end products such as drinking water.
Claims21
1-12. (canceled)
A polymer that is a water-soluble cationic polyamine having at least one end group that is a residue of at least one alkylating agent.
A process of making a polymer that is a water-soluble cationic polyamine having at least one end group that is a residue of at least one alkylating agent, comprising producing a polyamine by reacting:
- a) at least a secondary amine, and
- b) at least a difunctional epoxide,
- and end-capping said polyamine with at least one alkylating agent.
A method of reducing the formation and/or level of NDMA in water or an aqueous-based system, comprising adding to the water or aqueous-based system an appropriate amount of a polymer that is a water-soluble cationic polyamine having at least one end group that is a residue of at least one alkylating agent.
Dependencies are inferred from the claim text.