Cross-linked diallyl quaternary ammonium salt tetrapolymers and methods thereof
AssigneeKing Fahd University of Petroleum and Minerals
InventorsShamsuddeen Abdullahi Haladu, Shaikh Asrof Ali, Tawfik Abdo Saleh
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Abstract
Cross-linked tetrapolymers made up of different diallyl zwitterionic diallyl quaternary ammonium salt monomers, with one of them functioning as a cross-linking monomer. The cross-linked terpolymers include a repeating unit with multiple ligand centers that different metal ions can bind to. The cross-linked tetrapolymers are cationic, zwitterionic and anionic, and can be in either an acidic form or a basic form. A method of removing metal ions from an aqueous solution with these cross-linked tetrapolymers is also described.
Claims18
A cross-linked tetrapolymer comprising a repeating unit of four zwitterionic diallyl quaternary ammonium salt monomers having one of the following Formulas 1 or 2:
- wherein X is F, Cl, Br, I, NO3 or other suitable anion;
- M is Li, Na, K or other suitable cation;
- R1, R2 and R3 are independently substituted or unsubstituted alkyl or aryl groups having 1-6 carbon atoms;
- wherein the four monomers are present in the tetrapolymer at a molar ratio of x1:x2:x3:y;
- x1, x2 and x3 are each 30-32, y is 4-10 and
- wherein the repeating unit comprises a plurality of ligand centers and one of the four monomers is a cross-linking monomer.
Dependencies are inferred from the claim text.