Crosslinked polymers and a method for heavy metal ion removal
AssigneeKing Fahd University of Petroleum and Minerals
InventorsOthman Charles Sadeq Al Hamouz, Mohammed Estatie, Tawfik Abdo Saleh Awadh, Mohamed A. Morsy
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Abstract
A crosslinked polymer that is in the form of a Mannich polycondensation product including reacted units of a cyclic diaminoalkane, an aldehyde, and bisphenol-S or melamine. Also disclosed is a method for removing heavy metals from an aqueous solution by contacting the aqueous solution having an initial concentration of the heavy metal with the crosslinked polymer to form a mixture, and filtering the mixture to obtain an aqueous solution having a reduced concentration of the heavy metal compared to the initial concentration.
Claims18
A crosslinked polymer, in the form of a Mannich polycondensation product comprising reacted units of
- a first monomer of formula (I)
- or a salt thereof, a solvate thereof, a stereoisomer thereof, or a mixture thereof;
- a second monomer, which is at least one selected from the group consisting of melamine and a bisphenol-S compound represented by formula (II)
- or a salt thereof, a solvate thereof, a tautomer thereof, a stereoisomer thereof, or a mixture thereof;
- and
- an aldehyde of formula (III)
- or a salt thereof, a solvate thereof, a stereoisomer thereof, or a mixture thereof, wherein:
- m is 2 or 3;
- and
- n is 2 or 3;
- wherein when the second monomer is melamine the crosslinked polymer has X number of repeating units of formula (IV);
- wherein X is 2 to 10,000;
- wherein * represents an amino site of an additional melamine ring;
- wherein when the second monomer is the bisphenol-S compound represented by formula (II) the crosslinked polymer has Y number of repeating units of formula (V);
- wherein Y is 2 to 10,000;
- wherein the crosslinked polymer has a BET surface area in the range of 10-80 m2/g.
Dependencies are inferred from the claim text.