Poly(zwitterion-alt-sulfur dioxide) copolymer
AssigneeKing Fahd University of Petroleum and Minerals
InventorsShaikh Asrof ALI, Shamsuddeen Abdullahi HALADU
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Abstract
The poly(zwitterion-alt-sulfur dioxide) copolymer includes a structural unit having the structural formula: The copolymer is made by cocyclopolymerizing 3-(N,N-diallyl,N-carboethoxymethylammonio)propanesulfonate with sulfur dioxide to obtain an intermediate polyzwitterion (PZ) copolymer, which is hydrolyzed to form the copolymer. The copolymer may be converted to a poly(electrolyte-zwitterion) by treatment with a base, such as sodium hydroxide.
Claims15
A poly(zwitterion-alt-sulfur dioxide) copolymer having the structural formula:
- or a salt thereof.
A method of making a poly(zwitterion-alt-sulfur dioxide) copolymer, comprising the steps of:
- cocyclopolymerizing 3-(N,N-diallyl,N-carboethoxymethylammonio)propanesulfonate with sulfur dioxide to obtain an intermediate polyzwitterion (PZ) copolymer having the formula:
- and
- performing acidic hydrolysis on the intermediate polyzwitterion (PZ) copolymer to obtain the poly(zwitterion-alt-sulfur dioxide) copolymer having the formula:
- or a salt thereof.
A method of preventing calcium sulfate (CaSO4) scale formation, comprising the step of adding an effective amount of a polyzwitterion (PZ) polyelectrolyte to an aqueous solution for preventing CaSO4 scale formation.
Dependencies are inferred from the claim text.