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US 12,623,171 B1Granted
Method of cleaning a fouled reverse osmosis membrane
AssigneeKing Fahd University of Petroleum and Minerals
InventorsMajad Khan, Asif Matin, Nadeem Baig
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Abstract
A method of cleaning a fouled reverse osmosis (RO) membrane using a comb-shaped polymer which includes dissolving the comb-shaped polymer and a base in water to form a solution, contacting the fouled RO membrane with the solution to produce a cleaned RO membrane. The comb-shaped polymer includes reacted units of poly(isobutylene-alt-maleic anhydride) and an oligoethylene amine where, the oligoethylene amine is triethylenetetramine, tetraethylene pentaamine, or pentaethylenehexamine.
Claims19
A method of cleaning a fouled reverse osmosis membrane, comprising:
- dissolving a comb-shaped polymer and a base in water to form a solution;
- contacting the fouled reverse osmosis membrane with the solution to produce a cleaned reverse osmosis membrane,
- wherein the comb-shaped polymer comprises reacted units of poly(isobutylene-alt-maleic anhydride) and an oligoethylene amine,
- wherein the oligoethylene amine is one or more selected from the group consisting of triethylenetetramine, tetraethylene pentaamine, and pentaethylenehexamine, and
- wherein the fouled reverse osmosis membrane comprises a reverse osmosis membrane and a foulant.
2 more elements
Dependencies are inferred from the claim text.