DRAW SOLUTES, METHODS OF FORMING DRAW SOLUTES, AND METHODS OF USING DRAW SOLUTES TO TREAT AN AQUEOUS LIQUID
First Claim
1. A draw solute comprising:
- at least one phosphazene compound comprising the following chemical structure;
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Accused Products
Abstract
A method of treating an aqueous liquid. The method comprises providing an aqueous feed liquid comprising water and at least one solute to a first side of a membrane. A draw solution comprising water and a draw solute comprising at least one of a phosphazene compound and a triazine compound is provided to a second side of the membrane. At least a portion of the water of the aqueous feed liquid is osmosed across the membrane and into the draw solution to form a diluted draw solution comprising water and the draw solute. The water of the diluted draw solution is separated from the draw solute of the diluted draw solution to form a purified water product. Draw solutes comprising phosphazene compounds and draw solutes comprising triazine compounds are also disclosed, as are methods of forming the draw solutes.
14 Citations
21 Claims
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1. A draw solute comprising:
at least one phosphazene compound comprising the following chemical structure; - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A draw solute comprising:
at least one triazine compound comprising the following structure; - View Dependent Claims (9, 10, 11, 12)
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13. A method of treating an aqueous liquid, the method comprising:
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providing an aqueous feed liquid comprising water and at least one solute to a first side of a membrane; providing a draw solution comprising water and a draw solute comprising at least one of a phosphazene compound and a triazine compound to a second side of the membrane; osmosing at least a portion of the water of the aqueous feed liquid across the membrane and into the draw solution to form a diluted draw solution comprising water and the draw solute; and separating the water of the diluted draw solution from the draw solute of the diluted draw solution to form a purified water product. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A method of forming a draw solute, comprising:
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reacting a halogenated phosphazene compound with a nucleophilic compound to form a fully-substituted phosphazene compound; hydrolyzing the fully-substituted phosphazene compound to form an acidic phosphazene compound comprising acid-terminated pendant groups; and neutralizing the acidic phosphazene compound to form a phosphazene compound comprising salt-terminated pendant groups.
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Specification