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US 2018/0021499 A1Published application
Urea sequestration compositions and methods
AssigneeCabot Corporation
InventorsMichael J. Natan, Agathagelos Kyrlidis
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Abstract
Graphene-based materials for sequestering urea from aqueous solutions are provided. The graphene-based materials include graphene aggregates as well as graphene oxides.
Claims18
A method comprising:
- contacting a fluid comprising urea with a mass of graphene-based material particles;
- sorbing at least a portion of the urea into or onto the graphene-based material particles to produce a graphene-based material/urea complex;
- and
- reducing the level of urea in the fluid wherein the amount of urea in the graphene-based material/urea complex is greater than 25 mg urea per gram of graphene-based material.
1 more element
(canceled)
10-14. (canceled)
A method comprising:
- contacting a dialysate with graphene-based material, the dialysate comprising urea;
- sorbing at least a portion of the urea on or in the graphene-based material to form a graphene-based material/urea complex;
- reducing the concentration of urea in the dialysate by greater than 25%, wherein the graphene-based material/urea complex comprises at least 10% urea by weight.
22-54. (canceled)
Dependencies are inferred from the claim text.