Removing bivalent ions from produced water
AssigneeSaudi Arabian Oil Company
InventorsAndrey Kovalskii, Anton Manakhov, Madina Baltaeva, Maxim Orlov, Fahd Ibrahim AlGhunaimi, Norah Aljuryyed
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Abstract
A system and a method for purifying a produced water using a nanomembrane formed from polymeric waste are provided. The method includes placing the nanomembrane into an aqueous solution, wherein a surface of the nanomembrane is functionalized with carboxyl groups. Carbon dioxide is injected into the aqueous solution, and bivalent alkaline earth cations are adsorbed on the surface of the nanomembrane in the presence of carbonate ions (CO32−) to form carbonate crystals on the surface of the nanomembrane.
Claims19
A method directed to purifying a produced water using a nanomembrane formed from polymeric waste, comprising:
- placing the nanomembrane into an aqueous solution, wherein a surface of the nanomembrane is functionalized with carboxyl groups;
- injecting carbon dioxide into the aqueous solution;
- and
- adsorbing bivalent alkaline earth cations on the surface of the nanomembrane in a solution comprising carbonate ions (CO32−) to form carbonate crystals on the surface of the nanomembrane.
A system for using a functionalized membrane for adsorbing bivalent cations, comprising:
- a carrier comprising fibers with a high specific surface area;
- carboxyl groups attached on the surface of the fibers;
- and
- a mount to hold the carrier in a wastewater stream.
Dependencies are inferred from the claim text.