US 9,006,299 B2Granted

Method for removal of metal ions from an aqueous solution

AssigneeKing Saud University

InventorsSaad M. Alshehri, Tansir Ahamad

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Abstract

The present invention relates to a method for removal of metal ions from an aqueous solution, which comprises contacting the aqueous solution with a phosphazene-formaldehyde resin as well as an ion exchange resin comprising a phosphazene-formaldehyde resin.

Claims9

Dependent claims

Method for removal of metal ions from an aqueous solution, which comprises:

reacting hexaminocyclotriphosphazene hexammoniumchloride ({NP(NH2)2}3.6NH4Cl) and formaldehyde (HCHO) in an aqueous environment to form a phosphazene-formaldehyde resin;
and
contacting the aqueous solution with the phosphazene-formaldehyde resin.

Dependencies are inferred from the claim text.

Facts

Application: 13/521,507Filed 12 Jul 2011
Published: US 2014/0148521 A129 May 2014
Granted: 14 Apr 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

B01J 39/19
Macromolecular compounds: obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds
B01J 39/04
Cation exchange; Use of material as cation exchangers; Treatment of material for improving the cation exchange properties: processes using organic…
B01J 41/04
Anion exchange; Use of material as anion exchangers; Treatment of material for improving the anion exchange properties: processes using organic…
B01J 41/13
Macromolecular compounds: obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds

Family

US 2014/0148521 A1Pre-grant publication · published 29 May 2014
US 9,006,299 B2This patent

From the US filing history. Foreign family members aren’t listed.

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