Method for removing chromium from water using ion exchange resins including interpenetrating polymer networks
AssigneeDow Global Technologies LLC
InventorsDaryl J. Gisch, Jing Jin
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Abstract
The invention includes ion exchange resins and their use in the removal of chromium from water. In one embodiment, the invention comprises a method for removing chromium from a water source by contacting the water with an ion exchange resin, wherein the ion exchange resin comprises particles of a crosslinked copolymer comprising: an interpenetrating polymer network (IPN) of at least two polymer components each having a styrenic content greater than 50 molar percent, and a quaternary ammonium functionality.
Claims9
A method for removing chromium from a water source having a chromium concentration from 10 ug/L to 5000 ug/L and a pH of at least 6.5;
- comprising the steps of:
- providing an ion exchange resin, wherein the ion exchange resin comprises particles of a crosslinked copolymer comprising:
- an interpenetrating polymer network (IPN) of at least two polymer components each having a styrenic content greater than 50 molar percent, and a quaternary ammonium functionality;
- and contacting the water source with the ion exchange resin.
Dependencies are inferred from the claim text.