Separation media, devices and applications thereof

Patent metadata

Field	Value
Publication number	US-12128394-B2
Application number	US-201816768344-A
Country	US
Kind code	B2
Filing date	Dec 4, 2018
Priority date	Dec 4, 2017
Publication date	Oct 29, 2024
Grant date	Oct 29, 2024

Abstract

In one aspect, separation media are described herein operable for removing one or more water contaminants, including NOM, fluorinated chemicals, and/or derivatives thereof. Briefly, a separation medium comprises a silica-containing granular support; and an oligomeric stationary phase forming a film on individual grains of the granular support. In some embodiments, the oligomeric stationary phase comprises oligomeric chains covalently bound to the individual grains.

First claim

The invention claimed is:

1. A separation medium for water purification comprising:
a silica-containing zeolite support; and
an oligomeric stationary phase coupled to individual grains of the silica-containing zeolite support, the oligomeric stationary phase comprising oligomeric chains covalently bound to silica moieties throughout bulk regions of the individual zeolite grains, wherein:
the individual grains have an average size range of 50 microns to 5,000 microns;
the oligomeric chains comprise 4 to 100 monomer units; and
the oligomeric chains include one or more cationic moieties for anion exchange and/or one or more anionic moieties for cation exchange.

2. The separation medium of claim 1 , wherein the oligomeric chains are not cross-linked.

3. The separation medium of claim 1 , wherein the oligomeric chains include one or more cationic moieties for anion exchange and the cationic moieties comprise quaternary ammonium groups.

4. The separation medium of claim 1 , wherein the individual grains have an average size range of 100 microns to 4,000 microns.

5. The separation medium of claim 1 , wherein the individual grains exhibit a bimodal or multimodal particle size distribution.

6. The separation medium of claim 1 , wherein the separation medium is chemically regenerable and reusable.

7. The separation medium of claim 1 , wherein the covalently bound oligomeric chains form a film on the individual grains.

8. The separation medium of claim 1 , wherein the oligomeric chains are covalently bound to the silica moieties of the individual zeolite grains directly via alkylene linkages.

Assignees

• Univ North Carolina Charlotte

Inventors

• Poler Jordan
• Amburgey James E
• Sahu Abhispa
• Eldred Tim B

Classifications

• C02F2101/36

  containing halogen · CPC title

• C02F2101/34

  containing oxygen · CPC title

• C02F2001/422

  using anionic exchangers · CPC title

• C02F1/42

  by ion-exchange (ion-exchange in general B01J) · CPC title

• B01J41/10

  Inorganic material · CPC title