Low temperature synthesis of aluminum hydr(oxide) inside porous media

Patent metadata

Field	Value
Publication number	US-10927016-B2
Application number	US-201916594925-A
Country	US
Kind code	B2
Filing date	Oct 7, 2019
Priority date	Sep 28, 2016
Publication date	Feb 23, 2021
Grant date	Feb 23, 2021

Abstract

Preparing a porous hybrid media includes contacting porous media (e.g., strong base ion-exchange media) with an aqueous solution including aluminum ions to yield a aluminum-ion-containing porous media, contacting the aluminum-ion containing porous media with a reducing agent to impregnate elemental aluminum in the porous media, and oxidizing the elemental aluminum to yield a porous hybrid media including aluminum hydr(oxide) impregnated in the porous media. In some cases, a pH of an aqueous mixture including the aluminum-ion-containing porous media may be adjusted to form a floc including aluminum hydroxide, and the aluminum hydroxide-containing porous media may be contacted with a reducing agent to yield a porous hybrid media including aluminum hydr(oxide) impregnated in the porous media. The porous hybrid media may advantageously be prepared at low temperature (e.g., room temperature).

First claim

What is claimed is:

1. A method of preparing a porous hybrid media, the method comprising:
contacting porous media with an aqueous solution comprising aluminum ions to yield a aluminum-ion-containing porous media;
contacting the aluminum-ion containing porous media with a reducing agent to impregnate elemental aluminum in the porous media; and
oxidizing the elemental aluminum to yield a porous hybrid media comprising aluminum hydr(oxide) impregnated in the porous media.

2. The method of claim 1 , wherein the aluminum ions are derived from aluminum chloride.

3. The method of claim 1 , wherein the reducing agent comprises borohydride.

4. The method of claim 1 , wherein preparing the porous hybrid media occurs at room temperature or a temperature less than about 40° C.

5. The method of claim 1 , wherein the porous media comprises strong base ion-exchange media.

6. The method of claim 1 , wherein an aluminum content of the porous hybrid media is between 2 wt % and 3 wt %.

7. The method of claim 1 , wherein the aluminum hydr(oxide) comprises γ-Al 2 O 3 , amorphous Al 2 O 3 , or a combination thereof.

8. The method of claim 1 , wherein oxidizing the elemental aluminum comprises contacting the elemental aluminum with oxygen.

9. The method of claim 8 , wherein contacting the elemental aluminum with oxygen comprises contacting the elemental aluminum with air.

Assignees

• Hristovski Kiril D
• Markovski Jasmina
• Westerhoff Paul K
• Sinha Shahnawaz
• Univ Arizona State

Inventors

• Hristovski Kiril D
• Markovski Jasmina
• Westerhoff Paul K
• Sinha Shahnawaz

Classifications

• C02F2001/422

  using anionic exchangers · CPC title

• C02F1/285

  using synthetic organic sorbents · CPC title

• B01J20/26

  Synthetic macromolecular compounds · CPC title

• C02F2101/163

  Nitrates · CPC title

• C02F1/281

  using inorganic sorbents · CPC title