Aminoclay for harvesting algae

Patent metadata

Field	Value
Publication number	US-9267105-B2
Application number	US-201214371718-A
Country	US
Kind code	B2
Filing date	Mar 13, 2012
Priority date	Jan 11, 2012
Publication date	Feb 23, 2016
Grant date	Feb 23, 2016

Abstract

The present invention relates to aminoclay, for harvesting algae, which is prepared by fixing aminosilane around cationic metal ions through a sol-gel reaction. Also, the present invention relates to a method for harvesting algae using the aminoclay according to any one selected from the above methods.

First claim

The invention claimed is:

1. Aminoclay for harvesting microalgae, which is prepared by fixing aminosilane centering around cationic metal ions through a sol-gel reaction.

2. The aminoclay according to claim 1 , wherein the metal ions are selected from the group consisting of Mg 2+ , Ca 2+ , Zn 2+ , Mn 2+ , Cu 2+ , Co 2+ , Ni 2− , Al 3+ , and Fe 3+ .

3. The aminoclay according to claim 1 , wherein the aminosilane is selected from the group consisting of (3-aminopropyl)triethoxysilane, [3-(2-aminoethylamino)propyl]trimethoxysilane and 3-[2-(2-aminoethylamino)ethylamino]propyltrimethoxysilane.

4. The aminoclay according to claim 1 , wherein the aminosilane is a hybrid formed by mixing at least one selected from the group consisting of TTMS (3-mercaptopropyl)trimethoxysilane), MTES (methyltriethoxysilane), PTES (phenyltriethoxysilane) and TEOS (tetraethoxysilane).

5. The aminoclay according to claim 1 , wherein a mixing ratio of metal ions to aminosilane is higher than one.

6. The aminoclay according to claim 5 , wherein the mixing ratio of metal ions to aminosilane is 1:0.75.

7. The aminoclay according to claim 1 , wherein the fixing is executed in an organic solvent or distilled water.

8. The aminoclay according to claim 7 , wherein the organic solvent is a solvent for dissolving at least one selected from the group consisting of cationic metal ions, organosilane, and combinations thereof.

9. The aminoclay according to claim 8 , wherein the organic solvent is selected from the group consisting of ethanol, methanol, dimethylformamide (DMF), dimethyl sulfoxide (DMSO) and combinations thereof.

10. The aminoclay according to claim 1 , wherein the fixing is executed at 5 to 30° C. and 1 atm.

11. The aminoclay according to claim 1 , wherein the microalgae is green algae or blue-green algae.

12. The aminoclay according to claim 1 , wherein the aminoclay has cationic properties at pH 4 to 10 to increase flocculation to the surface of the microalgae exhibiting anionic properties.

Assignees

• Farooq Wasif
• Lee Young-Chul
• Yang Ji-Won
• Korea Advanced Inst Sci & Tech

Inventors

• Farooq Wasif
• Lee Young-Chul
• Yang Ji-Won

Classifications

• C07F7/10

  containing nitrogen {having a Si-N linkage} · CPC title

• C12N1/02

  Separating microorganisms from their culture media · CPC title

• C12Q1/24 Primary

  Methods of sampling, or inoculating or spreading a sample; Methods of physically isolating an intact microorganisms · CPC title

• C12N1/12 Primary

  Unicellular algae; Culture media therefor (as new plants A01H13/00) · CPC title

• G01N33/553

  Metal or metal coated · CPC title