Stephen Randall Ritchie

US Patent:

6544418, Apr 8, 2003

Filed:

Aug 20, 2001

Appl. No.:

09/932908

Inventors:

Dibakar Bhattacharyya - Lexington KY
Stephen M. Ritchie - Lexington KY
Leonidas G. Bachas - Lexington KY
Jamie A. Hestekin - Lexington KY
Subhas K. Sikdar - Blue Ash OH

Assignee:

University of Kentucky Research Foundation - Lexington KY

International Classification:

B01D 6700

US Classification:

21050026, 21050037, 21050038, 210636, 210638, 210651, 264 451, 264 48, 427244

Abstract:

A method for preparing and regenerating a chemically activated or polyamino acid functionalized membrane includes the steps of permeating the silica-based membrane with a solution of silane and a solvent so as to react methoxy groups of the silane with silanol groups of the membrane to incorporate epoxide groups and attaching a polyamino acid to the membrane by reacting a terminal amine group of the polyamino acid with one of the epoxide groups on the membrane. The membrane is regenerated after metal entrapment by utilizing helix-coil properties of polyamino acids.

US Patent:

6544419, Apr 8, 2003

Filed:

Aug 20, 2001

Appl. No.:

09/933371

Inventors:

Dibakar Bhattacharyya - Lexington KY
Stephen M. Ritchie - Lexington KY
Leonidas G. Bachas - Lexington KY
Jamie A. Hestekin - Lexington KY
Subhas K. Sikdar - Blue Ash OH

Assignee:

University of Kentucky Research Foundation - Lexington KY

International Classification:

B01D 6700

US Classification:

21050026, 21050037, 21050038, 210636, 210638, 210651, 264 451, 264 48, 427244

Abstract:

A method for preparing a chemically activated or polyamino acid functionalized membrane includes the steps of permeating a silica-based membrane with a solution of silane and a solvent so as to react methoxy groups of the silane with silanol groups of the membrane to incorporate epoxide groups and attaching a polyamino acid to the membrane by reacting a terminal amine group of the polyamino acid with one of the epoxide groups on the membrane.

US Patent:

63063018, Oct 23, 2001

Filed:

Dec 3, 1999

Appl. No.:

9/454185

Inventors:

Dibakar Bhattacharyya - Lexington KY
Stephen M. Ritchie - Lexington KY
Leonidas G. Bachas - Lexington KY
Jamie A. Hestekin - Lexington KY
Subhas K. Sikdar - Blue Ash OH

Assignee:

University of Kentucky Research Foundation - Lexington KY

International Classification:

B01D 6108

US Classification:

21050026

Abstract:

An apparatus providing for metal ion/nitrate entrapment comprises a chemically activated, microfiltration, composite polymer and silica-based membrane including a polyamino acid attached thereto through reaction of a terminal amine group of the polyamino acid with the membrane. A method for preparing such a chemically activated or polyamino acid functionalized membrane includes the steps of permeating the silica-based membrane with a solution of silane and a solvent so as to react methoxy groups of the silane with silanol groups of the membrane to incorporate epoxide groups and attaching a polyamino acid to the membrane by reacting a terminal amine group of the polyamino acid with one of the epoxide groups on the membrane.