Kimberly K Powell

US Patent:

6747179, Jun 8, 2004

Filed:

Aug 18, 2000

Appl. No.:

09/641815

Inventors:

Joseph M. DeSimone - Chapel Hill NC
Eva Birnbaum - Los Alamos NM
Ruben G. Carbonell - Raleigh NC
Stephanie Crette - Chapel Hill NC
James B. McClain - Durham NC
T. Mark McCleskey - Los Alamos NM
Kimberly R. Powell - Chapel Hill NC
Timothy J. Romack - Durham NC
William Tumas - Los Alamos NM

Assignee:

North Carolina State University - Raleigh NC
The University of North Carolina at Chapel Hill - Chapel Hill NC
Regents of University of California - Oakland CA

International Classification:

C07C 502

US Classification:

585250, 585502, 585520, 568451, 568454, 549512, 549513

Abstract:

A method for carrying out a catalysis reaction in carbon dioxide comprising contacting a fluid mixture with a catalyst bound to a polymer, the fluid mixture comprising at least one reactant and carbon dioxide, wherein the reactant interacts with the catalyst to form a reaction product. A composition of matter comprises carbon dioxide and a polymer and a reactant present in the carbon dioxide. The polymer has bound thereto a catalyst at a plurality of chains along the length of the polymer, and wherein the reactant interacts with the catalyst to form a reaction product.

US Patent:

61768952, Jan 23, 2001

Filed:

Nov 4, 1998

Appl. No.:

9/185891

Inventors:

Joseph M. DeSimone - Chapel Hill NC
William Tumas - Los Alamos NM
Kimberly R. Powell - Chapel Hill NC
T. Mark McCleskey - Los Alamos NM
Timothy J. Romack - Durham NC
James B. McClain - Raleigh NC
Eva R. Birnbaum - Los Alamos NM

International Classification:

C22B 326
C01B 3120
C08K 300
C08F 1222

US Classification:

75723

Abstract:

A composition useful for the extraction of metals and metalloids comprises (a) carbon dioxide fluid (preferably liquid or supercritical carbon dioxide); and (b) a polymer in the carbon dioxide, the polymer having bound thereto a ligand that binds the metal or metalloid; with the ligand bound to the polymer at a plurality of locations along the chain length thereof (i. e. , a plurality of ligands are bound at a plurality of locations along the chain length of the polymer). The polymer is preferably a copolymer, and the polymer is preferably a fluoropolymer such as a fluoroacrylate polymer. The extraction method comprises the steps of contacting a first composition containing a metal or metalloid to be extracted with a second composition, the second composition being as described above; and then extracting the metal or metalloid from the first composition into the second composition.