Highly CO{sub 2}-soluble chelating agents for supercritical extraction and recovery of heavy metals
- Univ. of Pittsburgh, PA (United States). Chemical Engineering Dept.
Carbon dioxide is an attractive organic solvent in today`s chemical process environment in that it is non-flammable, inexpensive, and exhibits low toxicity. Further, materials solubilized in carbon dioxide are easily and completely recovered/concentrated from solution via a simple pressure quench. Despite these favorable properties, CO{sub 2} is non-polar, and as such is a very poor solvent for materials such as conventional metal chelating agents, thus blocking application of carbon dioxide in metal extraction/recovery. Consequently, the authors are exploring the molecular design of materials which are highly CO{sub 2}-philic, that is, they exhibit solubilities in carbon dioxide which are significantly greater than alkanes with the same number of main-chain atoms. By functionalizing chelating moieties with CO{sub 2}-philic oligomers, the authors have generated materials which both effectively extract metals from solid matrices and which dissolve in carbon dioxide in significant quantities.
- OSTI ID:
- 106188
- Report Number(s):
- CONF-940411-; ISBN 1-55899-239-1; TRN: IM9542%%276
- Resource Relation:
- Conference: Spring meeting of the Materials Research Society (MRS), San Francisco, CA (United States), 4-8 Apr 1994; Other Information: PBD: 1994; Related Information: Is Part Of Materials and processes for environmental protection; Voss, K.E.; Quick, L.M. [eds.] [Englehard Corp., Iselin, NJ (United States)]; Gadgil, P.N. [ed.] [Queens Univ., Kingston, Ontario (Canada)]; Adkins, C.L.J. [ed.] [Sandia National Labs., Albuquerque, NM (United States)]; PB: 356 p.; Materials Research Society symposium proceedings, Volume 344
- Country of Publication:
- United States
- Language:
- English
Similar Records
Inexpensive CO2 Thickening Agents for Improved Mobility Control of CO2 Floods
Design, synthesis, and evaluation of novel, highly CO{sub 2}-soluble chelating agents for removal of metals