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Title: Chemistry and catalysis in supercritical media

Abstract

This is the final report of a three-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The aim of this research is to explore the potential of supercritical fluids as reaction media for stoichiometric and catalytic chemical transformations in an effort to develop new, environmentally-friendly methods for chemical synthesis or processing. This approach offers the possibility of opening up substantially different chemical pathways, increasing selectivity while enhancing reaction rates, facilitating downstream separations and mitigating the need for hazardous solvents. The authors describe investigations into a number of catalytic processes for which carbon dioxide represents a viable solvent replacement. In several cases they have observed significant enhancements in selectivity and/or reactivity relative to conventional organic solvents. They have investigated the following catalytic processes: (a) selective oxidation including dihydroxylation and epoxidation, (b) asymmetric hydrogenation and hydrogen transfer reduction, (c) Lewis acid catalyzed acylation and alkylation, and (c) coupling of amines with carbon dioxide to make isocyanates.

Authors:
; ;  [1]
  1. and others
Publication Date:
Research Org.:
Los Alamos National Lab., NM (United States)
Sponsoring Org.:
USDOE Assistant Secretary for Human Resources and Administration, Washington, DC (United States)
OSTI Identifier:
505272
Report Number(s):
LA-UR-97-1476
ON: DE97007835; TRN: AHC29716%%23
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: [1997]
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; SUPERCRITICAL GAS EXTRACTION; CATALYSIS; CHEMICAL INDUSTRY; CARBON DIOXIDE; OXIDATION; HYDROGENATION; HYDROGEN TRANSFER; ACYLATION; ALKYLATION; ISOCYANATES

Citation Formats

Tumas, W, Morgenstern, D, and Feng, S. Chemistry and catalysis in supercritical media. United States: N. p., 1997. Web. doi:10.2172/505272.
Tumas, W, Morgenstern, D, & Feng, S. Chemistry and catalysis in supercritical media. United States. https://doi.org/10.2172/505272
Tumas, W, Morgenstern, D, and Feng, S. Tue . "Chemistry and catalysis in supercritical media". United States. https://doi.org/10.2172/505272. https://www.osti.gov/servlets/purl/505272.
@article{osti_505272,
title = {Chemistry and catalysis in supercritical media},
author = {Tumas, W and Morgenstern, D and Feng, S},
abstractNote = {This is the final report of a three-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The aim of this research is to explore the potential of supercritical fluids as reaction media for stoichiometric and catalytic chemical transformations in an effort to develop new, environmentally-friendly methods for chemical synthesis or processing. This approach offers the possibility of opening up substantially different chemical pathways, increasing selectivity while enhancing reaction rates, facilitating downstream separations and mitigating the need for hazardous solvents. The authors describe investigations into a number of catalytic processes for which carbon dioxide represents a viable solvent replacement. In several cases they have observed significant enhancements in selectivity and/or reactivity relative to conventional organic solvents. They have investigated the following catalytic processes: (a) selective oxidation including dihydroxylation and epoxidation, (b) asymmetric hydrogenation and hydrogen transfer reduction, (c) Lewis acid catalyzed acylation and alkylation, and (c) coupling of amines with carbon dioxide to make isocyanates.},
doi = {10.2172/505272},
url = {https://www.osti.gov/biblio/505272}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {7}
}