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Title: Epoxidation catalyst and process

Patent ·
OSTI ID:1015990

Disclosed herein is a catalytic method of converting alkenes to epoxides. This method generally includes reacting alkenes with oxygen in the presence of a specific silver catalyst under conditions suitable to produce a yield of the epoxides. The specific silver catalyst is a silver nanocrystal having a plurality of surface planes, a substantial portion of which is defined by Miller indices of (100). The reaction is performed by charging a suitable reactor with this silver catalyst and then feeding the reactants to the reactor under conditions to carry out the reaction. The reaction may be performed in batch, or as a continuous process that employs a recycle of any unreacted alkenes. The specific silver catalyst has unexpectedly high selectivity for epoxide products. Consequently, this general method (and its various embodiments) will result in extraordinarily high epoxide yields heretofore unattainable.

Research Organization:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FG02-05ER15686
Assignee:
The Regents of the University of Michigan (Ann Arbor, MI)
Patent Number(s):
7,820,840
Application Number:
12/498,942
OSTI ID:
1015990
Country of Publication:
United States
Language:
English

References (7)

Adsorption of ethylene on stepped Ag() surfaces journal September 2004
Mechanism, Selectivity Promotion, and New Ultraselective Pathways in Ag-Catalyzed Heterogeneous Epoxidation journal July 2004
Shape-Dependent Catalytic Activity of Silver Nanoparticles for the Oxidation of Styrene journal December 2006
Large-Scale Synthesis of Uniform Silver Nanowires Through a Soft, Self-Seeding, Polyol Process journal June 2002
The selective epoxidation of ethylene catalyzed by Ag(111): A comparison with Ag(110) journal August 1985
Shape-Controlled Synthesis of Gold and Silver Nanoparticles journal December 2002
Structure Sensitivity of the Catalytic Oxidation of Ethene by Silver journal December 1987