Office of Technology Transfer – University of Michigan

Highly Selective Catalysts for Epoxidation of Ethylene to Form Ethylene Oxide

Technology #4082

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Researchers
Suljo Linic
Managed By
Mutsumi Yoshida
Licensing and Market Specialist 734.763.0441
Patent Protection
US Patent 7,820,840

Background

Ethylene epoxidation is a process where oxygen and ethylene are reacted over supported Ag catalysts to produce ethylene oxide and combustion products.

Technology

This invention relates to a new preparation method for Ag catalysts used in gas phase ethylene epoxidation. The critical metrics for the quality of a catalyst is the selectivity to ethylene oxide. This technology achieves inherently more selective monometallic Ag catalysts compared with Ag catalysts used currently, synthesized through standard incipient wetness or impregnation techniques.

Applications and Advantages

Applications

  • Production of ethylene glycol (antifreeze), as well as detergents, ethanolamines, lubricants and many other commodity products.

Advantages

  • This work focuses on a different method, where the face structure of Ag nano-structures can be controlled in the synthesis for more selective epoxidation.