Epoxidation process using supported silver catalysts treated with carbon dioxide

US5856534A · kind A · utility

Assignee

• Arco Chemical Technology, L.P. · US

Inventors

• Bernard Cooker · Malvern, US
• Anne Mae Gaffney · West Chester, US
• Jennifer D. Jewson · Boyertown, US
• Andrew P. Kahn · Eagleville, US

Key dates

• Filing date: Dec 18, 1997
• Grant date: Jan 5, 1999
• Expiry date: Dec 18, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/52
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The catalytic performance of a supported silver catalyst in a propylene epoxidation process is improved by first contacting the catalyst at an elevated temperature with a treatment stream comprised of carbon dioxide. The carbon dioxide-treated catalyst is thereafter contacted with a feedstream containing propylene, molecular oxygen, but essentially no carbon dioxide under conditions effective to form propylene oxide.