A PROCESS FOR INITIATING A HIGHLY SELECTIVE ETHYLENE OXIDE CATALYST

Title:

A PROCESS FOR INITIATING A HIGHLY SELECTIVE ETHYLENE OXIDE CATALYST

Document Type and Number:

WIPO Patent Application WO/2011/079056

Kind Code:

A3

Abstract:

A start-up process for epoxidation of ethylene is provided. The process includes initiating an epoxidation reaction by reacting a feed gas composition in the presence of an epoxidation catalyst at a first temperature of about 180 °C to about 210 °C. The first temperature is increased to a second temperature of about 230°C to about 290°C, over a time period of about 6 hours to about 50 hours, while simultaneously adding a sufficient concentration of moderator so that the amount of moderator adsorbed on the catalyst after achieving the second temperature is from about 10 to about 50 g/m3 of catalyst. The second temperature is maintained for about 50 hours to about 350 hours, while regulating the feed gas composition to contain about 0.5% to about 25% CO2. The second temperature is decreased to a third temperature, while simultaneously increasing moderator concentration to a level greater than the sufficient concentration.

Inventors:

RIZKALLA NABIL (US)
CASTAGNOLA NORMA B (US)
DESAI GIRISH (US)

Application Number:

PCT/US2010/061192

Publication Date:

November 17, 2011

Filing Date:

December 20, 2010

Export Citation:

Click for automatic bibliography generation Help

Assignee:

SCIENT DESIGN CO (US)
RIZKALLA NABIL (US)
CASTAGNOLA NORMA B (US)
DESAI GIRISH (US)

International Classes:

C07D301/10; C07C11/04

Domestic Patent References:

WO2004002971A1

2004-01-08

Foreign References:

US7553980B2	2009-06-30
US20040110971A1	2004-06-10
US20070032670A1	2007-02-08

Other References: