Shell Oil Comapny

Shell Internationale Research Maatschappij, B.v.

Jeffrey Michael Kobe

Leslie Andrew Chewter

Alouisius Nicolaas Renee Bos

Wayne Errol Evans

Peter Ingraham Chipman

Leonid Isaakovich Rubinstein

Thijs Wermink

Brian Scott Vanderwilp

Arjan Jan Te Raa

Randall Clayton Yeates

Paul Michael McAllister

Marek Matusz

Martin Lysle Hess

Arend Jan Te Raa

Beamon Mcneil Johnson

Paul Michael Mcallister

David Scott Baker

John George Schuren

Processes for the epoxidation of ethylene are provided in which, following start-up, an epoxidation catalyst is contacted with a feed comprising ethylene, oxygen, carbon dioxide in an amount below 2.0 vol. %, and a chloride moderator to achieve a desired work rate at a first operating temperature T. The composition of the feed is subsequently adjusted (e.g., by decreasing the ethylene concentration, decreasing the oxygen concentration, increasing the carbon dioxide concentration and/or adjusting the concentration of the chloride moderator) so as to increase the first operating temperature Tto a second operating temperature Twhile maintaining the desired work rate. As the catalyst activity declines, the composition of the feed is further adjusted so as to maintain the desired work rate at the second operating temperature T.

Process for improving the selectivity of an EO catalyst

A process for the production of an olefin oxide, which process comprises reacting a feed comprising an olefin and oxygen in a reactor tube in the presence of a silver-containing catalyst, wherein the presence of water in the catalyst bed is controlled such that the ratio of the partial pressure of water (PPHO) divided by the vapor pressure of water (VPHO) is less than 0.006, preferably less than 0.004.

Olefin epoxidation process

A reaction system for epoxidation of olefins, with a feed control system configured to control the relative quantity of reaction modifier present in the feed, where the relative quantity of said reaction modifier is changed in response to changes in the reaction temperature.

Process and systems for the epoxidation of an olefin

A process for the epoxidation of an olefin, which process comprises reacting a feed comprising the olefin, oxygen and a reaction modifier in the presence of a highly selective silver-based catalyst at a reaction temperature T, and with the reaction modifier being present in a relative quantity Q which is the ratio of an effective molar quantity of active species of the reaction modifier present in the feed to an effective molar quantity of hydrocarbons present in the feed, and which process comprises the steps of:

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Houston, TX, United States of America

Jeffrey Michael Kobe