Shell Oil Comapny

Peter Ingraham Chipman

Leonid Isaakovich Rubinstein

Jeffrey Michael Kobe

Brian Scott Vanderwilp

Thijs Wermink

Arjan Jan Te Raa

Wayne Errol Evans

Ajay M Madgavkar

Gregg Barton Shipp

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:

Described is a method of improving the process and operation of an existing system for manufacturing ethylene oxide. The ethylene oxide manufacturing system includes an epoxidation reactor system containing a volume of high activity epoxidation catalyst. The method includes replacing a portion of the volume of high activity epoxidation catalyst with a volume of high selectivity catalyst, and modifying the operation of the process system so as to provide for a feed to the epoxidation reactor system having a reduced carbon dioxide concentration.

Method of improving the operation of an existing ethylene oxide manufacturing process and system

Process for operating the epoxidation of ethylene

There is provided a process for the vapor phase oxidation of ethylene to ethylene oxide in the presence of a supported highly selective silver-based catalyst, the process comprising operating fresh catalyst for an initial operation phase, then operating at a further operation phase when the catalyst has reached an advanced aged defined by a cumulative ethylene oxide production exceeding 1.5 kT EO per m of catalyst. In the further operation phase the composition of the reaction mixture is changed to contain from 1.1 to 4 times the concentration of ethylene used in the initial operation phase and the corresponding optimised and safe concentration of oxygen.

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Houston, TX, United States of America

Peter Ingraham Chipman