Shell Oil Comapny

Shell Internationale Research Maatschappij, B.v.

Paul Michael McAllister

Wayne Errol Evans

Marek Matusz

Randall Clayton Yeates

Michael Alan Richard

Dominicus Maria Rekers

Jeffrey Michael Kobe

John Robert Lockemeyer

Alouisius Nicolaas Renée Bos

Donald Reinalda

Anne Taylor Coleman

Johannes Leopold Marie Syrier

A process is provided for the start-up of an ethylene epoxidation process comprising: (a) contacting a catalyst bed comprising a high selectivity epoxidation catalyst with a feed comprising ethylene, oxygen and an organic chloride for a period of time until an increase of at least 1&#xd7;10mole-% of vinyl chloride (calculated as the moles of vinyl chloride relative to the total gas mixture), preferably 2&#xd7;10mole-% of vinyl chloride is detected in a reactor outlet gas or a recycle gas loop; and (b) subsequently adjusting the quantity of organic chloride in the feed to a value sufficient to produce ethylene oxide at a substantially optimum selectivity.

Process for the start-up of an epoxidation process, a process for the production of ethylene oxide, a 1,2-diol, a 1,2-diol ether, a 1,2-carbonate, or an alkanolamine

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

The present invention relates to a process for improving the overall selectivity of an EO process for converting ethylene to ethylene oxide utilizing a highly selective EO silver catalyst containing a rhenium promoter wherein following normal operation a chloride strip of the chloride on the surface of the catalyst is conducted in order to remove a portion of the chlorides on the surface of the catalyst. The chloride strip involves the addition of certain saturated hydrocarbons to the feed. Following the chloride strip, the catalyst is optionally re-optimized.

Process for improving the selectivity of an EO catalyst

A reactor system for the oxidation of ethylene to ethylene oxide. The reactor system includes a reactor tube that contains a packed bed of shaped support material that can include a catalytic component. The shaped support material has a hollow cylinder geometric configuration. The reactor system has specific combinations of reactor tube and catalyst system geometries.

Reactor system and process for the manufacture of ethylene oxide

A process for selecting shaped particles for use in a tube which is capable of being packed with shaped particles to form a packed bed in the tube. A desired value of one or more properties of the packed bed is defined. The dimensions of the shaped particles are calculated such that a packed bed in the tube of the shaped particles having the calculated dimensions meets or substantially meets the desired value(s), and shaped particles are selected in accordance with the calculated dimensions. The properties of the packed bed may be the volume fraction which is occupied by shaped particles, the packing density, and the resistivity for a gas flowing through the packed bed.

Process for selecting shaped particles for use in a packed bed

A high activity and high selectivity silver catalyst comprising silver and, optionally, one or more promoters supported on a suitable support material having the form of a shaped agglomerate. The structure of the shaped agglomerate is that of a hollow cylinder having a relatively small inside (bore) diameter. The catalyst is made by providing the shaped material of a particular geometry and incorporating the catalytic components therein. The catalyst is useful in the epoxidation of ethylene.

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Houston, TX, United States of America

Paul Michael McAllister