Tpc Group LLC

Robert P Adams

John Joseph Senetar

Joseph G Duff

Jillian M Horn

Clifford Alan Maat

A method of oxidatively dehydrogenating a n-butenes to butadiene includes oxidatively dehydrogenating dehydrogenation reactant in a first adiabatic, catalytic reaction zone to provide a first-stage effluent stream enriched in butadiene at a first-stage effluent temperature above the first-stage inlet temperature, cooling the first-stage effluent stream in a first heat transfer zone to a second-stage inlet temperature lower than said first-stage effluent temperature to provide a second gaseous feed stream comprising superheated steam, n-butene and butadiene, wherein the second stage inlet temperature is lower than said first stage effluent temperature and oxidatively dehydrogenating n-butene in the second stream to provide a product stream further enriched in butadiene at a second stage effluent temperature above said second-stage inlet temperature. The first reaction zone temperature rise and the second reaction zone temperature rise are at least 200&#xb0; F. (111&#xb0; C.) and the first heat transfer zone temperature reduction is at least 50% of the value of the first reaction zone temperature rise.

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Missouri City, TX, United States of America

Robert P Adams