Phillips Petroleum Company

Chevron Phillips Chemical Company LP

Glyndal D Cowan

Bruce E Kreischer

Ronald D Knudsen

Warren M Ewert

Jeffrey W Freeman

Lyle R Kallenbach

Richard L Anderson

Mark E Lashier

Harvey D Hensley

William M Woodard

Ralph V Franklin

Charles A Drake

A process is provided to stabilize and/or reactivate an olefin production catalyst system which comprises contacting an olefin production catalyst system, either before or after use, with an aromatic compound.

Olefin production process

A process is provided which comprises preparing an olefin oligomerization or trimerization catalyst system and producing olefins in the presence of the olefin oligomerization or trimerization catalyst system and a solvent, wherein said catalyst system preparation comprises the steps of first contacting a chromium source and a pyrrole-containing compound to form a chromium/pyrrole mixture; second, contacting said chromium/pyrrole mixture with a metal alkyl to form a catalyst system; and then contacting said catalyst system with an alpha-olefin, preferably ethylene.

Olefin production

In a batch process in which fluid is contacted with solid particles in a vessel and withdrawn therefrom through a passageway, the passageway is provided with filtering means to prevent solid particles from escaping. The next batch of feed is introduced into the vessel through the same passageway causing displacement of the particles retained by the filtering means and carrying them back into the contacting zone of the vessel.

Solid-fluid contacting apparatus

Growing community of inventors

Bartlesville, OK, United States of America

Glyndal D Cowan