| http://www.w3.org/ns/prov#value | - After calcining, the calcined catalyst compositions can be activated at elevated temperatures in a reducing atmosphere, employing reducing gases such as hydrogen, carbon monoxide, and the like, at moderate temperature suitable for activation prior to contacting the desired olefin stream, employing effective activation temperatures, such as about 300??? C. to 500??? C., for a moderate effective tim
|
