Systems and processes for producing olefins
AssigneeSaudi Arabian Oil Company
InventorsMohammed Abdulmajeed Al-Daous, Hussam A. Bahlouli
Life of this patent
Estimating the term…
Abstract
Olefins may be produced from C4-C6 saturated hydrocarbons by systems and methods comprising passing a feed comprising C4-C6 saturated hydrocarbons and hydrogen into a dehydrogenation unit to produce a dehydrogenation effluent, passing at least a portion of the dehydrogenation effluent into a hydrogenation unit to produce a hydrogenation effluent, and passing at least a portion of the hydrogenation effluent into a cracking unit to produce a cracking effluent comprising olefins. The dehydrogenation unit includes a dehydrogenation catalyst, the hydrogenation unit includes a hydrogenation catalyst, and the cracking unit includes a cracking catalyst.
Claims13
A process for producing olefins from C4-C6 saturated hydrocarbons, the process comprising:
- passing a feed comprising C4-C6 saturated hydrocarbons and hydrogen into a dehydrogenation unit to produce a dehydrogenation effluent comprising corresponding olefins and dienes of the C4-C6 saturated hydrocarbons, the dehydrogenation unit comprising a dehydrogenation catalyst that inhibits isomerization and cracking during the dehydrogenation, the dehydrogenation catalyst comprising platinum and tin on potassium-treated L zeolite;
- passing at least a portion of the dehydrogenation effluent into a hydrogenation unit to produce a hydrogenation effluent, the hydrogenation unit comprising a hydrogenation catalyst that selectively converts the dienes of the C4-C6 saturated hydrocarbons into olefins, the hydrogenation catalyst comprising from 0.25% to 7% by weight cobalt on a support comprising silica or alumina;
- and
- passing at least a portion of the hydrogenation effluent into a cracking unit to produce a cracking effluent comprising olefins, the cracking unit comprising a cracking catalyst, the cracking catalyst comprising a ZSM-5 catalyst.
6-10. (canceled)
A system for producing olefins from C4-C6 saturated hydrocarbons, the system comprising:
- a dehydrogenation unit in communication with a feed comprising C4-C6 saturated hydrocarbons and hydrogen, the dehydrogenation unit comprising a dehydrogenation catalyst, the dehydrogenation catalyst comprising K-L zeolite treated with platinum and tin;
- a hydrogenation unit in communication with a dehydrogenation effluent from the dehydrogenation unit, the hydrogenation unit comprising a hydrogenation catalyst, the hydrogenation catalyst comprising from 0.25% to 7% by weight of a transition metal supported on a support comprising one or more of silica and alumina;
- and
- a cracking unit in communication with a hydrogenation effluent from the hydrogenation unit, the cracking unit comprising a cracking catalyst, the cracking catalyst comprising a ZSM-5 catalyst.
Dependencies are inferred from the claim text.