Invention Grant
- Patent Title: Multiple-stage catalyst system for self-metathesis with controlled isomerization and cracking
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Application No.: US16712280Application Date: 2019-12-12
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Publication No.: US11242297B2Publication Date: 2022-02-08
- Inventor: Faisal H. Alshafei , Munir D. Khokhar , Noor A. Sulais , Mohammed R. Alalouni , Sohel K. Shaikh
- Applicant: Saudi Arabian Oil Company
- Applicant Address: SA Dhahran
- Assignee: Saudi Arabian Oil Company
- Current Assignee: Saudi Arabian Oil Company
- Current Assignee Address: SA Dhahran
- Agency: Dinsmore & Shohl LLP
- Main IPC: C07C2/10
- IPC: C07C2/10 ; C07C2/12 ; C07C11/08 ; C07C11/06 ; B01J23/30 ; C07C4/06 ; B01J23/36 ; B01J35/00 ; C07C5/25 ; B01J35/10 ; B01J23/28 ; B01J29/035 ; B01J29/40 ; B01J37/08 ; C07C6/04 ; B01J37/02 ; B01J29/48

Abstract:
Embodiments of processes and multiple-stage catalyst systems for producing propylene comprising introducing a hydrocarbon stream comprising 2-butene to an isomerization catalyst zone to isomerize the 2-butene to 1-butene, passing the 2-butene and 1-butene to a metathesis catalyst zone to cross-metathesize the 2-butene and 1-butene into a metathesis product stream comprising propylene and C4-C6 olefins, and cracking the metathesis product stream in a catalyst cracking zone to produce propylene. The isomerization catalyst zone comprises a silica-alumina catalyst with a ratio by weight of alumina to silica from 1:99 to 20:80. The metathesis catalyst comprises a mesoporous silica catalyst support impregnated with metal oxide. The catalyst cracking zone comprises a mordenite framework inverted (MFI) structured silica catalyst.
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