Catalysts for light olefin oligomerization
AssigneeExxonMobil Technology and Engineering Company
InventorsEmiel DE SMIT, Michael P. LANCI, Trong D. PHAM
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Abstract
Methods are provided for low temperature conversion of olefinic feeds that contain C3-C8 olefins, and further optionally contain C2 olefins. It has been discovered that conversion of C2 olefins and/or C3-C8 olefins can be performed by using catalysts containing zeolitic framework structures that have one or more beneficial features. This conversion can be achieved at relatively low reaction temperatures. In some aspects, the conversion can be achieved without the presence of a substantial amount of catalytic metal supported on the catalyst.
Claims24
A method of converting a feed containing C2-C8 olefins, comprising:
- exposing a feed comprising 50 wt % or more of C2-C8 olefins to a catalyst comprising a zeolitic framework structure having a 1-dimensional or 3-dimensional largest pore channel under conversion conditions to form a conversion product comprising 70 wt % or more of 121° C.+ components and 2.0 wt % or less of C3-C6 alkanes, relative to a weight of olefins in the feed, the conversion conditions comprising single pass conversion of 30 wt % or more of C2 olefins and 80 wt % or more of C4 olefins,
- wherein a maximum diameter of a sphere that can be included in the largest pore channel is 5.0 Angstroms to 6.5 Angstroms.
A method of converting a feed containing C2-C8 olefins, comprising:
- exposing a feed comprising 5.0 wt % or more of C2 olefins and 25 wt % or more of C2-C8 olefins to a catalyst comprising a zeolitic framework structure under conversion conditions to form a conversion product comprising 70 wt % or more of 121° C.+ components, relative to a weight of olefins in the feed, the conversion conditions comprising single pass conversion of 50 wt % or more of C2 olefins and 80 wt % or more of C4 olefins,
- wherein the catalyst comprises
- i) a zeolitic framework structure comprising an elliptical 8-membered ring pore channel having a pore channel size of 2.2 Angstroms to 3.5 Angstroms for a minor elliptical axis and 4.0 Angstroms to 6.0 Angstroms for a major elliptical axis, the zeolitic framework structure being a 2-dimensional or 3-dimensional zeolitic framework structure;
- ii) a zeolitic framework structure where a maximum diameter of a sphere that can be included in a largest pore channel is 4.0 Angstroms to 6.0 Angstroms;
- or
- iii) a combination of i) and ii).
Dependencies are inferred from the claim text.