Increased oligomer selectivity from olefin oligomerization by incorporation of boron
AssigneePurdue Research Foundation
InventorsJeffrey T. Miller, Rajamani Gounder, Fabio H. Ribeiro, Han-Ting Tseng, Philip M. Kester, Young Gul Hur, Yoon Rae Cho
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Abstract
A novel catalyst composition and its use in the oligomerization reactions of light alkenes to higher molecular weight hydrocarbons. The catalyst comprises boron added to an Al-containing or Ga-containing or Fe-containing support. The catalyst composition is an active and selective catalyst for the catalytic oligomerization reactions of light alkenes to higher molecular weight hydrocarbons.
Claims28
An oligomerization catalyst composition comprising:
- a support matrix;
- one or more heteroatoms selected from the group consisting of aluminum, gallium, iron, and combinations thereof;
- and
- one or more trivalent boron atoms within the support matrix substituted for one or more tetravalent silicon atoms, wherein the catalyst composition comprises 0.01 wt % to 5 wt % of the boron on an elemental basis of the catalyst composition.
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A process for the oligomerization of alkenes to higher molecular weight hydrocarbons comprising:
- providing a catalyst comprising a support matrix having heteroatoms within the support matrix and trivalent boron atoms within the support matrix substituted for tetravalent silicon atoms, wherein the heteroatoms are chosen from the group consisting of aluminum, gallium, iron, and combinations thereof, wherein selectivity toward oligomers is enhanced by the presence of the boron compared to commercially available catalysts that only contain said heteroatoms with similar bulk heteroatom content and crystal size, and wherein the boron is present in an amount ranging from 0.01 wt % to 5 wt % on an elemental basis of the catalyst and the heteroatom is present in an amount from 0.01 wt % to 5 wt % on an elemental basis of the catalyst;
- contacting the catalyst with a feedstream comprising alkenes under oligomerization conditions;
- and
- converting at least a portion of the alkenes to one or more higher molecular weight hydrocarbons.
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A method of making an oligomerization catalyst comprising;
- providing a support matrix;
- combining boron and one or more heteroatoms with the support matrix, the heteroatoms chosen from the group consisting of aluminum, gallium, iron, and combinations thereof;
- recovering solids via centrifugation;
- drying the recovered solids;
- and
- calcining the dried solids to form an oligomerization catalyst, wherein the oligomerization catalyst comprises 0.01 wt % to 5 wt % of the boron on an elemental basis of the catalyst and 0.01 wt % to 5 wt % of the heteroatom on an elemental basis of the catalyst.
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Dependencies are inferred from the claim text.