Process of preparing catalyst; platinum-tin on zinc aluminate-calcium aluminate-zeolite catalyst for selective light alkane dehydrogenation
AssigneeSabic Global Technologies B.V.
InventorZeeshan Nawaz
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Abstract
Disclosed are supported platinum-tin (Pt—Sn) based catalysts and methods of their use in selective light alkane dehydrogenation to corresponding alkenes and preparation. The supported catalysts contain a support of blended zeolite, in particular SAPO-34, zinc aluminate compound, and calcium aluminate, impregnated with Pt and Sn metal and a promoter that includes an alkali metal or compound thereof, an alkaline earth metal or compound thereof, or any combination thereof.
Claims11
A supported platinum-tin (Pt—Sn) based catalyst comprising:
- a support comprising:
- a zeolite;
- a zinc aluminate compound;
- and
- a calcium aluminate compound;
- catalytically active metals comprising:
- Pt metal or a compound thereof;
- and
- Sn metal or a compound thereof;
- and
- a promoter comprising an alkali metal selected from the group consisting of sodium and lithium or compound thereof, an alkaline earth metal or compound thereof, or any combination thereof;
- wherein the alkaline earth metal is not calcium;
- wherein the promoter further comprises a member selected from the group consisting of scandium, hafnium, mercury and lead;
- wherein if the promoter comprises hafnium, the promoter also comprises from 0.01 to 10 wt. % of the Pt metal or a compound thereof, based on the total weight of the catalyst.
A supported platinum-tin (Pt—Sn) based catalyst comprising:
- a support comprising:
- a zeolite;
- a zinc aluminate compound;
- and
- a calcium aluminate compound;
- catalytically active metals comprising:
- Pt metal or a compound thereof;
- and
- Sn metal or a compound thereof;
- and
- a promoter consisting of lithium (Li), rubidium (Rb), cesium (Cs) and beryllium (Be).
A supported platinum-tin (Pt—Sn) based catalyst comprising:
- a support comprising a blend of:
- a zeolite;
- a zinc aluminate compound;
- and
- a calcium aluminate compound;
- catalytically active metals comprising:
- Pt metal or a compound thereof;
- and
- Sn metal or a compound thereof;
- and
- a promoter comprising an alkali metal or compound thereof, an alkaline earth metal or compound thereof, or any combination thereof;
- wherein the alkaline earth metal is not calcium;
- wherein the support comprises from 5 to 75 wt. % of the zeolite, based on the total weight of the support;
- and
- wherein the zeolite comprises a member selected from the group consisting of one or more of SAPO-34, SAPO-11, SAPO-35, ZSM-5, MCM-41 and SBA-15;
- and
- wherein the promoter further comprises at least one member selected from the group consisting of vanadium, rhenium, silver and gold.
Dependencies are inferred from the claim text.