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US 9,884,314 B2Granted
Catalyst composition and reactivation process useful for alkane dehydrogenations
AssigneeDow Global Technologies LLC
InventorsLin Luo, Brien A. Stears
Life of this patent
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Abstract
A catalyst comprising a Group IIIA metal, a Group VIII noble metal, and an optional promoter metal, on a support selected from silica, alumina, silica-alumina compositions, rare earth modified alumina, and combinations thereof, doped with iron, a Group VIB metal, a Group VB metal, or a combination thereof, offers decreased reactivation time under air soak in comparison with otherwise identical catalysts. Reducing reactivation time may, in turn, reduce costs, both in inventory and capital.
Claims7
An alkane dehydrogenation catalyst composition comprising
- a Group IIIA metal selected from gallium, indium, thallium and combinations thereof, wherein the Group IIIA metal ranges from 0.25 percent by weight to 5 percent by weight;
- a Group VIII noble metal selected from platinum, palladium, rhodium, iridium, ruthenium, osmium, and combinations thereof, wherein the Group VIII noble metal ranges from 5 parts by weight to 500 parts by weight;
- at least one dopant selected from iron, chromium, vanadium, and combinations thereof, wherein:
- when iron is present, iron ranges from 100 parts by weight to 2100 parts per weight;
- when chromium is present, chromium ranges from 100 parts by weight to 800 parts by weight;
- and
- when vanadium is present, vanadium ranges from 100 parts by weight to 800 parts by weight;
- and
- an optional promoter metal selected from sodium, potassium, rubidium, cesium, magnesium, calcium, strontium, barium and combinations thereof, wherein the optional promoter metal ranges from 0 percent by weight to 2.0 percent by weight;
- wherein each percent by weight based upon weight of the total alkane dehydrogenation catalyst, and each part by weight based upon one million parts by weight of the total alkane dehydrogenation catalyst;
- on a catalyst support selected from silica, alumina, silica-alumina composites, rare earth modified alumina, and combinations thereof.
8 more elements
Dependencies are inferred from the claim text.