Heterogeneous alkane dehydrogenation catalyst

Patent metadata

Field	Value
Publication number	US-9776170-B2
Application number	US-201415035315-A
Country	US
Kind code	B2
Filing date	Dec 2, 2014
Priority date	Dec 16, 2013
Publication date	Oct 3, 2017
Grant date	Oct 3, 2017

Abstract

A heterogeneous catalyst suitable for use in alkane dehydrogenation has an active layer that includes alumina and gallia. The active layer is dispersed on a support such as alumina or silica-modified alumina.

First claim

What is claimed is:

1. A heterogeneous alkane dehydrogenation catalyst consisting of a combination of aluminum oxide and gallium oxide dispersed as an active layer on a silica-modified alumina support.

2. The catalyst of claim 1 , wherein the aluminum and the gallium in the active layer are present in a molar ratio of gallium to aluminum that is within a range of from greater than 0.5:1 to less than 15:1.

3. The catalyst of claim 2 , wherein the molar ratio is within a range of from 1:1 to 10:1.

4. The catalyst of claim 1 , wherein the aluminum oxide in the active layer is present in an amount within a range of from 0.05 percent by weight to 14 percent by weight and the gallium oxide in the active layer is present in an amount within a range of from greater than 0 percent by weight to less than fourteen by weight, each weight percent being based upon total catalyst weight.

5. The catalyst of claim 4 , wherein the amount of aluminum oxide is within a range of from 0.05 percent by weight to 5 percent by weight and the gallium oxide is present in an amount within a range of from greater than 0 percent by weight to less than seven percent by weight, each weight percent being based upon total catalyst weight.

6. The catalyst of claim 1 , comprising the silica-modified alumina support comprising from 0.1 wt. % to 10 wt. % silica based on the total weight of the support.

7. A heterogeneous alkane dehydrogenation catalyst consisting of a combination of aluminum oxide and gallium oxide dispersed as an active layer on an alumina support or a silica-modified alumina support, wherein the aluminum and the gallium in the active layer are present in a molar ratio of gallium to aluminum that is within a range of from greater than 0.5:1 to less than 15:1.

8. The catalyst of claim 7 , wherein the molar ratio is within a range of from 1:1 to 10:1.

9. The catalyst of claim 7 , wherein the aluminum oxide in the active layer is present in an amount within a range of from 0.05 percent by weight to 14 percent by weight and the gallium oxide in the active layer is present in an amount within a range of from greater than 0 percent by weight to less than fourteen by weight, each weight percent being based upon total catalyst weight.

10. The catalyst of claim 9 , wherein the amount of aluminum oxide is within a range of from 0.05 percent by weight to 5 percent by weight and the gallium oxide is present in an amount within a range of from greater than 0 percent by weight to less than seven percent by weight, each weight percent being based upon total catalyst weight.

11. A catalyst comprising a support and an active layer dispersed on the support, the active layer comprising aluminum oxide and gallium oxide, wherein a molar ratio of gallium to aluminum in the active layer is from 0.5:1 to 15:1.

12. The catalyst of claim 11 , wherein the support is an inactive support.

13. The catalyst of claim 11 , wherein the support is an alumina support or a silica-modified alumina support.

14. The catalyst of claim 13 , wherein the support is a silica-modified alumina support comprising from 0.1 wt. % to 10 wt. % silica based on the total weight of the support.

Assignees

• Dow Global Technologies Llc

Inventors

• Kaminsky Mark P
• Malek Andrzej
• Luo Lin
• Stears Brien A
• Mbaraka Isa K
• Rosenfeld Devon C

Classifications

• C07C2521/12

  Silica and alumina · CPC title

• B01J37/0242

  Coating followed by impregnation · CPC title

• B01J37/0201

  Impregnation · CPC title

• Y02P20/52

  using catalysts, e.g. selective catalysts · CPC title

• B01J23/08 Primary

  of gallium, indium or thallium · CPC title