Catalyst for propane dehydrogenation to propylene

Patent metadata

Field	Value
Publication number	US-12102986-B2
Application number	US-202217838063-A
Country	US
Kind code	B2
Filing date	Jun 10, 2022
Priority date	Jul 15, 2021
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

A de-hydrogenation catalyst and its use in dehydrogenation of hydrocarbons. The catalyst has low cracking activity and comprises gallium or gallium and platinum on an essentially non-acidic and amorphous alumina-phosphate or silica-alumina-phosphate support with an empirical chemical composition of [Al2O3][SiO2]Y[P2O5]Z, wherein Y is between 0 and 0.2 and Z is between 0.01 and 1.1, with a BET surface area above 50 m2/g, as measured by N2 adsorption experiment.

First claim

The invention claimed is:

1. A de-hydrogenation catalyst comprising gallium on an essentially non-acidic and amorphous alumina-phosphate or silica-alumina-phosphate support with an empirical chemical composition of [Al2O3][SiO2]Y[P2O5] Z , wherein Y is between 0 and 0.2 and Z is between 0.01 and 1.1, with a BET surface area above 50 m 2 /g, as measured by N 2 adsorption experiment.

2. The catalyst of claim 1 further comprising platinum.

3. The catalyst of claim 2 comprising 1 to 500 ppm by weight platinum.

4. The catalyst of claim 2 comprising about 0.25 to 1.5 wt % gallium and about 20 ppm to 100 ppm by weight platinum.

5. The catalyst of claim 2 with an atomic ratio of Ga/Pt between 140 and 4500.

6. The catalyst of claim 2 having an atomic ratio of Ga/Pt between 200 and 500.

7. A method of preparing the catalyst of claim 2 comprising impregnating an alumina-phosphate or a silica-alumina-phosphate support with a solution containing gallium and platinum.

8. The method of claim 7 further comprising calcining the catalyst in wet or dry air at a temperature of about 600° C. to 900° C.

9. A method of preparing the catalyst of claim 2 comprising separate steps of impregnating a gallium containing solution and a platinum containing solution on the alumina-phosphate or silica-alumina-phosphate support.

10. The catalyst of claim 1 comprising 0.05-2.5 wt % gallium.

11. A process for dehydrogenating a hydrocarbon comprising:
contacting a gaseous stream consisting of at least one dehydrogenatable hydrocarbon selected from paraffinic hydrocarbons having from 2 to 20 carbons, alkylaromatic hydrocarbons having from 8 to 20 carbons, and mixtures thereof, hydrogen produced in situ by the dehydrogenation and a carrier fluid selected from the group consisting of one of the reactants in gaseous form, nitrogen, hydrocarbons, carbon dioxide, and argon; or at least one dehydrogenatable hydrocarbon selected from paraffinic hydrocarbons having from 2 to 20 carbons, alkylaromatic hydrocarbons having from 8 to 20 carbons, and mixtures thereof and hydrogen produced in situ by the dehydrogenation, in a dehydrogenation reactor with a supported dehydrogenation catalyst comprising gallium on an essentially non-acidic and amorphous alumina-phosphate or silica-alumina-phosphate support with the empirical chemical composition of [Al2O3][SiO2]Y[P2O5] Z , in which Y is between 0 and 0.2 and Z is between 0.01 and 1.1, with a BET surface area above 50 m 2 /g, as measured by N 2 adsorption experiment.

12. The process of claim 11 wherein said supported dehydrogenation catalyst further comprises platinum.

13. The process of claim 11 wherein said supported dehydrogenation catalyst comprises 0.05-2.5 wt % gallium.

14. The process of claim 11 wherein said supported dehydrogenation catalyst comprises 1 to 500 ppm by weight platinum.

15. The process of claim 11 wherein the dehydrogenation operates at a temperature of from 400° to about 900° C.

16. The process of claim 11 wherein the dehydrogenation operates at a pressure of 0.01 to 10 atmospheres.

Assignees

• Uop Llc

Inventors

• Zhao Xi
• Buchbinder Avram M
• Sachtler J W Adriaan
• Pan Wei
• Karch John A

Classifications

• B01J35/613

  10-100 m2/g · CPC title

• C10G29/04 Primary

  Metals, or metals deposited on a carrier · CPC title

• C10G2300/1096

  Aromatics or polyaromatics · CPC title

• B01J2523/828

  Platinum · CPC title

• B01J2523/32

  Gallium · CPC title