Catalyst with improved activity/selectivity for light naphtha aromatization

Patent metadata

Field	Value
Publication number	US-10427141-B2
Application number	US-201816178645-A
Country	US
Kind code	B2
Filing date	Nov 2, 2018
Priority date	Nov 22, 2013
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

In an embodiment, A catalyst comprises a zeolite comprising Si, Al, and Ge in the framework with Pt deposited thereon; wherein the catalyst has an Si:Al2 mole ratio of greater than or equal to 125, an Si:Ge mole ratio of 40 to 400, and an Na:Al mole ratio of 0.9 to 2.5; wherein the catalyst has an aluminum content of less than or equal to 0.75 wt %; wherein the catalyst is non-acidic.

First claim

The invention claimed is:

1. A catalyst comprising:
a zeolite comprising Si, Al, and Ge in the framework with Pt deposited thereon; wherein the zeolite is a medium pore zeolite having an average pore size of 5 to 8 Å; wherein the zeolite further comprises Na;
wherein the catalyst has an Si:Al 2 mole ratio of 125 to 211, an Si:Ge mole ratio of 40 to 400, and an Na:Al mole ratio of 0.9 to 2.5;
wherein the catalyst has an aluminum content of less than or equal to 0.75 wt %, and a Ge content of 0.1 to 3 wt %, based on the total weight of the catalyst excluding any binder and extrusion aide;
wherein the catalyst is non-acidic.

2. The catalyst of claim 1 , wherein the Ge is present in an amount of 0.4 to 2.5 wt %, and/or the Na is present in an amount of 0.5 to 2 wt % and/or the Pt is present in an amount of 0.05 to 3 wt %, wherein the wt % values are based on the total weight of the catalyst excluding any binder and extrusion aide.

3. The catalyst of claim 2 , wherein the Ge content of 0.4 to 2.5 wt %, the Na content of 0.5 to 2 wt %, and the Pt content of 0.05 to 3 wt %, wherein the wt % values are based on the total weight of the catalyst excluding any binder and extrusion aide.

4. The catalyst of claim 1 , wherein the catalyst has a Ge content of 0.4 to 1.5 wt % based on the total weight of the catalyst excluding any binder and extrusion aide.

5. The catalyst of claim 1 , wherein the catalyst comprises Al in an amount of 0.45 to 0.7 wt % based on the total weight of the catalyst excluding any binder and extrusion aide.

6. The catalyst of claim 1 , wherein the zeolite is a ZSM-5 zeolite.

7. The catalyst of claim 1 , wherein the Si:Ge mole ratio of 50 to 300.

8. The catalyst of claim 1 , wherein the Na:Al mole ratio of 1.2 to 2.2.

9. The catalyst of claim 1 , wherein the Si:Al 2 mole ratio is 125 to 200.

10. A method for the aromatization of hydrocarbons comprising contacting an alkane containing 6 to 12 carbon atoms per molecule with the catalyst of claim 1 .

11. A catalyst comprising:
a zeolite comprising Si, Al, and Ge in the framework with Pt deposited thereon; wherein the zeolite further comprises Na;
wherein the catalyst has an Si:Al 2 mole ratio of greater than or equal to 125, an Si:Ge mole ratio of 40 to 400, and an Na:Al mole ratio of 0.9 to 2.5;
wherein the catalyst has an aluminum content of less than or equal to 0.75 wt %;
wherein the catalyst is non-acidic.

12. The catalyst of claim 11 , wherein the zeolite is a medium pore zeolite having an average pore size of 5 to 8 Å.

13. The catalyst of claim 11 , wherein the Si:Al 2 mole ratio of 125 to 211.

14. The catalyst of claim 11 , wherein the catalyst has a Ge content of 0.1 to 3 wt % based on the total weight of the catalyst excluding any binder and extrusion aide.

15. A method for the aromatization of hydrocarbons comprising contacting an olefin with the catalyst of claim 1 .

16. The method of claim 15 , wherein the Ge is present in an amount of 0.3 to 3 wt %, and/or the Na is present in an amount of 0.5 to 2 wt % and/or the Pt is present in an amount of 0.05 to 3 wt %, wherein the wt % values are based on the total weight of the final catalyst excluding any binder and extrusion aide.

Assignees

• Saudi Basic Ind Corp

Inventors

• Khanmamedova Alla
• Stevenson Scott

Classifications

• B01J29/047 Primary

  Germanosilicates; Aluminogermanosilicates (B01J29/005 takes precedence) · CPC title

• B01J23/42

  Platinum · CPC title

• C10G45/12

  containing crystalline alumino-silicates, e.g. molecular sieves · CPC title

• C07C5/325

  of the platinum group · CPC title

• C07C2529/62

  Noble metals · CPC title