Hydroisomerization catalyst manufactured using a high nanopore volume alumina supports

Patent metadata

Field	Value
Publication number	US-9616419-B2
Application number	US-201514862358-A
Country	US
Kind code	B2
Filing date	Sep 23, 2015
Priority date	Sep 30, 2014
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

The present invention is directed to an improved finished hydroisomerization catalyst manufactured from a first high nanopore volume (HNPV) alumina and a pore size distribution characterized by a full width at half-maximum, normalized to pore volume, of 15 to 25 nm·g/cc, and a second HNPV alumina having a pore size distribution characterized by a full width at half-maximum, normalized to pore volume, of 5 to 15 nm·g/cc. Their combination yields a HNPV base extrudate having a low particle density as compared to a conventional base extrudates.

First claim

What is claimed is:

1. A hydroisomerization catalyst, comprising:
a base extrudate comprising
at least one molecular sieve selective towards isomerization of n-paraffins,
a first alumina having a pore size distribution characterized by a full width at half-maximum, normalized to pore volume, of 15 to 25 nm·g/cc, and
a second alumina having a pore size distribution characterized by a full width at half-maximum, normalized to pore volume, of 5 to 15 nm·g/cc;

the catalyst further comprising at least one metal selected from the group consisting of elements from Group 6 and Groups 8 through 10 of the Periodic Table.

2. The hydroisomerization catalyst of claim 1 , wherein the first alumina has a nanopore volume in the 2 nm to 50 nm range of 0.7 to 2 cc/g.

3. The hydroisomerization catalyst of claim 2 , wherein the second alumina has a nanopore volume in the 2 nm to 50 nm range of 0.7 to 2 cc/g.

4. The hydroisomerization catalyst of claim 1 , wherein the second alumina has a nanopore volume in the 2 nm to 50 nm range of 0.7 to 2 cc/g.

5. The hydroisomerization catalyst of claim 1 , wherein a pore size distribution plot for the base extrudate will indicate a maximum peak with a shoulder located at a pore size between 7 and 14 nm.

6. The hydroisomerization catalyst of claim 1 , wherein the base extrudate has a nanopore volume in the 6 nm to 11 nm range of 0.25 to 0.4 cc/g, a nanopore volume in the 11 nm to 20 nm range of 0.1 to 0.3 cc/g, and a nanopore volume in the 20 nm to 50 nm range of 0.04 to 0.1 cc/g.

7. The hydroisomerization catalyst of claim 1 , wherein the base extrudate has a total nanopore volume in the 2 nm to 50 nm range of 0.7 to 1.2 cc/g.

8. The hydroisomerization catalyst of claim 1 , wherein the base extrudate has a nanopore volume in the 6 nm to 11 nm range of 0.25 to 0.4 cc/g.

9. The hydroisomerization catalyst of claim 1 , wherein the base extrudate has a particle density of 0.75 to 0.95 g/cc.

10. A process for hydroisomerization a hydrocarbonaceous feedstock, comprising contacting the feedstock with a hydroisomerization catalyst under hydroisomerization conditions to produce a hydroisomerized effluent;
the hydroisomerization catalyst comprising
a base extrudate comprising
at least one molecular sieve selective towards isomerization of n-paraffins,
a first alumina having a pore size distribution characterized by a full width at half-maximum, normalized to pore volume, of 15 to 25 nm·g/cc, and
a second alumina having a pore size distribution characterized by a full width at half-maximum, normalized to pore volume, of 5 to 15 nm·g/cc;

the catalyst further comprising at least one metal selected from the group consisting of elements from Group 6 and Groups 8 through 10 of the Periodic Table.

11. The process of claim 10 , wherein the first alumina has a nanopore volume in the 2 nm to 50 nm range of 0.7 to 2 cc/g.

12. The process of claim 11 , wherein the second alumina has a nanopore volume in the 2 nm to 50 nm range of 0.7 to 2 cc/g.

13. The process of claim 10 , wherein the second alumina has a nanopore volume in the 2 nm to 50 nm range of 0.7 to 2 cc/g.

14. The process of claim 10 , wherein a pore size distribution plot for the base extrudate will indicate a maximum peak with a shoulder located at a pore size between 7 and 14 nm.

15. The process of claim 10 , wherein the base extrudate has a nanopore volume in the 6 nm to 11 nm range of 0.25 to 0.4 cc/g, a nanopore volume in the 11 nm to 20 nm range of 0.1 to 0.3 cc/g, and a nanopore volume in the 20 nm to 50 nm range of 0.04 to 0.1 cc/g.

16. The process of claim 10 , wherein the base extrudate has a total nanopore volume in the 2 nm to 50 nm range of 0.7 to 1.2 cc/g.

17. The process of claim 10 , wherein the base extrudate has a nanopore volume in the 6 nm to 11 nm range of 0.25 to 0.4 cc/g.

18. The process of claim 10 , wherein the base extrudate has a particle density of 0.75 to 0.95 g/cc.

19. The hydroisomerization catalyst of claim 1 , wherein the base extrudate has a bimodal pore size distribution.

20. The process of claim 10 , wherein the base extrudate has a bimodal pore size distribution.

Assignees

• Chevron Usa Inc

Inventors

• Zhang Yihua
• Krishna Kamala Raghunathan
• Lei Guan-Dao
• Maesen Theodorus Ludovicus Michael

Classifications

• C10M101/02

  Petroleum fractions · CPC title

• C10G45/64

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

• B01J35/00

  Catalysts, in general, characterised by their form or physical properties · CPC title

• B01J29/7492

  MTT-type, e.g. ZSM-23, KZ-1, ISI-4 or EU-13 · CPC title

• B01J29/7461

  MRE-type, e.g. ZSM-48 · CPC title