Isomerization catalyst

Patent metadata

Field	Value
Publication number	US-10675613-B2
Application number	US-201515324016-A
Country	US
Kind code	B2
Filing date	Jul 6, 2015
Priority date	Jul 7, 2014
Publication date	Jun 9, 2020
Grant date	Jun 9, 2020

Abstract

Paraffin isomerization catalyst comprising of from 0.01 to 5 wt. % of a Group VIII noble metal on a carrier containing alumina and zeolite beta having a silica to alumina molar ratio (SAR) of from 5 to 15 and process employing such catalyst for isomerization of a hydrocarbon feed containing paraffins having of from 4 to 8 carbon atoms.

First claim

That which is claimed is:

1. A paraffin isomerization catalyst comprising: from 0.01 to 5 wt. % of a Group VIII noble metal on a carrier containing alumina and zeolite beta that does not contain an organic structure directing agent and having a silica to alumina molar ratio (SAR) of from 5 to 15.

2. The paraffin isomerization catalyst according to claim 1 , wherein the Group VIII noble metal is platinum which is present in an amount of from 0.1 to 3 wt. %.

3. The paraffin isomerization catalyst according to claim 1 , wherein the carrier comprises of from 60 to 95 wt. % of the zeolite beta.

4. The paraffin isomerization catalyst according to claim 1 , wherein the average crystal size of the zeolite beta as determined by scanning electron microscopy is of from 50 to 500 nanometers.

5. A paraffin isomerization catalyst, comprising a Group VIII noble metal impregnated onto a carrier comprising alumina and zeolite beta, wherein the zeolite beta is prepared by a process which comprises
(a) mixing and stirring an alkali oxide source, an aluminum oxide source, a silicon dioxide source and water without addition of an organic structure directing agent (SDA) to provide an aluminosilicate synthesis gel having the following mole ratio of raw materials: SiO 2 /Al 2 O 3 =15-45, Na 2 O/SiO 2 =0.20-0.50, H 2 O/SiO 2 =4-50; and
(b) adding zeolite crystal seed and allowing the aluminosilicate synthesis gel to crystallize at elevated temperature to obtain the zeolite beta crystals having a silica to alumina molar ratio (SAR) of from 5 to 15.

6. The paraffin isomerization catalyst according to claim 5 wherein the process comprises allowing the aluminosilicate synthesis gel to crystallize in step (b) at a temperature of from 100 to 180° C. during from 12 to 24 hours.

7. The paraffin isomerization catalyst according to claim 1 , wherein the zeolite beta has a SAR of from 5 to 12.

8. A process for preparing an isomerization catalyst according to claim 1 , which process comprises (a) mixing alumina and zeolite beta, having a SAR of from 5 to 15 and made without the direct use of an organic structure directing agent (SDA) during its synthesis, to yield a mixture; (b) extruding the mixture obtained in step (a) to yield extrudates; (c) optionally drying and calcining the extrudates obtained in step (b); and (d) impregnating the extrudates obtained in step (b) or in step (c) with a platinum containing solution to provide impregnated extrudates followed by drying and optionally calcining the impregnated extrudates.

9. The process according to claim 8 , in which the platinum containing solution is an aqueous solution comprising hexachloroplatinic acid.

10. The process for isomerizing a hydrocarbon feed containing paraffins having of from 4 to 8 carbon atoms by contacting the feed with a catalyst according to claim 1 at a temperature of from 150 to 300° C. and a pressure of from 0.1 to 30 bara.

11. A paraffin isomerization catalyst, comprising: a formed and calcined carrier comprising from 2 to 50 wt. % alumina and from 50 to 98 wt. % zeolite beta that does not contain an organic structure directing agent and having a silica-to-alumina molar ratio (SAR) in the range of from 5 to 12, wherein said formed and calcined carrier is impregnated with an amount of Group VIII noble metal to provide from 0.01 to 5 wt. % said Group VIII noble metal on said formed and calcined carrier.

12. The paraffin isomerization catalyst according to claim 11 , wherein the Group VIII noble metal is platinum which is present in an amount of from 0.1 to 3 wt. %.

13. The paraffin isomerization catalyst according to claim 11 , wherein the carrier comprises of from 60 to 95 wt. % of the zeolite beta.

14. The paraffin isomerization catalyst according to claim 11 , wherein the average crystal size of the zeolite beta as determined by scanning electron microscopy is of from 50 to 500 nanometers.

15. A paraffin isomerization catalyst, comprising a Group VIII noble metal impregnated onto a carrier comprising alumina and zeolite beta, wherein the zeolite beta is prepared by a process which comprises:
(a) mixing and stirring an alkali oxide source, an aluminum oxide source, a silicon dioxide source and water without addition of an organic structure directing agent (SDA) to provide an aluminosilicate synthesis gel having the following mole ratio of raw materials: SiO 2 /Al 2 O 3 =15-45, Na 2 O/SiO 2 =0.20-0.50, H 2 O/SiO 2 =4-50; and
(b) adding zeolite crystal seed and allowing the aluminosilicate synthesis gel to crystallize at elevated temperature to obtain the zeolite beta crystals having a silica to alumina molar ratio (SAR) of from 5 to 12.

16. The paraffin isomerization catalyst according to claim 15 , wherein the process comprises allowing the aluminosilicate synthesis gel to crystallize in step (b) at a temperature of from 100 to 180° C. during from 12 to 24 hours.

17. The paraffin isomerization catalyst according to claim 1 , wherein the zeolite beta has a SAR of from 5 to 11.

18. The process for isomerizing a hydrocarbon feed containing paraffins having of from 4 to 8 carbon atoms by contacting the feed with a catalyst according to claim 2 at a temperature of from 150 to 300° C. and a pressure of from 0.1 to 30 bara.

19. The process for isomerizing a hydrocarbon feed containing paraffins having of from 4 to 8 carbon atoms by contacting the feed with a catalyst according to claim 3 at a temperature of from 150 to 300° C. and a pressure of from 0.1 to 30 bara.

20. The process for isomerizing a hydrocarbon feed containing paraffins having of from 4 to 8 carbon atoms by contacting the feed with a catalyst according to claim 4 at a temperature of from 150 to 300° C. and a pressure of from 0.1 to 30 bara.

21. The process for isomerizing a hydrocarbon feed containing paraffins having of from 4 to 8 carbon atoms by contacting the feed with a catalyst according to claim 11 at a temperature of from 150 to 300° C. and a pressure of from 0.1 to 30 bara.

22. The process for isomerizing a hydrocarbon feed containing paraffins having of from 4 to 8 carbon atoms by contacting the feed with a catalyst according to claim 12 at a temperature of from 150 to 300° C. and a pressure of from 0.1 to 30 bara.

23. The process for isomerizing a hydrocarbon feed containing paraffins having of from 4 to 8 carbon atoms by contacting the feed with a catalyst according to claim 13 at a temperature of from 150 to 300° C. and a pressure of from 0.1 to 30 bara.

24. The process for isomerizing a hydrocarbon feed containing paraffins having of from 4 to 8 carbon atoms by contacting the feed with a catalyst according to claim 14 at a temperature of from 150 to 300° C. and a pressure of from 0.1 to 30 bara.

Assignees

• Shell Oil Co

Inventors

• Van Der Zon Monique
• Rogers Vincent
• Li Hong-Xin
• Cormier William Edward
• Moden Bjorn
• Pelgrim Bart
• Kijlstra Wiebe S

Classifications

• B01J2229/42

  Addition of matrix or binder particles · CPC title

• B01J35/023

  Operations & Transport · mapped topic

• B01J2229/20

  to introduce other elements in the catalyst composition comprising the molecular sieve, but not specially in or on the molecular sieve itself · CPC title

• B01J35/1038

  Operations & Transport · mapped topic

• C07C5/22

  by isomerisation (with simultaneous hydrogenation C07C5/13; with simultaneous dehydrogenation C07C5/373) · CPC title