Catalyst and isomerisation process

Patent metadata

Field	Value
Publication number	US-9597670-B2
Application number	US-200913002381-A
Country	US
Kind code	B2
Filing date	Jun 24, 2009
Priority date	Jul 4, 2008
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

An alkylaromatics isomerisation catalyst, which catalyst comprises at least 50 wt % of an inorganic binder; at least 0.01 wt % of a Group VIII metal and 1-9 wt % ZSM-12 zeolite wherein the silica to alumina molar ratio (SAR) of the ZSM-12 zeolite is in the range of from 60 to 200, and a process for the isomerisation of alkylaromatics to provide a reaction mixture, said process comprising contacting a hydrocarbon stream comprising alkylaromatics with such catalyst.

First claim

That which is claimed is:

1. An ethylbenzene conversion catalyst, which catalyst comprises:
more than 90 wt % of a wide pore alumina binder having a pore volume of at least 0.6 cc/g up to 2 cc/g and an average pore volume greater than 80 Å;
platinum metal in an amount in the range of from 0.1 to 0.6 wt % based on the total weight of said catalyst;
from 1 to 9 wt % ZSM-12 zeolite having a silica to alumina molar ratio (SAR) in the range of from 60 to 200; and
an absence of lead.

2. A catalyst as claimed in claim 1 , wherein the catalyst is an extrudate.

3. A catalyst as claimed in claim 2 , wherein the pore volume of the inorganic binder is at least 1.2 cc/g.

4. A catalyst as claimed in claim 3 , wherein the bulk density of the inorganic binder is less than 0.25 g/cc.

5. A catalyst as claimed in claim 4 , wherein the SAR of the ZSM-12 zeolite is in the range of from 70 to 150.

6. A catalyst as claimed in claim 5 , which catalyst comprises 1-7 wt % ZSM-12 zeolite.

7. A catalyst as claimed in claim 6 , wherein the ZSM-12 zeolite has an average crystal size in the range of 30 to 70 nm.

8. A catalyst as claimed in claim 7 , wherein the ZSM-12 zeolite has a crystallinity greater than 94%.

9. An alkylaromatics isomerization catalyst, comprising:
more than 80 wt % of a wide pore alumina binder having a pore volume of at least 0.6 cc/g up to 2 cc/g and an average pore volume greater than 80 Å;
platinum in an amount in the range of from 0.1 to 0.6 wt %;
from 1 to 9 wt %, based on the total weight of said catalyst, zeolite ZSM-12 having a silica-to-alumina molar ratio (SAR) in the range of from 60 to 200;
an absence of lead; and
an absence of chlorine.

10. An alkylaromatics isomerization catalyst as recited in claim 9 , wherein said wide pore alumina binder has a nitrogen pore volume of at least 1.2 cc/g and up to 2 cc/g.

11. An alkylaromatics isomerization catalyst as recited in claim 9 , wherein the crystal morphology of said zeolite ZSM-12 is such that it has an average crystal size in the range of from 30 to 70 nm, a surface area of more than 250 m 2 /g measured by the nitrogen adsorption method, and a crystallinity of greater than 94%.

12. An alkylaromatics isomerization catalyst as recited in claim 9 , wherein said wide pore alumina binder has an average pore diameter greater than 90 Å.

13. An alkylaromatics isomerization catalyst as recited in claim 9 , wherein said zeolite ZSM-12 has a SAR in the range of from 70 to 150.

14. An alkylaromatics isomerization catalyst as recited in claim 9 , wherein said wide pore alumina binder is present in said catalyst in an amount of more than 90 wt %, based on the weight of said catalyst.

15. An alkylaromatics isomerization catalyst as recited in claim 9 , wherein said zeolite ZSM-12 is present in said catalyst in an amount in the range of from 1 to 7 wt %.

16. An alkylaromatics isomerization catalyst as recited in claim 9 , said surface area of said zeolite ZSM-12 is of more than 280 m 2 /g.

17. An alkylaromatics isomerization catalyst as recited in claim 9 , wherein said zeolite ZSM-12 is present in said catalyst in an amount in the range of from 3 to 5 wt %, wherein said alumina is present in said catalyst in an amount of more than 95 wt %.

18. An alkylaromatics isomerization catalyst as recited in claim 9 , wherein said wide pore alumina binder has a bulk density less than 0.25 g/cc.

19. A catalyst as claimed in claim 1 , wherein the catalyst additionally comprises an absence of chlorine.

Assignees

• Ballegoy Carolus Maria
• Captain Dinyar Khushroo
• Van Giezen Joseph Cornelis
• Keyzer Lucas Petrus Simon
• Nenu Nicoleta Cristina
• Van Vegchel Ingrid Maria
• Shell Oil Co

Inventors

• Ballegoy Carolus Maria
• Captain Dinyar Khushroo
• Van Giezen Joseph Cornelis
• Keyzer Lucas Petrus Simon
• Nenu Nicoleta Cristina
• Van Vegchel Ingrid Maria

Classifications

• B01J35/77

  Compounds characterised by their crystallite size · CPC title

• B01J35/70

  characterised by their crystalline properties, e.g. semi-crystalline (catalysts comprising carbon B01J21/18; molecular sieves B01J29/00) · CPC title

• B01J35/45

  Nanoparticles · CPC title

• B01J35/32

  Bulk density · CPC title

• B01J29/7469 Primary

  MTW-type, e.g. ZSM-12, NU-13, TPZ-12 or Theta-3 · CPC title