CATALYST COMPOSITION, ITS PREPARATION AND USE

• US 20100249479A1
• Filed: 07/28/2008
• Published: 09/30/2010
• Est. Priority Date: 07/31/2007
• Status: Active Grant

• Current Assignee: Shell Oil Company (Shell Plc)
• Original Assignee: Shell Oil Company (Shell Plc)
• Inventors: Van Vegghel, Ingrid Maria, Berg-Slot, Johanna Jacoba, Domokos, László
• Granted Patent: US 9,029,283 B2
• Time in Patent Office: Days
• US Class Current: 585/489
• CPC Class Codes: B01J 2229/16 to increase the Si/Al ratio; Dealumination
• CPC Class Codes: B01J 2229/20 to introduce other elements in the catalyst composition comprising the molecular sieve, but not specially in or on the molecular sieve itself
• CPC Class Codes: B01J 2229/42 Addition of matrix or binder particles
• CPC Class Codes: B01J 23/626 with tin
• CPC Class Codes: B01J 29/405 containing rare earth elements, titanium, zirconium, hafnium, zinc, cadmium, mercury, gallium, indium, thallium, tin or lead
• CPC Class Codes: B01J 29/44 Noble metals
• CPC Class Codes: B01J 37/0009 Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
• CPC Class Codes: C07C 15/04 Benzene
• CPC Class Codes: C07C 2529/44 Noble metals
• CPC Class Codes: C07C 4/18 Catalytic processes
• CPC Class Codes: Y02P 20/52 using catalysts, e.g. selective catalysts

Abstract

A catalyst composition which comprises: a) a carrier which comprises at least 30 wt % of a binder selected from silica, zirconia and titania; at least 20 wt % of a pentasil zeolite, having a bulk silica to alumina ratio in the range of from 20 to 150 and being in its H⁺ form; and less than 10 wt % of other components, all percentages being on the basis of total carrier; b) platinum in an amount in the range of from 0.001 to 0.1 wt %, on the basis of total catalyst; and c) tin in an amount in the range of from 0.01 to 0.5 wt %, on the basis of total catalyst; its preparation and use; are provided.

Claims

1. A catalyst composition which comprises:

a carrier, which comprises at least 30 wt % of a binder selected from silica, zirconia and titania;

at least 20 wt % of a pentasil zeolite, having a bulk silica to alumina ratio in the range of from 20 to 150 and being in its H⁺ form;

up to than 10 wt % of other components, all percentages being on the basis of total carrier;

platinum in an amount in the range of from 0.001 to 0.1 wt %, on the basis of total catalyst; and

tin in an amount in the range of from 0.01 to 0.5 wt %, on the basis of total catalyst.

2. The catalyst composition as claimed in claim 1, wherein the carrier is composed of in the range of from 30 to 80 wt % silica, and in the range of from 20 to 70 wt % zeolite.

3. The catalyst composition as claimed in claim 2, wherein the carrier has been subjected to a dealumination treatment with ammonium hexafluorosilicate.

4. The catalyst composition as claimed in claim 3, wherein the pentasil zeolite is one having an MFI configuration.

5. The catalyst composition as claimed in claim 4, wherein the zeolite having the MFI configuration is ZSM-5.

6. The catalyst composition as claimed in claim 5, wherein the ZSM-5 has a SAR in the range of from 20 to 50 and is present in the carrier in an amount in the range of from 20 to 50 wt %.

8. A process for the preparation of a catalyst composition as claimed in claim 1, which comprises combining at least 30 wt % of a binder selected from silica, zirconia and titania, at least 20 wt % of a pentasil zeolite, and less than 10 wt % of an optional other component, shaping the resulting mixture, if desired, and compositing within the range of from 0.001 to 0.1 wt % platinum, and in the range of from 0.01 to 0.5 wt % of tin.

10. An ethylbenzene dealkylation process which comprises contacting in the presence of hydrogen a feedstock which comprises ethylbenzene, with a catalyst composition as claimed in claim 8.

7. The catalyst composition as claimed in 6, wherein the silica has a mean particle size in the range of from 2 to 60 μ

m.

9. An ethylbenzene dealkylation process which comprises contacting in the presence of hydrogen a feedstock which comprises ethylbenzene, with a catalyst composition as claimed in claim 7.