Catalyst for producing monocyclic aromatic hydrocarbons, and method for producing monocyclic aromatic hydrocarbons

Patent metadata

Field	Value
Publication number	US-9815750-B2
Application number	US-201414466444-A
Country	US
Kind code	B2
Filing date	Aug 22, 2014
Priority date	Jul 29, 2009
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

A catalyst for producing monocyclic aromatic hydrocarbons, used for producing monocyclic aromatic hydrocarbons of 6 to 8 carbon number from a feedstock oil having a 10 volume % distillation temperature of at least 140° C. and an end point temperature of not more than 400° C., wherein the catalyst contains a crystalline aluminosilicate, gallium and/or zinc, and phosphorus, the molar ratio between silicon and aluminum (Si/Al ratio) in the crystalline aluminosilicate is not more than 100, the molar ratio between the phosphorus supported on the crystalline aluminosilicate and the aluminum of the crystalline aluminosilicate (P/Al ratio) is not less than 0.01 and not more than 1.0, and the amount of gallium and/or zinc is not more than 1.2% by mass based on the mass of the crystalline aluminosilicate.

First claim

The invention claimed is:

1. A method for producing monocyclic aromatic hydrocarbons of 6 to 8 carbon number, the method comprising bringing a feedstock oil containing polycyclic aromatic hydrocarbons and having a 10 volume % distillation temperature of at least 140° C. and an end point temperature of not more than 400° C. into contact with a catalyst comprising a medium pore size zeolite, gallium and/or zinc, and phosphorus,
wherein
a molar ratio between silicon and aluminum (Si/Al ratio) in the medium pore size zeolite is not more than 100,
a molar ratio between phosphorus supported on the medium pore size zeolite and aluminum within the medium pore size zeolite (P/Al ratio) is not less than 0.01 and not more than 1.0, and
an amount of gallium and/or zinc is not more than 1.2% by mass based on the mass of the medium pore size zeolite.

2. A method for producing monocyclic aromatic hydrocarbons of 6 to 8 carbon number, the method comprising bringing a feedstock oil containing polycyclic aromatic hydrocarbons and having a 10 volume % distillation temperature of at least 140° C. and a 90 volume % distillation temperature of not more than 350° C. into contact with a catalyst comprising a medium pore size zeolite, gallium and/or zinc, and phosphorus,
wherein
a molar ratio between silicon and aluminum (Si/Al ratio) in the medium pore size zeolite is not more than 100,
a molar ratio between phosphorus supported on the medium pore size zeolite and aluminum within the medium pore size zeolite (P/Al ratio) is not less than 0.01 and not more than 1.0, and
an amount of gallium and/or zinc is not more than 1.2% by mass based on the mass of the medium pore size zeolite.

3. The method according to claim 1 , wherein a cracked gas oil produced in a fluid catalytic cracking is used as the feedstock oil.

4. The method according to claim 1 , wherein the feedstock oil is brought into contact with the catalyst in a fluidized bed reactor.

5. The method according to claim 1 , wherein an amount of phosphorus is within a range from 0.1 to 10% by mass based on the total mass of the catalyst, and an amount of gallium and/or zinc contained within the catalyst is not more than 2% by mass based on the total mass of the catalyst.

6. The method according to claim 1 , wherein the medium pore size zeolite is a pentasil-type zeolite.

7. The method according to claim 1 , wherein the medium pore size zeolite is an MFI-type zeolite.

8. The method according to claim 1 , wherein a molar ratio between phosphorus supported on the medium pore size zeolite and aluminum within the medium pore size zeolite (P/Al ratio) is not more than 0.5.

9. The method according to claim 1 , wherein an amount of gallium and/or zinc is not more than 1.0% by mass based on a mass of the medium pore size zeolite.

10. The method according to claim 2 , wherein a cracked gas oil produced in a fluid catalytic cracking is used as the feedstock oil.

11. The method according to claim 2 , wherein the feedstock oil is brought into contact with the catalyst in a fluidized bed reactor.

12. The method according to claim 2 , wherein an amount of phosphorus is within a range from 0.1 to 10% by mass based on the total mass of the catalyst, and an amount of gallium and/or zinc contained within the catalyst is not more than 2% by mass based on the total mass of the catalyst.

13. The method according to claim 2 , wherein the medium pore size zeolite is a pentasil-type zeolite.

14. The method according to claim 2 , wherein the medium pore size zeolite is an MFI-type zeolite.

15. The method according to claim 2 , wherein a molar ratio between phosphorus supported on the medium pore size zeolite and aluminum within the medium pore size zeolite (P/Al ratio) is not more than 0.5.

16. The method according to claim 2 , wherein an amount of gallium and/or zinc is not more than 1.0% by mass based on a mass of the medium pore size zeolite.

Assignees

• Jx Nippon Oil & Energy Corp

Inventors

• Yanagawa Shinichiro
• Kobayashi Masahide
• Aoki Yuko
• Hayasaka Kazuaki

Classifications

• B01J37/28

  Phosphorising · CPC title

• C10G2400/30

  Aromatics · CPC title

• B01J29/061 Primary

  containing metallic elements added to the zeolite · CPC title

• C10G2300/1048

  Middle distillates · CPC title

• C07C2529/87

  Gallosilicates; Aluminogallosilicates; Galloborosilicates · CPC title