Process for making diesel by oligomerization

Patent metadata

Field	Value
Publication number	US-9441173-B2
Application number	US-201314074662-A
Country	US
Kind code	B2
Filing date	Nov 7, 2013
Priority date	Nov 12, 2012
Publication date	Sep 13, 2016
Grant date	Sep 13, 2016

Abstract

Disclosed is that by oligomerizing C 4 olefins over a uni-dimensional 10-ring pore structured zeolite catalyst, at least 70 wt % oligomers having at least 9 carbons can be produced in a single pass.

First claim

The invention claimed is:

1. A process for oligomerizing light olefins to diesel comprising contacting an oligomerization feed comprising C 4 olefins with an oligomerization catalyst comprising a zeolite having a uni-dimensional 10-ring pore structure in an oligomerization reactor and oligomerizing olefins in the oligomerization feed to product oligomers, wherein at least 70 wt % of the product oligomers have nine or more carbons per molecule after a single pass through the oligomerization reactor.

2. The process of claim 1 wherein said catalyst has an MTT structure.

3. The process of claim 1 wherein a maximum temperature of a bed of the oligomerization catalyst is between about 200 and about 250° C.

4. The process of claim 3 wherein a maximum temperature of a bed of the oligomerization catalyst is between about 220 and about 240° C.

5. The process of claim 1 wherein said oligomerization feed comprises C 5 olefins.

6. The process of claim 1 wherein the pressure in the oligomerization reactor is between about 5.5 MPa and about 6.9 MPa.

7. The process of claim 1 wherein the catalyst comprises between about 10 and about 35 wt % MTT zeolite loaded on a support.

8. The process of claim 7 wherein the catalyst comprises an alumina support.

9. The process of claim 1 wherein the product oligomers having nine or more carbons per molecule have a cetane of at least 30.

10. A process for oligomerizing light olefins to diesel comprising contacting an oligomerization feed comprising C 4 olefins with an oligomerization catalyst comprising a zeolite having an MTT structure in an oligomerization reactor and oligomerizing olefins in the oligomerization feed to product oligomers, wherein at least 70 wt % of the product oligomers have nine or more carbons per molecule after a single pass through the oligomerization reactor.

11. The process of claim 10 wherein a maximum temperature of a bed of the oligomerization catalyst is between about 200 and about 250° C.

12. The process of claim 10 wherein at least 70 wt % of the product oligomers have twelve or more carbons per molecule after a single pass through the oligomerization reactor.

13. The process of claim 10 wherein said oligomerization feed comprises C 5 olefins.

14. The process of claim 10 wherein the catalyst comprises between about 15 and about 35 wt % MTT zeolite loaded on a support.

15. A process for oligomerizing light olefins to diesel comprising contacting an oligomerization feed comprising C 4 and C 5 olefins with an oligomerization catalyst comprising a zeolite having a uni-dimensional 10-ring pore structure in an oligomerization reactor and oligomerizing olefins in the oligomerization feed to product oligomers, wherein at least 70 wt % of the product oligomers have nine or more carbons per molecule after a single pass through the oligomerization reactor.

16. The process of claim 15 wherein said catalyst has an MTT structure.

17. The process of claim 16 wherein a maximum temperature of a bed of the oligomerization catalyst is between about 200 and about 250° C.

18. The process of claim 16 wherein at least 70 wt % of the product oligomers have twelve or more carbons per molecule after a single pass through the oligomerization reactor.

19. The process of claim 16 wherein the catalyst comprises between about 15 and about 35 wt % MTT zeolite loaded on a support.

20. The process of claim 1 wherein at least about 70 wt % of the product oligomers have twelve or more carbons per molecule after a single pass through the oligomerization reactor.

Assignees

• Uop Llc

Inventors

• Nicholas Christopher P
• Krupa Steven L
• Vanden Bussche Kurt M
• Kruse Todd M

Classifications

• C10G11/18

  according to the "fluidised-bed" technique · CPC title

• C10G2300/307

  Cetane number, cetane index · CPC title

• C10G2300/1092

  C2-C4 olefins · CPC title

• C10G50/00 Primary

  Production of liquid hydrocarbon mixtures from lower carbon number hydrocarbons, e.g. by oligomerisation · CPC title

• C10G2300/1088

  Olefins · CPC title