Hydrotreating process and controlling a temperature thereof

• US 8,911,616 B2
• Filed: 04/26/2011
• Issued: 12/16/2014
• Est. Priority Date: 04/26/2011
• Status: Active Grant

• Current Assignee: UOP Llc (Honeywell International Inc.)
• Original Assignee: UOP Llc (Honeywell International Inc.)
• Inventors: Banerjee, Soumendra, Hoehn, Richard, Varadarajan, Srinivasa Gopalan
• Primary Examiner(s): Singh, Prem C
• Assistant Examiner(s): Doyle, Brandi M
• Application Number:
  US13/093,914
• Publication Number:
  US 20120273394A1
• Time in Patent Office: 1,330 Days
• Field of Search: 208/48, 208/49, 208/57, 208/80, 208/144, 208/211, 208/218, 208/264
• US Class Current: 208/264
• CPC Class Codes: C10G 2300/1044 Heavy gasoline or naphtha having a boiling range of about 100 - 180 °C
• CPC Class Codes: C10G 2300/4006 Temperature
• CPC Class Codes: C10G 45/08 in combination with chromium, molybdenum, or tungsten metals, or compounds thereof
• CPC Class Codes: C10G 45/32 Selective hydrogenation of the diolefin or acetylene compounds
• CPC Class Codes: C10G 45/38 in combination with chromium, molybdenum or tungsten metals, or compounds thereof
• CPC Class Codes: C10G 49/04 containing nickel, cobalt, chromium, molybdenum, or tungsten metals, or compounds thereof
• CPC Class Codes: C10G 65/04 including only refining steps
• CPC Class Codes: C10G 65/06 at least one step being a selective hydrogenation of the diolefins

Abstract

One exemplary embodiment can be a hydrotreating process. The hydrotreating process can include providing a first feed stream having a coker naphtha with a bromine number of about 10-about 120, combining the first feed stream with a second feed stream having a straight run naphtha with a bromine number of less than about 10 to create a combined feed, providing the combined feed to a hydrotreating reactor having at least one catalyst bed, and separating a quench stream from the second feed stream and providing the quench stream after the at least one catalyst bed.

Claims

1. A hydrotreating process, comprising:

A) providing a first feed stream comprising a coker naphtha with a bromine number of about 10-about 120;

B) combining the first feed stream with a second feed stream comprising a straight run naphtha with a bromine number less than about 10 to create a combined feed;

C) providing the combined feed to a hydrotreating reactor having at least one catalyst bed; and

D) separating a quench stream from the second feed stream and providing the quench stream after the at least one catalyst bed.

2. The hydrotreating process according to claim 1, wherein the at least one catalyst bed comprises a catalyst comprising nickel and molybdenum or cobalt, nickel, and molybdenum.

3. The hydrotreating process according to claim 1, wherein the hydrotreating reactor comprises first, second, and third catalyst beds.

4. The hydrotreating process according to claim 3, wherein the quench stream is split into a first quench stream and a second quench stream.

5. The hydrotreating process according to claim 4, wherein the first quench stream is provided after a first catalyst bed and the second quench stream is provided after a second catalyst bed.

6. The hydrotreating process according to claim 5, wherein the coker naphtha and straight run naphtha, independently, comprise one or more C5-C12 hydrocarbons.

7. The hydrotreating process according to claim 6, further comprising providing a third quench stream comprising hydrogen after the third catalyst bed.

8. The hydrotreating process according to claim 1, further comprising passing the first feed stream through a diolefin saturation reactor before combining a treated first feed stream with the second feed stream.

9. The hydrotreating process according to claim 8, wherein the treated first feed stream has a diene value of less than about 2.

10. The hydrotreating process according to claim 1, wherein the coker naphtha has a diene value of greater than about 2 prior to passing through the diolefin saturation reactor.

11. A process for controlling a temperature in a reactor, comprising:

providing to the reactor a quench stream comprising a naphtha having a bromine number of less than about 10, and a feed stream comprising a naphtha having a diene value of greater than about 2 and a bromine number of about 10-about 120 and splitting a portion of another feed stream comprising a straight run naphtha as the quench stream and combining a remaining portion of the another feed stream with the feed stream to the reactor.

12. The process according to claim 11, wherein the feed stream is passed through a diolefin saturation reactor to lower a diolefin content in the feed stream.

13. The process according to claim 11, further comprising combining the another portion of the another feed stream with an effluent of the diolefin saturation reactor.

14. The process according to claim 11, wherein the reactor is a hydrotreating reactor operating at the temperature of about 200-about 400°

C.

15. The process according to claim 11, further comprising providing another quench stream comprising hydrogen downstream of the quench stream comprising the straight run naphtha.

16. A process for hydrotreating a coker naphtha while minimizing a liquid recycle, comprising:

providing a naphtha having an effective amount of olefins and diolefins as a quench stream to a hydrotreating reactor; and

combining a portion of said naphtha with a coker naphtha with a bromine number of about 10-about 120; and

providing the combined feed to a hydrotreating reactor having at least one catalyst bed.

17. The process according to claim 16, wherein the hydrotreating reactor comprises at least three catalyst beds and the quench stream is provided downstream of a first catalyst bed.

18. The process according to claim 16, wherein the effective amount of olefins and diolefins is determined by the naphtha having, respectively, a bromine number of less than about 10 and a diene value of less than about 2.