Phase-transfer catalyzed destruction of fouling agents in petroleum streams

• US 6,471,852 B1
• Filed: 04/18/2000
• Issued: 10/29/2002
• Est. Priority Date: 04/18/2000
• Status: Expired due to Term

• Current Assignee: ExxonMobil Research & Engineering Company (Exxon Mobil Corporation)
• Original Assignee: ExxonMobil Research & Engineering Company (Exxon Mobil Corporation)
• Inventors: Mark, A. Greaney, Siskin, Michael
• Primary Examiner(s): Yildirim, Bekir L.
• Application Number:
  US09/551,470
• Time in Patent Office: 924 Days
• Field of Search: 208/48.AA, 208/48.R
• US Class Current: 208/48.0AA
• CPC Class Codes: C10G 75/04 by addition of antifouling agents

Abstract

The present invention is a process to reduce the fouling of equipment for processing petroleum feedstreams. The fouling is reduced by reducing the presence of peroxides and hydroperoxides in the feedstream. The steps of the process include mixing the feedstream with an aqueous phase containing a base and a phase transfer catalyst. The base reacts with the peroxides and hydroperoxides. The oil phase can then be further processed with minimum fouling of the equipment. The aqueous phase is recycled for reacting with fresh petroleum feedstream.

Claims

1. A process to reduce peroxides that cause the fouling of equipment for processing petroleum feedstreams in a refinery comprising (a) mixing said petroleum feedstream with an aqueous phase including a phase transfer catalyst and a base;

and (b) separating said petroleum feedstream.

2. The process of claim 1 further comprising the step of processing said petroleum feedstream.

3. The process of claim 1 further comprising the step of recycling said aqueous phase.

4. The process of claim 1 wherein said phase transfer catalyst is a polyethylene glycol.

5. The process of claim 1 wherein phase transfer catalyst is a quaternary phosphonium.

6. The process of claim 1 wherein phase transfer catalyst is a crown ether.

7. The process of claim 1 wherein phase transfer catalyst is an open chain polyether.

8. The process of claim 5 wherein phase transfer catalyst is a tetrabutylammonium hydroxide.

9. The process of claim 7 wherein phase transfer catalyst is a polyethylene glycol.

10. The process of claim 1 wherein said base is sodium hydroxide.

11. The process of claim 1 wherein said base is potassium hydroxide.

12. The process of claim 1 wherein said base is ammonium hydroxide.

13. The process of claim 1 wherein said base is sodium carbonate.

14. The process of claim 1 wherein said base is potassium carbonate.