System and process for the hydroconversion of heavy oils

Patent metadata

Field	Value
Publication number	US-9708554-B2
Application number	US-201414584539-A
Country	US
Kind code	B2
Filing date	Dec 29, 2014
Priority date	May 23, 2007
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

Provided is a system for the hydroconversion of heavy oils essentially consisting of a solid accumulation reactor and a stripping section of the products of hydroconversion outside or inside the reactor itself.

First claim

The invention claimed is:

1. A system for the hydroconversion of heavy oils consisting essentially of a solid accumulation reactor and a stripping section of the products of hydroconversion outside the reactor itself,
wherein the reactor is equipped with means for the external circulation of a reaction mass, comprising a circulation pump and recirculation ducts, from a lower side point to a side point in an upper part of the reactor itself, and
wherein the stripping section is positioned so as to effect stripping by entry of hot gas into the recirculation ducts in delivery from the circulation pump.

2. A system for the hydroconversion of heavy oils consisting essentially of a solid accumulation reactor and a stripping section of the products of hydroconversion inside the reactor itself,
wherein inside the reactor there are also means, comprising a circulation pump and a recircualtion duct, for the internal recirculation of a reaction mass from a lower side point to a side point in the upper part of the reactor itself, and
wherein the stripping section is positioned so as to effect stripping by entry of hot gas into the same recirculation duct.

3. The system according to claim 1 or 2 , wherein the solid accumulation reactor is a stirred tank reactor or a bubble tower reactor.

4. The system according to claim 2 , wherein the stripping section is also positioned so as to effect stripping in the upper part of the reactor itself, and wherein the reactor is a partially filled reactor.

5. The system according to claim 1 , which further comprises a liquid-vapor separator, optionally comprising a cyclone, wherein the liquid-vapor separator is positioned downstream of the reactor and the stripping section is positioned between the reactor and the liquid-vapor separator.

6. The system according to claim 5 , which further comprises a liquid-vapor separator, optionally comprising a cyclone,
wherein
the liquid-vapor separator is positioned downstream of the reactor,
the stripping section is positioned so as to effect stripping in the upper part of the reactor, and
the reactor is totally filled.

7. The system according to claim 6 , which further comprises a stripping section outside of the reactor.

8. The system according to claim 5 , which further comprises a stripping section inside the reactor.

9. The system according to claim 1 or 2 , which further comprises a liquid-vapor separator, optionally comprising a cyclone, and a further stripping section outside the reactor and positioned in the liquid-vapor separator or downstream thereof so as to effect stripping outside the reactor and ensure the recirculation of the stripped liquid by means of the circulation pump to the reactor itself.

10. The system according to claim 1 , wherein the reactor contains no elements inside thereof which can prevent a uniform stirring of a reaction mass.

11. A process for the hydroconversion of a heavy oil, comprising sending the heavy oil to the system of claim 1 and hydroconverting the heavy Oil therein, wherein
the reactor contains a hydrogenation catalyst in a slurry phase, and
hydrogen or a mixture of hydrogen and H 2 S are fed into the reactor.

12. A process for the hydroconversion of a heavy oil, comprising sending the heavy oil to the system of claim 2 and hydroconverting the heavy oil therein, wherein
the reactor contains a hydrogenation catalyst in a slurry phase, and
hydrogen or a mixture of hydrogen and H 2 S are fed into the reactor.

13. The process according to claim 11 or 12 , wherein the hydroconversion products are obtained exclusively in a vapor phase.

14. The system according to claim 1 , which further comprises a liquid-vapor separator, optionally comprising a cyclone, wherein the liquid-vapor separator is positioned downstream of the reactor and the stripping section is positioned in the liquid-vapor separator.

15. The system according to claim 1 , which further comprises a liquid-vapor separator, optionally comprising a cyclone, wherein the liquid-vapor separator is positioned downstream of the reactor and the stripping section is positioned downstream of the liquid-vapor separator.

Assignees

• Eni Spa

Inventors

• Patron Luigi
• Bellussi Giuseppe
• Tagliabue Lorenzo
• Piccolo Vincenzo

Classifications

• C10G2300/107

  Atmospheric residues having a boiling point of at least about 538 °C · CPC title

• B01J2208/00893

  Feeding means for the reactants · CPC title

• B01J8/22

  gas being introduced into the liquid · CPC title

• C10G67/02 Primary

  plural serial stages only · CPC title

• B01J2208/00823

  Mixing elements · CPC title