Process to upgrade partially converted vacuum residua

Patent metadata

Field	Value
Publication number	US-10370603-B2
Application number	US-201515522342-A
Country	US
Kind code	B2
Filing date	Oct 27, 2015
Priority date	Nov 21, 2014
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

Abstract

Processes for upgrading partially converted vacuum residua hydrocarbon feeds are disclosed. The upgrading processes may include: steam stripping the partially converted vacuum residua to generate a first distillate and a first residuum; solvent deasphalting the first residuum stream to generate a deasphalted oil and an asphaltenes fraction; vacuum fractionating the deasphalted oil to recover a deasphalted gas oil distillate and a heavy deasphalted residuum; contacting the first distillate and the deasphalted gas oil distillate and hydrogen in the presence of a first hydroconversion catalyst to produce a product; contacting the heavy deasphalted residuum stream and hydrogen in the presence of a second hydroconversion catalyst to produce an effluent; and fractionating the effluent to recover a hydrocracked atmospheric residua and a hydrocracked atmospheric distillate.

First claim

What is claimed:

1. A process for upgrading a partially converted vacuum residua, comprising:
stripping the partially converted vacuum residua utilizing a non-reactive stripping medium to generate a first distillate and a first residuum;
solvent deasphalting the first residuum to generate a deasphalted oil and an asphaltenes fraction;
vacuum fractionating the deasphalted oil to recover a deasphalted gas oil distillate and a heavy deasphalted residuum;
contacting the first distillate and the deasphalted gas oil distillate and hydrogen in the presence of a first hydroprocessing catalyst to produce a first hydroprocessing effluent;
contacting the heavy deasphalted residuum and hydrogen in the presence of a second hydroconversion catalyst to produce a second hydroprocessing effluent; and
separating the second hydroprocessing effluent to recover a hydrocracked vapor and a hydrocracked liquid.

2. The process of claim 1 , wherein the partially converted vacuum residua comprises an effluent from an upstream conversion process.

3. The process of claim 1 , further comprising solvent deasphalting the hydrocracked liquid with the first residuum.

4. The process of claim 1 , further comprising separating the partially converted vacuum residua into a partially converted vacuum residua liquid and a partially converted vacuum residua vapor.

5. The process of claim 4 , further comprising contacting the partially converted vacuum residua vapor in the presence of the first hydroconversion catalyst at conditions of temperature and pressure to produce the first hydroprocessing effluent.

6. The process of claim 4 , further comprising combining the partially converted vacuum residua vapor with the deasphalted gas oil distillate.

7. The process of claim 1 , wherein contacting the first distillate and the deasphalted gas oil distillate and hydrogen in the presence of a first hydroprocessing catalyst further comprises contacting the hydrocracked liquid with the first hydroconversion catalyst.

8. The process of claim 4 , wherein contacting the first distillate and the deasphalted gas oil distillate and hydrogen in the presence of a first hydroprocessing catalyst further comprises contacting the hydrocracked liquid, the deasphalted gas oil distillate, and the partially converted vacuum residua vapor, or combinations thereof, with the first hydroconversion catalyst.

9. The process of claim 2 , wherein the upstream conversion process comprises a hydrocracking unit, a vac resid coking unit, a hydrothermolysis unit, a hydropyrolysis unit, a pyrolysis unit, an oil shale retorting unit, a biomass pyrolysis unit, a biomass hydropyrolysis unit, a biomass hydrothermolysis unit, a tar sands extraction unit, a steam assisted gravity drainage process, a toe to heel air injection process, an in situ petroleum extraction process, or a combination thereof.

10. The process of claim 1 , wherein the first hydroconversion catalyst is within a fixed bed and the second hydroconversion catalyst is within an ebullated bed reactor.

11. The process of claim 1 , wherein the first hydroconversion catalyst is within a fixed bed and the second hydroconversion catalyst is within a slurry reactor.

12. The process of claim 1 , wherein stripping further comprises stripping the hydrocracked vapor.

13. A system for upgrading partially converted residuum hydrocarbons, the system comprising:
a mass transfer device to strip a partially converted residuum hydrocarbon stream into a first distillate stream and a first residuum stream;
a solvent deasphalting unit for recovering a deasphalted oil stream and an asphaltenes stream from the first residuum stream;
a vacuum fractionation unit to fractionate the deasphalted oil stream to recover a deasphalted gas oil stream and a heavy deasphalted residuum stream;
an ebullated bed hydroconversion reactor system for contacting the heavy deasphalted residuum stream and hydrogen with a first hydroconversion catalyst to produce a first effluent;
a separation unit to recover a hydrocarbon liquid stream and a hydrocarbon vapor stream;
a fixed bed hydroconversion reactor system for contacting at least one of the first distillate stream, the deasphalted gas oil stream, and the hydrocarbon liquid stream to produce a second effluent.

14. The system of claim 13 , further comprising a partial upgrading conversion unit to convert a residuum stream to the partially converted residuum stream.

15. The system of claim 14 , wherein the partial upgrading conversion unit is selected from the group consisting of a hydrocracking unit, a vac resid coking unit, a hydrothermolysis unit, a hydropyrolysis unit, a pyrolysis unit, an oil shale retorting unit, a biomass pyrolysis unit, a biomass hydropyrolysis unit, a biomass hydrothermolysis unit, a tar sands extraction unit, a steam assisted gravity drainage process, a toe to heel air injection process, an in situ petroleum extraction processes, or a combination thereof.

16. The system of claim 15 , wherein the hydrocracking unit comprises an ebullated bed, a fixed-bed or a moving-bed hydrocracking unit.

17. The system of claim 13 , further comprising a first high temperature high pressure separator upstream of the mass transfer device to produce the partially converted residuum hydrocarbon stream.

18. The system of claim 17 , wherein a vapor fraction from the first high temperature high pressure separator is fed to the fixed bed hydroconversion reactor system.

19. The system of claim 13 , wherein the separation unit is a second high pressure high temperature separator unit.

20. The system of claim 19 , wherein the vapor fraction from the second high temperature high pressure separator is fed to the fixed bed hydroconversion reactor system.

21. The system of claim 19 , wherein the liquid fraction from the second high temperature high pressure separator is fed to the mass transfer unit.

22. The system of claim 19 , wherein the liquid fraction from the second high temperature high pressure separator is fed to the solvent deasphalting unit.

23. A process for upgrading a partially converted vacuum residua, comprising:
stripping with a mass transfer device the partially converted vacuum residua to generate a first distillate and a first residuum;
deasphalting with a solvent deasphalting unit the first residuum to generate a deasphalted oil and an asphaltenes fraction;
fractionating with a vacuum fractionation unit the deasphalted oil to recover a deasphalted gas oil distillate and a heavy deasphalted residuum;
contacting the first distillate and the deasphalted gas oil distillate and hydrogen in the presence of a first hydroprocessing catalyst in an fixed bed hydroconversion reactor to produce a first hydroprocessing effluent;
contacting the heavy deasphalted residuum and hydrogen in the presence of a second hydroconversion catalyst in a ebullated bed hydroconversion reactor system to produce a second hydroprocessing effluent; and
separating with a high pressure high temperature separator unit the second hydroprocessing effluent to recover a hydrocracked residua and a hydrocracked distillate.

Assignees

• Lummus Technology Inc

Inventors

• Mukherjee Ujjal K
• Baldassari Mario C
• Greene Marvin I

Classifications

• C10G65/14

  plural parallel stages only · CPC title

• C10G2300/206

  Asphaltenes · CPC title

• C10G21/003 Primary

  Solvent de-asphalting · CPC title

• C10G2300/1077

  Vacuum residues · CPC title

• C10G67/049 Primary

  The hydrotreatment being a hydrocracking · CPC title