Process to upgrade partially converted vacuum residua

Patent metadata

Field	Value
Publication number	US-10344225-B2
Application number	US-201715407917-A
Country	US
Kind code	B2
Filing date	Jan 17, 2017
Priority date	Nov 21, 2014
Publication date	Jul 9, 2019
Grant date	Jul 9, 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 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;
an atmospheric fractionation unit to fractionate the first effluent to recover a hydrocarbon atmospheric distillate stream and a hydrocarbon atmospheric residuum 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 atmospheric distillate stream to produce a second effluent.

2. The system of claim 1 , further comprising a gasification system for converting the asphaltenes stream to a synthesis gas.

3. The system of claim 1 , further comprising an upstream conversion unit to convert a residuum stream to the partially converted residuum hydrocarbon stream.

4. The system of claim 3 , wherein the upstream 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.

5. The system of claim 1 , wherein the mass transfer device comprises a stripping tower.

6. The system of claim 4 , wherein the hydrocracking unit comprises an ebullated bed, a fixed-bed or a moving-bed hydrocracking unit.

7. The system of claim 1 , further comprising a high temperature/high pressure separator upstream of the steam stripper to produce the partially converted residuum hydrocarbon stream.

8. The system of claim 7 , wherein a vapor fraction from the high temperature/high pressure separator is fed to the fixed bed hydroconversion reactor system.

9. The system of claim 1 , further comprising a high temperature/high pressure separator upstream of the atmospheric fractionation unit to recover a vapor fraction and a liquid fraction from the first effluent of the ebullated bed hydroconversion reactor system.

10. The system of claim 9 , wherein the vapor fraction from the high temperature/high pressure separator is fed to the fixed bed hydroconversion reactor system.

11. The system of claim 9 , wherein the liquid fraction from the high temperature/high pressure separator is fed to the atmospheric fractionation unit.

Assignees

• Lummus Technology Inc
• Lummus Technology Inc

Inventors

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

Classifications

• C10G2300/1077

  Vacuum residues · CPC title

• C10G67/00 Primary

  Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one process for refining in the absence of hydrogen only · CPC title

• C10G7/06

  Vacuum distillation · CPC title

• C10G21/003 Primary

  Solvent de-asphalting · CPC title

• C10G2300/206

  Asphaltenes · CPC title