Integrated resid deasphalting and gasification

Patent metadata

Field	Value
Publication number	US-10947464-B2
Application number	US-201615390832-A
Country	US
Kind code	B2
Filing date	Dec 27, 2016
Priority date	Dec 28, 2015
Publication date	Mar 16, 2021
Grant date	Mar 16, 2021

Abstract

Systems and methods are provided for integration of use deasphalted resid as a feed for fuels and/or lubricant base stock production with use of the corresponding deasphalter rock for gasification to generate hydrogen and/or fuel for the fuels and/or lubricant production process. The integration can include using hydrogen generated during gasification as a fuel to provide heat for solvent processing and/or using the hydrogen for hydroprocessing of deasphalted oil.

First claim

The invention claimed is:

1. A method for hydroprocessing deasphalted oil, comprising:
performing solvent deasphalting in a deasphalting unit under effective solvent deasphalting conditions on a feedstock having a T5 boiling point of at least about 400° C. to form a first fraction comprising deasphalted oil and a solvent and a second fraction comprising deasphalter rock and the solvent, the effective solvent deasphalting conditions producing a yield of deasphalted oil of at least about 50 wt % of the feedstock;
recovering solvent from at least one of the first fraction and the second fraction, the recovering comprising generating heat for the recovering by combustion of a solvent recovery fuel comprising H 2 ;
gasifying at least a portion of the deasphalter rock to form synthesis gas, the solvent recovery fuel comprising at least a portion of the synthesis gas;
desulfurizing at least a portion of the synthesis gas to form a desulfurized synthesis gas;
separating at least a portion of the desulfurized synthesis gas to form an H 2 -enriched stream;
hydroprocessing at least a portion of the deasphalted oil in a hydroprocessing unit under first effective hydroprocessing conditions in the presence of an H 2 -containing gas to form a hydroprocessed effluent comprising a sulfur content of 500 wppm or less, the H 2 -containing gas comprising at least a portion of the H 2 -enriched stream;
forming a fuel source by combining at least a portion of the synthesis gas and a hydrogen-containing purge stream;
introducing a first portion of the fuel source to a deasphalting unit furnace;
heating the deasphalting unit by using the first portion of the fuel source in the deasphalting unit furnace;
introducing a second portion of the fuel source to a hydroprocessing heating unit;
heating the hydroprocessing unit by using the second portion of the fuel source in the hydroprocessing heating unit;
purifying at least a portion of the desulfurized synthesis gas to form a hydrogen stream;
compressing the hydrogen stream to form a compressed hydrogen stream; and
introducing the compressed hydrogen stream to the hydroprocessing unit;
separating the hydroprocessed effluent to form at least a fuels boiling range fraction and a bottoms fraction; hydroprocessing at least a portion of the hydroprocessed bottoms fraction under second effective hydroprocessing conditions, the second effective hydroprocessing conditions comprising hydrocracking conditions and catalytic dewaxing conditions, to form a catalytically dewaxed effluent comprising a 950° F.+ (510° C.+) portion having a VI of at least 80 and a pour point of −6° C. or less; and at least one of: a) solvent extracting at least a portion of the catalytically dewaxed effluent to form a solvent processed effluent, and b) solvent dewaxing at least a portion of the catalytically dewaxed effluent to form a solvent processed effluent, wherein the catalytically dewaxed effluent is underdewaxed; wherein the solvent processed effluent has a cloud point of −2° C. or less.

2. The method of claim 1 , further comprising combusting at least a portion of the synthesis gas, the H 2 -enriched stream, or a combination thereof in a combustion zone of a gas turbine for generation of electricity.

3. The method of claim 1 , wherein the solvent deasphalting comprises deasphalting with a C 4 solvent, a C 5 solvent, or a combination thereof.

4. The method of claim 1 , further comprising performing water gas shift on at least one of the synthesis gas and the desulfurized synthesis gas prior to separating the at least a portion of the desulfurized synthesis gas to form the H 2 -enriched stream.

5. The method of claim 1 , further comprising heating the at least a portion of the deasphalted oil prior to the hydroprocessing, the heating comprising combusting at least a portion of the synthesis gas, the desulfurized synthesis gas, or a combination thereof to generate heat.

6. The method of claim 1 , wherein separating at least a portion of the desulfurized synthesis gas to form an H 2 -enriched stream comprises performing a swing adsorption process on the at least a portion of the desulfurized synthesis gas to form at least the H 2 -enriched purge stream and an H 2 -containing purge stream.

7. The method of claim 1 , further comprising combusting a portion of the synthesis gas, the desulfurized synthesis gas, or a combination thereof in a combustion zone of a gas turbine.

8. The method of claim 1 , wherein hydroprocessing at least a portion of the deasphalted oil comprises demetallizing the at least a portion of the deasphalted oil, hydrotreating the at least a portion of the deasphalted oil, hydrocracking the at least a portion of the deasphalted oil, or a combination thereof.

9. The method of claim 1 , wherein the yield of deasphalted oil is at least 55 wt %.

10. The method of claim 1 , wherein the deasphalted oil has an aromatics content of at least 50 wt % based on a weight of the deasphalted oil.

11. The method of claim 1 , wherein gasifying at least a portion of the deasphalter rock comprises gasifying deasphalter rock treated with an anti-tack agent.

Assignees

• Exxonmobil Res & Eng Co

Inventors

• Fruchey Kendall S
• Green Sara K
• Kovvali Anjaneya S
• Hilbert Timothy L
• Carroll Michael B
• Dandekar Ajit B
• Yohe Sara L
• Brown Stephen H
• Owens Tracie L
• Ross April D
• Senzer Eric B
• Pyl Steven

Classifications

• Y02P20/129

  Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines · CPC title

• C10G67/0445

  The hydrotreatment being a hydrocracking · CPC title

• C10N2030/02

  Pour-point; Viscosity index · CPC title

• C10G2300/202

  Heteroatoms content, i.e. S, N, O, P · CPC title

• C01B2203/0283

  containing a CO-shift step, i.e. a water gas shift step · CPC title