Method for producing high quality base oils using multiple stage processing

a technology of base oil and processing method, which is applied in the direction of hydrocarbon oil treatment products, metal/metal-oxide/metal-hydroxide catalysts, physical/chemical process catalysts, etc., can solve the negative impact of pouring and clouding points of fractions, base oil still may have undesirable levels of aromatics, residual organic sulfur, and/or nitrogen, etc., to improve the low temperature properties, and improve the viscosity index

Pending Publication Date: 2022-07-21
CHEVROU USA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0002]Modern refining processes for producing lubricating oils from crudes typically use a number of hydrogen processes. The processes are employed to produce lubricating oils having suitable lubricating properties over a wide range of operating conditions. Hydrotreating/hydrocracking is generally an upgrading process for increasing viscosity index by removing low viscosity index molecules, including molecules containing sulfur and nitrogen. Hydrodewaxing is typically a process for improving the low temperature properties by isomerizing the long chain waxy molecules, if ...

Problems solved by technology

Hydrodewaxing is typically a process for improving the low temperature properties by isomerizing the long chain waxy molecules, if otherwise not removed, may have a negative...

Method used

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  • Method for producing high quality base oils using multiple stage processing
  • Method for producing high quality base oils using multiple stage processing

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example 3

[0080]Example 3 includes stage 1, 2 and 3 followed by product separation systems 4, 5 and 6 as shown in, for example, FIG. 3 simplified process flow scheme. A noble metal hydroisomerization catalyst was installed in the 1st stage reactor. After passing the 1st stage, the effluent was first treated with a base metal catalyst-Ni BASF in the 2nd stage reactor and then sent to the 3rd stage reactor, which was loaded with a Pd / Pt catalyst to further improve the lube product quality. The hydrogen to oil ratio was about 3000 scfb. The lube product was separated from fuels through the distillation section. Product aromatics content was determined.

[0081]FIG. 3 key: 1—1st stage, 2—2nd stage, 3—3rd stage, 4—High pressure seperator, 5—Distillation system, 6—Debutanizer.

[0082]The 1st stage reactor was operated at 600-650° F. to convert the wax molecules to reach the product pour point target. The 3rd stage reactor was operated at ˜450° F. to saturate the single-ring and multi-ring aromatics to i...

example 4

[0083]Example 4 includes stages 1 and 3 followed by product separation systems 4, 5, and 6. This is shown in FIG. 4 simplified process flow scheme. A noble metal hydroisomerization catalyst was installed in the 1st stage reactor. After passing the 1st stage, the effluent was then hydrofinished in the 3rd stage reactor. Comparing to comparative example 2, a layering catalyst system was applied in the 3rd stage reactor for example 4, which includes 10 vol. % base metal catalyst Ni-BASF on top (Zone 1) followed by 90 vol. % noble metal hydrofinishing catalyst (Zone 2). The hydrogen to oil ratio was about 3000 scfb. The lube product was separated from fuels through the distillation section. Product aromatics content was determined.

[0084]FIG. 4 key: 1—1st stage, 3—3rd stage (Base metal zone and noble metal zone), 4—High pressure seperator, 5—Distillation system, 6—Debutanizer.

[0085]The 1st stage reactor was operated at 600-650° F. to convert the wax molecules to reach the product pour po...

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Abstract

Described are processes to produce base oils with one more improved properties, e.g., lower aromatics, economically and/or efficiently. In some embodiments the processes comprise a step that reduces the amount of residual refractory sulfur compounds prior to or simultaneous with a hydrofinishing step which advantageously provides base oils with lower aromatics than comparable processes.

Description

FIELD OF THE INVENTION[0001]The present disclosure relates to methods for producing high quality base oils using, for example, novel methods comprising a step for reducing the amount of residual refractory sulfur compounds prior to or simultaneous with a hydroprocessing step.BACKGROUND AND SUMMARY[0002]Modern refining processes for producing lubricating oils from crudes typically use a number of hydrogen processes. The processes are employed to produce lubricating oils having suitable lubricating properties over a wide range of operating conditions. Hydrotreating / hydrocracking is generally an upgrading process for increasing viscosity index by removing low viscosity index molecules, including molecules containing sulfur and nitrogen. Hydrodewaxing is typically a process for improving the low temperature properties by isomerizing the long chain waxy molecules, if otherwise not removed, may have a negative impact on the pour and cloud points of the fractions. Hydrofinishing typically ...

Claims

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Application Information

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IPC IPC(8): C10G67/04B01J29/74C10G65/04C10G45/62C10G45/64
CPCC10G67/0418B01J29/7461C10G65/043C10G2400/10C10G45/64C10G2300/304C10G2300/1022C10G45/62C10G2300/202C10G45/60B01J29/74C10G45/06C10G45/52B01J23/40B01J23/755
Inventor ZHANG, YIHUALEI, GUAN-DAO
Owner CHEVROU USA INC
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