Hydrocarbon conversion processes using ionic liquids

a technology of ionic liquid and hydrocarbon conversion process, which is applied in the field of hydrocarbon conversion process using ionic liquid, can solve the problems of high sulfur or nitrogen content of feed stream, affecting product quality specifications, catalyst deactivation, and/or product yield, etc., and achieves the desired product yield.

Inactive Publication Date: 2014-12-04
UOP LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]One aspect of the invention is a method of hydrocarbon conversion. In one embodiment, the method includes contacting a hydrocarbon feed containing a contaminant with a hydrocarbon feed-immiscible ionic liquid to form a mixture comprising decontaminated hydrocarbon feed and hydrocarbon feed-immiscible ionic liquid containing the contaminant. The decontaminated hydrocarbon feed is reacted in a conversion zone to produce a desired product selected from gasoline, diesel, naphtha, distillate, jet, light olefins, or combinations thereof. The conversion of the decontaminated hydrocarbon feed is increased compared to the conversion of the contaminated feed under comparable operating conditions, or the yield of the desired product made from the decontaminated hydrocarbon feed is increased compared to the yield of the desired product made from the contaminated hydrocarbon feed under comparable operating conditions, or both.
[0006]Another aspect of the invention is a method of fluid catalytic cracking. In one embodiment, the method includes contacting a hydrocarbon feed containing a contaminant with a hydrocarbon feed-immiscible ionic liquid to form a mixture comprising decontaminated hydrocarbon feed and feed-immiscible ionic liquid containing the contaminant, wherein the contaminated feed is selected from the group consisting of vacuum gas oil, coker gas oil, light cycle oil, vacuum residue, or combinations thereof, and wherein the hydrocarbon feed-immiscible ionic liquid comprises at least one of an imidazolium ionic liquid, a phosphonium ionic liquid, and a pyridinium ionic liquid. The mixture is separated into a decontaminated hydrocarbon feed stream and a hydrocarbon feed-immiscible ionic liquid stream containing the contaminant. The decontaminated hydrocarbon feed stream is reacted in a catalytic conversion zone in the presence of a catalyst under catalytic conversion conditions to produce gasoline desired product selected from gasoline, diesel, naphtha, distillate, jet, light olefins, or combinations thereof. The conversion of the decontaminated hydrocarbon feed is increased compared to the conversion of the contaminated hydrocarbon feed under comparable operating conditions, or the yield of the desired product made from the decontaminated hydrocarbon feed is increased compared to the yield of the desired product made from the contaminated hydrocarbon feed under comparable operating conditions, or both.

Problems solved by technology

However, hydrocarbon feed streams having higher amounts of contaminants, such as sulfur and nitrogen are more difficult to convert.
For example, the degree of conversion, product yields, catalyst deactivation, and / or ability to meet product quality specifications may be adversely affected by the sulfur or nitrogen content of the feed stream.
While the hydrotreating process increases conversion, the hydrotreating process units are very expensive and require substantial amounts of hydrogen.

Method used

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  • Hydrocarbon conversion processes using ionic liquids
  • Hydrocarbon conversion processes using ionic liquids

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0082]A sample of triisobutylmethylphosphonium tosylate ionic liquid and vacuum gas oil (VGO) containing 1400 ppm of nitrogen were combined in a beaker at a weight ratio of 10:1 hydrocarbon feed: ionic liquid. The beaker was placed onto a heated stir plate and stirred at 80° C. for 30 minutes. After 30 minutes, the stirring was stopped, and the ionic liquid mixture was allowed to settle for 30 minutes. A pipette was used to draw off the extracted hydrocarbon feed from the ionic liquid. The catalyst / oil ratio was adjusted for the ionic liquid treated case to account for the same coke combustion in the regenerator. Analysis showed that 42.3% of the nitrogen was removed from the extracted hydrocarbon feed. This extracted hydrocarbon feed was tested in an FCC pilot plant. The conversion of ionic liquid treated VGO to hydrocarbons boiling below 193° C. (380° F.) increased by 5.0 volume % over that of the untreated hydrocarbon feed. The gasoline yield from ionic liquid treated VGO increas...

example 2

[0083]For comparison purposes a sample made up of 80% untreated VGO was blended with 20% untreated coker gas oil (CGO), the total nitrogen in this blend was 2816 ppm. This blend was tested in an FCC pilot plant. A sample of triisobutylmethylphosphonium tosylate ionic liquid and CGO were combined in a beaker at a weight ratio of 10:1 CGO: ionic liquid. The beaker was placed onto a heated stir plate and stirred at 80° C. for 30 minutes. After 30 minutes, the stirring was stopped, and the ionic liquid mixture was allowed to settle for 30 minutes. A pipette was used to draw off the extracted CGO from the ionic liquid. The catalyst / oil ratio was adjusted for the ionic liquid treated case to account for the same coke combustion in the regenerator. Analysis showed that the extraction removed 34.6% of the nitrogen from the CGO. This extracted CGO was blended with 80% untreated VGO, the total nitrogen in this blend was 2186 ppm. This blend was also tested in an FCC pilot plant. The conversio...

example 3

[0084]A sample of triisobutylmethylphosphonium tosylate ionic liquid and vacuum gas oil (VGO) containing 1386 ppm of nitrogen were combined in two beakers at a weight ratio of 20:1 and 2.5:1 hydrocarbon feed: ionic liquid respectively. The beakers were placed onto a heated stir plate and stirred at 80° C. for 30 minutes. After 30 minutes, the stirring was stopped, and the ionic liquid mixture was allowed to settle for 30 minutes. A pipette was used to draw off the extracted hydrocarbon feed from the ionic liquid. Analysis showed that 33% of the nitrogen was removed from the extracted hydrocarbon feed for 20:1 case and 60% of nitrogen was extracted for 2.5:1 case. This extracted hydrocarbon feed was tested in an FCC pilot plant. The conversion of 20:1 ionic liquid treated VGO to hydrocarbons boiling below 193° C. (380° F.) increased by 4.5 vol % over that of the untreated hydrocarbon feed and the conversion of 2.5:1 ionic liquid treated VGO to hydrocarbons boiling below 193° C. (380°...

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Abstract

A method of hydrocarbon conversion is described. The hydrocarbon feed is decontaminated using an ionic liquid and introduced into a conversion zone. The conversion of the decontaminated feed is increased compared to the conversion of the contaminated feed and the yield of the desired product made from the decontaminated hydrocarbon feed is increased compared to the yield of the desired product made from the contaminated hydrocarbon feed.

Description

BACKGROUND OF THE INVENTION[0001]Vacuum gas oil (VGO) is a hydrocarbon fraction that may be converted into higher value hydrocarbon fractions such as diesel fuel, jet fuel, naphtha, gasoline, and other lower boiling fractions in refining processes such as hydrocracking and fluid catalytic cracking (FCC). However, hydrocarbon feed streams having higher amounts of contaminants, such as sulfur and nitrogen are more difficult to convert. For example, the degree of conversion, product yields, catalyst deactivation, and / or ability to meet product quality specifications may be adversely affected by the sulfur or nitrogen content of the feed stream.[0002]Therefore, various processes have been developed to remove contaminants from hydrocarbon feed. It is known to reduce the sulfur content of VGO by catalytic hydrogenation reactions such as in a hydrotreating process unit. While the hydrotreating process increases conversion, the hydrotreating process units are very expensive and require subs...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10G55/06
CPCC10G55/06C10G21/27C10G21/28C10G2300/202C10G2300/305C10G2300/307C10G2300/308
Inventor GATTUPALLI, RAJESWAR R.MEZZA, BECKAY J.BHATTACHARYYA, ALAKANANDAJAMES, ROBERT B.SANGALLI, MASSIMOVAN OPDORP, PETER
Owner UOP LLC
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