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Combined solid adsorption-hydrotreating process for whole crude oil desulfurization

a technology of desulfurization and solid adsorption, which is applied in the petroleum industry, hydrotreatment process, hydrocarbon oil treatment, etc., can solve the problems of reducing the requisite throughput of the hydroprocessing unit, high process cost, etc., and achieves the reduction of the requisite throughput, high level of organosulfur compounds, and convenient separation and recovery

Inactive Publication Date: 2018-02-01
SAUDI ARABIAN OIL CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is about a system and process for whole crude oil desulfurization that reduces the need for a hydroprocessing unit, which is expensive and energy-intensive. The system includes an adsorption zone and a hydroprocessing zone. The crude oil feedstock is first treated in the adsorption zone, resulting in a stream containing high levels of organosulfur compounds and a solvent. The solvent is then separated and recovered, reducing the volume of liquid feed to be desulfurized in the hydroprocessing zone. This reduces the cost of operating the hydroprocessing unit and allows for the use of technologically mature units with desirable cost savings.

Problems solved by technology

This combined process and system reduces the requisite throughput for the hydroprocessing unit, conventionally a very costly process to operate both in terms of energy expenditures and catalyst depletion.

Method used

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  • Combined solid adsorption-hydrotreating process for whole crude oil desulfurization
  • Combined solid adsorption-hydrotreating process for whole crude oil desulfurization
  • Combined solid adsorption-hydrotreating process for whole crude oil desulfurization

Examples

Experimental program
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Effect test

example 1

[0059]In this example, 3 grams of type Y zeolite powder was activated in a vacuum oven at 175° C. and a gauge pressure of 14 psig overnight. The Y zeolite powder was then cooled to room temperature and placed in a 100 ml wide-mouth bottle, to which 15 grams of crude oil having a total sulfur content of 3.01 wt % was added. The mixture was mechanically shaken for 8 hours to reach adsorption equilibrium. After the shaking was stopped, the zeolite powder was allowed to settle by gravity and the upper liquid layer was analyzed for total remaining sulfur which was found to be 1.4 wt %. The liquid was then decanted from the bottle and the remaining solid was washed with 30 grams of toluene. Analysis by X-ray fluoresce indicates that the toluene removed 67% of the total sulfur from the adsorbent.

example 2

[0060]Example 1 was repeated, except that Ni—Y zeolite powder (prepared by ion exchange) was employed as the adsorbent. The remaining total sulfur in the liquid was 1.2 wt % and toluene removed 54 wt % of the total sulfur from the adsorbent.

example 3

[0061]Example 1 was repeated, except that 1-Y zeolite pellets were employed as the adsorbent. The remaining total sulfur in the liquid was 2.87 wt % and toluene removed almost 100 wt % of the total sulfur from the adsorbent.

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Abstract

A whole crude oil desulfurization system and process includes a combination of an adsorption zone and a hydroprocessing zone. This combined process and system reduces the requisite throughput for the hydroprocessing unit, conventionally a very costly and process both in terms of energy expenditures and catalyst depletion. By first contacting the whole crude oil feedstock with an adsorbent for the sulfur-containing compounds, the adsorption effluent having a relatively lower sulfur content can be collected and provided to refiners without further treatment. The adsorbates, including adsorbed organosulfur compounds, are solvent desorbed resulting in a stream containing high levels of organosulfur compounds and a solvent. Following recovery of the solvent, the volume of the sulfur-containing feedstream that remains to be desulfurized in the hydroprocessing zone is substantially less than the original amount of whole crude oil feedstock.

Description

RELATED APPLICATIONS[0001]This application is a continuation application of U.S. patent application Ser. No. 13 / 090,584 filed on Apr. 20, 2011, which is related to and claims the benefit of U.S. Provisional Patent Application Ser. No. 61 / 325,898 filed on Apr. 20, 2010, which are incorporated by reference herein in their entireties.BACKGROUND OF THE INVENTIONField of the Invention[0002]This invention relates to improvements in whole crude oil processing, and in particular to an improved method for the desulfurization of whole crude oil.Description of Related Art[0003]Natural petroleum and crude oil deposits are found worldwide over land and sea, having been created based on significantly different ecological and geological conditions since the time before fossil records on Earth. It follows that the compositions and constituents of extracted crude oil is different, and in some cases vastly different. However, virtually all crude oils contain some level of sulfur compounds, including ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10G25/12C10G67/06C10G25/00C10G25/05
CPCC10G2300/4093C10G2300/44C10G2300/207C10G2300/1033C10G25/003C10G67/06C10G25/12C10G25/05C10G2300/202
Inventor HAMAD, ESAM ZAKIWANG, YUGUO X.
Owner SAUDI ARABIAN OIL CO
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