Prerefining Process for the Hydrodesulfurization of Heavy Sour Crude Oils to Produce Sweeter Lighter Crudes Using Moving Catalyst System

a technology of moving catalyst and heavy sour crude oil, which is applied in the petroleum industry, hydrotreatment process, hydrocarbon oil cracking, etc., can solve the problems of affecting the activity of hydro-desulfurization catalyst, and high concentration of coke precursors

Inactive Publication Date: 2010-01-28
SAUDI ARABIAN OIL CO
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Benefits of technology

[0020]In another embodiment of the present invention, the third effluent is characterized as having a sulfur content of between about 0.1 and 1.0 weight percent. Additionally, the process can further include separating the whole crude oil feedstock into two fractions prior to introducing the heated-pressurized mixture into the HDM reaction zone. In this emb

Problems solved by technology

One of the major technical challenges posed when hydrotreating heavy oil fractions or whole crude is the effect of minor concentrations of contaminants such as organic nickel and vanadium compounds.
These organometallic components have been proven to detrimentally impact the activity of hydrotreating catalysts.
Another major challenge faced by processing whole crude oil is that the concentration of coke precursors can be very high.
These coke precursors, such as asphaltenic plates detrimentally impact the activity of the hydro-desulfurization (HDS) catalysts in question.
This means that the performance of a conventional process would dec

Method used

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  • Prerefining Process for the Hydrodesulfurization of Heavy Sour Crude Oils to Produce Sweeter Lighter Crudes Using Moving Catalyst System
  • Prerefining Process for the Hydrodesulfurization of Heavy Sour Crude Oils to Produce Sweeter Lighter Crudes Using Moving Catalyst System
  • Prerefining Process for the Hydrodesulfurization of Heavy Sour Crude Oils to Produce Sweeter Lighter Crudes Using Moving Catalyst System

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Production of Low Sulfur Crude Oil

[0036]An Arab Heavy Feedstock having properties as shown in Table I below was processed in accordance with an embodiment of the present invention.

TABLE IProperties of Arab Heavy FeedstockCrude OriginUnitsArabian Heavy ExportDensity at 15° C.g / ml0.89API Gravity°27CCRwt %8.2Vanadiumwtppm56.4Nickelwtppm16.4Sulphurwt %2.83NaCl contentwtppmCwt %84.9Hwt %11.89

[0037]The specific conditions include the following: total hydrogen pressure of the reactor system is maintained at 100 bar; hydrogen to hydrocarbon ratio is maintained at 800 normal liters of hydrogen per liter of Arab Heavy Feedstock; temperature of the catalyst system was operated at between 370° C. and 380° C.; and the liquid hourly space velocity for the combined four reactors was 0.5 per hour. The Catalyst Replacement Rate for the first catalyst was maintained within the range of 0.05 to 0.5 weight percent of the total catalyst inventory per day. The Catalyst Replacement Rate for the third cata...

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Abstract

A pre-refining catalytic hydrotreating process for the desulfurization, demetallization, and upgrading of heavy, sour crude oils operating at a moderate temperature and pressure through the utilization of moving catalyst bed technology.

Description

RELATED APPLICATIONS[0001]This patent application claims priority to U.S. Provisional Patent Application Ser. No. 61 / 080,452 filed on Jul. 14, 2008, which is incorporated by reference in its entirety.TECHNICAL FIELD OF THE INVENTION[0002]The present invention relates to a pre-refining process for the upgrading of heavy sour crude oils using a catalytic hydrotreating process employing Hydrodemetallization (HDM), Hydrodesulfurization (HDS), and Hydroconversion (HDC), to produce sweeter, lighter crudes using a series of moving catalyst beds in discrete reactors.BACKGROUND OF THE INVENTION[0003]The removal of sulfur compounds from crude oil and its fractions has been of significant importance for several decades, but has become even more important in recent years due to tightening environmental legislation. While much of the prior art focuses on the desulfurization of individual crude oil fractions, a large segment of the art today and in the past has addressed the requirement for hydro...

Claims

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Application Information

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IPC IPC(8): C10G45/00
CPCC10G45/18C10G65/12C10G47/28
Inventor KRESSMANN, STEPHANE CYRILLESHAFI, RAHEELALZAID, ALI HUSSAINHAMAD, ESAM Z.
Owner SAUDI ARABIAN OIL CO
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