Integrated hydrotreating and steam pyrolysis process for direct processing of a crude oil

a technology of hydrotreating and steam pyrolysis, which is applied in the direction of hydrocarbon oil treatment products, liquid degasification, separation processes, etc., can solve the problems of inability to meet the needs of crude oil processing, etc., to achieve the effect of reducing the correlation index of the bureau of mines, reducing the content of contaminants, and increasing paraffinity

Inactive Publication Date: 2013-08-01
SAUDI ARABIAN OIL CO
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Benefits of technology

[0016]An integrated hydrotreating and steam pyrolysis process for the direct processing of a crude oil is provided to produce olefinic and aromatic petrochemicals. Crude oil and hydrogen are charged to a hydroprocessing zone operating under conditions effective to produce a hydroprocessed effluent reduced having a reduced content of contaminants, an increased paraffinicity, reduced Bureau of Mines Correlation Index, and an increased American Petroleum Institute gravity. Hydroprocessed effluent is thermally cracked in the presence of steam to produc...

Problems solved by technology

The availability of these feedstocks is usually limited and requires costly and energy-intensive process steps in a crude oil refinery.
A major drawback in conventional heavy hydrocarbon pyrolysis operations is coke formation.
In a comparative example without the addition o...

Method used

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  • Integrated hydrotreating and steam pyrolysis process for direct processing of a crude oil
  • Integrated hydrotreating and steam pyrolysis process for direct processing of a crude oil
  • Integrated hydrotreating and steam pyrolysis process for direct processing of a crude oil

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Embodiment Construction

[0022]A process flow diagram including an integrated hydroprocessing and steam pyrolysis process and system is shown in FIG. 1. The integrated system generally includes a selective catalytic hydroprocessing zone, an optional separation zone 20, a steam pyrolysis zone 30 and a product separation zone.

[0023]Selective hydroprocessing zone includes a hydroprocessing reaction zone 4 having an inlet for receiving a mixture of crude oil feed 1 and hydrogen 2 recycled from the steam pyrolysis product stream, and make-up hydrogen as necessary. Hydroprocessing reaction zone 4 further includes an outlet for discharging a hydroprocessed effluent 5.

[0024]Reactor effluents 5 from the hydroprocessing reactor(s) are cooled in a heat exchanger (not shown) and sent to a high pressure separator 6. The separator tops 7 are cleaned in an amine unit 12 and a resulting hydrogen rich gas stream 13 is passed to a recycling compressor 14 to be used as a recycle gas 15 in the hydroprocessing reactor. A bottom...

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Abstract

An integrated hydrotreating and steam pyrolysis process for the direct processing of a crude oil is provided to produce olefinic and aromatic petrochemicals. Crude oil and hydrogen are charged to a hydroprocessing zone operating under conditions effective to produce a hydroprocessed effluent reduced having a reduced content of contaminants, an increased paraffinicity, reduced Bureau of Mines Correlation Index, and an increased American Petroleum Institute gravity. Hydroprocessed effluent is thermally cracked in the presence of steam to produce a mixed product stream, which is separated. Hydrogen from the mixed product stream is purified and recycled to the hydroprocessing zone, and olefins and aromatics are recovered from the separated mixed product stream.

Description

RELATED APPLICATIONS[0001]This application claims the benefit of U.S. Provisional Patent Application No. 61 / 591,811 filed Jan. 27, 2012, the disclosure of which is hereby incorporated by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to an integrated hydrotreating and steam pyrolysis process for direct processing of a crude oil to produce petrochemicals such as olefins and aromatics.[0004]2. Description of Related Art[0005]The lower olefins (i.e., ethylene, propylene, butylene and butadiene) and aromatics (i.e., benzene, toluene and xylene) are basic intermediates which are widely used in the petrochemical and chemical industries. Thermal cracking, or steam pyrolysis, is a major type of process for forming these materials, typically in the presence of steam, and in the absence of oxygen. Feedstocks for steam pyrolysis can include petroleum gases and distillates such as naphtha, kerosene and gas oil. The availab...

Claims

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Application Information

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IPC IPC(8): C10G69/06
CPCB01D53/526Y02C20/20B01D2257/7025B01D53/22C10G69/06C10G2300/1037B01D19/0057C10G45/44C10G47/22C10G9/16C10G2300/308C10G2300/4075C10G2300/42C10G2400/20C10G2400/30B01D2256/16C10G2300/807
Inventor SHAFI, RAHEELHASSELMEYER, JULIOBOURANE, ABDENNOURABBA, IBRAHIM A.AKHRAS, ABDUL RAHMAN ZAFER
Owner SAUDI ARABIAN OIL CO
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