Integrated hydrotreating and steam pyrolysis process including residual bypass 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, thermal non-catalytic cracking, organic chemistry, etc., can solve the problems of inability to meet the requirements of the presence of feedstocks that cannot be used in conventional heavy hydrocarbon pyrolysis operations, and the formation of coke in conventional pyrolysis operations. , to achieve the effect of reducing the correlation index o

Inactive Publication Date: 2016-07-21
SAUDI ARABIAN OIL CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach minimizes coke formation, increases ethylene yields, and reduces the Bureau of Mines Correlation Index, enabling more efficient production of petrochemicals with reduced energy consumption and extended catalyst life, thus addressing the limitations of conventional processes.

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 of molten salt, the steam cracking reactor became clogged and inoperable after just 5 hours because of the formation of coke in the reactor.

Method used

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

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Embodiment Construction

[0025]A flow diagram including an integrated hydroprocessing and steam pyrolysis process and system including residual bypass is shown in FIG. 1. The integrated system generally includes a feed separation zone, a selective hydroprocessing zone, a steam pyrolysis zone and a product separation zone.

[0026]Feed separation zone 20 includes an inlet for receiving a feedstock stream 1, an outlet for discharging a rejected portion 22 and an outlet for discharging a remaining hydrocarbon portion 2. The cut point in separation zone 20 can be set so that it is compatible with the residue fuel oil blend, e.g., about 540° C. Separation zone 20 can be a single stage separation device such a flash separator

[0027]In additional embodiments separation zone 20 can include, or consists essentially of (i.e., operate in the absence of a flash zone), a cyclonic phase separation device, or other separation device based on physical or mechanical separation of vapors and liquids. One example of a vapor-liqui...

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Abstract

A process is provided that is directed to a steam pyrolysis zone integrated with a hydroprocessing zone including residual bypass to permit direct processing of crude oil feedstocks to produce petrochemicals including olefins and aromatics. The integrated hydrotreating and steam pyrolysis process for the direct processing of a crude oil to produce olefinic and aromatic petrochemicals comprises separating the crude oil into light components and components boiling in and above the residual oil range; charging the light components and hydrogen to a hydroprocessing zone operating under conditions effective to produce a hydroprocessed effluent; thermally cracking the hydroprocessed effluent in the presence of steam to produce a mixed product stream; separating the mixed product stream; purifying hydrogen recovered from the mixed product stream and recycling it to the hydroprocessing zone; recovering olefins and aromatics from the separated mixed product stream; and recovering a combined stream of pyrolysis fuel oil from the separated mixed product stream and components boiling in and above the residual oil range from step (a) as a fuel oil blend.

Description

RELATED APPLICATIONS[0001]This application is a continuation application of U.S. patent application Ser. No. 13 / 865,060 filed on Apr. 17, 2013, which[0002]claims the benefit of priority under 35 USC §119(e) to U.S. Provisional Patent Application No. 61 / 790,519 filed Mar. 15, 2013, and[0003]is a Continuation-in-Part under 35 USC §365(c) of PCT Patent Application No. PCT / US13 / 23337 filed Jan. 27, 2013, which claims the benefit of priority under 35 USC §119(e) to U.S. Provisional Patent Application No. 61 / 591,816 filed Jan. 27, 2012, all of which are incorporated herein by reference in their entireties.BACKGROUND OF THE INVENTION[0004]1. Field of the Invention[0005]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.[0006]2. Description of Related Art[0007]The lower olefins (i.e., ethylene, propylene, butylene and butadiene) and aromatics (i.e., benzene, tol...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): C10G69/06
CPCC10G69/06C10G9/36C10G45/00C10G2300/201C10G2300/308C10G2300/4081C10G2400/20C10G2400/30
InventorSHAFI, RAHEELBOURANE, ABDENNOURSAYED, ESSAMABBA, IBRAHIM A.AKHRAS, ABDUL RAHMAN ZAFER
OwnerSAUDI ARABIAN OIL CO