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Process for the efficient use of hydrogen in the production of aromatics from heavy aromatic oils

An aromatic compound, hydrogen technology, applied in the direction of organic chemical methods, chemical instruments and methods, hydrocarbon oil treatment products, etc.

Inactive Publication Date: 2011-11-30
UOP LLC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Heat load and compression needs must also be considered

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  • Process for the efficient use of hydrogen in the production of aromatics from heavy aromatic oils
  • Process for the efficient use of hydrogen in the production of aromatics from heavy aromatic oils
  • Process for the efficient use of hydrogen in the production of aromatics from heavy aromatic oils

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Embodiment Construction

[0024] Petroleum refining is complex and requires multiple processing units. Often the product from one unit can be sent to other units for additional processing. To increase operating efficiency, by-product streams from each unit are typically used as feedstock for other units. Embodiments of the invention relate to improving process flow, minimizing capital investment and improving process efficiency in diesel and aromatics production. Embodiments of the invention are particularly directed to the inclusion of C 9 + The petroleum refining section that passes through hydrotreating and hydrocracking units and contains xylenes and other products.

[0025] figure 1 Shown is an embodiment of the invention. A feed 51 rich in heavy oil aromatics is introduced into hydrotreating reactor 1 and then into hydrocracking reactor 2 . High purity hydrogen is introduced into each reactor separately at 52A and 52B. Hydrotreating reactor 1 is a denitrification and desulfurization reacto...

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Abstract

A method for efficient use of hydrogen in aromatics production from heavy aromatic oil. A hydrocarbonaceous stream comprising C9+ hydrocarbons and an essentially pure hydrogen stream are hydrotreated and hydrocracked to produce a hydrocracking zone effluent comprising aromatics. The hydrocracking zone effluent is fractionated to separately recover C4 and lighter hydrocarbons, hydrocarbons boiling between about 180° F. and about 380° F., and diesel. The heavier hydrocarbons are combined with a low purity hydrogen-containing stream and heated, then dehydrogenated or transalkylated to form hydrogen, volatile compounds, and aromatics. The hydrogen and volatile components are separated from the aromatics and treated by pressure swing adsorption to provide an essentially pure hydrogen-containing stream, which is compressed and provided to the hydrotreating and hydrocracking steps. Liquid products are recovered from the aromatics-containing stream.

Description

technical field [0001] The present invention relates to a process for the efficient use of hydrogen in the production of aromatics from heavy aromatic oils. In particular, the present invention relates to a method for the production of hydrogen in petroleum by providing a once-through path for hydrogen by first passing the hydrogen stream through an aromatics reaction zone, followed by purification and compression for use in high pressure hydrotreating and hydrocracking reactors. Methods to balance hydrogen demand in refining. Background technique [0002] In petrochemical refining, streams of various compositions are required as raw materials for processing steps. These processing steps then typically produce by-product streams that can be used in other processing steps. High pressure pure hydrogen streams are required, for example, for high pressure hydrotreating and hydrocracking. However, few such streams are produced as by-products by other processes. Therefore, it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07B31/00C07B35/02
CPCC07C15/04C10G2400/30C10G2300/1044C10G2400/04C10G67/02C07C15/06C10G2300/1096C07C15/08C10G65/12C10G2300/301C07B31/00C07B35/02C07C5/02C10G45/44
Inventor S·J·弗雷V·P·塔卡尔
Owner UOP LLC
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