A process for conversion of crudes and condensates to chemicals utilizing a mix of hydrogen addition and carbon rejection

Abstract

Processes herein may be used to thermally crack various hydrocarbon feeds, and may eliminate the refinery altogether while making the crude to chemicals process very flexible in terms of crude. In embodiments herein, crude is progressively separated into light and heavy fractions utilizing convection heat from heaters used in steam cracking. Depending on the quality of the light and heavy fractions, these are routed to one of three upgrading operations, including a fixed bed hydroconversion unit, a fluidized catalytic conversion unit, or a residue hydrocracking unit that may utilize either an ebullated bed reactor with extrudate catalysts or a slurry hydrocracking reactor using a homogeneous catalyst system, such as a molybdenum based catalysts which may optionally be promoted with nickel. Products from the upgrading operations can be finished olefins and / or aromatics, or, for heavier products from the upgrading operations, may be used as feed to the steam cracker.

Description

Technical field [0001] Embodiments disclosed herein relate generally to thermal cracking of hydrocarbon mixtures (such as whole crude oil or other hydrocarbon mixture) to produce olefins. Background technique [0002] Final boiling above 550 ℃ hydrocarbon mixture to produce olefins usually can not be processed because the reaction will quite quickly coking directly in the pyrolysis reactor. Although the reaction conditions may limit the fouling tends to slow down, but less severe conditions can lead to significant loss of yield. [0003] To date, most of the refining of crude oil has a large - partially converted into chemical petrochemical joint means. The focus is to produce refinery transportation fuels, such as gasoline and diesel. Combined apparatus petrochemical refinery stream from a low value (such as liquefied petroleum gas, LPG and light naphtha) is sent to a refinery or may be adjacent to a non-adjacent. Then, the joint means petrochemicals production of chemicals, suc...

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Problems solved by technology

and figure 2 Compared with ultra-light crude oil and condensate, this scheme allows the processing of slightly heavier crude oil, but has the following disadvantages: (i) front-end hydroprocessing will require many reactor trains and very large quantities of catalyst, and (ii) for heavy The product still needs a reformer

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