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

摘要

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 heavy components; charging the light components and hydrogen 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; 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 heavy components from step (a) as a fuel oil blend.

主权项

1. An integrated hydrotreating and steam pyrolysis process
for the direct processing of a crude oil to produce olefinic and aromatic petrochemicals, the process comprising: a. separating the crude oil into light components and heavy components; b. charging the light components and hydrogen to a hydroprocessing zone operating under conditions effective to produce a hydroprocessed effluent; c. thermally cracking hydroprocessed effluent in the presence of steam in a steam pyrolysis zone to produce a mixed product stream, wherein the hydroprocessed effluent is heated in a convection section of the steam pyrolysis zone; the heated hydroprocessed effluent is separated into a vapor phase and a liquid phase with a vapor-liquid separation device that includes a pre-rotational element having an entry portion and a transition portion, the entry portion having an inlet for receiving a flowing fluid mixture and a curvilinear conduit; a controlled cyclonic section having an inlet adjoined to the pre-rotational element through convergence of the curvilinear conduit and the cyclonic section and a riser section at an upper end of the cyclonic member through which the vapor phase passes, and a liquid collector/settling section through which the liquid passes; the vapor phase is passed to a pyrolysis section of the steam pyrolysis zone; and the liquid phase is discharged to produce a mixed product stream; d. separating the thermally cracked mixed product stream; e. purifying hydrogen recovered in step (d) and recycling it to step (b); f. recovering olefins and aromatics from the separated mixed product stream; and g. recovering pyrolysis fuel oil from the separated mixed product.