Integrated hydroprocessing, steam pyrolysis and catalytic cracking process to produce petrochemicals from crude oil

摘要

An integrated hydrotreating, steam pyrolysis and catalytic cracking process for the production of olefins and aromatic petrochemicals from a crude oil feedstock is provided. Crude oil and hydrogen are charged to a hydroprocessing zone under conditions effective to produce a hydroprocessed effluent, which is thermally cracked in the presence of steam in a steam pyrolysis zone to produce a mixed product stream. Heavy components are catalytically cracked, which are derived from one or more of the hydroprocessed effluent, a heated stream within the steam pyrolysis zone, or the mixed product stream catalytically cracking. Catalytically cracked products are produced, which are combined with the mixed product stream and the combined stream is separated, and olefins and aromatics are recovered as product streams.

主权项

1. An integrated hydroprocessing, steam pyrolysis and catalytic cracking process for production of olefinic and aromatic petrochemicals from a crude oil feed, the process comprising:
a. charging the crude oil and hydrogen to a hydroprocessing zone operating under conditions effective to produce a hydroprocessed effluent having a reduced content of contaminants, an increased paraffinicity, reduced Bureau of Mines Correlation Index, and an increased American Petroleum Institute gravity; b. thermally cracking at least a portion of the hydroprocessed effluent in the presence of steam in a steam pyrolysis zone to produce a mixed product stream; c. catalytically cracking residuals or bottoms derived from a combined product stream, and optionally one or more of the hydroprocessed effluent or a heated stream within the steam pyrolysis zone, to produce catalytically cracked products; d. separating the combined product stream including thermally cracked products and catalytically cracked products; e. purifying hydrogen recovered in step (d) and recycling it to step (a); f. recovering olefins and aromatics from the separated combined product stream; and g. recovering pyrolysis fuel oil from the separated combined product stream for use as at least a portion of the residuals or bottoms cracked in step (c).