Hydrocarbon Pyrolysis of Feeds Containing Sulfur

    公开(公告)号:US20230091233A1

    公开(公告)日:2023-03-23

    申请号:US17904682

    申请日:2021-03-09

    Abstract: The present disclosure relates to processes, apparatuses, and systems for the removal of sulfur compounds from a heavy hydrocarbon feed as part of steam cracking processes to produce light olefins. In at least one embodiment, the process includes introducing a hydrocarbon feed having a first sulfur content to a steam cracker to produce a steam cracker effluent having a second sulfur content less than the first sulfur content. The process includes introducing the steam cracker effluent to a fractionation system to produce a light hydrocarbon product stream having a third sulfur content less than the second sulfur content.

    SYSTEMS AND PROCESSES INTEGRATING STEAM CRACKING WITH DUAL CATALYST METATHESIS FOR PRODUCING OLEFINS

    公开(公告)号:US20210301213A1

    公开(公告)日:2021-09-30

    申请号:US16830759

    申请日:2020-03-26

    Abstract: Processes for producing olefins include integration of steam cracking with a dual catalyst metathesis process. The processes include steam cracking a hydrocarbon feed to form a cracking reaction effluent containing butenes, separating the cracking reaction effluent to produce a cracking C4 effluent including normal butenes, isobutene, and 1,3-butadiene, subjecting the cracking C4 effluent to selective hydrogenation to convert 1,3-butadiene in the cracking C4 effluent to normal butenes, removing isobutene from a hydrogenation effluent to produce a metathesis feed containing normal butenes, and contacting the metathesis feed with a metathesis catalyst and a cracking catalyst directly downstream of the metathesis catalyst to produce a metathesis reaction effluent. Contacting with the metathesis catalyst causes metathesis of normal butenes to produce ethylene, propene, and C5+ olefins, and contacting with the cracking catalyst causes C5+ olefins produced through metathesis to undergo cracking reactions to produce additional propene, ethylene, or both.

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