Method And Plant For Producing Olefins

Abstract: The invention relates to a method (100) for producing olefins, wherein a first input stream containing propane and hydrogen is subjected to a propane dehydrogenation process (10), such that a first product stream containing at least propylene, propane, ethane and/or ethylene, methane and hydrogen is obtained, and wherein at least part of the first product stream is subjected to a first separating sequence (11, 12). The first separating sequence (11, 12) comprises a first separating step (11), to which at least part of the first product stream is fed and in which a gas fraction enriched in hydrogen and methane and a liquid fraction depleted of hydrogen and methane are formed, and the first separating sequence (11, 12) comprises a second separating step (12), to which at least part of the liquid fraction is fed and in which the transfer fraction is formed. According to the invention, a second input stream is subjected to a steam cracking process (20), such that a second product stream is obtained, at least part of the second product stream is subjected to a raw gas compression process (21) and thereafter to a second separating sequence (22), a transfer fraction containing at least ethane and/or ethylene is formed in the first separating sequence (12), and at least part of the transfer fraction is transferred into the steam cracking process (20) or into the raw gas compression process (21). The invention also relates to the use of a corresponding plant.

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