Method And System For Producing Ethylene And Acetic Acid And Method And System For Producing A Target Compound Using Ethylene And Acetic Acid

Abstract: The present invention relates to a method (100) for producing ethylene and acetic acid in which ethane and oxygen are subjected in a feed mixture (1) to an oxidative catalytic dehydration (110) so as to obtain a product mixture (2) containing ethylene acetic acid and further components. The feed mixture (1) has an ethylene content of 0.25 to 30 mol.%. At least a part of the ethylene content of the feed mixture (1) of the oxidative catalytic dehydration is formed by ethylene which is contained in the product flow (2) and is fed back into the oxidative catalytic dehydration (110). The product mixture (2) or part thereof is subjected to a primary treatment (120 170) from which a subsequent mixture (5) is removed and is depleted in carbon dioxide and water compared to the product mixture (2). The subsequent mixture (5) or part thereof is fed as cryogenic separation feed to a cryogenic separation (180 190) which includes a demethanisation (180) and an ethane ethylene separation (190). At least a part of the cryogenic separation feed is fed as a demethanisation feed to the demethanisation (180) and a heavy fraction (6) and a light fraction (7) are formed as head fraction in the demethanisation (180) the heavy fraction (6) or part thereof being fed to the ethane ethylene separation (190) and the light fraction (7) or part thereof being fed back to the oxidative dehydration (110). The present invention also relates to a system for producing ethylene and acetic acid and to a method and a system for producing a target compound using ethylene and acetic acid.

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