| http://www.w3.org/ns/prov#value | - The present invention is a method for debottlenecking an existing steam cracker unit of which the operation is modified from high severity to low severity operation, having a cracking zone and a fractionation zone, said fractionation zone comprising a gasoline stripper, a de-methaniser (I), a de-ethaniser (I), a de-propaniser (I) and a de-butaniser (I), said de-propaniser (I) receiving product fro
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