Patent ID: 8143468
Filing Date: 2012-03-27
Classification: C07C,Y02P

Abstract:
1. A process for preparing 3-methylbut-1-ene comprising: a) hydroformylating isobutene in the presence of a rhodium catalyst to form an aldehyde, wherein said hydroformylating comprises hydroformylating a hydrocarbon stream II which comprises at least 70% by mass of isobutene in relation to olefins present in the hydrocarbon stream II and which has been obtained from a hydrocarbon stream I comprising isobutene or is identical to the hydrocarbon stream I, b) hydrogenating the aldehyde obtained in step a) to form at least one alcohol, and c) eliminating water from the at least one alcohol obtained in process step b) to form 3-methylbut-1-ene, wherein at least 90% of the isobutene is converted to the aldehyde in step a).