Patent ID: 6054630
Filing Date: 2000-04-25
Classification: B01D,B01J,C07C,C10G,Y02P,Y10S

Abstract:
A process for the treatment of a feed comprising a major portion of olefinic hydrocarbons containing 4 carbon atoms per molecule, including isobutene, 1-butene and 2-butenes in a ratio which substantially corresponds to the thermodynamic equilibrium, in which said feed is treated in a distillation zone comprising a stripping zone and a rectification zone associated with at least one hydroisomerisation reaction zone, said hydroisomerisation reaction zone being at least partially internal to said distillation zone and comprising at least one catalytic bed, in which hydroisomerisation of at least a portion of 1-butene is carried out in the presence of a hydroisomerisation catalyst and at least one gas stream comprising hydrogen, such that an effluent rich in isobutene leaves the distillation zone overhead and an effluent rich in 2-butenes leaves the bottom, said process being characterized in that each catalytic bed in the internal portion of the hydroisomerisation zone is traversed by an ascending co-current of said gas stream and liquid and is substantially out of contact with the distillation vapor.