Single distillation column structures with partitions and multiple reboilers and condensers are suggested for the separation of a multicomponent feed. The total number of reboilers and condensers required for such structures is generally equal to the number of components in the feed. In this case, each partitioned distillation zone recovers one of the components and has either a reboiler or a condenser. This enables control of the liquid and vapor flow-rate ratios in each partitioned distillation zone, resulting in better control of product purities. These structures have heat duties and thermodynamic efficiencies similar to those for the known side-stripper and side-rectifier configurations.