Abstract: A process for separation of particularly propane, methane or ethane from natural gas includes providing a distillation tower arrangement for separating the heavier components discharged at the bottom from lighter gas discharged at the top with at least two separate towers at different pressures such that the heavier product from the higher pressure tower is expanded and fed to the lower pressure tower. A feed gas containing the components under a first pressure is separated into a first proportion and a second proportion, where neither proportion is zero. The first proportion is fed to the tower.