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We study the circumstellar evolution of the binary HD101584, consisting of apost-AGB star and a low-mass companion, which is most likely apost-common-envelope-evolution system. We used ALMA observations of the 12CO,13CO, and C18O J=2-1 lines and the 1.3mm continuum to determine the morphology,kinematics, masses, and energetics of the circumstellar environment. Thecircumstellar medium has a bipolar hour-glass structure, seen almost pole-on,formed by an energetic jet, about 150 km/s. We conjecture that thecircumstellar morphology is related to an event that took place about 500 yearago, possibly a capture event where the companion spiraled in towards the AGBstar. However, the kinetic energy of the accelerated gas exceeds the releasedorbital energy, and, taking into account the expected energy transferefficiency of the process, the observed phenomenon does not match currentcommon-envelope scenarios. This suggests that another process must augment, oreven dominate, the ejection process. A significant amount of material residesin an unresolved region, presumably in the equatorial plane of the binarysystem.

ALMA view of the circumstellar environment of the post-common-envelope-evolution binary system HD101584