Abstract: A self-stripping, recycling adsorbing unit for recovery of hydrocarbons from a mixture of hydrocarbon vapors and air, including two adsorbers filled with adsorbent material, automatically controlled valves which route the mixed vapor flow through one adsorber and connect the other to a stripping apparatus, and instrumentation which automatically determines when the flows through the adsorbers should be interchanged and which activates the automatic valves to accomplish this interchange. The stripping apparatus includes a compressor with suction arranged to alternately evacuate the adsorbers and with its discharge connected to a condenser. Condensed hydrocarbon is sent to storage and uncondensed vapors are recycled through the active adsorber together with mixed air and hydrocarbon vapors entering the system for processing.