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Poly-alpha-olefin-based oils are reliable technical lubricants of a high wear resistance (up to 8000 h in a broad temperature range from -70 deg C to 290 deg C) and low corrosion activity. A new process for solvent-free catalytic polymerization of alpha-olefins to lubricating oils of low molecular weight (250 to 2000) at 60 deg C to 150 deg C for 30 s to 180 s has been developed at the Institute for Chemical Physics of the Russian Academy of Science, Cernogolovka, RU, and the Petroleum Refinery, Novi Sad, YU, under the pilot plant conditions. A tube-slot plug reactor of high-efficiency (100 t/m3/h) was constructed. Process for recovery and recycling of the spent catalyst was developed. The oils were stabilized by hydrogenation over palladium catalysts at 100 deg C to 200 deg C and 3 MPa and can be used as environmentally friendly products in many technical applications.