Abstract: Pressure swing adsorption with increased recovery of a highly adsorbable product gas component is carried out with a cycling in which, during the flushing phase, and at least over the latter portion thereof, the flushing gas has a concentration in the product gas component which is substantially equal to that of the product gas. To further increase the yield and the concentration of the product gas component in the product gas, the pressure in the absorber is reduced over a time period between the termination of the adsorption phase and the beginning of the desorption phase, with the effluent gas during this reduction in pressure being reused in the pressure swing adsorption cycle.

Abstract: A simple, inexpensive method of inerting transport containers, particularly for goods which easily spoil in the air, such as foodstuffs, plants and flowers, by a gas which contains nitrogen and a predetermined concentration of up to about 5 vol.

Abstract: A gas mixture containing significant proportions of nitrogen and oxygen, such as atmospheric air, is alternately passed through two adsorbers containing a carbonaceous molecular sieve such as comminuted coke. With one-minute half-cycles, each half-cycle encompasses a production phase of 55 seconds during which the gas mixture is driven under high pressure through one adsorber with recovery of high-purity nitrogen therefrom while the other adsorber is being exhausted or vented in a regeneration phase. During a small fraction of the remaining 5 seconds of this half-cycle, preferably lasting between 0.3 and 0.7 second, the two adsorbers are interconnected for a partial equalization of their pressures. In the final period of slightly more than 4 seconds, the regeneration phase of the first adsorber begins while the second adsorber is pressurized with fresh gas mixture, its outlet being closed at that time.

Abstract: A method is disclosed for the adsorptive removal of H.sub.2 S from gas mixtures in C-containing adsorption agents with 1-80 bar pressures and regeneration, employing pressure lowering and/or temperature change and simultaneous rinsing with an at most negligibly absorbable component of the gas mixture. A carbon molecular sieve of fossil and/or bituminous fuel is used, with for pore diameter less than 10 nm a pore volume of 15-25 cm.sup.3 /100 g, and micropore volume in pore diameter range 0.35-10 nm less than 10 cm.sup.3 /100 g. The inner surface of the molecular screen can be freed of surface groups capable of reacting with the H.sub.2 S by aftertreatment with reducing gas.