Hans Wimber, Wilhelm Rohde, Jorg Reyhing: Regeneration of adsorbents. Linde Aktiengesellschaft, Millen & White, June 21, 1977: US04030896 (28 worldwide citation)

In an adsorption process for the separation of gases, e.g., in the separation of CO.sub.2 and H.sub.2 O from air, wherein gas to be separated is passed through one of several interchangeably connected adsorbers, and a main stream of regenerating gas is passed in two periods through another of said i ...