PATENTS

 3089.----- [RUHRCHEMIE, A. G.]  [Process for Removing Oxygenated Compounds From Hydrocarbon Mixtures.]  German Patent Appl. --, R 690, filed Sept. 9, 1943.  FIAT Reel K-30, frames 7,887-7,890; PB 73,587; TOM Reel 37, bag 3.451, item 36, 4 pp.; Meyer Transl. PC-S-II, Fischer-Tropsch, vol. 5, ch. 147, 1949, p.9.

In removing oxygenated compounds from synthetic and natural hydrocarbon mixtures, the latter are passed over layers of highly porous silica gel and/or Al₂O₃ at normal, super- or sub-pressure and at room temperature.  Before using the adsorbent is dried for a short time at temperatures > 100°, preferably > 150°.  The desorption of the adsorbed fraction is effected by displacement with H₂O, after which it is extracted with organic solvents such as acetone, ether, alcohol paraffin furfurol, and the like and the adsorption agent, after becoming exhausted, is reactivated by acid treatment.