PATENTS

      1534.  ------.  [I. G. FARBENINDUSTRIE, A. G.]  [Recovery of High-Grade Motor Fuels.]  German Patent Appl. I 74,591. OZ 14,084. filed Mar. 22. 1943 (Cl. 46 a).  FIAT Reel 172. frame 372; PB 25,616.

            Propylene is converted together with CO and H2 at raised pressure and temperature to aldehydes, which are reduced to alcohols and these to n- and I-butylene by splitting off H2O.  The latter are then converted to motor fuels by dimerization, alkylation with isoparaffins, and hydrogenation.  The alcohols higher than n-butyl are subjected to a cracking hydrogenation with a MoS2 catalyst at 400º-450º to produce an antiknock gasoline when mixed with that produced in the 1st step.