PATENTS

3123.----- [RUHRCHEMIE, A. G.]  [Process for Producing Benzinelike Hydrocarbons by the Catalytic Polymerization of Olefins.]  German Patent Appl. R 102,113, R 387, filed Apr. 16, 1938 (Cl. IV d-12 o).  TOM Reel 37, bag 3,451, item 35, 2 pp.; TOM Reel 177, frames 1,549-1,551; Meyer Transl. PC-S-II, Fischer-Tropsch, vol. 1, chap. 20, 1948, p. 52.

In the polymerization of olefins to gasoline under the use of pressure and catalysts, undesirable increases in temperature and the resulting formation of heavy polymers are avoided by diminishing the flow  velocity of the hydrocarbons under conversion and promoting the progressive polymerization of the olefins from bottom to top of the reaction space by progressively enlarging the cross section  of the stream flow in the same direction.  Diagram.