2223. ------. [METALLGESELLSCHAFT A. G.] Apparatus for Chemical Reactions. French Patent 837,904, Feb. 23, 1939. Chem. Abs., vol. 33, 1939, p. 6093.

Chemical reactions accompanied by liberation or absorption of heat, particularly in the presence of catalysts, are carried out in 1 or more spiroidal reaction chambers of narrow width suitable for the passage of gases or liquids, alternating with a spiroidal chamber or chambers suitable for the passage of a heating or cooling fluid.