3210..----- [RUHRCHEMIE, A. G.] [Temperature Regulation in the condensation and Polymerization of Unsaturated Hydrocarbon Oils.] German Patent 684,016, Nov. 20, 1939 (Cl. 12 o-1.01). Schmidt, J.; Das Kohlehnoxyd, Akad. Verlagsgesell., Leipzig, 1950, p

PATENTS

3210..----- [RUHRCHEMIE, A. G.] [Temperature Regulation in the condensation and Polymerization of Unsaturated Hydrocarbon Oils.] German Patent 684,016, Nov. 20, 1939 (Cl. 12 o-1.01). Schmidt, J.; Das Kohlehnoxyd, Akad. Verlagsgesell., Leipzig, 1950, p. 185; Chem. Abs., vol. 34, 1940, p. 3488.

Inert vaporizable cooling material, such as liquefied propane, butane, pentane, or mixtures of these hydrocarbon materials, is employed.