PATENTS

3116.----- [RUHRCHEMIE, A. G.]  [Process for Polymerizing Olefins by Means of Metal Halogenides.]   German Patent Appl. --, R 682, filed July 19, 1943.  FIAT Reel K-30, frames 7,921-7,924; PB 73,587; TOM Reel 37, bag 3,451, item 36, 4 pp.

In carrying out the polymerization of olefinic hydrocarbons with metal halogenides, the olefins are gradually, that is, in the course of 1 or more hours, introduced into a previously prepared heated catalyst oil whose activity is maintained by the addition of metal halogenides such as AlCl₃.  After the hydrocarbons are added the heating is continued.  Suitable olefinic hydrocarbons are those produced in the hydrogenation of CO under conditions favoring their maximum production.  Catalyst oil is defined as the double compound formed during previous reactions between metal halogenides and hydrocarbons, so much being drawn off after each reaction that the amount calculated on the respective addition remains constant.  To produce very low viscosity oils at high reaction temperatures, small amounts of AlCl₃ and proportionally larger amounts of catalyst oil are used.