PATENTS

3143.----- [RUHRCHEMIE, A. G.]  [Process for Working-Up the Residual Catalyst Oils Which Arise in the Polymerization of Olefins to Lubricating Oils by Means of Aluminum Chloride]  German Patent Appl. --, R 683, filed July 21, 1943.  FIAT Reel K-30, frames 7,918-7,920; PB 73,587; TOM Reel 37, bag 3,451, item 36, 3 pp.

In working up the residual catalyst oil occurring in the polymerization of olefins to lubricating oils by heating in the presence of such oils, if necessary after the addition of AlCl₃, the mixture is heated with porous material to temperatures > 200°, preferably up to 220°-240°.  A separate heating lubricating and catalyst oil may be to somewhat lower temperatures, for example, up to 190°, and then to higher temperatures of 220°-240° after addition of the porous material.  The proportional amounts of each substance are suitably 100 parts lubricating oil: 2-3 catalyst oil: 5 porous material.  The addition of 1% CaCO₃ improves the process, as do the higher temperatures as stated.  By this method the catalyst oil occurs in an easily filterable, granular, sandy form easily removable from the apparatus.  An essential improvement in the working of polymerization process is noted.

See also German Co. Office No. r 682 (abs. 3116).