| abstract |
(57) [Summary]nThe present invention is directed to rubidium fluoride impregnated in alumina, cesium fluoride impregnated in alumina and / or fluorine impregnated with glycerol, glycidol, glycerol carbonate or 2,2-dimethyl-1,3-dioxolane-4-methanol. It relates to a method of polymerizing predominantly linear oligomers at 150 ° C. to 350 ° C. in the presence of a catalyst selected from potassium iodide, zirconium oxide, cesium ion exchanged zeolites or rubidium ion exchanged zeolites. The alumina is preferably γ-alumina and the zeolite is preferably Y-zeolite or zeolite β. |