| abstract |
Glycerol, glycidol, glycerol carbonate or 2,2-dimethyl-1,3-dioxolane-4-methanol is polymerized into preponderantly linear oligomers at 150 °C to 350 °C in the presence of a catalyst, selected from RbF, CsF and/or KF impregnated on alumina, zirconium oxide, and cesium or rubidium ions exchanged zeolite. The alumina is preferably gamma-alumina and the zeolite is preferably a Y-zeolite or a zeolite beta. |