| abstract |
The invention relates to a process for the preparation of aromatic polyethers by condensation of the reactants in the presence of a condensation aid consisting of a mixture of metal carbonates of (a) lithium and / or alkaline earth metal carbonate and (b) sodium, potassium, rubidium and / or cesium carbonate .n n n The combination of carbonates (a) and (b) according to the invention leads to a surprising increase in activity. |