PROCESS FOR THE PREPARATION OF AN AROMATIC POLYETHER IN THE PRESENCE OF FINELY DIVIDED CODENSATION AUXILIARIES

摘要

HOE 89/F 256 of the disclosure Process for the preparation of an aromatic polyether in the presence of finely divided condensation auxiliaries. The process for the preparation of an aromatic polyether by condensation of the reactants in the presence of carbonates of metals of Group I of the Periodic Table, as condensation auxiliaries, employs the metal carbonates sodium carbonate or sodium bicarbonate or mixtures thereof in the form of very finely ground salts. The fine particle size distribution of the carbonate allows a significant shortening of the reaction times and permits polyethers having a defined degree of condensation to be reproducibly prepared.