DEPOLYMERISATION TO OBTAIN CYCLICAL ETHERS BY MEANS OF CATALYSIS BY SELECTED METALLIC COMPOUNDS.

A polyether, in particular a polytetrahydrofuran, is depolymerized to form, in particular, a monomeric tetrahydrofuran, by contacting the polymer with a selected metal compound at a temperature of from 100 DEG C to 250 DEG C.