Process for the preparation of hexadiin(2,4)-diol-1,6

In the preparation of hexadiine (2,4) -diol-1,6 by oxidative coupling of propargyl alcohol falls a catalyst salt-containing crystal slurry of hexadiine (2,4) -diol-1,6, the work-up is very expensive. The addition of butanol can prevent the formation of this Kristallbreies of hexadiyn (2,4) -diol-1,6. The hexadiyn (2,4) -diol-1,6 is completely dissolved in the butanol. The salt fractions still dissolved in the butanolic solution are separated by electrodialysis. The separated salt-containing stream contains, in addition to the catalyst salts, water and butanol, which corresponds to the reaction mixture and is recycled to the reactor.