| abstract |
In the preparation of hexadiin (2,4) diol-1,6 by oxidative coupling of propargyl alcohol, a crystal slurry of hexadiin (2,4) diol-1,6 containing catalyst salt is obtained, the work-up of which is very complex.n n n The addition of butanol can prevent the formation of this crystal paste of hexadiin (2,4) diol-1,6. The hexadiene (2,4) diol-1,6 is completely dissolved in the butanol. The salt components still dissolved in the butanolic solution are separated electrodialytically. The separated salt-containing stream contains, in addition to the catalyst salts, water and butanol, which corresponds to the reaction mixture and is returned to the reactor. |