| 摘要 |
<p>When 2,4-hexadiyne-1,6-diol is prepared by oxidative coupling of propargyl alcohol, a crystalline paste of 2,4-hexadiyne-1,6-diol containing catalyst salt is formed, the work-up of which is very complicated. …<??>The formation of this crystalline paste of 2,4-hexadiyne-1,6-diol can be prevented by addition of butanol. The 2,4-hexadiyne-1,6-diol is completely dissolved in the butanol. The amounts of salt additionally dissolved in the butanolic solution are separated off by electrodialysis. Apart from the catalyst salts, the salt-containing stream which has been separated off additionally contains water and butanol, which corresponds to the reaction mixture and is recycled into the reactor.</p> |
