Fermenting liquor containing 2, 3 - butanediol is obtained by Klebsiclla oxytoca fermenting glucose. Commercial MEK is obtained.

• 利用 Klebsiella oxytoca菌发酵葡萄糖制得2,3-丁二醇发酵液,再将经过离心去除菌体的该发酵液进行蒸馏获得商品级甲乙酮,转化率为99%25以上,收率95%25以上。