提高精馏前合成丙酮氰醇质量的探讨

Discussion on the Quality Development of synthesised Acetone Cyanohydrin before the Rectification

实验表明氢氰酸同丙酮反应中,pH值控制在7.7～7.8时,反应可顺利进行。反应结束后-15℃～-17℃下冷冻2小时,迅速加酸将pH值调到3左右,同时用30℃压缩空气吹拂30分钟,便可得到纯度94%以上的丙酮氰醇。

The experiment shows that the reaction of oxyhydrogen acid and acetone cyanohydric would be done smoothly at pH7.7～7.8. After the reaction, the solution should be frozen for 2 hours at-15℃～17℃,and its pH value should be droped to about 3 by adding some acid while 94% acetone cyanohydrin could reached by blowing the pressured air for half an hour at 30℃.