The method and the condition of separation epoxy ethane from dihydric alcohol are discribed.

介绍了环氧二元醇的分离法和条件。

The Preparation method of cheap aluminium dihydric phosphate and its application in refractories have been intro-duced.

供了廉价磷酸二氢铝的制法，介绍了它在耐火材料中的应用。