About 85 % water in the products must be evaporated using massive energy which brought about the disadvantages such as long process flows large equipments and enormous waster of energy and affected the cost of production of EG seriously .

由于该工艺需要大量的能量用于蒸发产品中85%（ wt）以上的水份，造成 实际生产中流程长、设备大、 能耗高等缺点，直接影响了乙二醇的生产成本；