蒸馏时冷凝管开始滴下第一滴液体时的温度为初馏温度；蒸馏接近完毕时的温度为末馏温度，两个温度之差为沸程。
最广泛使用的介质可能一般采用瓦斯油沸程内的高沸点石油馏分。
Probably the most widely used medium is a high-boiling petroleum fraction, usually in the gas-oil range.
促进汽油沸程原料烃类分子重排以生成催化重整过程所要求产物所用的催化剂。
Catalyst for promoting rearrangement of hydrocarbon molecules in a gasoline boiling-range feedstock to form desired product in catalytic reforming process.
在奥氏体不锈钢制再沸器的上管板与壳程筒体焊接的管板一侧发生蒸气泄漏。
The steam leakage was occurred on the welding zone of the tube sheet of the austenitic stainless steel heat exchanger.
应用推荐