A new type filler, PTFE ladder Rasching ring is designed and used in the washing tower of anhydrous hydrofluoric acid equipment, properties of this filler is also analyzed. 设计了1种新型填料―PTFE阶梯拉西环并应用在无水氢氟酸(HF)装置的洗涤塔中,分析了该填料的特性。
Material illustrating detailed structure of graptolites has been etched from limestone by means of hydrofluoric acid. 表明笔石详细构造的物质是利用氢氟酸(HF)从石灰岩中侵蚀出来。
A colorless poisonous corrosive liquid made by the action of sulphuric acid on calcium fluoride; solutions in water are hydrofluoric acid. 一种无色有毒腐蚀性液体,由硫酸作用于氟化钙而制成,溶于水中形成氢氟酸(HF)。
Applied research of hydrofluoric acid in puring wet-phosphoric acid 氢氟酸(HF)在湿法磷酸净化中的应用研究