This method was uneconomic for it was impossible to recover the spent acid.
由于不能回收废酸，所以这个方法是不经济的。
Spent acid after cleaning plated parts is great in quantity and can not be treated desirably in plating factories.
清洗镀件后的废酸在电镀厂中数量巨大，但又没有良好的方法加以处理。
The method of utilization of industrial spent acid and rejected copper and Zinc oxide ore is concerned in this paper.
本文涉及工业废酸资源化和废弃的氧化铜锌矿资源综合利用的方法。
Any hydrocarbon present in the H2S gas has the same effect on the system as hydrocarbon in the spent acid feed stream.
H2S气体中的任何碳氢化合物与废酸原料流中的碳氢化合物一样，对该体系的作用是相同的。
We've spent years listening to greens complaining about the loss of the rainforests, acid rain, and extinctions of mammals, birds and plants.
我们历经多年听着环保主义者们抱怨雨林的丢失、酸雨的出现，以及哺乳动物、鸟类与植物的灭绝。
The characteristics of Zn of spent alkaline Zn-Mn batteries and its suitable conditions dissolved in nitric acid were studied.
研究了废旧碱性锌锰电池的成分和其中的锌在硝酸中的适宜浸取条件。
Sodium chloride and hydrochloric acid are often used to regenerate spent ion exchange resins used in water purification.
氯化钠和盐酸常用来再生水净化中用的废的离子交换树脂。
A new process involving ultrasonic separation of electrode materials, acid dissolution, precipitation of cobalt and lithium has been applied to recover metals values from spent lithium-ion batteries.
采用超声波分离电极材料-酸浸-钴锂沉淀新工艺分离并回收了废旧锂离子电池中的有价金属。
The bottom plates in the liquid section have suffered from severe corrosion caused by the precipitation of sulfuric acid carried by neutral oil in spent caustic.
液相部位的罐底板，由于碱渣中性油带有的硫酸沉积，造成底板局部位置腐蚀严重。
The bottom plates in the liquid section have suffered from severe corrosion caused by the precipitation of sulfuric acid carried by neutral oil in spent caustic.
液相部位的罐底板，由于碱渣中性油带有的硫酸沉积，造成底板局部位置腐蚀严重。
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