次硝酸，分子式为HNO，是氮的一种含氧酸，属于弱酸。
研究了以氯氧化铋精矿为原料，制取次硝酸铋的工艺条件。
Technical conditions for preparing bismuth subnitrate with bismuth oxychloride concentrate as the raw material have been studied.
氯氧化铋经脱氯处理制备硝酸铋、再水解成次硝酸铋、转化成次碳酸铋和煅烧成氧化铋。
Bismuth chloroxide is used to prepare bismuth nitrate by removing chlorine, which transforms bismuth hyponitrate, then bismuth hypocarbonate and finally bismuth oxide by calcinations.
动力学研究表明，在硝酸硫胺沉淀结晶过程中，初级成核是主要的成核方式，当晶浆密度较高且过饱和度很低时，二次成核不能忽视。
Primary nucleation was the main nucleation mode in the precipitation process. However, secondary nucleation cannot be ignored when the slurry density is high, and the supersaturation is low.
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