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前言: 汞阴极电解食盐制造烧碱和氯气的工业生产中,盐水内微量的Cr、Mo、V都能引起氯气中氢含量的增高,甚至造成爆炸事故。据盐锅峡化工厂报导[1],爆炸时每升盐水中Cr、Mo、V的含量最高的也仅数十微克。为了安全生产,增加产量,必须严格控制盐水中这三个元素的含量。在盐水封闭循环的新工艺中,Cr、Mo、V的含量有随盐水循环使用而增高的可能。因此,测定盐水内Cr、Mo、V的含量更是生产中不可忽视的分析工作。目前,国内有关这项分析工作仅在锅峡化工厂的报告中提到过,采用的是化学分析
Preface: In the industrial production of caustic soda and chlorine gas by using mercury cathodic electrolysis salt, traces of Cr, Mo and V in brine can cause the increase of hydrogen content in chlorine gas and even lead to an explosion accident. According to Salt Lake Gorge chemical plant reported [1], the explosion of brine per liter of Cr, Mo, V highest content of only tens of micrograms. In order to safe production, increase production, we must strictly control the salt content of these three elements. In the new process of salt water closed circulation, the content of Cr, Mo, V may increase with the recycling of salt water. Therefore, the determination of brine Cr, Mo, V content is the production can not be ignored in the analysis. At present, the domestic analysis of this work is only mentioned in the report of the pot Gap plant, the use of chemical analysis