摘要
为处理次磷酸钠生产过程中产生的磷化氢尾气,利用次氯酸钠氧化性对其进行吸收,将其转化为次磷酸钠,提高磷资源的回收利用率,降低对环境空气的影响。通过实验研究,分析影响其吸收效果的因子,重点研究了有效氯浓度和pH值对吸收效果的影响。实验结果表明:当载气流速为20ml/min,吸收温度为室温(20℃左右)时,以pH=9,浓度分别为0.75%、7%的次氯酸钠溶液作为一、二级吸收管的吸收液,吸收效果较好,次磷酸钠得率较高。
In order to treat the produced phosphine exhaust gas in the sodium hypophosphite industry, the sodium hypochlorite was used to absorb it, and transform it to the sodium hypophosphite for recycling. Through the experi- ments, the influential factors to its absorption effect have been analyzed, mainly the effective chlorine concentration and pH value. The results show that when the speed of carrier gas flow was 20ml/min, the temperature for reaction was about 20~C, the pH value was 9, and the concentration of the sodium hypochlorite solution respectively was 0. 75% and 7% as the first -level, the second -level absorption solution, the absorption effect was relatively bettear
出处
《环境科学导刊》
2013年第5期85-88,共4页
Environmental Science Survey
关键词
磷化氢
次氯酸钠
吸收
次磷酸钠
phosphine
sodium hypochlorite
absorption
sodium hypophosphite
