超净高纯硝酸纯化技术的研究进展

The progress of purification technology for ultra-clean and high-purity nitric acid

摘要:

对近年来国内外超净高纯硝酸纯化技术的研究进展进行了综述，对比了普通蒸馏、精馏、减压蒸馏、亚沸蒸馏、膜分离等方法在超净高纯硝酸纯化中的优缺点，指出现阶段我国超净高纯硝酸制备技术需要克服能耗大、产品质量不稳定的缺点。阐明多种技术的集成及膜分离技术的运用，将是硝酸提纯技术的发展方向。

Abstract:

In this paper ,the progress of purification technology for ultra-clean and high-purity nitric acid o-ver past few years was reviewed .The advantages and disadvantages with respect to different purification methods ,such as simple distillation , rectification ,vacuum distillation ,sub-boiling distillation and mem-brane separation ,were compared during the purification of ultra-clean and high-purity nitric acid .At pres-ent ,w t have to overcome the difficulty that emerged in the preparation technology of ultra-clean and high-purity nitric acid in china ,such as great energy consumption and unstable product quality .It was pointed out that the integration of different technology and membrane separation technology will be the trend for nitric acid purification .