湿法磷酸净化脱砷的研究现状

随着食品、医药及电子行业的不断发展，磷酸及磷酸盐的市场需求量不断增大，并且对磷酸的品质要求也越来越高，尤其是对湿法磷酸中砷杂质的要求，湿法磷酸中砷的含量将直接影响其在磷精细化工领域的应用，因此湿法磷酸中砷的高效、安全去除是亟待解决的一大难题。本文主要对湿法净化磷酸脱砷技术的研究情况进行综述，比较了几种湿法净化磷酸脱砷工艺的优缺点，介绍了较常见的化学沉淀法、结晶法，以及新兴的电沉积法、垂直区域熔融法和微反应器脱砷工艺的应用前景，并指出这些新兴的脱砷工艺将成为今后湿法磷酸的净化脱砷的发展方向，如能解决将这些脱砷工艺在实际中的问题，将会对磷酸工业的发展提供一个更有力的支持。

Research status of removal of arsenic by wet process phosphoric acid

With the continuous development of the food, pharmaceutical and electronics industries, the market demand for phosphoric acid and phosphate is increasing, and the quality requirements for phosphoric acid are also increasing, Especially the requirements for arsenic impurities in wet process phosphoric acid, the content of arsenic in wet process phosphoric acid will directly affect its application in the field of phosphorus fine chemicals. Therefore, the efficient and safe removal of arsenic in wet-process phosphoric acid is a major problem to be solved urgently. The article mainly reviews the research progress of wet purification of phosphoric acid and arsenic removal technology, compares the advantages and disadvantages of several wet purification of phosphoric acid and arsenic removal technology, introduces the application prospects of common chemical precipitation methods, crystallization methods, and emerging electrodeposition methods, vertical zone melting methods, and arsenic removal in microreactor processes. And pointed out that these emerging arsenic removal processes will become the future development direction of purification and arsenic removal of wet-process phosphoric acid. If the practical problems of these arsenic removal processes can be solved, this will provide a stronger support for the development of the phosphoric acid industry.