(一)天津财经学院周振华同志对本报1954年8月号400页宫咏春氨氧化法制硝酸实验的改进:可以用铁丝来替代铂丝,因为通过电流后金属丝本身就在高热下和氧作用成氧化铁,另外我们为了尽可能达到用铂丝做触媒的效果,更加上了细的铜丝网来做第二触媒,效果还好,在仪器方面,全部简化装置如下图。 (A) of Tianjin University of Finance and Economics Comrade Zhou Zhenhua on August 1954, No. 400 Gong Yongchun ammonia oxidation nitric acid experiments to improve: You can use wire instead of platinum wire, because the current through the wire itself in high heat and oxygen The role of iron oxide, the other we in order to achieve as much as possible with platinum catalyst effect, more on the fine copper mesh to do the second catalyst, the effect is good, in terms of equipment, all simplified device as shown below.