柠檬酸镧的低热固相合成研究

Study on Solid-state Synthesis of Lanthanum Citrate

将乙酸镧和柠檬酸按化学计量比1:1在常温下进行固相反应,研磨75min,合成出柠檬酸镧,并用红外光谱进行了表征。用氢氧化镧、氧化镧分别与柠檬酸进行固相反应,探讨了固相反应难易程度和结构的关系。乙酸镧和柠檬酸在室温下研磨能够发生固相反应生成柠檬酸镧。氢氧化镧也可以和柠檬酸发生固相反应,但反应速度很慢,而氧化镧不能和柠檬酸发生固相反应。

Lanthanum citrate was synthesized by solid phase reaction at room temperature from lanthanum acetate and citrate acid.Product is characterized by FTIR.Other routes using Lanthanum hydrate or lanthanum oxide as raw material were studied.The reaction process was monitored by FTIR.Lanthanum hydrate can react with citrate acid at very slow speed at room temperature.Lanthanum oxide cannot react with citrate acid.The easiness of solid-state reaction is relevant with structure of raw materials.