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发明公开
CN110054210A 一种无水稀土卤化物的制备方法 无效 - 驳回

一种无水稀土卤化物的制备方法
摘要：
本发明提供了一种无水稀土卤化物的制备方法，包括以下步骤：(1)将水合卤化稀土REX3·xH2O在真空或气氛保护下，采用梯度升温的方法进行加热脱水，得粗无水稀土卤化物REX3；其中，X为F、Cl、Br、I元素，RE为Y、Sc等稀土元素；0≤x≤7；(2)将步骤(1)所得粗无水稀土卤化物REX3在一定温度和压力下使用对应的卤化氢气体或对应的卤化氢气体与惰性气体的混合气体进行二次卤化处理，制得无水稀土卤化物REX3。本发明所述的无水稀土卤化物的制备方法，以高纯水合溴化镧或高纯水合溴化铈或其它水合稀土卤化物为原料，经严格脱水后，于一定温度和压力下通入HBr、HF、HCl、HI气体进行二次卤化，可获的稀土无水卤化物的产品纯度大于99.95％。
摘要（英）：

The invention provides a preparation method of a waterless rare earth halide. The preparation method comprises following steps: 1, hydrate rare earth halide REX<3>.xH<2>O is subjected to heating dehydration through gradient heating under vacuum or atmosphere protection so as to obtain crude waterless rare earth halide REX<3>, wherein X is used for representing F, Cl, Br, and I, RE is used for representing rare earth elements such as Y and Sc, and 0<=x<=7; 2, the crude waterless rare earth halide REX<3> obtained in step 1 is subjected to secondary halogenation processing at a certain temperature under certain pressure with a corresponding hydrogen halide gas or a mixed gas of the corresponding hydrogen halide gas and an inert gas to prepare waterless rare earth halide REX<3>. According to the preparation method of the waterless rare earth halide REX<3>, high purity hydrate lanthanum bromide or high purity hydrate cerium bromide or other hydrate rare earth halides are taken as raw materials, strict dehydration is carried out, and HBr, HF, HCl, and HI gas is introduced at a certain temperature under certain pressure for secondary halogenations, so that the product purity of the obtained waterless rare earth halide is larger than 99.95%.

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