Lepidolite Lithia Residue: Troost's Barium Fusion, Lithium Chloride Taken Out (Thorpe, 1912)

Lithium salts from lepidolite by Troost's method: the powdered mineral is fused with barium carbonate, barium sulphate and potassium sulphate, the alkali sulphate layer turned into chlorides with barium chloride, and the lithium chloride dissolved out with alcohol and ether. The saline chlorides left behind are the residue in which Bunsen found rubidium. The fusion separates into two layers: barium silicate and sulphate below, white potassium and lithium sulphate above. Source: T. E. Thorpe, Dictionary of Applied Chemistry vol. III (1912), p. 338. Picture: the book's text.

高级

Unknown

说明

Fuse with barium salts

Mix 10 parts finely powdered lepidolite with 10 parts barium carbonate, 5 parts barium sulphate and 3 parts potassium sulphate, and ignite at the highest heat of a wind furnace. Two layers form: barium silicate and sulphate below, white potassium and lithium sulphate above.

此步骤所需材料：

锂云母1 10 parts, finely powdered

碳酸钡（毒重石）1 10 parts

重晶石1 5 parts

硫酸钾1 3 parts

所需工具：

研钵与研杵

坩埚

木炭坩埚炉

Turn the alkalis into chlorides

Lixiviate the upper layer with water and treat it with barium chloride, which turns the alkalis into chlorides and throws down the sulphuric acid as barium sulphate. Filter.

此步骤所需材料：

氯化钡1 个

水1 个

所需工具：

滤纸

Take out the lithium chloride

Evaporate the solution to dryness and digest with equal parts of absolute alcohol and ether: the lithium chloride dissolves with only a trace of potassium and sodium chloride. What stays undissolved is the saline residue of alkali chlorides.

所需工具：