Lithium iodide trihydrate NEW

Lithium iodide (chemical formula: LiI) is the iodide of lithium, which is a white crystal that is easily deliqued and becomes yellow when exposed to air. Nitric, sulfuric, or hydrochloric acid can also oxidize lithium iodide solutions to iodine. It is easily soluble in water and can be precipitated from aqueous solution. The anhydrous substance will continue to react with iodine to form LiIn polyiodides, and can also react with chlorine gas to form mixed halides. Both industrial and laboratory preparation of lithium iodide is by dissolving lithium carbonate or lithium hydroxide hydrate in newly prepared hydroiodic acid, and then evaporating the concentrated solution to obtain crystals. Lithium iodide can also be obtained by the reaction of ammonium iodide with lithium in liquid ammonia, and the other products are ammonia and hydrogen. When purifying lithium iodide, the hydrate can be heated in vacuum to dry dehydration and sublimation, or the hydrate can be dried in hydrogen iodide atmosphere, heated to melt and injected hydrogen to remove the iodine left by hydrogen iodide. Lithium iodide is used as an electrolyte in high-temperature and long-life batteries and is also used in catalytic dehydrogenation reactions of hydrocarbons.