| 摘要 |
Multi-stage process for production of aluminium chloride by chlorinating an aluminous material, for example, bauxite, preferably using chlorine and carbon monoxide or phosgene, condensing the gaseous product whereby a mixture of aluminium and ferric chlorides is separated from the chlorides of other elements present in the aluminous material and from carbon dioxide, separating the aluminium chloride from the ferric chloride by means of selective reduction, separating solid ferrous chloride and recovering substantially iron-free aluminium chloride in the vapour phase suitable for feeding to an electrolytic cell, and oxidising the ferrous chloride to produce an industrially useful iron oxide and chlorine, and the latter being recycled to the chlorination stage. |
