HOOPE’S PROCESS

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The Hoopes process is a metallurgical process, used to obtain the aluminium metal of very high purity. The process was patented by William Hoopes, a chemist of the Aluminum Company of America (ALCOA) in 1925. Aluminium obtained by this process is 99.9% pure. The cell used for this purpose contain three layers. The upper layer is pure aluminium act as cathode,the middle layer is the mixture of fluorides of aluminium and barium which act as electrolyte . The lowest layer is impure anode act as anode. On electrolysis pure aluminium is transferred from bottom to top layer.

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