2. Production of Aluminium Chloride by electrolytic. To produce aluminium chloride, the aluminium metals can be extracted from raw material, such as clay or fly ash. For example, below are the methods of producing aluminium chloride from iron and phosphorus or magnesium-containing aluminium hexahydrate crystals. The preferred method of preparing anhydrous aluminum chloride comprises the steps of: a) Aluminous raw materials, such as clay, undergoes the drying and calcining process to activate the alumina fraction for HCl leaching; b) Dissolving the alumina fraction into soluble aluminum chloride by HCl leaching of calcined clay. c) Solid/liquid separation to obtain remove all the solid that still contain in aluminium chloride solution, typically by the use of settlers and/or filters; d) Separation of any soluble iron chloride from process liquor; e) Crystallization of filtrate to separate slurry from aluminum chloride hexahydrate crystals; f) Heating the aluminum chloride hexahydrate crystals to a temperature up to about 450oC. g) Reducing aluminium chloride hexahydrate crystals to form anhydrous aluminum chloride.
Posted on: Thu, 25 Jul 2013 06:38:41 +0000
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