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Alumina from silicates
ICSOBA Newsletter (2017)
  • Fathi Habashi
While sodium hydroxide is used universally to recover alumina from bauxite, hydrochloric acid is proposed for leaching clay and anorthosite to get alumina. In the bauxite process red mud is a waste product while in the silicate process silica is a by-product. However, it is believed that alumina from silicates cannot compete with the Bayer process for reasons given. That is why the demonstration plant in Quebec shut down after six years of operation and spending $ 127 million. The nepheline process in Russia is successful because it is in alkaline medium among other things.
  • Kaolinite,
  • Anorthosite,
  • Nepheline,
  • Oxihydrolysis,
  • Red mud,
  • Silica,
  • Sodium carbonate
Publication Date
June, 2017
Citation Information
Fathi Habashi. "Alumina from silicates" ICSOBA Newsletter Vol. 17 Iss. June (2017) p. 12 - 14
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This work is licensed under a Creative Commons CC_BY International License.