Question

What is the use of Baeyer's process in leaching?

Answer 1

Leaching

• The leaching of alumina from bauxite is an example of the leaching process.

Baeyer's process in leaching

• Baeyer’s process is used for refining bauxite to produce alumina(aluminum oxide).
• Bauxite is the principal ore of aluminum. It usually contains ${\mathrm{SiO}}_2$ , titanium oxide, and iron oxides as impurities.
• Aluminum ore is processed with concentrated Sodium hydroxide in Bayer's technique.
• It produces soluble sodium aluminate, which is filtered out.
• When the filtrate is heated with water, it produces aluminum hydroxide, which when heated further produces alumina.