Preparação de compostos de alumínio a partir da bauxita: considerações sobre alguns aspectos envolvidos em um experimento didático

Química Nova

Vera R. Leopoldo Constantino¹  Koiti Araki¹  Denise De Oliveira Silva¹  Wanda De Oliveira¹ 

[1] ,Universidade de São Paulo Instituto de Química Departamento de Química FundamentalSão Paulo SP

关键词: bauxite;    aluminum oxide;    potassium alum;   

DOI  :  10.1590/S0100-40422002000300024

来源: SciELO

【 摘 要 】

Aluminum metal and aluminum compounds have many applications in several branches of the industry and in our daily lives. The most important raw material for aluminum and its manufactured compounds is bauxite, a rock constituted mainly by aluminum hydroxides minerals. In this work, a didactic experiment aiming the preparation of alumina and potassium alum starting from bauxite is proposed for undergraduate students. Both compounds are of great commercial, scientific and historical interest. The experiment involves applications of important chemical principles such as acid-base and precipitation. Some chemical properties and uses of aluminum compounds are also illustrated.

【 授权许可】

CC BY-NC   
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