If bauxite contains SiO_2 as an impurity,whic | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) Bauxite ore often contains $SiO_2$,$Fe_2O_3$,and $TiO_2$ as impurities. When $SiO_2$ is the major impurity,Serpeck's process is used. In this proc

Vedclass · Accepted Answer

Serpeck's process

Vedclass · Answer

(D) Bauxite ore often contains $SiO_2$,$Fe_2O_3$,and $TiO_2$ as impurities. When $SiO_2$ is the major impurity,Serpeck's process is used. In this process,bauxite is heated with coke and nitrogen at $1800 \ ^\circ C$ to form aluminium nitride $(AlN)$,while $SiO_2$ is reduced to silicon $(Si)$ which volatilizes. $Al_2O_3 + 3C + N_2 \rightarrow 2AlN + 3CO$ $SiO_2 + 2C \rightarrow Si + 2CO$ The $AlN$ is then hydrolyzed to produce pure alumina.

If bauxite contains $SiO_2$ as an impurity,which of the following methods can be used for its purification?

Similar Questions

Wolframite ore is separated from tinstone $(SnO_2)$ by which of the following processes?

Froth floatation process is used for the concentration of

Which ore is concentrated by the froth flotation process?

In the extraction of $Al$,the chemical used in Serpeck's process is:

In the concentration of $PbS$ containing $ZnS$ as impurity,the depressant used is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module