Question

Collector used in froth floatation process is :

• A. Methyl xanthate
• B. Ethyl xanthate
• C. Xanthyl methanoate
• D. Ethyl methyl xanthate

Answer 1

The correct option is B

Ethyl xanthate

Explanation for the correct options:

b) Ethyl xanthate $\left(C_3{H}_{6}O{S}_2\right):$

• Collectors absorb polar groups from ores grains and derive them on the surface for passage into the froth.
• Froth flotation is a way for setting apart hydrophobic and hydrophilic materials.
• Ethyl xanthate is utilized as a collector as it binds to the particles of the sulphide ore, rendering them water-resistant.

Explanation for the incorrect options:

a) Methyl xanthate $\left(C_2{H}_{4}O{S}_2\right):$

It fails to absorb polar groups from ores grains properly, so it is not used as a collector.

c) Xanthyl methanoate $\left(C_4{H}_8{O}_2\right):$

It is utilised in the tea and coffee decaffeination process, and not as a collector.

d) Ethyl methyl xanthate:

It is not used as a collector.

Hence, option (b) is correct. Ethyl xanthate $\left(C_3{H}_{6}O{S}_2\right)$ is the collector used in froth floatation process.