Question

Name two methods by which hexylamine can be seperated from benzoic acid.

Answer 1

1) Hexylamine can be seperated from benzoic acid by treatment with dilute aq. HCl and then extraction with organic solvent such as ethylacetate. Organic layer contain benzoic acid. Hexylamine form salt with dil HCl and is soluble in aq. layer. Aq layer basify with dil NaOH and then extract with organic solvent to get pure hexylamine.

2) Hexylamine can be seperated from benzoic acid by treatment of aq. NaOH solution and extraction with organic solvent such as ethyl acetate. Organic layer contain hexylamine. Benzoic acid form salt with NaOH and soluble in aq. layer