The invention provides a process for the recovery of citric acid from an
aqueous solution feed stream originating in fermentation of carbohydrates
and utilizing an amine solvent extraction step for separation of
impurities comprising: subjecting said aqueous solution feed stream A to
a treatment for partial recovery of citric acid, wherein said treatment
is other than amine solvent extraction, to form a first portion of
purified citric acid B and a secondary feed stream F; subjecting at least
a portion G of said secondary feed stream F to a treatment consisting of
amine solvent extraction to form a second portion of purified citric acid
solution and to reject substantial of impurities initially present in
said portion of said secondary feed stream; subjecting said second
portion of purified citric acid solution to crystallization; and
recycling mother liquor from said crystallization.