A process for recovering phosphoric acid from a solid phosphorous-bearing raw material, said process comprising: a) a first leaching step of the phosphorous-bearing solid raw material with an acid aqueous solution having a pH between 1.5 and 3, thus obtaining: i) a leached solution comprising, solubilized, a main fraction of the phosphorous contained in the solid raw material in the form of phosphoric acid; and ii) a non-leached solid residue comprising the remaining fraction of the phosphorous contained in the solid raw material; b) a neutralization step of the leached solution obtained in step (a) in the presence of a neutralizing agent, thus precipitating the phosphorous contained in said leached solution; c) a second leaching step of the non-leached solid residue obtained in step (a) and of the precipitate obtained in step (b), with an acid aqueous solution having a pH lower than 0.5, thus obtaining a pregnant leached solution comprising phosphoric acid and solubilized iron; d) solvent extraction of the solubilized iron contained in the pregnant leached solution obtained in step c) with an organic solvent having affinity for iron, thus obtaining an iron-loaded organic liquid phase and an aqueous raffinate containing phosphoric acid; e) liquid-liquid extraction of the phosphoric acid from the aqueous raffinate obtained in step d) with an organic solvent, thus obtaining a phosphorous-loaded organic liquid phase and an aqueous raffinate containing impurities; f) stripping of phosphoric acid from the phosphorous-loaded organic liquid phase obtained in step f) with water at a temperature between 50 and 70°C, thus obtaining an aqueous solution containing phosphoric acid. a) a first leaching step of the phosphorous-bearing solid raw material with an acid aqueous solution having a pH between 1.5 and 3, thus obtaining: i) a leached solution comprising, solubilized, a main fraction of the phosphorous contained in the solid raw material in the form of phosphoric acid; and ii) a non-leached solid residue comprising the remaining fraction of the phosphorous contained in the solid raw material; i) a leached solution comprising, solubilized, a main fraction of the phosphorous contained in the solid raw material in the form of phosphoric acid; and ii) a non-leached solid residue comprising the remaining fraction of the phosphorous contained in the solid raw material; b) a neutralization step of the leached solution obtained in step (a) in the presence of a neutralizing agent, thus precipitating the phosphorous contained in said leached solution; c) a second leaching step of the non-leached solid residue obtained in step (a) and of the precipitate obtained in step (b), with an acid aqueous solution having a pH lower than 0.5, thus obtaining a pregnant leached solution comprising phosphoric acid and solubilized iron; d) solvent extraction of the solubilized iron contained in the pregnant leached solution obtained in step c) with an organic solvent having affinity for iron, thus obtaining an iron-loaded organic liquid phase and an aqueous raffinate containing phosphoric acid; e) liquid-liquid extraction of the phosphoric acid from the aqueous raffinate obtained in step d) with an organic solvent, thus obtaining a phosphorous-loaded organic liquid phase and an aqueous raffinate containing impurities; f) stripping of phosphoric acid from the phosphorous-loaded organic liquid phase obtained in step f) with water at a temperature between 50 and 70°C, thus obtaining an aqueous solution containing phosphoric acid.