A safe and efficient extraction process for the recovery of near saturated solution of potassium chloride, free of impurities wherein said process comprises the steps of: i. providing schoenite end liquor containing 4.0-5.5% w/v K + obtained from the decomposition of kainite mixed salt into schoenite; ii. treating schoenite end liquor containing 4.0-5.5% w/v K + as obtained in step (i) with a sub-stoichiometric amount of tartaric acid half-neutralized with Mg 2, to obtain potassium bi-tartrate and potassium depleted schoenite end liquor; iii. separating out and washing the precipitated potassium bi-tartrate as obtained in step (ii) with water; iv. adding the washings into the potassium-depleted schoenite end liquor; v. treating the potassium bi-tartrate as obtained in step (iii) with stoichiometric amount of MgCl 2 and Mg 2 to convert it into magnesium tartrate while releasing the potassium into solution as near saturated potassium chloride; vi. washing the magnesium tartrate as obtained in step (v) and separately preserving the washing; vii. treating the K-depleted schoenite end liquor as obtained in step (iv) and the potassium chloride solution obtained in step (v) with calcium carbonate and calcium chloride to precipitate out residual tartaric acid in the form of insoluble calcium tartrate; viii. adding the magnesium tartrate of step (v) into a fresh lot of schoenite end liquor SEL along with stoichiometric amount of aqueous HCl to once again precipitate out potassium bi-tartrate; ix. adding the potassium bitartrate from step (viii) into the washing of step (vi) and additional amount of water as required followed by treating with stoichiometric amounts of MgCl 2 and Mg 2 to once again precipitate out magnesium tartrate and obtaining once again a near saturated solution of KCl Potassium chloride followed by regenerating tartaric acid from calcium tartrate obtained in step (vii). i. providing schoenite end liquor containing 4.0-5.5% w/v K + obtained from the decomposition of kainite mixed salt into schoenite; ii. treating schoenite end liquor containing 4.0-5.5% w/v K + as obtained in step (i) with a sub-stoichiometric amount of tartaric acid half-neutralized with Mg 2, to obtain potassium bi-tartrate and potassium depleted schoenite end liquor; iii. separating out and washing the precipitated potassium bi-tartrate as obtained in step (ii) with water; iv. adding the washings into the potassium-depleted schoenite end liquor; v. treating the potassium bi-tartrate as obtained in step (iii) with stoichiometric amount of MgCl 2 and Mg 2 to convert it into magnesium tartrate while releasing the potassium into solution as near saturated potassium chloride; vi. washing the magnesium tartrate as obtained in step (v) and separately preserving the washing; vii. treating the K-depleted schoenite end liquor as obtained in step (iv) and the potassium chloride solution obtained in step (v) with calcium carbonate and calcium chloride to precipitate out residual tartaric acid in the form of insoluble calcium tartrate; viii. adding the magnesium tartrate of step (v) into a fresh lot of schoenite end liquor SEL along with stoichiometric amount of aqueous HCl to once again precipitate out potassium bi-tartrate; ix. adding the potassium bitartrate from step (viii) into the washing of step (vi) and additional amount of water as required followed by treating with stoichiometric amounts of MgCl 2 and Mg 2 to once again precipitate out magnesium tartrate and obtaining once again a near saturated solution of KCl Potassium chloride followed by regenerating tartaric acid from calcium tartrate obtained in step (vii).